VRE410JS-8 - Cirrus Logic, Inc.

P r o d u c t I n n o v a t i o n F r o m VRE410

VRE410DS 1

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 ±1.0

mV (.01%) initial accuracy and a temperature coef-

cient of 0.6 ppm/°C. This improvement in accuracy is

made possible by a unique, patented multipoint laser

compensation technique.

Another key feature of this reference is the 0.5 mV

maximum tracking error between the positive and neg-

ative output voltages over the full operating tempera-

ture range. This is extremely important in high perfor-

mance systems for reducing overall system errors.

FEATURES

♦ ±10 V Output, ± 1.0 mV (.01%)

♦ Temperature Drift: 0.6 ppm/ºC

♦ Low Noise: 6 μVP-P (0.1-10Hz)

♦ Tracking Error: 0.5 mV Max.

♦ 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

P r o d u c t I n n o v a t i o n F r o m

Figure 1. BLOCK DIAGRAM

http://www.cirrus.com

MAR 2009

APEX − VRE410DSREVB

Model

Initial Error

(mV)

Temp. Coeff.

(ppm/ºC)

Temp. Range

(ºC)

VRE410A

VRE410B

VRE410C

VRE410J

VRE410L

±1.0

±1.6

±2.0

±1.0

±2.0

0.6

1.0

2.0

0.6

2.0

0ºC to +70ºC

-40ºC to +85ºC

SELECTION GUIDE

14-pin Surface Mount

Package Style GE

P r o d u c t I n n o v a t i o n F r o m

VRE410

2 VRE410DS

4. The tracking error is the deviation between the

positive and negative output over the operating

temp. range.

5. The specied values are unloaded.

1. CHARACTERISTICS AND SPECIFICATIONS

ELECTRICAL SPECIFICATIONS

VPS =±15V, T = +25ºC, RL = 10KΩ Unless Otherwise Noted.

Model A/J B C/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,C) 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) ±1.00 ±1.60 ±2.00 mV

Warmup Drift 1 2 3 ppm

TMIN - TMAX (Note 2) 0.6 1.0 2.0 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 10 * * * * ppm/V

Load 3 * * ppm/mA

POWER SUPPLY CURRENT (Note 4)

+PS 79 * * * * mA

-PS 4 6 * * * * 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:

VNOMINAL x (TMAX – TMIN)

VMAX – VMIN

T.C. = x 106

P r o d u c t I n n o v a t i o n F r o m VRE410

VRE410DS 3

2. TYPICAL PERFORMANCE CURVES

Temperature

VRE410A

OUT

vs. TEMPERATURE

Temperature

VRE410B

OUT

vs. TEMPERATURE

OUT

vs. TEMPERATURE

Temperature

VRE410C

Temperature

VRE410J

OUT

vs. TEMPERATURE

Temperature

VRE410L

OUT

vs. TEMPERATURE

QUIESCENT CURRENT VS. TEMP

Temperature

JUNCTION TEMP. RISE VS. OUTPUT CURRENT

Output Current (mA)

PSRR VS. FREQUENCY

Frequency (Hz)

QUIESCENT CURRENT VS. TEMP

Temperature

JUNCTION TEMP. RISE VS. OUTPUT CURRENT

Output Current (mA)

PSRR VS. FREQUENCY

Frequency (Hz)

POSITIVE OUTPUT (TYP)

NEGATIVE OUTPUT (TYP)

P r o d u c t I n n o v a t i o n F r o m

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 ref-

erences 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 con-

necting 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.

PIN CONFIGURATION

VRE410

TOP

VIEW

N/C

+VIN

GND

REF. GND

+VOUT

-VOUT

N/C

-VIN

N/C

P r o d u c t I n n o v a t i o n F r o m VRE410

VRE410DS 5

CONTACTING CIRRUS LOGIC SUPPORT

For all Apex Precision Power product questions and inquiries, call toll free 800-546-2739 in North America.

For inquiries via email, please contact tucson.support@cirrus.com.

International customers can also request support by contacting their local Cirrus Logic Sales Representative.

To nd the one nearest to you, go to www.cirrus.com

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