Data Sheet
FEATURES
Precision 1.200 V Voltage Reference
Ultracompact 3 mm × 3 mm SOT-23 Package
No External Capacitor Required
Low Output Noise: 4 µV p-p (0.1 Hz to 10 Hz)
Initial Accuracy: ±0.3% Max
Temperature Coefficient: 60 ppm/°C Max
Operating Current Range: 100 µA to 10 mA
Output Impedance: 0.3 Ω Max
Temperature Range: −40°C to +85°C
1.2 V Precision Low Noise
Shunt Voltage Reference
ADR512
PIN CONFIGURATION
ADR512
V+
1
3
TRIM/NC
V–
2
TOP VIEW
(Not to Scale)
03700-001
NC = NO CONNECT. DO NOT
CONNECT TO THIS PIN.
Figure 1. 3-Lead SOT-23
Table 1.
Model
ADR512ARTZ-REEL7
Output
Voltage (V
O
)
1.200
Initial
Accuracy
(mV)
(%)
3.5
0.3
Temperature
Coefficient
(ppm/°C)
60
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 × 3 mm) SOT-23 package. The ADR512
features low temperature drift (60 ppm/°C), high accuracy
(±0.30%), and ultralow noise (4 µV 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 µA to a
V
S
I
L
+ I
Q
maximum of 10 mA. This low operating current and ease of use
make the ADR512 ideally suited for handheld battery-powered
applications.
A TRIM terminal is available on the ADR512 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.
R
BIAS
I
L
V
OUT
= 1.2V
C
OUT
(OPTIONAL)
R
BIAS
=
V
S
– V
OUT
I
L
+ I
Q
03700-002
ADR512
I
Q
Figure 2. Typical Operating Circuit
Rev. A
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