2308-US - KEITHLEY - Product.Network

DC POWER SUPPLIES

www.keithley.com

1.888.KEITHLEY (U.S. only)

A Greater Measure of Conﬁdence

The Model 2308 Portable Device Battery/Charger

Simulator is optimized for use in testing mobile

phones and other portable, battery-operated

devices. When a device-under-test (DUT) transi-

tions nearly instantaneously from a sleep or

standby mode to the full power transmit state,

the Model 2308’s rapid response to load changes

means there’s little transient voltage drop from

the programmed output voltage and the output

recovers quickly. This fast response is particu-

larly critical when testing portable devices with

a pulsed mode of operation because it allows

the device to perform properly while it’s being

tested. In contrast, the slow-responding source

voltage typical of conventional power supplies

causes the DUT to perform improperly, lead-

ing to production yield problems and costly

retesting.

The Model 2308 offers a complete solution for portable device sourcing and load current measure-

ment. It has two independent power supply channels: one is optimized to simulate a battery; the

second channel is optimized to perform like a charger for a rechargeable battery. The battery chan-

nel’s variable output resistance can be used to simulate the internal resistance of a battery so design

and test engineers can simulate a battery’s output for testing devices under realistic operating con-

ditions. This channel also sinks current to simulate a discharged battery. The charger channel can

supply a voltage to test a portable device’s battery charge control circuitry, with the battery channel

acting as the discharged battery load.

In addition to maintaining output voltage levels under difficult load conditions, the Model 2308

can measure a wide dynamic range of load current levels and can measure narrow current pulses

(or pulses as narrow as 50µs). That makes it ideal for characterizing device power consumption by

making low-level sleep mode measurements as well as pulsed operating load currents.

Maximize production yield with fast response to load changes

Mobile phones, other portable devices (such as Bluetooth headsets, MP3 players, etc.), and RF com-

ponents such as power amplifiers, power transistors, and transmitter modules experience large

instantaneous load changes when they transition from a standby state to full power operation. For a

mobile phone, the load current can change from

a 100mA standby current to a 1A transmission

current or a 10× (1000%) increase in the load

current. The Model 2308 maintains a reliable,

stable level of voltage output, even when the

DUT produces large load current changes and/or

has a pulsed operating mode.

The Model 2308’s fast recovery from load

changes helps prevent the causes of false failures

and destroyed devices in production test as well

as field failure quality problems due to compro-

mised components. The Model 2308 assures you

of a stable, constant voltage source to maximize

production yield and minimize production retest

and rework costs.

•Specialized dual-channel power

supply for design and testing

of portable, battery-operated

devices

•Ultra-fast response to pulsed

load operation

•Speed-optimized command set

reduces test times

•Variable output resistance for

simulating an actual battery’s

output response

•Simulate a discharged battery

and test charge control circuit

performance with both a

battery supply that can sink up

to 3A and a charger supply

•Pulse peak, average, and

baseline current measurements

•Integrating A/D converter for

more precise measurements

•100nA current measurement

sensitivity

•Analog output for complete

load current waveform

characterization

•Catch production wiring

problems immediately with

open sense-lead detection

•Built-in digital voltmeter

•Four built-in digital control lines

2308

Portable Device Battery/Charger Simulator

APPLICATIONS

• Design and test of a wide

range of consumer electronics,

including:

– Mobile phones, mobile radios,

cordless phones, and Bluetooth

headsets

– MP3 players, portable digital

assistants (PDAs), digital

cameras, GPS receivers, and

notebook computers

• Design and test of electronic

components such as RFIC power

amplifiers, RF power transistors,

and baseband and wireless

chipsets for portable wireless

devices

Fast transient response power supply

DC POWER SUPPLIES

A Greater Measure of Conﬁdence

www.keithley.com

1.888.KEITHLEY (U.S. only)

(500mA/

div)

(500mV/

div)

Time 100µs/div

(500mA/

div)

(500mV/

div)

Time 100µs/div

Conventional Power Supply Model 2308

Reduce test costs and increase

throughput with high speed

command structure

To minimize production test times while still

giving you all the information you need to char-

acterize your devices fully, the Model 2308 is

designed with a command structure optimized

for speed, with voltage step times as short as

6ms and DC load current measurements in just

22ms. Commands that combine range changing

and current measurement let you acquire the

command, make the measurement, and transfer

the data in as little as 30ms. In addition, special

operating modes, such as the pulse current step

mode, allow taking a number of measurements

on a complex load current waveform with a

single command.

