AD7623_15 Datasheet, PDF (1/28 Pages) Analog Devices – 16-Bit, 1.33 MSPS PulSAR

FEATURES
Throughput: 1.33 MSPS
2.048 V internal reference
Differential input range: ±VREF (VREF up to 2.5 V)
INL: ±1 LSB typical
16-bit resolution with no missing codes
SINAD: 88 dB typical @ 100 kHz
THD: −97 dB typical @ 100 kHz
No pipeline delay (SAR architecture)
Parallel (16- or 8-bit bus) and serial 5 V/3.3 V/2.5 V interface
SPI®-/QSPI™-/MICROWIRE™-/DSP-compatible
2.5 V single-supply operation
Power dissipation: 45 mW typical @ 1.33 MSPS
48-lead LQFP and LFCSP_VQ packages
Speed upgrade of the AD7677
APPLICATIONS
Medical instruments
High speed data acquisition
Digital signal processing
Communications
Instrumentation
Spectrum analysis
ATE
GENERAL DESCRIPTION
The AD7623 is a 16-bit, 1.33 MSPS, charge redistribution SAR,
fully differential analog-to-digital converter (ADC) that
operates from a single 2.5 V power supply. It 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. Power consump-
tion is automatically scaled with throughput, making it ideal
for battery-powered applications. It is available in 48-lead, low
profile quad flat package (LQFP) and a lead frame chip-scale
(LFCSP_VQ) package. Operation is specified from
−40°C to +85°C.
Rev. 0
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.
Specifications subject to change without notice. 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 owners.
16-Bit, 1.33 MSPS PulSAR^® ADC
AD7623
FUNCTIONAL BLOCK DIAGRAM
TEMP REFBUFIN REF REFGND
DVDD DGND
AGND
AVDD
IN+
IN–
PDREF
PDBUF
PD
RESET
REF
REF AMP
SWITCHED
CAP DAC
AD7623
SERIAL
PORT
16
PARALLEL
INTERFACE
CLOCK
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
OVDD
OGND
D[15:0]
SER/PAR
BUSY
RD
CS
OB/2C
BYTESWAP
CNVST
Figure 1.
Table 1. PulSAR Selection
Type/kSPS
Pseudo
Differential
True Bipolar
True
Differential
18-Bit
Multichannel/
Simultaneous
100 to 250
AD7651
AD7660/61
AD7663
AD7675
AD7678
500 to 570
AD7650/52
AD7664/66
AD7665
AD7676
AD7679
AD7654
800 to
1000
AD7653
AD7667
AD7671
AD7677
AD7674
AD7655
>1000
AD7621
AD7623
AD7641
PRODUCT HIGHLIGHTS
1. Fast Throughput.
The AD7623 is a 1.33 MSPS, charge redistribution,
16-bit SAR ADC.
2. Superior Linearity.
The AD7623 has no missing 16-bit code.
3. Internal Reference.
The AD7623 has a 2.048 V internal reference with a
typical drift of ±7 ppm/°C.
4. Single-Supply Operation.
The AD7623 operates from a 2.5 V single supply and
typically dissipates 45 mW. Its power dissipation decreases
with the throughput.
5. Serial or Parallel Interface.
Versatile parallel (16- or 8-bit bus) or 2-wire serial interface
arrangement compatible with 2.5 V, 3.3 V, or 5 V logic.
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