Analog Devices AD8476 Evaluation Board AD8476-EVALZ AD8476-EVALZ Data Sheet
Product codes
AD8476-EVALZ
Low Power, Unity Gain, Fully
Differential Amplifier and ADC Driver
Data Sheet
Rev. B
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FEATURES
Very low power
330 μA supply current
Extremely low harmonic distortion
−126 HD2 at 10 kHz
−128 HD3 at 10 kHz
Fully differential or single-ended inputs/outputs
Differential output designed to drive precision ADCs
Differential output designed to drive precision ADCs
Drives switched capacitor and Σ-Δ ADCs
Rail-to-rail outputs
Rail-to-rail outputs
VOCM pin adjusts output common mode
Robust overvoltage up to 18 V beyond supplies
High performance
Robust overvoltage up to 18 V beyond supplies
High performance
Suitable for driving 16-bit converter up to 250 kSPS
39 nV/√Hz output noise
1 ppm/°C gain drift maximum
200 μV maximum output offset
10 V/μs slew rate
6 MHz bandwidth
39 nV/√Hz output noise
1 ppm/°C gain drift maximum
200 μV maximum output offset
10 V/μs slew rate
6 MHz bandwidth
Single supply: 3 V to 18 V
Dual supplies: ±1.5 V to ±9 V
Dual supplies: ±1.5 V to ±9 V
APPLICATIONS
ADC driver
Differential instrumentation amplifier building block
Single-ended-to-differential converter
Battery-powered instruments
Differential instrumentation amplifier building block
Single-ended-to-differential converter
Battery-powered instruments
FUNCTIONAL BLOCK DIAGRAM
10kΩ
10kΩ
10kΩ
10kΩ
10kΩ
INN
1
+V
S
2
V
O
CM
3
+
O
UT
4
INP
8
8
–V
S
7
NC
6
6
–O
UT
5
NOTES
1. NC = NO CONNECT.
1. NC = NO CONNECT.
DO NOT CONNECT TO THIS PIN.
10195-
001
AD8476
Figure 1. 8-Lead MSOP
12
11
10
1
3
4
NC
–OUT
+OUT
9
VOCM
INP
INN
2
INP
INN
6
+V
S
5
+V
S
7
+V
S
8
+V
S
16
–V
S
15
–V
S
14
–V
S
13
–V
S
10kΩ
10kΩ
10kΩ
10kΩ
AD8476
NOTES
1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
1. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
10195-
002
Figure 2. 16-Lead LFCSP
GENERAL DESCRIPTION
amplifier with integrated gain resistors for unity gain. It is an ideal
choice for driving low power, high performance ADCs as a
single-ended-to-differential or differential-to-differential
amplifier. It provides a precision gain of 1, common-mode level
shifting, low temperature drift, and rail-to-rail outputs for
maximum dynamic range.
The
choice for driving low power, high performance ADCs as a
single-ended-to-differential or differential-to-differential
amplifier. It provides a precision gain of 1, common-mode level
shifting, low temperature drift, and rail-to-rail outputs for
maximum dynamic range.
The
industrial input voltages up to ±23 V while operating on a dual 5 V
supply. Power dissipation on a single 5 V supply is only 1.5 mW.
The
supply. Power dissipation on a single 5 V supply is only 1.5 mW.
The
works well with SAR, Σ-Δ, and pipeline converters.
The high current output stage of the part allows it to drive the
switched capacitor front-end circuits of many ADCs with
minimal error.
Unlike many differential drivers on the market, the
minimal error.
Unlike many differential drivers on the market, the
a high precision amplifier. With 200 µV maximum output
offset, 39 nV/√Hz noise, and −102 dB THD + N at 10 kHz, the
offset, 39 nV/√Hz noise, and −102 dB THD + N at 10 kHz, the
pairs well with low power, high accuracy converters.
precision for 250 kSPS acquisition times.
The
The
LFCSP and 8-lead MSOP packages. It is fully specified over the
−40°C to +125°C temperature range.
−40°C to +125°C temperature range.