Characterize load currents for

power consumption verification

Characterizing the battery life of portable

devices demands the ability to measure complex

current waveforms over a wide dynamic range.

The Model 2308 offers a far broader range of

capabilities than conventional power supplies for

measuring low current levels, peak pulse current

levels, long-period load current waveforms, and

multi-level current waveforms. A choice of four

Ordering Information

2308 Portable Device Battery/

Charger Simulator

Accessories Supplied

CD with documentation,

output connectors mating

terminal (part no. CS-846)

Model 2308 vs. Conventional

Power Supplies

Large load changes will cause a large instan-

taneous drop in a conventional power sup-

ply’s voltage output. If the supply’s recovery

time is long, the DUT will turn off when the

supply voltage falls below the DUT’s low

battery turn-off threshold—producing a

false failure. Even if the DUT does not turn

off, the drop-off in input power prevents

the output (RF or a power pulse) from

meeting its specification—a specification

failure. Furthermore, the conventional

power supply may have an excessively large

overshoot when the DUT’s load current

transitions from its operating load back to

its standby load. The magnitude of the tran-

sient overshoot voltage could even be large

enough to exceed the maximum safe input

voltage, either rendering the device inoper-

able or damaging some components—a

device failure or a field failure.

Your DC source leads are a transmission line when your

portable device operates in a narrow pulsed mode.

Under pulsed operating conditions, your load circuit is an L-C-R network and that load impe-

dance can cause problems for your power supply. Keithley’s fast transient power supplies are

designed to maintain a stable voltage under difficult, narrow pulse, loading conditions and to

maintain the output voltage, even with long lengths of wire between the power supply and the

DUT. The design of your DC sourcing test circuit requires just as much effort as your AC or RF

test circuits. Using a fast transient response, battery simulating power supply needs to be a key

part of your DC test circuit design.

Power Source

Sense Leads

Source Leads

Load Current

DUT

The DC source leads become a transmission line during dynamic load swings.

Compare the response of a conventional power supply (left) with the response of a Model

2308 (right) when both are powering a device operating on the EDGE mobile phone standard.

Note how the conventional power supply distorts the load current and cannot maintain a

stable source voltage, which in turn distorts the RF output signal.

2308

Portable Device Battery/Charger Simulator

ACCESSORIES AVAILABLE

2306-DISP Remote Display

CS-846 Mating Output Connector

SC-182 Low Inductance Coaxial Cable

IEEE-488 INTERFACE CONTROLLER CARDS

KPCI-488LPA IEEE-488.2 Interface Board for the PCI bus

KUSB-488B IEEE-488.2 USB-to-GPIB Interface Adapter for USB

Port with built-in 2m (6.6ft) cable

IEEE-488 INTERFACE CABLES

7007-05 Double Shielded Premium IEEE-488 Cable, 0.5m (1.6ft)

7007-1 Double Shielded Premium IEEE-488 Cable, 1m (3.2ft)

7007-2 Double Shielded Premium IEEE-488 Cable, 2m (6.5ft)

7007-3 Double Shielded Premium IEEE-488 Cable, 3m (10ft)

7007-4 Double Shielded Premium IEEE-488 Cable, 4m (13ft)

RACK MOUNT KITS

4288-1 Single Fixed Rack Mount Kit

4288-2 Dual Fixed Rack Mount Kit

SERVICES AVAILABLE

2308-3Y-EW 1-Year Factory Warranty Extended to 3 Years for

the Model 2308

2308-3Y-17025 3 (ISO-17025 Accredited) Calibrations within 3

Years of Purchase

2308-3Y-DATA 3 (ANSI-Z540-1 Compliant) Calibrations within 3

Years of Purchase

Fast transient response power supply

DC POWER SUPPLIES

www.keithley.com

1.888.KEITHLEY (U.S. only)

A Greater Measure of Conﬁdence

ranges (5mA, 50mA, 500mA, and 5A) allows measuring load currents

with exceptional resolution and accuracy.

