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AD8555
NOT RECOMMENDED FOR NEW DESIGNSDigitally Programmable Sensor Signal Zero-Drift Amplifier
- Part Models
- 3
- 1ku List Price
- Starting From $4.53
Part Details
- Very low offset voltage: 10 μV maximum over temperature
- Very low input offset voltage drift: 60 nV/°C maximum
- High CMRR: 96 dB minimum
- Digitally programmable gain and output offset voltage
- Single-wire serial interface
- Open and short wire fault detection
- Low-pass filtering
- Stable with any capacitive load
- See data sheet for additional features
The AD8555 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 AD8555 also accurately amplifies many other differential or single-ended sensor outputs. The AD8555 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 proven and reliable poly-fuse technology. Output offset voltage is also digitally programmable and is ratiometric to the supply voltage.
In addition to extremely low input offset voltage and input off-set voltage drift and very high dc and ac CMRR, the AD8555 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 AD8555 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 AD8555 is fully specified over the extended industrial temperature range of −40°C to +125°C. Operating from single-supply voltages of 2.7 V to 5.5 V, the AD8555 is offered in the narrow 8-lead SOIC package and the 4 mm × 4 mm 16-lead LFCSP.
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 |
|---|---|---|---|
| AD8555ACPZ-REEL7 | 16-Lead LFCSP (4mm x 4mm w/ EP) | ||
| AD8555ARZ | 8-Lead SOIC | ||
| AD8555ARZ-REEL7 | 8-Lead SOIC |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
May 5, 2014 - 14_0020 Conversion of 4x4mm body Size LFCSP Package Outlines from Punch to Sawn and Transfer of Assembly Site to Amkor Philippines. |
||
| AD8555ACPZ-REEL7 | ||
|
Feb 8, 2010 - 04_0080 Qualification of the 8" C6 and Q Wafer Fab Processes at Analog Devices, Limerick, Ireland. |
||
| AD8555ACPZ-REEL7 | ||
| AD8555ARZ | ||
| AD8555ARZ-REEL7 | ||
|
Nov 23, 2010 - 10_0004 Halogen Free Material Change for SOIC Narrow Body Products Assembled at Amkor |
||
| AD8555ARZ | ||
| AD8555ARZ-REEL7 | ||
|
Aug 19, 2009 - 07_0024 Package Material Changes for SOT23, MiniSO, MQFP, PDIP, PLCC, SOIC (narrow and wide body), SSOP, TSSOP and TSSOP exposed pad |
||
| AD8555ARZ | ||
| AD8555ARZ-REEL7 | ||
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| AD8556 | PRODUCTION | Digitally Programmable Sensor Signal Amplifier with EMI Filters |
Evaluation Kits
AD8555/AD8556/AD8557 Evaluation Board