Figure 1. ADS-946 Functional Block Diagram
REF
DAC
REGISTERREGISTER
OUTPUT REGISTER
16 BIT 14 (LSB)
15 BIT 13
12 BIT 12
11 BIT 11
10 BIT 10
9 BIT 9
8 BIT 8
7 BIT 7
6 BIT 6
5 BIT 5
4 BIT 4
3 BIT 3
2 BIT 2
1 BIT 1 (MSB)
TIMING AND
CONTROL LOGIC
OFFSET ADJUST 23
ANALOG INPUT 21
START CONVERT 18
EOC 17
+5V ANALOG SUPPLY 22
+5V DIGITAL SUPPLY 13
–5V SUPPLY 20
ANALOG GROUND 19, 24
DIGITAL GROUND 14
–
+
S/H
BUFFER
DIGITAL CORRECTION LOGIC
FLASH
ADC
1
FLASH
ADC
2
POWER AND GROUNDING
6
AMP
BLOCK DIAGRAM
The low-cost ADS-946 is a 14-bit, 8MHz sam-
pling A/D converter. This device accurately samples
full-scale input signals up to Nyquist frequencies
with no missing codes. Excellent differential nonlin-
earity error (DNL), signal-to-noise ratio (SNR), and
total harmonic distortion (THD) make the ADS-946
the ideal choice for both time-domain (CCD/FPA
imaging, scanners, process control) and frequency-
domain (radar, telecommunications, spectrum
analysis) applications.
The functionally complete ADS-946 contains a
fast-settling sample-hold amplifi er, a subranging
(two-pass) A/D converter, an internal reference,
timing/control logic, and error-correction circuitry.
Digital input and output levels are TTL. The ADS-
946 only requires the rising edge of a start convert
pulse to operate.
Requiring only ±5V supplies, the ADS-946
typically dissipates just 2 Watts. The device is
offered with a bipolar input range of ±2V. Models
are available for use in either commercial (0 to
+70°C) or HI-REL (–55 to +125°C) operating
temperature ranges. A proprietary, auto-calibrating,
error-correcting circuit allows the device to achieve
specifi ed performance over the full HI-REL tem-
perature range.
PRODUCT OVERVIEW
INPUT/OUTPUT CONNECTIONS
PIN FUNCTION PIN FUNCTION
1 BIT 1 (MSB) 24 ANALOG GROUND
2 BIT 2 23 OFFSET ADJUST
3 BIT 3 22 +5V ANALOG SUPPLY
4 BIT 4 21 ANALOG INPUT
5 BIT 5 20 –5V SUPPLY
6 BIT 6 19 ANALOG GROUND
7 BIT 7 18 START CONVERT
8 BIT 8 17 EOC
9 BIT 9 16 BIT 14 (LSB)
10 BIT 10 15 BIT 13
11 BIT 11 14 DIGITAL GROUND
12 BIT 12 13 +5V DIGITAL SUPPLY
FEATURES
■ 14-bit resolution
■ 8MHz guaranteed sampling rate
■ No missing codes over full HI-REL temperature
range
■ Ideal for both time and frequency-domain
applications
■ Excellent THD (–75dB) and SNR (77dB)
■ Edge-triggered; No pipeline delays
■ Small, 24-pin, ceramic DDIP or SMT
■ Requires only ±5V supplies
■ Low-power, 2 Watts
■ MIL-STD-883 screening available
ADS-946
14-Bit, 8MHz Sampling A/D Converters
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
01 Apr 2011 MDA_ADS-946.B02 Page 1 of 8
PHYSICAL/ENVIRONMENTAL
PARAMETERS MIN. TYP. MAX. UNITS
Operating Temp. Range, Case
ADS-946 0 — +70 °C
ADS-946EX –55 — +125 °C
Thermal Impedance
Tjc — 6 — °C/Watt
Tca — 23 — °C/Watt
Storage Temperature Range –65 — +150 °C