Measure sleep and standby currents with

the accuracy of integrating A/D technology

The Model 2308 is designed for fast and accurate measurements of devices

in low power modes such as the sleep, hibernate, or standby state. It can

resolve currents down to 100nA and measure them with 0.2% accuracy.

The Model 2308 uses an integrating A/D converter that continuously

acquires the signal rather than capturing discrete samples; this provides a

more accurate measurement than other A/D techniques. In addition, the

averaging effect built into integrating A/D converters reduces noise and

delivers highly stable current readings. You can measure low and high

currents at the same speed with no degradation in accuracy, so the Model

2308 is equally well-suited for the test line and the design lab.

Measure load currents from pulsed-output devices

Devices like GSM-, EDGE-, WLAN-, and WiMAX-based mobile phones gen-

erate pulsed outputs. Determining their total power consumption requires

measuring both the baseline current and the peak of the pulsed load

current. The Model 2308 can capture peak currents of pulses as short as

50µs and as long as 833ms. Programmable trigger levels allow controlled

capture of the pulse, then the Model 2308’s programmable measurement

delay and acquisition times make it easy to avoid rising edge transients so

the pulse peak can be measured accurately. The instrument can also meas-

ure the pulse baseline current and the pulse average load current.

A long integration current mode supports measuring pulse trains with

periods longer than 850ms. In this mode, the Model 2308 can measure

average current on a load current waveform with a period from 850ms to

60 seconds.

High current level

Trigger level

High

Time

Low current level

Low Time

Average Time

(out to 60s with lon

inte

ration)

The Model 2308 can measure peak pulse currents, average currents,

and baseline currents.

Take multiple measurements on start-up sequences or

on current levels at different voltage operating levels

Need to analyze a device’s circuitry during the power-up phase as it transi-

tions from a sleep mode or an off-state? The Model 2308’s pulse step cur-

rent function has the speed needed to measure the load current start-up

levels in a single device start-up so that the measurements can be per-

formed in production without an increase in test time.

The pulse step current function also offers a fast way to determine load

currents of different operating states. For example, as source voltage levels

are varied over a device’s operating range, the corresponding operating

current levels can be measured without executing multiple commands for

a significant time-savings when testing integrated circuits over their allow-

able range of Vcc levels.

Capture the complete load current waveform

Two built-in analog outputs help designers of device’s verify design perfor-

mance and ensure its current draw conforms to design specifications with-

out the need to connect any sensing circuitry in the power supply circuit.

Once these outputs are connected to an oscilloscope or a data acquisition

module, the load current waveform can be displayed or digitized and ana-

lyzed in a computer. When the Model 2308 is connected to a data acquisi-

tion module, the data acquisition module can sample the waveform at any

sampling rate to create a record of any length desired.

Test under realistic conditions with true battery simulation

When a portable battery-operated device transitions from one load current

level to another, the battery voltage supplying the current will drop by

the product of the change in current and the battery’s internal resistance.

During the load current pulse, the device must operate with a voltage

reduced by the battery’s internal resistance. The Model 2308 allows simu-

lating this resistance so its output is almost identical to a battery’s output,

allowing design or production test engineers to test devices or components

under realistic conditions. This patented1 technique permits the output

resistance to be programmed between 0W and 1W with 10mW resolution.

You can also decrease the voltage and increase the output resistance while

the output is on to simulate the discharge of the battery.

(1A/

div)

(50mV/

div)

Time 100µs/divTime 100µs/div

Lithium Ion Battery with

130mΩ Internal Resistance

Model 2308 with Output Resistance

Programmed to 130mΩ

The Model 2308’s programmable output resistance (right) allows it to

simulate the output of a real battery (left), a capability conventional

power supplies do not have. The 2308 output is identical to the

battery’s response.

