AD7660 Datasheet, PDF (1/20 Pages) Analog Devices – 16-Bit, 100 kSPS CMOS ADC

a
FEATURES
Throughput: 100 kSPS
INL: ؎3 LSB Max (؎0.0046% of Full-Scale)
16 Bits Resolution with No Missing Codes
S/(N+D): 87 dB Min, 90 dB Typ @ 10 kHz
THD: –96 dB Max @ 10 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
Single 5 V Supply Operation
21 mW Typical Power Dissipation, 21 ␮W @ 100 SPS
Power-Down Mode: 7 ␮W Max
Package: 48-Lead Quad Flatpack (LQFP)
Pin-to-Pin Compatible with the AD7664
APPLICATIONS
Data Acquisition
Battery-Powered Systems
PCMCIA
Instrumentation
Automatic Test Equipment
Scanners
Medical Instruments
Process Control
16-Bit, 100 kSPS CMOS ADC
AD7660*
FUNCTIONAL BLOCK DIAGRAM
AVDD AGND REF REFGND
DVDD DGND
IN
INGND
AD7660
SWITCHED
CAP DAC
SERIAL
PORT
16
PD
RESET
CLOCK
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
PARALLEL
INTERFACE
OVDD
OGND
DATA[15:0]
BUSY
RD
CS
SER/PAR
OB/2C
CNVST
GENERAL DESCRIPTION
The AD7660 is a 16-bit, 100 kSPS, charge redistribution SAR,
analog-to-digital converter that operates from a single 5 V power
supply. The part contains an internal conversion clock, error cor-
rection circuits, and both serial and parallel system interface ports.
The AD7660 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 is fabricated using Analog Devices’ high-performance, 0.6
micron CMOS process with correspondingly low cost, and is
available in a 48-lead LQFP with operation specified from
–40°C to +85°C.
PRODUCT HIGHLIGHTS
1. Fast Throughput
The AD7660 is a 100 kSPS, charge redistribution, 16-bit
SAR ADC with internal error correction circuitry.
2. Superior INL
The AD7660 has a maximum integral nonlinearity of 3 LSBs
with no missing 16-bit code.
3. Single-Supply Operation
The AD7660 operates from a single 5 V supply and only
dissipates 21 mW typical. 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
Versatile parallel or 2-wire serial interface arrangement com-
patible with both 3 V or 5 V logic.
*Patent pending.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] World Wide Web Site: http://www.analog.com
Fax: [phone]
© Analog Devices, Inc., 2000