AD7641

Features:

18-bit resolution with no missing codes
2.5V internal low drift refernce
Throughput:
2 MSPS (Warp mode)
1.5 MSPS (Normal mode)
INL: ±2 LSB typical
S/(N+D): 93 dB typical @ 100 kHz ( V_REF = 2.5 V )
THD: −100 dB typical @ 100 kHz
Differential input range: ±VREF (V_REF up to 2.5 V)
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
Single 2.5 V supply operation
Power dissipation: 100 mW typical @ 2 MSPS
Power-down mode
48-LQFP and LFCSP packages
Speed upgrade of the AD7674
Pin-to-pin compatible with the AD7621





Application

Medical instruments
High dynamic data acquisition
Instrumentation
Spectrum analysis
ATE





Pinout








Specifications






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

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.