1. U.S. Patent Number 6,204,647 B1

2308 Portable Device Battery/Charger Simulator

I7I8

Trigger Levels

Load Currents

With a single command, the Model 2308’s high speed pulse step

current function can quickly capture varying load current levels to

speed test throughput.

Fast transient response power supply

DC POWER SUPPLIES

A Greater Measure of Conﬁdence

www.keithley.com

1.888.KEITHLEY (U.S. only)

Test a device’s charge control circuitry

Both channels of the Model 2308 sink up to 3A of current continuously.

Therefore, the battery channel can act like a discharged re-chargeable

battery. The charger channel can supply a charging voltage for use in

testing the operation of the DUT’s charging control circuitry. Because the

charger channel can also act as an electronic load, the battery channel can

operate the device and the charger channel can act as a load to test a bat-

tery capacity monitor or some other device function that requires a load.

–

Battery Channel Charger Channel

Vbattery

Vcharger > Vbatter

Battery

Terminals Charger

Terminals

–

For charger control circuit testing, the Model 2308’s battery channel

can sink current to simulate a discharged battery while the charger

channel simulates a charger. One instrument provides high versatility

for portable device testing.

Reduce testing errors and retesting costs

with remote sense lead monitoring

Remote sensing capabilities let the Model 2308 ensure the voltage pro-

grammed is what is actually applied to the load. As DUTs are continuously

inserted and removed from test fixtures, the instrument ensures this pro-

grammed voltage is maintained with an open sense lead detection mon-

itor—any break in a sense lead connection is detected immediately. The

open sense lead detection monitor eliminates the possibility that numerous

devices could be tested or calibrated at an incorrect voltage.

Save with multiple instruments in one package –

two power supplies, a DVM, digital controls, and a

remote display

The Model 2308 saves on both instrumentation costs and rack space by

packing two independent power supply channels in one compact, 2U half-

rack enclosure, along with additional capabilities power supplies rarely

offer. For example, the built-in DC digital voltmeter can measure voltages

in the DUT circuitry from -5VDC to +30VDC. The DVM and the battery

channel voltage source can operate simultaneously. For many applications,

the Model 2308 can eliminate the need for a separate DMM.

The digital outputs the Model 2308 provides can sink up to 100mA to con-

trol relays. External relays can be powered either by the internal 5V source

or an external source with a maximum voltage of 24V. For applications that

require only a few digital control lines, the Model 2308 eliminates the need

for an additional control module.

Need to reduce your test

system size or want more sys-

tem organization flexibility?

Then mount the Model 2308

in the back of a test rack or

near the test fixture—mount-

ing the instrument in the

test rack is unnecessary. The

Model 2308’s tiny (4.6 in. ×

2.7 in.) remote display can be

mounted anywhere for easy

viewing of the outputs of both

channels. If the Model 2308 is

inaccessible, you can control it

from the remote display because it has all the front panel pushbuttons that

are on the instrument itself.

Reduce test system problems with low impedance cable

Keithley’s SC-182 Low Inductance Coaxial Cable is designed to minimize

the impedance and reduce the susceptibility to external EMI in your DC

source-DUT circuit. This cable’s characteristic impedance is nominally 15W

with a low 42nH/ft of inductance and a low 182pF/ft of capacitance. In con-

trast, a typical coaxial cable has 50W or 75W characteristic impedance and

twisted-wire pairs have at least 80W of characteristic impedance.

DVM

–

VOUT

VIN

–5V to +30V DC

Rsense

–

The Model 2308’s charger channel contains a built-in DVM, eliminating

the need for a separate instrument in many test systems.

The Model 2306-DISP display can be

mounted for easy viewing when the

instrument itself must be mounted in

an inaccessible location.

2308 Portable Device Battery/Charger Simulator

Model 2308 rear panel

Fast transient response power supply

DC POWER SUPPLIES

www.keithley.com

1.888.KEITHLEY (U.S. only)

A Greater Measure of Conﬁdence

OUTPUT #1 (Battery Channel):

DC VOLTAGE OUTPUT (1 Year, 23°C ± 5°C)

OUTPUT VOLTAGE: 0 to +15VDC.

