ANALOG DEVICES ADR512W Service Manual
1.2 V Precision Low Noise
ADR512W
NC = NO CONNECT. DO NOT
CONNECT TO THIS PIN.
09938-001
V+
1
V–
2
TRIM/NC
3
ADR512W
TOP VIEW
(Not to Scale)
09938-002
AD512W
V
OUT
= 1.2V
I
Q
IL + I
Q
R
BIAS
V
S
I
L
C
OUT
(OPTIONAL)
R
BIAS
=
V
S
– V
OUT
IL + I
Q
FEATURES
Precision 1.200 V voltage reference
Ultracompact 3-lead SOT-23 package
No external capacitor required
Low output noise: 4 µV p-p (0.1 Hz to 10 Hz)
Initial accuracy: ±0.67% maximum
Temperature coefficient: 60 ppm/°C maximum
Operating current range: 100 µA to 10 mA
Output impedance: 0.3 Ω maximum
Temperature range: −40°C to +85°C
Qualified for automotive applications
APPLICATIONS
Automotive systems
Precision data acquisition systems
Microcontroller reference voltage
GENERAL DESCRIPTION
Designed for space critical applications, the ADR512W is a low
voltage (1.200 V), precision shunt-mode voltage reference in the
ultracompact SOT-23 package. The ADR512W features low
temperature drift (60 ppm/°C), high accuracy (±0.67%), and
ultralow noise (4 µV p-p) performance.
The ADR512W’s advanced design eliminates the need for an
external capacitor, yet it is stable with any capacitive load. The
Shunt Voltage Reference
PIN CONFIGURATION
Figure 1. 3-Lead SOT-23
minimum operating current increases from a scant 100 µA to a
maximum of 10 mA.
A TRIM terminal is available on the ADR512W to provide
adjustment of the output voltage over ±0.5% without affecting
the temperature coefficient of the device. This feature provides
users with the flexibility to trim out any system errors.
Rev. 0
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Figure 2. Typical Operating Circuit
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