Package Type 24-pin, metal-sealed, ceramic DDIP or SMT
Weight 0.42 ounces (12 grams)
ABSOLUTE MAXIMUM RATINGS
PARAMETERS LIMITS UNITS
+5V Supply (Pins 13, 22) 0 to +6 Volts
–5V Supply (Pin 20) 0 to –6 Volts
Digital Input (Pin 18) –0.3 to +VDD +0.3 Volts
Analog Input (Pin 21) ±5 Volts
Lead Temperature (10 seconds) +300 °C
+25°C 0 TO +70°C –55 TO +125°C
ANALOG INPUT MIN. TYP. MAX. MIN. TYP. MAX. MIN. TYP. MAX. UNITS
Input Voltage Range d — ±2 — — ±2 — — ±2 — Volts
Input Resistance — 200 — — 200 — — 200 — :
Input Capacitance — 6 15 — 6 15 — 6 15 pF
DIGITAL INPUT
Logic Levels
Logic "1" +2.0 — — +2.0 — — +2.0 — — Volts
Logic "0" — — +0.8 — — +0.8 — — +0.8 Volts
Logic Loading "1" — — +20 — — +20 — — +20 µA
Logic Loading "0" — — –20 — — –20 — — –20 µA
Start Convert Positive Pulse Width ➂ 10 20 — 10 20 — 10 20 — ns
STATIC PERFORMANCE
Resolution — 14 — — 14 — — 14 — Bits
Integral Nonlinearity (fi n = 10kHz) — ±0.75 — — ±0.75 — — ±1 — LSB
Differential Nonlinearity (fi n = 10kHz) –0.95 ±0.5 +1.25 –0.95 ±0.5 +1.25 –0.95 ±0.75 +1.5 LSB
Full Scale Absolute Accuracy — ±0.15 ±0.4 — ±0.15 ±0.4 — ±0.4 ±0.8 %FSR
Bipolar Zero Error (Tech Note 2) — ±0.2 ±0.4 — ±0.2 ±0.4 — ±0.4 ±0.65 %FSR
Gain Error (Tech Note 2) — ±0.2 ±0.75 — ±0.2 ±0.75 — ±0.4 ±1.25 %
No Missing Codes (fi n = 10kHz) 14 — — 14 — — 14 — — Bits
DYNAMIC PERFORMANCE
Peak Harmonics (–0.5dB)
dc to 500kHz — –76 –72 — –76 –72 — –74 –70 dB
500kHz to 1MHz — –75 –72 — –75 –72 — –74 –68 dB
1MHz to 4MHz — –75 –71 — –75 –71 — –69 –65 dB
Total Harmonic Distortion (–0.5dB)
dc to 500kHz — –75 –71 — –75 –71 — –74 –70 dB
500kHz to 1MHz — –75 –70 — –75 –70 — –72 –68 dB
1MHz to 4MHz — –75 –70 — –75 –70 — –69 –64 dB
Signal-to-Noise Ratio (w/o distortion, –0.5dB)
dc to 500kHz 73 77 — 73 77 — 72 76 — dB
500kHz to 1MHz 73 77 — 73 77 — 72 76 — dB
1MHz to 4MHz 73 77 — 73 77 — 71 76 — dB
Signal-to-Noise Ratio f (& distortion, –0.5dB)
dc to 500kHz 70 74 — 70 74 — 68 73 — dB
500kHz to 1MHz 69 73 — 69 73 — 65 70 — dB
1MHz to 4MHz 69 73 — 69 73 — 65 70 — dB
Noise — 150 — — 150 — — 150 — Vrms
Two-Tone Intermodulation Distortion
(fi n = 2.45MHz, 1.975MHz, fs = 8MHz, –0.5dB) — –82 — — –82 — — –82 — dB
Input Bandwidth (–3dB)
Small Signal (–20dB input) — 30 — — 30 — — 30 — MHz
Large Signal (–0.5dB input) — 10 — — 10 — — 10 — MHz
Feedthrough Rejection (fi n = 4MHz) — 85 — — 85 — — 85 — dB
Slew Rate — ±400 — — ±400 — — ±400 — V/s
Aperture Delay Time — +5 — — +5 — — +5 — ns
Aperture Uncertainty — 2 — — 2 — — 2 — ps rms
S/H Acquisition Time (to ±0.003%FSR, 4V step) — 55 60 — 55 60 — 55 60 ns
Overvoltage Recovery Time ➄ — 100 125 — 100 125 — 100 125 ns
A/D Conversion Rate 8 — — 8 — — 8 — — MHz
FUNCTIONAL SPECIFICATIONS
(TA = +25°C, ±VDD = ±5V, 8MHz sampling rate, and a minimum 3 minute warmup ➀ unless otherwise specifi ed.)