OUTPUT ACCURACY: (0.05% + 3mV).

PROGRAMMING RESOLUTION: 1mV.

READBACK ACCURACY1: ±(0.05% + 3mV).

READBACK RESOLUTION: 1mV.

OUTPUT VOLTAGE SETTLING TIME: 5ms to within stated accuracy.

LOAD REGULATION: 0.01% + 2mV.

LINE REGULATION: 0.5mV.

STABILITY2: 0.01% + 0.5mV.

MEASUREMENT TIME CHOICES: 0.002 to 10PLC3, in 0.002PLC steps.

AVERAGE READINGS: 1 to 10.

TRANSIENT RESPONSE: High Bandwidth Low Bandwidth

Transient Recovery Time4 <35 µs5 <50 µs5

Transient Voltage Drop <90 mV5 <180 mV5

REMOTE SENSE: 1V max. drop in each lead. Add 2mV to the voltage load regulation specifica-

tion for each 1V change in the negative output lead due to load current change. Remote sense

required. Integrity of connection continually monitored. If compromised, output will turn off

automatically once settable window (±0 to ±8 volts) around normal voltage exceeded.

VARIABLE OUTPUT IMPEDANCE: Range: 0 to 1.00W in 0.01W steps. Value can be changed with

output on.

NOTES

1. At PLC (Power Line Cycle) = 1.

2. Following 15 minute warm-up, the change in output over 8 hours under ambient temperature, constant load,

and line operating conditions.

3. PLC = Power Line Cycle. 1PLC = 16.7ms for 60Hz operation, 20ms for 50Hz operation.

4. Recovery to within 20mV of previous level.

5. Remote sense, at terminals 1 and 6, with 4.5m (15 feet) 16 AWG (1.31mm2) twisted pair, with 1.5A load change,

(0.15A to 1.65A) resistive load only, typical.

DC CURRENT (1 Year, 23°C ± 5°C)

CONTINUOUS AVERAGE OUTPUT CURRENT

CHANNEL #2 (CHARGER) OFF:

I = 50W/(Vset channel 1 + 6V); 5A max.1

CHANNEL #2 (CHARGER) ON:

I = (50W – power consumed by channel #2)/(Vset channel 1 + 6V); 5A max.1

The power consumed by channel #2 is calculated as:

Channel #2 Sourcing Current: Power consumed = (Vset channel 2 + 6V) × (current supplied).

Channel #2 Sinking Current: Power consumed = 5V × (sink current).

CONTINUOUS AVERAGE SINK CURRENT

CHANNEL #2 (CHARGER) OFF:

0–5V: 3A max.

5–15V: Derate 0.2A per volt above 5V. Compliance setting controls sinking.

CHANNEL #2 (CHARGER) ON:

Available Current = (50W – Power consumed by channel #2)/5V; 3A max. (0–5V).

Derate 0.2A per volt above 5V.

DC CURRENT (1 Year, 23°C ± 5°C) (continued)

SOURCE COMPLIANCE ACCURACY: ±(0.16% + 5mA).2

PROGRAMMED SOURCE COMPLIANCE RESOLUTION: ±1.25mA.

READBACK ACCURACY: 5A Range: ±(0.2% + 200µA).

500mA Range: ±(0.2% + 100µA).

50 mA Range: ±(0.2% + 5µA).

5mA Range: ±(0.2% + 2µA).

READBACK RESOLUTION: 5A Range: 100µA.

500mA Range: 10µA.

50 mA Range: 1µA.

5mA Range: 0.1µA.

LOAD REGULATION: 0.01% + 1mA.

LINE REGULATION: 0.5mA.

STABILIT Y: 0.01% + 50µA.

MEASUREMENT TIME CHOICES: 0.002 to 10 PLC3, in 0.002PLC steps.

AVERAGE READINGS: 1 to 10.

NOTES

1. Peak current can be a max. of 5A provided the average current is within the stated limits and terminals 1 and 6

are used.

