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AD8556
PRODUCTIONDigitally Programmable Sensor Signal Amplifier with EMI Filters
- Part Models
- 6
- 1ku List Price
- Starting From $4.19
Part Details
- 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
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 ADI 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 1,280 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. 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 pull-down current source at the VCLAMP pin. This 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 2.7 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
- Automotive Sensors
- Pressure and Position Sensors
- Precision Current Sensing
- Strain Gages
Documentation
Data Sheet 1
Technical Articles 2
Technical Book 1
Analog Dialogue 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD8556ACPZ-R2 | 16-Lead LFCSP (4mm x 4mm w/ EP) | ||
| AD8556ACPZ-REEL | 16-Lead LFCSP (4mm x 4mm w/ EP) | ||
| AD8556ACPZ-REEL7 | 16-Lead LFCSP (4mm x 4mm w/ EP) | ||
| AD8556ARZ | 8-Lead SOIC | ||
| AD8556ARZ-REEL | 8-Lead SOIC | ||
| AD8556ARZ-REEL7 | 8-Lead SOIC |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
May 4, 2016 - 14_0178 Conversion of 3x3mm, 4x4mm and 5x5mm LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to Amkor Philippines |
||
| AD8556ACPZ-R2 | ||
| AD8556ACPZ-REEL | Obsolete | |
| AD8556ACPZ-REEL7 | PRODUCTION | |
|
Jun 30, 2015 - 15_0134 AD8556 Wafer Fab Transfer to Taiwan Semiconductor Manufacturing Company (TSMC) |
||
| AD8556ACPZ-R2 | ||
| AD8556ACPZ-REEL7 | PRODUCTION | |
| AD8556ARZ | PRODUCTION | |
| AD8556ARZ-REEL | PRODUCTION | |
| AD8556ARZ-REEL7 | PRODUCTION | |
|
Feb 8, 2010 - 04_0080 Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland. |
||
| AD8556ACPZ-R2 | ||
| AD8556ACPZ-REEL7 | PRODUCTION | |
| AD8556ARZ | PRODUCTION | |
| AD8556ARZ-REEL | PRODUCTION | |
|
Jan 29, 2014 - 14_0014 ADI Corporate Obsolescence Notice-January 2014 (Standard Products) |
||
| AD8556ACPZ-REEL | Obsolete | |
This is the most up-to-date revision of the Data Sheet.
Evaluation Kits
AD8555/AD8556/AD8557 Evaluation Board