a
FEATURES
Throughput
1 MSPS (Warp Mode)
800 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 @ 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
112 mW Typical
15 W @ 100 SPS
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
APPLICATIONS
Data Acquisition
Communication
Instrumentation
Spectrum Analysis
Medical Instruments
Process Control
GENERAL DESCRIPTION
IND(4R)
INC(4R)
INB(2R)
INA(R)
INGND
16-Bit, 1 MSPS CMOS ADC
AD7671
___
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
AD7671
SERIAL
PORT
OVDD
OGND
SER/PAR
BUSY
D[15:0]
CS
RD
OB/2C
BYTESWAP
WARP
IMPULSE
CNVST
PulSAR Selection
Type/kSPS
Pseudo
Differential
True Bipolar
True Differential
18-Bit
Simultaneous/
Multichannel
100–250
AD7660
AD7663
AD7675
AD7678
500–570
AD7650
AD7664
AD7665
AD7676
AD7679
AD7654
800–1000
AD7671
AD7677
AD7674
AD7655
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.
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.
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.
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.
PRODUCT HIGHLIGHTS
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, 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. Trademarks and
registered trademarks are the property of their respective companies.
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.
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.
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
©
2012
Analog Devices, Inc. All rights reserved.
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