2. Minimum current in constant current mode is 6mA.

3. PLC = Power Line Cycle. 1PLC = 16.7ms for 60Hz operation, 20ms for 50Hz operation.

PULSE CURRENT MEASUREMENT OPERATION

TRIGGER LEVEL: 5A Range: 0A to 5A, in 5mA steps.

500mA Range: 0mA to 500mA, in 0.5mA or 500µA steps.

50mA Range: 0mA to 50mA, in 0.05mA or 50µA steps.

5mA Range: 0mA to 5mA, in 0.005mA or 5µA steps.

TRIGGER DELAY: 0 to 100ms, in 10µs steps.

INTERNAL TRIGGER DELAY: 10µs.

HIGH/LOW/AVERAGE MODE: Measurement Aperture Settings: 33.3µs to 833ms, in 33.3µs

steps. Average Readings: 1 to 100.

PULSE CURRENT MEASUREMENT ACCURACY1 (1 Year, 23°C ± 5°C):

Aperture

Accuracy ±(% reading + offset)

5A Range 500mA Range 50mA Range 5mA Range

<100 µs 0.3% + 2 mA 0.3% + 1 mA 0.3% + 700 µA 0.3% + 200 µA

100 µs – 200 µs 0.3% + 2 mA 0.3% + 1 mA 0.3% + 700 µA 0.3% + 100 µA

200 µs – 500 µs 0.3% + 2 mA 0.3% + 1 mA 0.3% + 700 µA 0.3% + 100 µA

500 µs – <1 PLC 0.3% + 900 µA 0.3% + 900 µA 0.3% + 500 µA 0.3% + 90 µA

1 PLC20.3% + 900 µA 0.3% + 900 µA 0.3% + 200 µA 0.3% + 90 µA

>1 PLC 0.3% + 900 µA 0.3% + 900 µA 0.3% + 200 µA 0.3% + 90 µA

NOTES

1. Based on settled signal: 100µs pulse trigger delay.

2. Also applies to other apertures that are integer multiples of 1PLC.

BURST MODE CURRENT MEASUREMENT

MEASUREMENT APERTURE: 33.3µs to 833ms, in 33.3µs steps.

CONVERSION RATE: 4100/second, typical.1

INTERNAL TRIGGER DELAY: 10µs.

NUMBER OF SAMPLES: 1 to 5000.

TRANSFER SAMPLES ACROSS IEEE BUS IN BINARY MODE2: 4400 readings/s, typical (4 bytes

per reading).

NOTES

1. At 33.3µs aperture.

2. Display off, Message Exchange Protocol (MEP) off, auto zero off.

LONG INTEGRATION MODE CURRENT MEASUREMENT

MEASUREMENT TIME, 60Hz (50Hz): 850ms (840ms) to 60 seconds in 1ms steps.

ANALOG OUTPUT

5A/500mA OUTPUT: 1V/A ± 25mA (typical).

50mA/5mA OUTPUT: 1V/10mA ± 0.25mA (typical).

INTERNAL IMPEDANCE: 1000W (nominal).

2308 Portable Device Battery/Charger Simulator

Model 2308 specifications

DC POWER SUPPLIES

A Greater Measure of Conﬁdence

www.keithley.com

1.888.KEITHLEY (U.S. only)

OUTPUT #2 (Charger Channel)

DC VOLTAGE OUTPUT (1 Year, 23°C ± 5°C)

OUTPUT VOLTAGE: 0 to +15VDC.

OUTPUT ACCURACY: ±(0.05% + 10mV).

PROGRAMMING RESOLUTION: 10mV.

READBACK ACCURACY1: ±(0.05% + 3mV).

READBACK RESOLUTION: 1mV.

OUTPUT VOLTAGE SETTLING TIME: 5ms to within stated accuracy.

LOAD REGULATION: 0.01% + 2mV.

LINE REGULATION: 0.5mV.

STABILITY2: 0.01% + 0.5mV.

MEASUREMENT TIME CHOICES: 0.002 to 10 PLC3, in 0.002 PLC steps.

AVERAGE READINGS: 1 to 10.

