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AD7654 Datasheet(PDF) 1 Page - Analog Devices

Part # AD7654
Description  16-Bit, 750 kSPS, Unipolar/Bipolar Programmable Input PulSAR ADC
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

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16-Bit, 750 kSPS, Unipolar/Bipolar
Programmable Input PulSAR® ADC
AD7612
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2006 Analog Devices, Inc. All rights reserved.
FEATURES
Multiple pins/software programmable input ranges:
5 V, 10 V, ±5 V, ±10 V
Pins or serial SPI®-compatible input ranges/mode selection
Throughput
750 kSPS (warp mode)
600 kSPS (normal mode)
500 kSPS (impulse mode)
INL: ±0.75 LSB typical, ±1.5 LSB maximum (±23 ppm of FSR)
16-bit resolution with no missing codes
SNR: 92 minimum (5 V) @ 2 kHz, 94 dB typical (±10 V) @ 2 kHz
THD: −107 dB typical
iCMOS™ process technology
5 V internal reference: typical drift 3 ppm/°C; TEMP output
No pipeline delay (SAR architecture)
Parallel (16- or 8-bit bus) and serial 5 V/3.3 V interface
SPI-/QSPI™-/MICROWIRE™-/DSP-compatible
Power dissipation: 190 mW @ 750 kSPS
Pb-free, 48-lead LQFP and LFCSP (7 mm × 7 mm) packages
APPLICATIONS
Process control
Medical instruments
High speed data acquisition
Digital signal processing
Instrumentation
Spectrum analysis
ATE
GENERAL DESCRIPTION
The AD7612 is a 16-bit charge redistribution successive
approximation register (SAR), architecture analog-to-digital
converter (ADC) fabricated on Analog Devices, Inc.’s iCMOS
high voltage process. The device is configured through hardware or
via a dedicated write only serial configuration port for input
range and operating mode. The AD7612 contains a high speed
16-bit sampling ADC, an internal conversion clock, an internal
reference (and buffer), error correction circuits, and both serial
and parallel system interface ports. A falling edge on CNVST
samples the analog input on IN+ with respect to a ground
sense, IN−. The AD7612 features four different analog input
ranges and three different sampling modes: warp mode for the
fastest throughput, normal mode for the fastest asynchronous
throughput, and impulse mode where power consumption is
scaled linearly with throughput. Operation is specified from
−40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
16
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
CLOCK
AD7612
DGND
DVDD
AVDD
AGND
REF REFGND
IN+
PD
RESET
CNVST
PDBUF
REFBUFIN
PDREF
REF
TEMP
D[15:0]
BUSY
RD
CS
OB/2C
OGND
OVDD
BYTESWAP
SER/PAR
REF
AMP
SERIAL DATA
PORT
PARALLEL
INTERFACE
SWITCHED
CAP DAC
VCC VEE
WARP IMPULSE BIPOLAR TEN
SERIAL
CONFIGURATION
PORT
IN–
Figure 1.
Table 1. 48-Lead 14-/16-/18-Bit PulSAR Selection
Type
100 kSPS to
250 kSPS
500 kSPS to
570 kSPS
800 kSPS to
1000 kSPS
>1000
kSPS
Pseudo
Differential
AD7651
AD7660
AD7661
AD7650
AD7652
AD7664
AD7666
AD7653
AD7667
True Bipolar
AD7663
AD7665
AD7612
AD7671
True
Differential
AD7675
AD7676
AD7677
AD7621
AD7622
AD7623
18-Bit, True
Differential
AD7678
AD7679
AD7674
AD7641
AD7643
Multichannel/
Simultaneous
AD7654
AD7655
PRODUCT HIGHLIGHTS
1.
Programmable input range and mode selection.
Pins or serial port for selecting input range/mode select.
2.
Fast throughput.
In warp mode, the AD7612 is 750 kSPS.
3.
Superior Linearity.
No missing 16-bit code. ±1.5 LSB max INL.
4.
Internal Reference.
5 V internal reference with a typical drift of ±3 ppm/°C
and an on-chip temperature sensor.
5.
Serial or Parallel Interface.
Versatile parallel (16- or 8-bit bus) or 2-wire serial interface
arrangement compatible with 3.3 V or 5 V logic.


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