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AD7677 Datasheet

  • AD7677

  • 16-Bit, 1 LSB INL, 1 MSPS Differential ADC

  • 1848.43KB

  • 22页

  • AD

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a
FEATURES
Throughput: 1 MSPS
INL: 1 LSB Max ( 0.0015% of Full-Scale)
16 Bits Resolution with No Missing Codes
S/(N+D): 94 dB Typ @ 45 kHz
THD: 鈥?10 dB Typ @ 45 kHz
Differential Input Range: 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
115 mW Typical Power Dissipation, 15 W @ 100 SPS
Power-Down Mode: 7 W Max
Package: 48-Lead Quad Flat Pack (LQFP)
Pin-to-Pin Compatible Upgrade of the AD7664/AD7675/
AD7676
APPLICATIONS
CT Scanners
Data Acquisition
Instrumentation
Spectrum Analysis
Medical Instruments
Battery-Powered Systems
Process Control
16-Bit, 1 LSB INL, 1 MSPS
Differential ADC
AD7677
*
FUNCTIONAL BLOCK DIAGRAM
AVDD AGND REF REFGND
DVDD
DGND
OVDD
AD7677
IN+
IN鈥?/div>
SERIAL
PORT
SWITCHED
CAP DAC
16
OGND
SER/PAR
BUSY
DATA[15:0]
CLOCK
PD
RESET
PARALLEL
INTERFACE
CS
RD
OB/2C
BYTESWAP
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
WARP
IMPULSE
CNVST
GENERAL DESCRIPTION
PRODUCT HIGHLIGHTS
The AD7677 is a 16-bit, 1 MSPS, charge redistribution SAR,
fully differential, 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 AD7677 is hardware factory calibrated and 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 (Normal)
and, for low power applications, a reduced power mode (Impulse)
where the power is scaled with the throughput.
It is available in a 48-lead LQFP with operation specified from
鈥?0掳C to +85掳C.
1. Excellent INL
The AD7677 has a maximum integral nonlinearity of 1 LSB
with a no missing 16-bit code.
2. Superior AC Performances
The AD7677 has a minimum dynamic of 92 dB, 94 dB typical.
3. Fast Throughput
The AD7677 is a 1 MSPS, charge redistribution, 16-bit SAR
ADC with internal error correction circuitry.
4. Single-Supply Operation
The AD7677 operates from a single 5 V supply and typically
dissipates only 115 mW. Its power dissipation decreases
with the throughput. It consumes 7
碌W
maximum when in
power-down.
5. 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.
*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 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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