TRANSIENT RESPONSE: High Bandwidth Low Bandwidth

Transient Recovery Time4 <50 µs5 <60 µs5

Transient Voltage Drop <180 mV5 <500 mV5

REMOTE SENSE: 1V max. drop in each lead. Add 2mV to the voltage load regulation specifica-

tion for each 1V change in the negative output lead due to load current change. Remote sense

required. Integrity of connection continually monitored. If compromised, output will turn off

automatically once settable window (±0 to ±8 volts) around normal voltage exceeded.

NOTES

1. At 1PLC.

2. Following 15 minute warm-up, the change in output over 8 hours under ambient temperature, constant load,

and line operating conditions.

3. PLC = Power Line Cycle. 1PLC = 16.7ms for 60Hz operation, 20ms for 50Hz operation.

4. Recovery to within 20mV of previous level.

5. Remote sense, with 4.5m (15 feet) of 16 AWG (1.31mm2) wire, 1.5A load change (0.15A to 1.65A), resistive

load only.

DC CURRENT (1 YEAR, 23°C ± 5°C)

CONTINUOUS AVERAGE OUTPUT CURRENT

CHANNEL #1 (BATTERY) OFF:

I = 50W/(Vset channel 2 + 6V); 5A max.1

CHANNEL #1 (BATTERY) ON:

I = (50W – power consumed by channel #1)/(Vset channel 2 + 6V); 5A max.1

The power consumed by channel #1 is calculated as:

Channel #1 Sourcing Current: Power consumed = (Vset channel 1 + 6V) × (current supplied).

Channel #1 Sinking Current: Power consumed = 5V × (sink current).

CONTINUOUS AVERAGE SINK CURRENT

CHANNEL #1 (BATTERY) OFF:

0–5V: 3A max.

5–15V: Derate 0.2A per volt above 5V. Compliance setting controls sinking.

CHANNEL #1 (BATTERY) ON:

Available Current = (50W – Power consumed by channel #1)/5V; 3A max. (0–5V)1.

Derate 0.2A per volt above 5V.

DC CURRENT (1 YEAR, 23°C ± 5°C) (continued)

SOURCE COMPLIANCE ACCURACY: ±(0.16% + 5mA).2

PROGRAMMED SOURCE COMPLIANCE RESOLUTION: ±1.25mA.

READBACK ACCURACY: 5A Range: ±(0.2% + 200µA).

5mA Range: ±(0.2% + 2µA).

READBACK RESOLUTION: 5A Range: 100µA.

5mA Range: 0.1µA.

LOAD REGULATION: 0.01% + 1mA.

LINE REGULATION: 0.5mA.

STABILIT Y: 0.01% + 50µA.

MEASUREMENT TIME CHOICES: 0.002 to 10 PLC3, in 0.002 PLC steps.

AVERAGE READINGS: 1 to 10.

NOTES

1. Peak current can be a max. of 5A provided the average current is within the stated limits.

2. Minimum current in constant current mode is 6mA.

3. PLC = Power Line Cycle. 1PLC = 16.7ms for 60Hz operation, 20ms for 50Hz operation.

PULSE CURRENT MEASUREMENT OPERATION

TRIGGER LEVEL: 5A Range: 5mA to 5A, in 5mA steps.

TRIGGER DELAY: 0 to 100ms, in 10µs steps.

INTERNAL TRIGGER DELAY: 10µs.

HIGH/LOW/AVERAGE MODE:

Measurement Aperture Settings: 33.3µs to 833ms, in 33.3µs steps.

Average Readings: 1 to 100.

PULSE CURRENT MEASUREMENT ACCURACY1 (1 Year, 23°C ± 5°C):

Aperture

Accuracy ±(% reading + offset)

5A Range

<100 µs 0.3% + 2 mA

100 µs – 200 µs 0.3% + 2 mA

200 µs – 500 µs 0.3% + 2 mA

500 µs – <1 PLC 0.3% + 900 µA

1 PLC20.3% + 900 µA

>1 PLC 0.3% + 900 µA

NOTES

1. Based on settled signal: 100µs pulse trigger delay.

2. Also applies to other apertures that are integer multiples of 1PLC.

BURST MODE CURRENT MEASUREMENT

MEASUREMENT APERTURE: 33.3µs to 833ms, in 33.3µs steps.

