Analog Devices AD8475 Evaluation Board AD8475-EVALZ AD8475-EVALZ 数据表
产品代码
AD8475-EVALZ
Precision, Selectable Gain,
Fully Differential Funnel Amplifier
Data Sheet
Rev. C
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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
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FEATURES
Precision attenuation: G = 0.4, G = 0.8
Fully differential or single-ended input/output
Differential output designed to drive precision ADCs
Fully differential or single-ended input/output
Differential output designed to drive precision ADCs
Drives switched capacitor and Σ-Δ ADCs
Rail-to-rail output
Rail-to-rail output
VOCM pin adjusts output common-mode voltage
Robust overvoltage protection up to ±15 V (V
Robust overvoltage protection up to ±15 V (V
S
= +5 V)
Single supply: 3 V to 10 V
Dual supplies: ±1.5 V to ±5 V
High performance
Dual supplies: ±1.5 V to ±5 V
High performance
Suited for driving 18-bit converters up to 4 MSPS
10 nV/√Hz output noise
3 ppm/°C gain drift
500 μV maximum output offset
50 V/μs slew rate
10 nV/√Hz output noise
3 ppm/°C gain drift
500 μV maximum output offset
50 V/μs slew rate
Low power: 3.2 mA supply current
APPLICATIONS
ADC drivers
Differential instrumentation amplifier building blocks
Single-ended-to-differential converters
Differential instrumentation amplifier building blocks
Single-ended-to-differential converters
GENERAL DESCRIPTION
integrated precision gain resistors. It provides precision attenuation
(by 0.4 or 0.8), common-mode level shifting, and single-ended-to-
differential conversion along with input overvoltage protection.
Power dissipation on a single 5 V supply is only 16 mW.
The
(by 0.4 or 0.8), common-mode level shifting, and single-ended-to-
differential conversion along with input overvoltage protection.
Power dissipation on a single 5 V supply is only 16 mW.
The
block, designed to process signal levels of up to ±10 V on a single
supply. It provides a complete interface to make industrial level
signals directly compatible with the differential input ranges of low
voltage high performance 16-bit or 18-bit single-supply successive
approximation (SAR) analog-to-digital converters (ADCs).
The
supply. It provides a complete interface to make industrial level
signals directly compatible with the differential input ranges of low
voltage high performance 16-bit or 18-bit single-supply successive
approximation (SAR) analog-to-digital converters (ADCs).
The
options: 0.4 and 0.8. The gain of the part is set by driving the
input pin corresponding to the appropriate gain.
The
input pin corresponding to the appropriate gain.
The
industrial input voltages up to ±15 V while operating on a single
5 V supply. The VOCM pin adjusts the output voltage common
mode for precision level shifting, to match the ADC’s input range
and maximize dynamic range.
5 V supply. The VOCM pin adjusts the output voltage common
mode for precision level shifting, to match the ADC’s input range
and maximize dynamic range.
FUNCTIONAL BLOCK DIAGRAMS
12
11
10
1
3
4
NC
–OUT
+OUT
9
VOCM
+IN 0.4x
–IN 0.8x
2
+IN 0.8x
–IN 0.4x
6
+V
S
5
–I
N 0.
4x
7
+V
S
8
+V
S
16
+
IN 0.
4x
15
–V
S
14
–V
S
13
–V
S
1kΩ
1.25kΩ
1.25kΩ
1kΩ
AD8475
1.25kΩ
1.25kΩ
NC = NO CONNECT
09432-
001
Figure 1. 16-Lead LFCSP
NC = NO CONNECT
1kΩ
1kΩ
1.25kΩ
1.25kΩ
1.25kΩ
AD8475
–I
N 0.
8x
1
–I
N 0.
4x
2
+V
S
3
V
O
CM
4
+
O
UT
5
+
IN 0.
8x
10
+
IN 0.
4x
9
–V
S
8
NC
7
–O
UT
6
1.25kΩ
1.25kΩ
09432-
002
Figure 2. 10-Lead MSOP
The
works extremely 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 in the market, the
drive the switched capacitor front-end circuits of many ADCs with
minimal error.
Unlike many differential drivers in the market, the
is a
high precision amplifier. With 500 µV maximum output offset,
10 nV/√Hz output noise, and −112 dB THD + N, the
10 nV/√Hz output noise, and −112 dB THD + N, the
pairs well with high accuracy converters. Considering its low power
consumption and high precision, the slew-enhanced
consumption and high precision, the slew-enhanced
has
excellent speed, settling to 18-bit precision for 4 MSPS acquisition.
The
The
is available in a space-saving 16-lead 3 mm × 3 mm
LFCSP package and a 10-lead MSOP package. It is fully specified
over the −40°C to +85°C temperature range.
over the −40°C to +85°C temperature range.