AD7952 Datasheet, PDF (1/32 Pages) Analog Devices – 14-Bit, 1 MSPS, Differential, Programmable Input PulSAR ADC

14-Bit, 1 MSPS, Differential,
Programmable Input PulSAR^® ADC
AD7952
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.
Rev. 0
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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
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FUNCTIONAL BLOCK DIAGRAM
TEMP REFBUFIN REF REFGND VCC VEE DVDD DGND
AGND
AVDD
PDREF
PDBUF
IN+
IN–
REF
AMP
REF
SWITCHED
CAP DAC
CNVST
PD
RESET
CLOCK
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
AD7952
SERIAL DATA
PORT
SERIAL
CONFIGURATION
PORT
14
PARALLEL
INTERFACE
OVDD
OGND
D[13:0]
SER/PAR
BYTESWAP
OB/2C
BUSY
RD
CS
WARP IMPULSE BIPOLAR TEN
Figure 1.
Table 1. 48-Lead PulSAR Selection
Input Type
100 to
Res 250
(Bits) (kSPS)
500 to
570
(kSPS)
Bipolar
14
Differential
14
Bipolar
Unipolar
16
AD7651
AD7660 AD7650
AD7661 AD7652
AD7664
AD7666
Bipolar
16
AD7610 AD7665
AD7663
Differential
16
AD7675 AD7676
Unipolar
Simultaneous/ 16
Multichannel
Unipolar
Differential
18
Unipolar
Differential
18
Bipolar
AD7654
AD7655
AD7678 AD7679
AD7631
570 to
1000
(kSPS)
AD7951
AD7952
>1000
kSPS
AD7653
AD7667
AD7612
AD7671
AD7677
AD7621
AD7622
AD7623
AD7674
AD7634
AD7641
AD7643
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