AD7664 Analog Devices Data Sheet Manual

16-Bit, 570 k SPS

Pul SAR® Unipolar CMOS ADC

AD7664*

FEATURES FUNCTIONAL BLOCK DIAGRAM

Throughput:

AGND REF REFGND DGNDDVDDAVDD

570 k SPS (Warp Mode) 500 k SPS (Normal Mode)

AD7664

444 k SPS (Impulse Mode)

SERIAL OGND

INL:
2.5 LSB Max (
0.0038% of Full Scale)

SWITCHED

16-Bit Resolution with No Missing Codes

INGND CAP DAC

S/(N+D): 90 d B Typ @ 45 k Hz

THD: –100 d B Typ @ 45 k Hz BUSY

PARALLEL

Analog Input Voltage Range: 0 V to 2.5 V INTERFACE RD

Both AC and DC Specifications CLOCK

No Pipeline Delay

CONTROL LOGIC AND SER/PAR

RESET

Parallel and Serial 5 V/3 V Interface CALIBRATION CIRCUITRY

OB/2C

SPI®/QSPITM/MICROWIRETM/DSP Compatible Single 5 V Supply Operation

IMPULSE CNVSTWARP

Power Dissipation 115 m W Maximum,

Table I. Pul SAR Selection

21 W @ 100 SPS Power-Down Mode: 7 W Max

Type/k SPS 100–250 500–570 800–1000

Package: 48-Lead Quad Flat Pack (LQFP)

48-Lead Chip Scale Package (LFCSP) Pseudo AD7651 AD7650/AD7652 AD7653 Pin-to-Pin Compatible Upgrade of the AD7660 Differential AD7660/AD7661 AD7664/AD7666 AD7667

True Bipolar AD7663 AD7665 AD7671

APPLICATIONS Data Acquisition

True AD7675 AD7676 AD7677

Instrumentation www.BDTIC.com/A

Differential

Digital Signal Processing

18-Bit AD7678 AD7679 AD7674

Spectrum Analysis Medical Instruments

Simultaneous/ AD7654

Battery-Powered Systems

Multichannel AD7655

Process Control GENERAL DESCRIPTION

It is fabricated using Analog Devices’ high performance, 0.6 micron

The AD7664 is a 16-bit, 570 k SPS, charge redistribution SAR,

CMOS process, with correspondingly low cost and is available in a

analog-to-digital converter that operates from a single 5 V power

48-lead LQFP and a tiny 48-lead LFCSP with operation specified

supply. The part contains a high speed 16-bit sampling ADC,

from –40°C to +85°C.

an internal conversion clock, error correction circuits, and both serial and parallel system interface ports.

PRODUCT HIGHLIGHTS

The AD7664 is hardware factory-calibrated and is comprehensively 1. Fast Throughput tested to ensure such ac parameters as signal-to-noise ratio (SNR) The AD7664 is a 570 k SPS, charge redistribution, 16-bit and total harmonic distortion (THD), in addition to the more SAR ADC with internal error correction circuitry. traditional dc parameters of gain, offset, and linearity. 2. Superior INL

The AD7664 has a maximum integral nonlinearity of 2.5 LSBs

It features a very high sampling rate mode (Warp), a fast mode

with no missing 16-bit code.

(Normal) for asynchronous conversion rate applications, and for

3. Single-Supply Operation

low power applications, a reduced power mode (Impulse) where

The AD7664 operates from a single 5 V supply and dissipates

the power is scaled with the throughput.

only a maximum of 115 m W. 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. 4. Serial or Parallel Interface REV. Versatile parallel or 2-wire serial interface arrangement compatible with both 3 V or 5 V logic.

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