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AD7663 Datasheet

  • AD7663

  • 16-Bit 1 MSPS SAR Unipolar ADC with Ref

  • 1337.63KB

  • 26页

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PRELIMINARY TECHNICAL DATA
a
16-Bit 1 MSPS SAR Unipolar ADC with Ref
Preliminary Technical Data
AD7667
*
FEATURES
Throughput:
1 MSPS (Warp Mode)
800 kSPS (Normal Mode)
INL: 卤2.5 LSB Max (卤0.0038% of Full Scale)
16 Bits Resolution with No Missing Codes
Analog Input Voltage Range: 0 V to 2.5 V
No Pipeline Delay
Parallel and Serial 5 V/3 V Interface
SPI
TM
/QSPI
TM
/MICROWIRE
TM
/DSP Compatible
Single 5 V Supply Operation
Power Dissipation
112 mW Typ without REF, 122 mW Typ with REF
15 W @ 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 with PulSAR ADCs
APPLICATIONS
Data Acquisition
Instrumentation
Digital Signal Processing
Spectrum Analysis
Medical Instruments
Battery-Powered Systems
Process Control
FUNCTIONAL
REFBUFIN
AGND
AVDD
BLOCK
DIAGRAM
DVDD DGND
OVDD
SERIAL
PORT
REF REFGND
AD7667
2.5 V REF
OGND
16
IN
INGND
SWITCHED
CAP DAC
DATA[15:0]
BUSY
PARALLEL
INTERFACE
CLOCK
PDREF
RD
CS
SER/PAR
OB/2C
PDBUF
PD
RESET
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
BYTESWAP
WARP
IMPULSE
CNVST
PulSAR Selection
Type / kSPS
Pseudo
Differential
100 - 250
AD7651
AD7660/61
500 - 570
AD7650/52
AD7664/66
1000
AD7653
AD7667
True Bipolar
True
Differential
AD7663
AD7675
AD7665
AD7676
AD7671
AD7677
PRODUCT HIGHLIGHTS
GENERAL DESCRIPTION
The AD7667 is a 16-bit, 1 MSPS, 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, internal reference, error
correction circuits, and both serial and parallel system inter-
face ports.
It features a very high sampling rate mode (Warp) and, for
asynchronous conversion rate applications, a fast mode
(Normal) and, for low power applications, a reduced power
mode (Impulse) where the power is scaled with the through-
put.
It is fabricated using Analog Devices鈥?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 speci-
fied from 鈥?0掳C to +85掳C.
*Patent
pending.
SPI and QSPI are trademarks of Motorola Inc.
MICROWIRE ia a trademark of National Semiconductor Corporation
1. Fast Throughput
The AD7667 is a 1 MSPS, charge redistribution, 16-bit
SAR ADC with internal error correction circuitry.
2. Internal Reference
The AD7667 has an internal reference and allows for an
external reference to be used.
3. Superior INL
The AD7667 has a maximum integral nonlinearity of 2.5
LSB with no missing 16-bit code.
4. Single-Supply Operation
The AD7667 operates from a single 5 V supply and dissipates
a typical of 112 mW. In impulse mode, its power dissi-
pation decreases with the throughput. It consumes 7 碌W
maximum when in power-down.
5. Serial or Parallel Interface
Versatile parallel or 2-wire serial interface arrangement
compatible with both 3 V or 5 V logic.
REV. PrA
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 that
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: 781/329-4700
Fax: 781/326-8703
www.analog.com
漏 Analog Devices, Inc., 2002

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