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AD7677ASTZRL

更新时间： 2024-11-30 13:05:23
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a
16-Bit, 1 MSPS CMOS ADC  
AD7671  
___  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
Throughput  
1 MSPS (Warp Mode)  
AVDD AGND REF REFGND  
DVDD DGND  
800 kSPS (Normal Mode)  
4R  
4R  
2R  
R
IND(4R)  
INC(4R)  
INB(2R)  
INA(R)  
AD7671  
INL: ꢀ2.5 LSB Max (ꢀ0.0038% of Full Scale)  
16-Bit Resolution with No Missing Codes  
S/(N+D): 90 dB Typ @ 250 kHz  
THD: –100 dB Typ @ 250 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  
SPI®/QSPI™/MICROWIRE™/DSP Compatible  
Single 5 V Supply Operation  
Power Dissipation  
OVDD  
OGND  
SERIAL  
PORT  
SWITCHED  
CAP DAC  
SER/PAR  
BUSY  
D[15:0]  
CS  
INGND  
PARALLEL  
INTERFACE  
16  
CLOCK  
PD  
RESET  
RD  
CONTROL LOGIC AND  
CALIBRATION CIRCUITRY  
OB/2C  
BYTESWAP  
WARP IMPULSE  
CNVST  
112 mW Typical  
15 ꢁW @ 100 SPS  
PulSAR Selection  
Power-Down Mode: 7 ꢁW Max  
Package: 48-Lead Quad Flatpack (LQFP)  
Package: 48-Lead Chip Scale (LFCSP)  
Pin-to-Pin Compatible Upgrade of the AD7665/AD7664  
Type/kSPS  
100–250  
500–570  
800–1000  
Pseudo  
Differential  
AD7660  
AD7650  
AD7664  
True Bipolar  
True Differential  
18-Bit  
AD7663  
AD7675  
AD7678  
AD7665  
AD7676  
AD7679  
AD7654  
AD7671  
AD7677  
AD7674  
AD7655  
APPLICATIONS  
Data Acquisition  
Communication  
Instrumentation  
Spectrum Analysis  
Medical Instruments  
Process Control  
Simultaneous/  
Multichannel  
GENERAL DESCRIPTION  
It is fabricated using Analog Devices’ high performance, 0.6 micron  
CMOS process and is available in a 48-lead LQFP and a tiny  
48-lead LFCSP, with operation specified from –40∞C to +85∞C.  
The AD7671 is a 16-bit, 1 MSPS, 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 that allows various input ranges, an internal  
conversion clock, error correction circuits, and both serial  
and parallel system interface ports.  
PRODUCT HIGHLIGHTS  
1. Fast Throughput  
The AD7671 is a very high speed (1 MSPS in Warp Mode  
and 800 kSPS in Normal Mode), charge redistribution, 16-bit  
SAR ADC.  
The AD7671 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.  
2. Single-Supply Operation  
The AD7671 operates from a single 5 V supply, dissipates  
only 112 mW typical, even lower when a reduced throughput  
is used with the reduced power mode (Impulse) and a power-  
down mode.  
It features a very high sampling rate mode (Warp), a fast mode  
(Normal) for asynchronous conversion rate applications, and, for  
low power applications, a reduced power mode (Impulse) where  
the power is scaled with the throughput.  
3. Superior INL  
The AD7671 has a maximum integral nonlinearity of 2.5 LSB  
with no missing 16-bit code.  
4. Serial or Parallel Interface  
Versatile parallel (8 bits or 16 bits) or 2-wire serial interface  
arrangement compatible with both 3 V or 5 V logic.  
REV. C  
Information furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assumed by Analog Devices for its  
use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat  
may result from its use. No license is granted by implication or otherwise  
under any patent or patent rights of Analog Devices. Trademarks and  
registered trademarks are the property of their respective companies.  
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  
Analog Devices, Inc. All rights reserved.  
2012  
©
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