ADS-946
14-Bit, 8MHz Sampling A/D Converters
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
01 Apr 2011 MDA_ADS-946.B02 Page 2 of 8
TECHNICAL NOTES
Footnotes:
➀ All power supplies should be on before applying a start convert pulse. All supplies
and the clock (start convert pulses) must be present during warmup periods. The
device must be continuously converting during this time.
➁ Contact DATEL for other input voltage ranges.
➂ An 8MHz clock with a 20nsec positive pulse width is used for all production
testing. See Timing Diagram, Figure 4, for more details.
➃ Effective bits is equal to:
➄ This is the time required before the A/D output data is valid once the analog input
is back within the specifi ed range. This time is only guaranteed if the input does
not exceed ±2.2V (S/H saturation voltage).
➅ The minimum supply voltages of +4.9V and –4.9V for ±VDD are required for
–55°C operation only. The minimum limits are +4.75V and –4.75V when operating
at +125°C.
(SNR + Distortion) – 1.76 + 20 log Full Scale Amplitude
Actual Input Amplitude
6.02
1. Obtaining fully specifi ed performance from the ADS-946 requires care-
ful attention to pc card layout and power supply decoupling. The device’s
analog and digital ground systems are connected to each other internally.
For optimal performance, tie all ground pins (14, 19 and 24) directly to a
large analog ground plane beneath the package. Bypass all power supplies
to ground with 4.7F tantalum capacitors in parallel with 0.1F ceramic
capacitors. Locate the bypass capacitors as close to the unit as possible.
2. The ADS-946 achieves its specifi ed accuracies without the need for exter-
nal calibration. If required, the device’s small initial offset and gain errors
can be reduced to zero using the adjustment circuitry shown in Figures
2 and 3. When using this circuitry, or any similar offset and gain calibra-
tion hardware, make adjustments following warmup. To avoid interaction,
always adjust offset before gain.
3. Applying a start convert pulse while a conversion is in progress (EOC =
logic 1) will initiate a new and inaccurate conversion cycle. Data for the
interrupted and subsequent conversions will be invalid.
4. A passive bandpass fi lter is used at the input of the A/D for all production
testing.
+25°C 0 TO +70°C –55 TO +125°C
DIGITAL OUTPUTS MIN. TYP. MAX. MIN. TYP. MAX. MIN. TYP. MAX. UNITS
Logic Levels
Logic "1" +2.4 — — +2.4 — — +2.4 — — Volts
Logic "0" — — +0.4 — — +0.4 — — +0.4 Volts
Logic Loading "1" — — –4 — — –4 — — –4 mA
Logic Loading "0" — — +4 — — +4 — — +4 mA
Output Coding Offset Binary
POWER REQUIREMENTS
Power Supply Ranges ➅
+5V Supply +4.75 +5.0 +5.25 +4.75 +5.0 +5.25 +4.9 +5.0 +5.25 Volts
–5V Supply –4.75 –5.0 –5.25 –4.75 –5.0 –5.25 –4.9 –5.0 –5.25 Volts
Power Supply Currents
+5V Supply — +270 +290 — +270 +290 — +270 +290 mA
–5V Supply — –150 –170 — –150 –170 — –150 –170 mA
Power Dissipation — 2 2.3 — 2 2.3 — 2 2.3 Watts
Power Supply Rejection — — ±0.05 — — ±0.05 — — ±0.05 %FSR/%V
To Pin 21
of ADS-946
–5V
SIGNAL
INPUT
GAIN
ADJUST
1.98k:
50:
+5V
2k:
Figure 2. Optional ADS-946 Gain Adjust Calibration Circuit
ADS-946
14-Bit, 8MHz Sampling A/D Converters
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
01 Apr 2011 MDA_ADS-946.B02 Page 3 of 8
CALIBRATION PROCEDURE
Any offset and/or gain calibration procedures should not be implemented
until devices are fully warmed up. To avoid interaction, offset must be
adjusted before gain. The ranges of adjustment for the circuits in Figures
2 and 3 are guaranteed to compensate for the ADS-946's initial accuracy
errors and may not be able to compensate for additional system errors.
