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ADR512
1.2 V Precision Low Noise
Shunt Voltage Reference
FEATURES
Precision 1.200 V Voltage Reference
Ultracompact 3 mm H11547 3 mm SOT-23 Package
No External Capacitor Required
Low Output Noise: 4 H9262V p-p (0.1 Hz to 10 Hz)
Initial Accuracy: H115500.3% Max
Temperature Coefficient: 60 ppm/H11543C Max
Operating Current Range: 100 H9262A to 10 mA
Output Impedance: 0.3 H9024 Max
Temperature Range: –40H11543C to +85H11543C
APPLICATIONS
Precision Data Acquisition Systems
Battery-Powered Equipment:
Cellular Phone, Notebook Computer, PDA,
and GPS
3 V/5 V, 8-/12-Bit Data Converters
Portable Medical Instruments
Industrial Process Control Systems
Precision Instruments
GENERAL DESCRIPTION
Designed for space critical applications, the ADR512 is a low
voltage (1.200 V), precision shunt-mode voltage reference in the
ultracompact (3 mm H11003 3 mm) SOT-23 package. The ADR512
features low temperature drift (60 ppm/H11034C), high accuracy
(H110060.30%), and ultralow noise (4 H9262V p-p) performance.
The ADR512’s advanced design eliminates the need for an
external capacitor, yet it is stable with any capacitive load. The
minimum operating current increases from a scant 100 H9262A to a
maximum of 10 mA. This low operating current and ease of use
make the ADR512 ideally suited for handheld battery-powered
applications.
PIN CONFIGURATION
3-Lead SOT-23
1
3
2
V
+
V
–
ADR512
TRIM/NC
A TRIM terminal is available on the ADR512 to provide adjust-
ment of the output voltage over H110060.5% without affecting the
temperature coefficient of the device. This feature provides
users with the flexibility to trim out any system errors.
V
S
R
BIAS
I
Q
I
L
V
OUT
= 1.2V
C
OUT
(OPTIONAL)
I
L
+ I
Q
V
S
– V
OUT
I
L
+ I
Q
R
BIAS
=
ADR512
Figure 1. Typical Operating Circuit
ADR512
Output Initial Temperature
Voltage Accuracy Coefficient
Model (V
O
) (mV) (%) (ppm/H11543C)
ADR512ART-REEL7 1.200 3.5 0.3 60