Features
Throughput:
570 kSPS (Warp mode)
500 kSPS (Normal mode)
444 kSPS (Impulse mode)
INL: 2.5 LSB max (0.0038% of full scale)
16-Bit resolution with no missing codes
S/(N+D): 90 dB Typ @ 45 kHz
THD: –100 dB Typ @ 45 kHz
Analog input voltage range: 0 V to 2.5 V
Both AC and DC specifications
No pipeline delay
Parallel and serial 5 V/3 V interface
SPI®/QSPI™/MICROWIRE™/DSP compatible
See data sheet for additional features
The AD7664 is a 16-bit, 570 kSPS, charge redistribution SAR, analog-to-digital converter that operates from a single 5 V power supply. The part contains a high speed 16-bit sampling ADC, an internal conversion clock, error correction circuits, and both serial and parallel system interface ports.
The AD7664 is hardware factory-calibrated and is comprehensively tested to ensure such ac parameters as signal-to-noise ratio (SNR) and total harmonic distortion (THD), in addition to the more traditional dc parameters of gain, offset, and linearity.
It features a very high sampling rate mode (Warp), a fast mode (Normal) for asynchronous conversion rate applications, and for low power applications, a reduced power mode (Impulse) where the power is scaled with the throughput.
It is fabricated using Analog Devices’ high performance, 0.6 micron CMOS process, with correspondingly low cost and is available in a 48-lead LQFP and a tiny 48-lead LFCSP with operation specified from –40°C to +85°C.
PRODUCT HIGHLIGHTS
Fast Throughput
The AD7664 is a 570 kSPS, charge redistribution, 16-bit SAR ADC with internal error correction circuitry.
Superior INL
The AD7664 has a maximum integral nonlinearity of 2.5 LSBs with no missing 16-bit code.
Single-Supply Operation
The AD7664 operates from a single 5 V supply and dissipates only a maximum of 115 mW. In Impulse Mode, its power dissipation decreases with the throughput to, for instance, only 21 µW at a 100 SPS throughput. It consumes 7 µW maximum when in power-down.
Serial or Parallel Interface
Versatile parallel or 2-wire serial interface arrangement compatible with both 3 V or 5 V logic.
APPLICATIONS
Data acquisition
Instrumentation
Digital signal processing
Spectrum analysis
Medical instruments
Battery-powered systems
Process control