A/D converters are calibrated by positioning their digital outputs exactly
on the transition point between two adjacent digital output codes. This can
be accomplished by connecting LED’s to the digital outputs and adjusting
until certain LED's "fl icker" equally between on and off. Other approaches
employ digital comparators or microcontrollers to detect when the outputs
change from one code to the next.
Offset adjusting for the ADS-946 is normally accomplished at the point
where the MSB is a 1 and all other output bits are 0’s and the LSB just
changes from a 0 to a 1. This digital output transition ideally occurs when
the applied analog input is +½ LSB (+122V).
Gain adjusting is accomplished when all bits are 1's and the LSB just
changes from a 1 to a 0. This transition ideally occurs when the analog
input is at +full scale minus 1½ LSB's (+1.99963V).
Zero/Offset Adjust Procedure
1. Apply a train of pulses to the START CONVERT input (pin 18) so the con-
verter is continuously converting.
2. Apply +122V to the ANALOG INPUT (pin 21).
3. Adjust the offset potentiometer until the output bits are 10 0000 0000 0000
and the LSB fl ickers between 0 and 1.
Gain Adjust Procedure
1. Apply +1.99963V to the ANALOG INPUT (pin 21).
2. Adjust the gain potentiometer until all output bits are 1's and the LSB fl ick-
ers between 1 and 0.
3. To confi rm proper operation of the device, vary the input signal to obtain
the output coding listed in Table 2.
0.1F0.1F
4.7F 4.7F
22, 13
24
2019
ADS-946
–5V
20k:
0.1F
4.7F
+5V
14
–5V
+5V
21
23
18
1
2
3
4
5
6
7
8
9
10
11
12
15
16
17
BIT 1 (MSB)
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
BIT 10
BIT 11
BIT 12
BIT 13
BIT 14 (LSB)
EOC
ANALOG
INPUT
START
CONVERT
A single +5V supply should be used for both the +5V analog and +5V digital.
If se
p
arate su
pp
lies are used, the difference between the two cannot exceed 100mV.
~
~
+ + +
ZERO/
OFFSET
ADJUST
Figure 3. Typical ADS-946 Connection Diagram
Table 2. Output Coding for Bipolar Operation
BIPOLAR
SCALE
INPUT RANGE
(±2V RANGE)
OFFSET BINARY
MSB LSB
+FS –1 LSB +1.99976 11 1111 1111 1111
+3/4 FS +1.50000 11 1000 0000 0000
+1/2 FS +1.00000 11 0000 0000 0000
0 0.00000 10 0000 0000 0000
–1/2 FS –1.00000 01 0000 0000 0000
–3/4 FS –1.50000 00 1000 0000 0000
–FS +1 LSB –1.99976 00 0000 0000 0001
–FS –2.00000 00 0000 0000 0000
Table 1. Gain and Zero Adjust
INPUT VOLTAGE
RANGE
ZERO ADJUST
+½ LSB
GAIN ADJUST
+FS –1½ LSB
±2V +122V +1.99963V
ADS-946
14-Bit, 8MHz Sampling A/D Converters
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
01 Apr 2011 MDA_ADS-946.B02 Page 4 of 8
THERMAL REQUIREMENTS
All DATEL sampling A/D converters are fully characterized and specifi ed over
operating temperature (case) ranges of 0 to +70°C and –55 to +125°C. All
room-temperature (TA = +25°C) production testing is performed without the
use of heat sinks or forced-air cooling. Thermal impedance fi gures for each
device are listed in their respective specifi cation tables.
These devices do not normally require heat sinks, however, standard precau-
tionary design and layout procedures should be used to ensure devices do not
overheat. The ground and power planes beneath the package, as well as all
pcb signal runs to and from the device, should be as heavy as possible to help
conduct heat away from the package.
Electrically-insulating, thermally-conductive "pads" may be installed under-
neath the package. Devices should be soldered to boards rather than socketed,
and of course, minimal air fl ow over the surface can greatly help reduce the
package temperature.
