VRE410
VRE410DS 1
VRE410
DESCRIPTION
The VRE410 is a low cost, high precision, ±10 V refer-
ence. Available in a 14-pin SMT package, the device
is ideal for new designs that need a high performance
reference.
The device provides ultrastable ±10 V output with ±1.6
mV initial accuracy and a temperature coefcient of
1.0 ppm/°C. This improvement in accuracy is made
possible by a unique, patented multipoint laser com-
pensation technique.
Another key feature of this reference is the 0.5 mV
tracking error between the positive and negative out-
put voltages over the full operating temperature range.
This is extremely important in high performance sys-
tems for reducing overall system errors.
FEATURES
♦ ±10 V Output, ± 1.6 mV
♦ Temperature Drift: 1.0 ppm/ºC
♦ Low Noise: 6 μVP-P (0.1-10Hz)
♦ Tracking Error: 0.3 mV
♦ Excellent Line Regulation: 6 ppm/V Typical
♦ Surface Mount Package
APPLICATIONS
The VRE410 is recommended for use as a refer-
ence for high precision D/A and A/D converters
which require an external precision reference.
The device is also ideal for calibrating scale factor
on high resolution A/D converters. The VRE410
offers superior performance over monolithic refer-
ences.
Precision Dual Voltage Reference
VRE410
Figure 1. BLOCK DIAGRAM
Model
Initial Error
(mV)
Temp. Coeff.
(ppm/ºC)
Temp. Range
(ºC)
VRE410AS
VRE410BS
VRE410JS
VRE410LS
±1.6
±2.0
±1.6
±2.2
1.0
2.0
1.0
2.2
0ºC to +70ºC
0ºC to +70ºC
-40ºC to +85ºC
-40ºC to +85ºC
SELECTION GUIDE
14-pin Surface Mount
Package Style GE
Copyright © Apex Microtechnology, Inc. 2012
(All Rights Reserved)
www.apexanalog.com SEP 2012
VRE410DS REVH
VRE410
2 VRE410DS
1. CHARACTERISTICS AND SPECIFICATIONS
ELECTRICAL SPECIFICATIONS
VPS =±15V, T = +25ºC, RL = 10KΩ Unless Otherwise Noted.
Model A/J B L
Parameter Min Typ Max Min Typ Max Min Typ Max Units
ABSOLUTE RATINGS
Power Supply ±13.5 ±15 ±22 * * * * * * V
Operating Temperature (A,B) 0 +70 * * * * ºC
Operating Temperature (J,L) -40 +85 * * * * ºC
Storage Temperature -65 +150 * * * * ºC
Short Circuit Protection Continuous * *
OUTPUT VOLTAGE
VRE410 ±10.0 * * V
OUTPUT VOLTAGE ERRORS
Initial Error (Note 1) ±1.60 ±2.00 ±2.20 mV
Warmup Drift 1 2 3 ppm
TMIN - TMAX (Note 2) 1.0 2.0 2.2 ppm/ºC
Tracking Error (Note 3) 0.5 0.7 1.0 mV
Long-Term Stability 6 * * ppm/1000hrs.
Noise (0.1 - 10Hz) 6 * * µVpp
OUTPUT CURRENT
Range ±10 * mA
REGULATION
Line 3 * * ppm/V
Load 3 * * ppm/mA
POWER SUPPLY CURRENT (Note 4)
+PS 7 * * mA
-PS 4 * * mA
NOTES:
* Same as A/J Models.
1. The specied values are without external trim.
2. The temperature coefcient (TC) is determined by the box method using the following formula:
3. The tracking error is the deviation between the positive and negative output over the operating temp.
range.
