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14-Bit, 1 MSPS, Differential,
Programmable Input PulSAR
®
ADC
Data Sheet
AD7952
Rev. A
Document Feedbac
k
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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. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
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Tel: 781.329.4700 ©2007–2012 Analog Devices, Inc. All rights reserved.
Technical Suppor t www.analog.com
FEATURES
Multiple pins/software-programmable input ranges
+5 V (10 V p-p), +10 V (20 V p-p), ±5 V (20 V p-p),
±10 V (40 V p-p)
Pins or serial SPI®-compatible input ranges/mode selection
Throughput
1 MSPS (warp mode)
800 kSPS (normal mode)
670 kSPS (impulse mode)
14-bit resolution with no missing codes
INL: ±0.3 LSB typical, ±1 LSB maximum (±61 ppm of FSR)
SNR: 85 dB @ 2 kHz
iCMOS® process technology
5 V internal reference: typical drift 3 ppm/°C; TEMP output
No pipeline delay (SAR architecture)
Parallel (14- or 8-bit bus) and serial 5 V/3.3 V interface
SPI-/QSPI™-/MICROWIRE™-/DSP-compatible
Power dissipation
235 mW @ 1 MSPS
10 mW @ 1 kSPS
48-lead LQFP and 48-lead LFCSP (7 mm × 7 mm)
APPLICATIONS
Process controls
Medical instruments
High speed data acquisition
Digital signal processing
Instrumentation
Spectrum analysis
ATE
GENERAL DESCRIPTION
The AD7952 is a 14-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 AD7952 contains a high speed
14-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 fully differential analog inputs on IN+ and IN−.
The AD7952 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 is scaled with throughput.
Operation is specified from −40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
14
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
CLOCK
AD7952
DGNDDVDD
AVDD
AGND
REF REFGND
IN+
PD
RESET
CNVST
PDBUF
REFBUFIN
PDREF
REF
TEMP
D[13:0]
BUSY
RD
CS
OB/2C
OGND
OVDD
BYTESWAP
SER/PAR
REF
AMP
SERIAL DATA
PORT
PARALLEL
INTERFACE
SWITCHED
CAP DAC
V
CC
V
EE
WARP IMPULSE BIPOLAR TEN
SERIAL
CONFIGURATION
PORT
IN–
06589-001
Figure 1.
Table 1. 48-Lead PulSAR Selection
Input Type
Res
(Bits)
100 to
250
(kSPS)
500 to
570
(kSPS)
570 to
1000
(kSPS)
>1000
kSPS
Bipolar 14 AD7951
Differential
Bipolar
14 AD7952
Unipolar 16 AD7651 AD7653
AD7660 AD7650 AD7667
AD7661 AD7652
AD7664
AD7666
Bipolar 16 AD7610 AD7665 AD7612
AD7663 AD7671
Differential 16 AD7675 AD7676 AD7677 AD7621
Unipolar AD7622
AD7623
Simultaneous/ 16 AD7654
Multichannel
Unipolar
AD7655
Differential 18 AD7678 AD7679 AD7674 AD7641
Unipolar AD7643
Differential
Bipolar
18 AD7631 AD7634
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