Quick Detail:
Digitally Programmable Sensor Signal Amplifier with EMI Filters
Description:
The AD8556 is a zero-drift, sensor signal amplifier with digitally programmable gain and output offset. Designed to easily and accurately convert variable pressure sensor and strain bridge outputs to a well-defined output voltage range, the AD8556 accurately amplifies many other differential or single-ended sensor outputs. The AD8556 uses the Analog Devices, Inc. patented low noise, auto-zero and DigiTrim® technologies to create an incredibly accurate and flexible signal processing solution in a very compact footprint.
Gain is digitally programmable in a wide range from 70 to 1280 through a serial data interface. Gain adjustment can be fully simulated in-circuit and then permanently programmed with reliable polyfuse technology. Output offset voltage is also digitally programmable and is ratiometric to the supply voltage. The AD8556 also features internal EMI filters on the VNEG, VPOS, FILT and VCLAMP pins.
In addition to extremely low input offset voltage, low input offset
voltage drift, and very high dc and ac CMRR, the AD8556 also
includes a pull-up current source at the input pins and a pulldown current source at the VCLAMP pin, which allows open
wire and shorted wire fault detection. A low-pass filter function
is implemented via a single low cost external capacitor. Output
clamping set via an external reference voltage allows the AD8556
to drive lower voltage ADCs safely and accurately.
When used in conjunction with an ADC referenced to the same
supply, the system accuracy becomes immune to normal supply
voltage variations. Output offset voltage can be adjusted with a
resolution of better than 0.4% of the difference between VDD
and VSS. A lockout trim after gain and offset adjustment further
ensures field reliability.
The AD8556 is fully specified from −40°C to +140°C.
Operating from single-supply voltages of 4.5 V to 5.5 V, the
AD8556 is offered in the 8-lead SOIC_N and 4 mm × 4 mm 16-lead LFCSP_VQ.
Applications:
EMI filters at input pins
Specified from −40°C to +140°C
Low offset voltage: 10 μV maximum
Low input offset voltage drift: 65 nV/°C maximum
High CMRR: 94 dB minimum
Digitally programmable gain and output offset voltage
Programmable output clamp voltage
Open and short wire fault detection
Low-pass filtering
Single-wire serial interface
Stable with any capacitive load
SOIC_N and LFCSP_VQ packages
4.5 V to 5.5 V operation
Specifications:
|
Datasheets |
AD8556 |
|
Product Photos |
8-SOIC |
|
Product Training Modules |
Indirect Current Feedback Instrumentation Amplifier Applications Guide |
|
Standard Package |
98 |
|
Category |
Integrated Circuits (ICs) |
|
Family |
Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps |
|
Series |
DigiTrim® |
|
Packaging |
Tube |
|
Amplifier Type |
Chopper (Zero-Drift) |
|
Number of Circuits |
1 |
|
Output Type |
- |
|
Slew Rate |
1.2 V/µs |
|
Gain Bandwidth Product |
2MHz |
|
-3db Bandwidth |
- |
|
Current - Input Bias |
49nA |
|
Voltage - Input Offset |
2µV |
|
Current - Supply |
2mA |
|
Current - Output / Channel |
10mA |
|
Voltage - Supply, Single/Dual (±) |
4.5 V ~ 5.5 V |
|
Operating Temperature |
-40°C ~ 140°C |
|
Mounting Type |
Surface Mount |
|
Package / Case |
8-SOIC (0.154", 3.90mm Width) |
|
Supplier Device Package |
8-SOIC N |
|
Catalog Page |
730 (CN081 PDF) |
Competitive Advantage:
Warranty :180days for all goods
Free shipping:Order over $600 win a free shipment fee:goods weight below 3Kg.
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