4. The specied values are unloaded.
VNOMINAL x (TMAX – TMIN)
VMAX – VMIN
T.C. = x 106
VRE410
VRE410DS 3
2. TYPICAL PERFORMANCE CURVES
QUIESCENT CURRENT VS. TEMP
Temperature
o
C
JUNCTION TEMP. RISE VS. OUTPUT CURRENT
Output Current (mA)
PSRR VS. FREQUENCY
Frequency (Hz)
QUIESCENT CURRENT VS. TEMP
Temperature
o
C
JUNCTION TEMP. RISE VS. OUTPUT CURRENT
Output Current (mA)
PSRR VS. FREQUENCY
Frequency (Hz)
POSITIVE OUTPUT (TYP)
NEGATIVE OUTPUT (TYP)
Upper Limit
Lower Limit
Temperature, °C
VRE410AS
10 7060504030200
∆V
OUT
(mV)
-1.5
2
1.5
1
0.5
0
-0.5
-1
-2
V
OUT
vs. TEMPERATURE
Upper Limit
Lower Limit
Temperature, °C
VRE410BS
10 7060504030200
∆V
OUT
(mV)
-1.5
2
1.5
1
0.5
0
-0.5
-1
-2
V
OUT
vs. TEMPERATURE
Upper Limit
Lower Limit
Temperature, °C
VRE410JS
-15 85603510-40
∆V
OUT
(mV)
-3
4
3
2
1
0
-1
-2
-4
V
OUT
vs. TEMPERATURE
Upper Limit
Lower Limit
Temperature, °C
VRE410LS
-15 85603510-40
∆V
OUT
(mV)
-3
4
3
2
1
0
-1
-2
-4
V
OUT
vs. TEMPERATURE
VRE410
4 VRE410DS
3. THEORY OF OPERATION
The following discussion refers to the block diagram in Figure 1. In operation, approximately 6.3 V is applied to
the noninverting input of the op amp. The voltage is amplied by the op amp to produce a 10 V output. The gain is
determined by the networks R1 and R2: G=1 + R2/R1. The 6.3 V zener diode is used because it is the most stable
diode over time and temperature.
The zener operating current is derived from the regulated output voltage through R3. This feedback arrangement
provides a closely regulated zener current. This current determines the slope of the references’ voltage vs. tempera-
ture function. By trimming the zener current a lower drift over temperature can be achieved. But since the voltage
vs. temperature function is nonlinear this compensation technique is not well suited for wide temperature ranges.
A nonlinear compensation network of thermistors and resistors is used in the VRE series voltage references. This
proprietary network eliminates most of the nonlinearity in the voltage vs. temperature function. By then adjusting the
slope, a very stable voltage is produced over wide temperature ranges.
The VRE400 series voltage references have the ground terminal brought
out on two pins (pin 6 and 7) which are connected together internally.
This allows the user to achieve greater accuracy when using a socket.
Voltage references have a voltage drop across their power supply ground
pin due to quiescent current owing through the contact resistance. If the
contact resistance was constant with time and temperature, this voltage
drop could be trimmed out. When the reference is plugged into a socket,
this source of error can be as high as 20 ppm. By connecting pin 7 to
the power supply ground and pin 6 to a high impedance ground point in
the measurement circuit, the error due to the contact resistance can be
eliminated. If the unit is soldered into place the contact resistance is suf-
ciently small that it doesn’t effect performance.
4. POWER SUPPLY SEQUENCING
Do not operate the VRE410 with only one power supply terminal connected. This device requires the positive power
supply voltage to lead the negative power supply voltage. The positive power supply must be applied prior to the
negative power supply.
11
12
13
14
VRE410
TOP
VIEW
1
2
3
4
N/C
+VIN
GND
REF. GND
+VOUT
5
6
7
10
9
8
-VOUT
N/C
-VIN
N/C
N/C
N/C
N/C
N/C
N/C
PIN CONFIGURATION
NEED TECHNICAL HELP? CONTACT APEX SUPPORT!
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For inquiries via email, please contact apex.support@apexanalog.com.
International customers can also request support by contacting their local Apex Microtechnology Sales Representative.
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IMPORTANT NOTICE
Apex Microtechnology, Inc. has made every effort to insure the accuracy of the content contained in this document. However, the information is subject to change
without notice and is provided "AS IS" without warranty of any kind (expressed or implied). Apex Microtechnology reserves the right to make changes without further
notice to any specications or products mentioned herein to improve reliability. This document is the property of Apex Microtechnology and by furnishing this informa-
tion, Apex Microtechnology grants no license, expressed or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual
property rights. Apex Microtechnology owns the copyrights associated with the information contained herein and gives consent for copies to be made of the informa-
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APEX MICROTECHNOLOGY PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED TO BE SUITABLE FOR USE IN PRODUCTS USED FOR
LIFE SUPPORT, AUTOMOTIVE SAFETY, SECURITY DEVICES, OR OTHER CRITICAL APPLICATIONS. PRODUCTS IN SUCH APPLICATIONS ARE UNDER-
STOOD TO BE FULLY AT THE CUSTOMER OR THE CUSTOMER’S RISK.
Apex Microtechnology, Apex and Apex Precision Power are trademarks of Apex Microtechnolgy, Inc. All other corporate names noted herein may be trademarks
of their respective holders.
Copyright © Apex Microtechnology, Inc. 2012
(All Rights Reserved)
www.apexanalog.com SEP 2012
VRE410DS REVH