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AD7655ASTZRL Arkusz danych(PDF) 1 Page - Analog Devices

Numer części AD7655ASTZRL
Szczegółowy opis  Low Cost, 4-Channel, 16-Bit, 500 kSPS PulSAR ADC
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AD7655ASTZRL Arkusz danych(HTML) 1 Page - Analog Devices

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Low Cost, 4-Channel,
16-Bit, 500 kSPS PulSAR ADC
Data Sheet
AD7655
Rev. E
Document Feedback
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 oftheir respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2002–2016 Analog Devices, Inc. All rights reserved.
Technica l Support
www.analog.com
FEATURES
4-channel, 16-bit resolution ADC
2 track-and-hold amplifiers
Throughput
500 kSPS (normal mode)
444 kSPS (impulse mode)
Analog input voltage range: 0 V to 5 V
No pipeline delay
Parallel and serial 5 V/3 V interface
SPI®/QSPI™/MICROWIRE™/DSP compatible
Single 5 V supply operation
Power dissipation
120 mW typical
2.6 mW at 10 kSPS
Package
48-lead quad flat package (LQFP)
48-lead frame chip scale package (LFCSP)
Pin-to-pin compatible with the AD7654
Low cost
APPLICATIONS
AC motor control
3-phase power control
4-channel data acquisition
Uninterrupted power supplies
Communications
GENERAL DESCRIPTION
The AD7655 is a low cost, simultaneous sampling, dual-channel,
16-bit, charge redistribution SAR, analog-to-digital converter
that operates from a single 5 V power supply. It contains two
low noise, wide bandwidth, track-and-hold amplifiers that allow
simultaneous sampling, a high speed 16-bit sampling ADC, an
internal conversion clock, error correction circuits, and both
serial and parallel system interface ports. Each track-and-hold
has a multiplexer in front to provide a 4-channel input ADC.
The A0 multiplexer control input allows the choice of
simultaneously sampling input pairs INA1/INB1 (A0 = low) or
INA2/INB2 (A0 = high). The part features a very high sampling
rate mode (normal) and, for low power applications, a reduced
power mode (impulse) where the power is scaled with the
throughput. Operation is specified from −40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
CONTROL LOGIC AND
CALIBRATION CIRCUITRY
A/B
16
D[15:0]
BUSY
CS
SER/PAR
OGND
OVDD
DGND
DVDD
SERIAL
PORT
BYTESWAP
RD
AVDD AGND
REFx
REFGND
PD
RESET
CNVST
INAN
SWITCHED
CAP DAC
AD7655
INA1
IMPULSE
MUX
EOC
INA2
A0
INB1
INBN
INB2
TRACK/HOLD
×2
PARALLEL
INTERFACE
CLOCK
MUX
MUX
Figure 1.
Table 1. PulSAR® Selection
Type/kSPS
100 to 250
500 to 570
800 to
1000
>1000
Pseudo Differential
AD7660/
AD7661
AD7650/
AD7652
AD7653
AD7664/
AD7666
AD7667
True Bipolar
AD7663
AD7665
AD7671
True Differential
AD7675
AD7676
AD7677
AD7621
AD7623
18 Bit
AD7678
AD7679
AD7674
AD7641
Multichannel/
Simultaneous
AD7654/
AD7655
PRODUCT HIGHLIGHTS
1. Multichannel ADC.
The AD7655 features 4-channel inputs with two
sample-and-hold circuits that allow simultaneous sampling.
2. Fast Throughput.
The AD7655 is a 500 kSPS, charge redistribution, 16-bit
SAR ADC with internal error correction circuitry.
3. Single-Supply Operation.
The AD7655 operates from a single 5 V supply. In impulse
mode, its power dissipation decreases with throughput.
4. Serial or Parallel Interface.
Versatile parallel or 2-wire serial interface arrangements
are compatible with both 3 V and 5 V logic.


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