Figure 4. ADS-946 Timing Diagram
Notes:
1. Scale is approximately 5ns per division. Sampling rate = 8MHz.
2. The start convert positive pulse width must be between 10 and 50ns or between 80 and 110ns (when sampling at 8MHz)
to ensure proper operation. For sampling rates less than 8MHz, the start pulse can be wider than 110nsec, however a
minimum pulse width low of 15nsec should be maintained. An 8MHz clock with a 20nsec positive pulse width is used
for all production testing.
START
CONVERT
INTERNAL S/H
NN+1
20ns
typ.
25ns typ.
Acquisition Time
55ns typ.
60ns max.
Hold
10ns typ.
EOC
20ns typ.
Conversion Time
78ns min., 85ns typ., 90ns max.
OUTPUT
DATA Data N-1 Valid Data N Valid
30ns typ.
Invalid Data
95ns typ.
70ns typ.
10ns typ.
ADS-946
14-Bit, 8MHz Sampling A/D Converters
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
01 Apr 2011 MDA_ADS-946.B02 Page 5 of 8
Figure 5. FFT Analysis of ADS-946
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
–140
–150
Amplitude Relative to Full Scale (dB)
Frequency
(fs = 8MHz, fin = 3.85MHz, Vin = –0.5dB, 16,384-point FFT)
0 400 800 1.2 1.6 2.0 2.4 2.8 3.2 3.6 4.0
kHz kHz MHz MHz MHz MHz MHz MHz MHz MHz
Figure 6. ADS-946 Histogram and Differential Nonlinearity
DNL (LSB's)
Codes
0 16,384
–0.57
+0.81
016,384
Digital Output Code
Number of Occurrences
ADS-946
14-Bit, 8MHz Sampling A/D Converters
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
01 Apr 2011 MDA_ADS-946.B02 Page 6 of 8
Figure 7. ADS-946 Evaluation Board Schematic (ADS-B946)
GND
Q
CLR
CK
D
PR
+5VF
+5VA
+15V
–15V
-15V
+15V
–5VA
+5V
–5V
+5VF
-15V
-5VA
OPTION
+5VF
Q
PR
D
CK
CLR
+5VF
+5VF
+5VF
+5V
–5V
+5VA
BIT12
BIT11
BIT10
BIT9
BIT8
BIT7
BIT6
BIT5
BIT4
BIT3
BIT2
BIT1
ADS-946
+5VD
DGND
BIT13
BIT14
EOC
TRIG
AGND
-5V
AIN
+5VA
OFFSET
AGND
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
8D
7D
6D
5D
4D
3D
2D
1D
+
+
+
+
+
+
+
–
+5VA+15V
+
+
+
+
+
C15
U6
P2
SG10
SG3
SG2
SG1
C14
C7
C13
C6
C12C5
L7
L6
R1
C20
C4 C11
L5
L4
L3
C3 C10
C2 C9
L2
C8C1
L1
P4
C19
SG8
SG7
U4
R2
C18
SG5 SG6
SG4
R3
C26 C27 C25
SG9
C24
C23
C16
C22
C17
C21
X1
U6
P3
JPR1
U5
P1
JPR2
U5
U1
U3
OFFSET
ADJUST
ANA. IN
IN
ANA.
CLC402
HI2541
ANA. IN
START CONVERT
7
8
14
CONV.
START
74HCT86
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
TRIG
74HCT86
74HCT573
74HCT573
74HCT86
HCT7474
20H
20H
20k
20H
20H
20H
20H
20H
HCT7474
8MHz
CRYSTAL
15pF
3.2k
2.2F
4
5
6
13
12 14
11
7
9
8
13
11
12
10
26
24
22
25
23
21
19
17
15
13
11
9
7
5
3
1
20
18
16
14
12
10
8
6
4
2
2
5
411
10
14
5
6
4
2
3
1
7
231
2
13
33
31
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
29
27
25
23
21
19
17
15
13
11
9
7
5
3
1
23
1
9
10
8
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
10
1
12
13
14
15
16
17
18
19
20
2
3
4
5
6
7
8
9
11
SPARE GATES
C1 - C7 ARE 20V.
2. CLOSE SG1-SG3, SG9, SG10.
ALL RESISTORS ARE IN OHMS.