CONVERSION RATE: 4100/second, typical.1

INTERNAL TRIGGER DELAY: 10µs.

NUMBER OF SAMPLES: 1 to 5000.

TRANSFER SAMPLES ACROSS IEEE BUS IN BINARY MODE2: 4400 readings/s, typical (4 bytes

per reading).

NOTES

1. At 33.3µs aperture.

2. Display off, Message Exchange Protocol (MEP) off, auto zero off.

2308 Portable Device Battery/Charger Simulator

Model 2308 specifications

DC POWER SUPPLIES

www.keithley.com

1.888.KEITHLEY (U.S. only)

A Greater Measure of Conﬁdence

GENERAL

ISOLATION (LOW–EARTH): 22VDC max. Do not exceed 60VDC between any two terminals

of either connector.

PROGRAMMING: IEEE-488.2 (SCPI).

USER-DEFINABLE POWER-UP STATES: 4.

REAR PANEL CONNECTORS: Two 8-position quick disconnect terminal blocks.

TEMPERATURE COEFFICIENT (outside 23°C ±5°C): Derate accuracy specification by

(0.1 × specification)/°C.

OPERATING TEMPERATURE: 0° to 50°C (derate to 70%). 0° to 35°C (Full power).

STORAGE TEMPERATURE: –20° to 70°C.

HUMIDIT Y: <80% @ 35°C non-condensing.

DISPLAY TYPE: 2-line × 16 character VFD.

REMOTE DISPLAY/KEYPAD OPTION: Disables standard front panel.

DIMENSIONS: 89mm high × 213mm wide × 411mm deep (3½ in × 83⁄8 in × 163⁄16 in).

NET WEIGHT: 3.2kg (7.1 lbs).

SHIPPING WEIGHT: 5.4kg (12 lbs).

INPUT POWER: 100–120VAC/220–240VAC, 50 or 60Hz (auto detected at power-up).

POWER CONSUMPTION: 150VA max.

EMC: Conforms with European Union Directive 2004/108/EC.

SAFETY: Conforms with European Union Directive 2006/95/EC, EN 61010-1.

AC LINE LEAKAGE CURRENT: 450µA @ 110VAC, typ.; 600µA @ 220V, typical.

RELAY CONTROL PORT: 4-channel, each capable of 100mA sink, 24V max. Total port sink

capacity (all 4 combined) is 250mA max. Accepts DB-9 male plug. A source of +5VDC ref-

erenced to output common is also provided on the port to power external 5V relays.

2308 Portable Device Battery/Charger Simulator

LONG INTEGRATION MODE CURRENT MEASUREMENT

MEASUREMENT TIME, 60Hz (50Hz): 850ms (840ms) to 60 seconds in 1ms steps.

DIGITAL VOLTMETER INPUT (1 Year, 23°C ± 5°C)

INPUT VOLTAGE RANGE: –5 to +30VDC.

INPUT IMPEDANCE: 2MW typical.

MAX. VOLTAGE (either input terminal) WITH RESPECT TO OUTPUT LOW: –5V, +30V.

READING ACCURACY: ±(0.05% + 3mV).

READING RESOLUTION: 1mV.

CONNECTOR: HI and LO input pair part of Output #2’s terminal block.

MEASUREMENT TIME CHOICES: 0.002 to 10 PLC1, in 0.002 PLC steps.

AVERAGE READINGS: 1 to 10.

NOTES

1. PLC = 1.00 Power Line Cycle.

Operating Speeds (Typical)

Channel 1 Channel 2

Voltage Step Time 1 6 ms 7 ms

DC Current Reading Time 1, 2, 3 22 ms 22 ms

DC Current Range Change and Read Time 1, 2, 3 27 ms

Digital Voltmeter 1, 2, 3 22 ms

NOTES

1. Display off, message exchange protocal (MEP) off, auto zero off.

2. PLC = 1 power line cycle.

3. Includes measurement and binary data transfer out of the GPIB port.

OUTPUT #2 (Charger Channel) (continued)

Model 2308 specifications