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GENERAL DESCRIPTION

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.

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

Single 5 V Supply Operation

Power Dissipation

115 mW Maximum,

21 μW @ 100 SPS

Power-Down Mode: 7 W Max

Package: 48-Lead Quad Flat Pack (LQFP)

48-Lead Chip Scale Package (LFCSP)

Pin-to-Pin Compatible Upgrade of the AD7660

APPLICATIONS

Data Acquisition

Instrumentation

Digital Signal Processing

Spectrum Analysis

Medical Instruments

Battery-Powered Systems

Process Control