THALER VRE305KD, VRE305JS, VRE305JD, VRE305CS, VRE305CD Datasheet

VRE305
Low Cost
Precision Reference

THALER CORPORATION • 2015 N. FORBES BOULEVARD • TUCSON, AZ. 85745 • [phone]

FEATURES

• 5.000 V OUTPUT ± 0.500 mV (.01%)

PIN CONFIGURATION

• TEMPERATURE DRIFT: 0.6 ppm/°C

NOISE

µV

• LOW NOISE: 3

(0.1-10Hz)

p-p

• INDUSTRY STD PINOUT- 8 PIN DIP OR

SURFACE MOUNT PACKAGE

•EXCELLENT LINE REGULATION: 6ppm/V Typ.

N/C

+V

IN

TEMP

GND

1

2

3

4

VRE305

TOP

VIEW

8

7

6

5

REDUCTION

REF. GND

V

OUT

TRIM

• OUTPUT TRIM CAPABILITY

DESCRIPTION

The VRE305 is a low cost, high precision 5.0V
reference. Packaged in the industry standard 8
pin DIP, the device is ideal for upgrading systems
that use lower performance references.

The device provides ultrastable +5.000V output
with ±0.5000 mV (.01%) initial accuracy and a
temperature coefficient of 0.6 ppm/°C. This
improvement in accuracy is made possible by a
unique, patented multipoint laser compensation
technique developed by Thaler Corporation.
Significant improvements have been made in
other performance parameters as well, including
initial accuracy, warm-up drift, line regulation, and
long-term stability, making the VRE305 series the
most accurate reference available in the standard
8 pin DIP package.

For enhanced performance, the VRE305 has an
external trim option for users who want less than

0.01% initial error. For ultra low noise
applications, an external capacitor can be
attached between the noise reduction pin and the
ground pin. A reference ground pin is provided to
eliminate socket contact resistance errors.

FIGURE 1

The VRE305 is recommended for use as a
reference for 14, 16, or 18 bit D/A converters
which require an external precision reference.
The device is also ideal for calibrating scale factor
on high resolution A/D converters. The VRE305
offers superior performance over monolithic
references.

SELECTION GUIDE

Initial

Error

Model

VRE305A 0.5 0.6 0°C to +70°C
VRE305B 0.8 1.0 0°C to +70°C
VRE305C 1.0 2.0 0°C to +70°C
VRE305J 0.5 0.6 -40°C to +85°C
VRE305K 0.8 1.0 -40°C to +85°C
VRE305L 1.0 2.0 -40°C to +85°C

For package option add D for DIP or S for Surface Mount
to end of model number.

mV

Temp.

Coeff.

ppm/°C

Temp.
Range

°C

VRE305DS REV. D MAY 2001

ELECTRICAL SPECIFICATIONS

Vps =+15V, T = 25°C, RL = 10kΩ unless otherwise noted.

MODEL A/J B/K C/L

VRE305

PARAMETER

MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS

ABSOLUTE RATINGS

Power Supply +13.5+15+22****** V
Operating Temp. (
Operating Temp. (

A,B,C)0 +70 * * * * °C
J,K,L)-40 +85 * * * * °C

Storage Temperature -65 +150 * * * * °C
Short Circuit Protection Continuous * *

OUTPUT VOLTAGE

VRE305 5.000 * * V

(1)

Temp. Sensor Voltage 630 * * mV

OUTPUT VOLTAGE ERRORS

Initial Error 0.50 0.80 1.00 mV

(2)

Warmup Drift 1 2 3 ppm
T

min-Tmax

(3)

0.6 1.0 2.0 ppm/°C
Long-Term Stability 6 * * ppm/1000hrs
Noise (.1-10Hz) 3 * * µVpp

(4)

OUTPUT CURRENT

Range ±10 * * mA

REGULATION

Line 6 10 * * * * ppm/V
Load 3 * * ppm/mA

OUTPUT ADJUSTMENT

Range 10 * * mV

POWER SUPPLY CURRENTS

(5)

VRE305 +PS 5 7 * * * * mA

NOTES: *Same as A/J Models.

1. The temp. reference TC is 2.1mV/°C

2. The specified values are without external trim.

4. The specified values are without the external
noise reduction capacitor.

5. The specified values are unloaded.

3. The temperature coefficient is determined by the box
method using the following formula:

V

max-Vmin

T.C. = x 10

V

nominal

x (T

max-Tmin

)

6

VRE305DS REV. D MAY 2001