1. UNLESS OTHERWISE SPECIFIED ALL CAPACITORS ARE 50V.
NOTES:
OE
CE
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
8D
7D
6D
5D
4D
3D
2D
1D
U2
10
12
13
14
15
16
17
18
19
20
2
3
4
5
6
7
8
9
11 OE
CE 1
CE
0.1F
0.1F
0.1F
0.1F
0.1F
2.2F
0.1F
2.2F
2.2F
0.1F
2.2F
2.2F
2.2F
2.2F
2.2F
2.2F
2.2F
6
+5VF
(Optional) (Optional)
(Optional)
(Optional)
0.01F
0.01F
0.01F
0.01F
0.01F
0.01F
0.01F
0.1F
U5
U5
Q
3. SEE DATEL DWG A-24546 FOR ADDITIONAL INFORMATION
ON ADS-B946 EVALUATION BOARD.
ADS-946
14-Bit, 8MHz Sampling A/D Converters
®®
DATEL • 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA • Tel: (508) 339-3000 • www.datel.com • e-mail: help@datel.com
01 Apr 2011 MDA_ADS-946.B02 Page 7 of 8
MECHANICAL DIMENSIONS INCHES (mm)
24-Pin DDIP
Versions
ADS-946MC
ADS-946MM
ADS-946/883
24-Pin
Surface Mount
Versions
ADS-946GC
ADS-946GM
ADS-946G/883
0.200 MAX.
(5.080)
0.235 MAX.
(5.969)
0.600 ±0.010
(15.240)
0.80 MAX.
(20.32)
0.100 TYP.
(2.540)
0.100
(2.540)
0.018 ±0.002
(0.457)
0.100
(2.540)
0.040
(1.016)
1.31 MAX.
(33.27)
112
13
24
1.100
(27.940)
0.190 MAX.
(4.826)
0.010
(0.254)
+0.002
–0.001
SEATING
PLANE
0.025
(0.635)
Dimension Tolerances
(unless otherwise indicated):
2 place decimal (.XX) ±0.010 (±0.254)
3 place decimal (.XXX) ±0.005 (±0.127)
Lead Material: Kovar alloy
Lead Finish: 50 microinches (minimum)
gold plating over 100 microinches
(nominal) nickel plating
0.80 MAX.
(20.32)
0.015
(0.381)
MAX. radius
for any pin
1.31 MAX.
(33.02)
0.100 TYP.
(2.540)
0.100
(2.540)
0.190 MAX.
(4.826)
0.040
(1.016)
0.020 TYP.
(0.508)
0.020
(0.508)
24 13
121
PIN 1
INDEX
0.130 TYP.
(3.302)
Dimension Tolerances (unless otherwise indicated):
2 place decimal (.XX) ±0.010 (±0.254)
3 place decimal (.XXX) ±0.005 (±0.127)
Lead Material: Kovar alloy
Lead Finish: 50 microinches (minimum) gold plating
over 100 microinches (nominal) nickel plating
0.060 TYP.
(1.524)
0.010 TYP.
(0.254)
ORDERING INFORMATION
MODEL NUMBER OPERATING
TEMP. RANGE
24-PIN
PACKAGE ACCESSORIES
ADS-946MC 0 to +70°C DDIP ADS-B946 Evaluation Board (without ADS-946)
ADS-946MM –55 to +125°C DDIP HS-24 Heat Sink for all ADS-946 DDIP models
ADS-946/883 –55 to +125°C DDIP Receptacles for pc board mounting can be ordered through AMP,
Inc., Part # 3-331272-8 (Component Lead Socket), 24 required.
For MIL-STD-883 product specifcation, contact DATEL.
ADS-946GC 0 to +70°C SMT
ADS-946GM –55 to +125°C SMT
ADS-946G/883 –55 to +125°C SMT
ADS-946
14-Bit, 8MHz Sampling A/D Converters
. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not
imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change
without notice.
www.datel.com • e-mail: help@datel.com
®®
DATEL
11 Cabot Boulevard, Mansfi eld, MA 02048-1151 USA
ITAR and ISO 9001/14001 REGISTERED
01 Apr 2011 MDA_ADS-946.B02 Page 8 of 8