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AD7665 Datasheet

  • AD7665

  • 16-Bit, 570 kSPS CMOS ADC

  • 1218.65KB

  • 26页

  • AD

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FEATURES
Throughput:
570 kSPS (Warp Mode)
500 kSPS (Normal Mode)
INL: 2.5 LSB Max ( 0.0038% of Full Scale)
16-Bit Resolution with No Missing Codes
S/(N+D): 90 dB Typ @ 180 kHz
THD: 鈥?00 dB Typ @ 180 kHz
Analog Input Voltage Ranges:
Bipolar: 10 V, 5 V, 2.5 V
Unipolar: 0 V to 10 V, 0 V to 5 V, 0 V to 2.5 V
Both AC and DC Specifications
No Pipeline Delay
Parallel (8/16 Bits) and Serial 5 V/3 V Interface
Single 5 V Supply Operation
Power Dissipation
64 mW Typical
15 W @ 100 SPS
Power-Down Mode: 7 W Max
Package: 48-Lead Quad Flatpack (LQFP)
Pin-to-Pin Compatible Upgrade of the AD7664/AD7663
APPLICATIONS
Data Acquisition
Communication
Instrumentation
Spectrum Analysis
Medical Instruments
Process Control
GENERAL DESCRIPTION
IND(4R)
INC(4R)
INB(2R)
INA(R)
INGND
16-Bit, 570 kSPS CMOS ADC
AD7665*
FUNCTIONAL BLOCK DIAGRAM
AVDD AGND REF REFGND
4R
4R
2R
R
SWITCHED
CAP DAC
PARALLEL 16
INTERFACE
PD
RESET
CLOCK
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
DVDD
DGND
AD7665
SERIAL
PORT
OVDD
OGND
SER/PAR
BUSY
DATA[15:0]
CS
RD
OB/2C
BYTESWAP
WARP
IMPULSE
CNVST
PRODUCT HIGHLIGHTS
The AD7665 is a 16-bit, 570 kSPS, charge redistribution SAR,
analog-to-digital converter that operates from a single 5 V power
supply. It contains a high-speed 16-bit sampling ADC, a resistor
input scaler which allows various input ranges, an internal con-
version clock, error correction circuits, and both serial and
parallel system interface ports.
The AD7665 is hardware factory-calibrated and is comprehen-
sively 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) and, for
asynchronous conversion rate applications, a fast mode (Nor-
mal) and, for low power applications, a reduced power mode
(Impulse) where the power is scaled with the throughput. It is
fabricated using Analog Devices鈥?high-performance, 0.6 micron
CMOS process and is available in a 48-lead LQFP with opera-
tion specified from 鈥?0掳C to +85掳C.
*Patent
pending.
1. Fast Throughput
The AD7665 is a very high speed (570 kSPS in Warp mode
and 500 kSPS in Normal mode), charge redistribution,
16-bit SAR ADC.
2. Single Supply Operation
The AD7665 operates from a single 5 V supply, dissipates
only 64 mW typical, even lower when a reduced throughput
is used with the reduced power mode (Impulse) and a power-
down mode.
3. Superior INL
The AD7665 has a maximum integral nonlinearity of 2.5 LSB
with no missing 16-bit code.
4. Serial or Parallel Interface
Versatile parallel (8 or 16 bits) or 2-wire serial interface
arrangement compatible with both 3 V or 5 V logic.
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 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
www.analog.com
Fax: 781/326-8703
漏 Analog Devices, Inc., 2001

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