AD7641: 18-Bit, 2 MSPS SAR ADC
The AD7641 is a 18-bit, 2 MSPS, charge redistribution SAR, fully differential analog-to-digital converter that operates from a single 2.5 V power supply. The part contains a high-speed 18-bit sampling ...More
AD7641: 18-Bit, 2 MSPS SAR ADC
Product Description
The AD7641 is a 18-bit, 2 MSPS, charge redistribution SAR, fully differential analog-to-digital converter that operates from a single 2.5 V power supply. The part contains a high-speed 18-bit sampling ADC, an internal conversion clock, an internal reference buffer, error correction circuits, and both serial and parallel system interface ports. It features a very high sampling rate mode (Warp) and a fast mode (Normal) for asynchronous conversion rate applications.
The AD7641 is hardware factory calibrated and comprehensively tested to ensure ac parameters such as signal-to-noise ratio (SNR) and total harmonic distortion (THD) in addition to the more traditional dc parameters of gain, offset and linearity.
Operation is specified from −40°C to +85°C.
Applications
- Medical instruments
- High dynamic data acquisition
- Instrumentation
- Spectrum analysis
- ATE
- Data Sheet Rev 0, 01/2006 (pdf 666kB)
- (About Data Sheets)
Features
- 18-bit resolution with no missing codes
- 2.5 V internal low drift reference
- Throughput:
2 MSPS (Warp mode)
1.5 MSPS (Normal mode) - Differential input range: ± VREF
(VREF up to 2.5 V)
- INL: ±2 LSB typical
- No pipeline delay ( SAR architecture )
- Parallel (18-, 16-, or 8-bit bus)
- Serial 5 V/3.3 V/2.5 V interface
- SPI®/QSPI™/MICROWIRE™/DSP compatible
- On-board low drift reference with buffer and temperature sensor
Diagrams
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- Other Diagrams
- Symbols and Footprints
Functional Block Diagram for AD7641
18-Bit, 2 MSPS SAR ADC
Functional Block Diagram for AD7641