1.0 V Precision Low Noise
Shunt Voltage Reference
ADR510
Rev. B
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FEATURES
Precision 1.000 V voltage reference
Ultracompact 3 mm × 3 mm SOT-23 package
No external capacitor required
Low output noise: 4 V p-p (0.1 Hz to 10 Hz)
Initial accuracy: ±0.35% maximum
Temperature coefficient: 70 ppm/°C maximum
Operating current range: 100 µA to 10 mA
Output impedance: 0.3 Ω maximum
Temperature range: −40°C to +85°C
APPLICATIONS
Precision data acquisition systems
Battery-powered equipment
Cellular phone
Notebook computer
PDA
GPS
3 V/5 V, 8-/12-bit data converters
Portable medical instruments
Industrial process control systems
Precision instruments
PIN CONFIGURATION
NC = NO CONNECT
V+
1
V–
2
TRIM/NC
3
ADR510
TOP VIEW
(Not to Scale)
03270-001
Figure 1. 3-Lead SOT-23-3
GENERAL DESCRIPTION
Designed for space critical applications, the ADR510 is a low
voltage (1.000 V), precision shunt-mode voltage reference in an
ultracompact (3 mm × 3 mm) SOT-23-3 package. The ADR510
features low temperature drift (70 ppm/°C), high accuracy
(±0.35%), and ultralow noise (4 μV p-p) performance.
The ADR510 advanced design eliminates the need for an external
capacitor, yet it is stable with any capacitive load. The minimum
operating current increases from 100 μA to a maximum of 10 mA.
This low operating current and ease of use make the ADR510
ideally suited for handheld battery-powered applications.
A TRIM terminal is available on the ADR510 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.
S
I
L
+ I
Q
I
Q
C
OUT
(OPTIONAL)
V
OUT
= 1.0V
R
BIAS
I
L
ADR510
I
L
+ I
Q
V
S
– V
OUT
R
BIAS
=
3270-002
Figure 2. Typical Operating Circuit
Table 1. ADR510
Part
Output
Voltage, V
OUT
Initial Accuracy
Temperature
Coefficient
ADR510A 1.000 V 3.5 mV 0.35% 70 ppm/°C
