VRE505K CIRRUS [Cirrus Logic], VRE505K Datasheet

VRE505K

Manufacturer Part Number

VRE505K

Description

Precision Voltage Reference

Manufacturer

CIRRUS [Cirrus Logic]

Datasheet

1.VRE505K.pdf (4 pages)

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FEatuRES

♦ +5 V Output, ± 1.0 mV (.02%)

♦ Temperature Drift: 1 ppm/ºC

♦ Low Noise: 3 μV

♦ Industry Standard Pinout: 8-pin Surface Mount

♦ Excellent Line Regulation: 6 ppm/V Typ.

♦ Output Trim Capability

DESCRIPtION

The VRE505 is a low cost, high precision +5 V refer-

ence. The device is ideal for upgrading systems that

use lower performance references.

The device provides ultrastable +5 V output with ±0.5

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

cient of 0.6 ppm/ºC. This improvement in accuracy is

made possible by a unique, patented multipoint laser

SELECtION GuIDE

VRE505DS

VRE505K

Package

Model

http://www.cirrus.com

Initial Error

(mV)

±1.0

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

P-P

(0.1-10 Hz)

temp. Coeff.

Precision Voltage Reference

(ppm/ºC)

2.0

Figure 1. BLOCK DIaGRaM

-40ºC to +85ºC

temp. Range

(ºC)

compensation technique. Significant improvements

have been made in other performance parameters as

well, including initial accuracy, warm-up drift, line regu-

lation, and long-term stability, making the VRE505 the

most accurate reference available.

For enhanced performance, the VRE505 has an exter-

nal trim option for users who want less than 0.01% ini-

tial error. For ultra low noise applications, an external

capacitor can be attached between the noise reduc-

tion pin and the ground pin. A reference ground pin is

provided to eliminate socket contact resistance errors.

The VRE505 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 con-

verters. The VRE505 offers superior performance over

monolithic references.

8-pin Surface Mount

Package Style GF

aPEX - VRE505DSREVC

VRE505

auG 2009

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VRE505K Summary of contents

Page 1

... This improvement in accuracy is made possible by a unique, patented multipoint laser SELECtION GuIDE Initial Error temp. Coeff. Model (mV) (ppm/ºC) VRE505K ±1.0 2.0 VRE505DS http://www.cirrus.com compensation technique. Significant improvements have been made in other performance parameters as well, including initial accuracy, warm-up drift, line regu- lation, and long-term stability, making the VRE505 the most accurate reference available ...

Page 2

VRE505 1. ChaRaCtERIStICS aND SPECIFICatIONS ELECtRICaL SPECIFICatIONS V = +15V +25º 10KΩ Unless Otherwise Noted Parameter aBSOLutE RatINGS Power Supply Operating Temperature Storage Temperature Short Circuit Protection OutPut VOLtaGE VRE505 Temperature Sensor Voltage OutPut ...

Page 3

... This network is less than 2% of the overall network resistance so it has a negligible effect on long term stability. VRE505DS V vs. TEMPERATURE OUT Temperature o C VRE505K JUNCTION TEMP. RISE VS. OUTPUT CURRENT Output Current (mA) VRE505 PSRR VS. FREQUENCY Frequency (Hz) 3 ...

Page 4

VRE505 The proper connection of the VRE505 series voltage references with the optional trim resistor for initial error and the optional capacitor for noise reduction is shown below. The VRE505 reference has the ground terminal brought out on two pins ...

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