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AD7988-5 датащи(PDF) 1 Page - Analog Devices

номер детали AD7988-5
подробное описание детали  16-Bit Lower Power
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домашняя страница  http://www.analog.com
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16-Bit Lower Power
PulSAR ADCs in MSOP/LFCSP (QFN)
Data Sheet
AD7988-1/AD7988-5
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
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
©2012 Analog Devices, Inc. All rights reserved.
FEATURES
Low power dissipation
AD7988-5: 3.5 mW @ 500 kSPS
AD7988-1: 700 µW @ 100 kSPS
16-bit resolution with no missing codes
Throughput: 100 kSPS/500 kSPS options
INL: ±0.6 LSB typical, ±1.25 LSB maximum
SINAD: 91.5 dB @ 10 kHz
THD: −114 dB @ 10 kHz
Pseudo differential analog input range
0 V to VREF with VREF from 2.5 V to 5.5 V
Any input range and easy to drive with the ADA4841-1
No pipeline delay
Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V
logic interface
SPI-/QSPI-/MICROWIRE™-/DSP-compatible serial interface
Daisy-chain multiple ADCs
10-lead MSOP and 10-lead, 3 mm × 3 mm LFCSP (QFN),
same space as SOT-23
Wide operating temperature range: −40°C to +125°C
APPLICATIONS
Battery-powered equipment
Low power data acquisition systems
Portable medical instruments
ATE equipment
Data acquisitions
Communications
GENERAL DESCRIPTION
The AD7988-1/AD7988-5 are 16-bit, successive approximation,
analog-to-digital converters (ADC) that operate from a single
power supply, VDD. The AD7988-1 offers a 100 kSPS throughput,
and the AD7988-5 offers a 500 kSPS throughput. They are low
power, 16-bit sampling ADCs with a versatile serial interface
port. On the CNV rising edge, they sample an analog input,
IN+, between 0 V to VREF with respect to a ground sense, IN−.
The reference voltage, REF, is applied externally and can be set
independent of the supply voltage, VDD.
The SPI-compatible serial interface also features the ability to
daisy-chain several ADCs on a single 3-wire bus using the SDI
input. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic using
the separate supply, VIO.
The AD7988-1/AD7988-5 generics are housed in a 10-lead
MSOP or a 10-lead LFCSP (QFN) with operation specified
from −40°C to +125°C.
Table 1. MSOP, LFCSP (QFN) 14-/16-/18-Bit PulSAR® ADCs
Bits
100 kSPS
250 kSPS
400 kSPS to
500 kSPS
≥1000
kSPS
ADC Driver
181
AD76912
AD76902
AD79822
AD79842
ADA4941-1
ADA4841-1
161
AD7684
AD76872
AD76882
AD76932
ADA4941-1
ADA4841-1
163
AD7680
AD7683
AD7988-12
AD76852
AD7694
AD76862
AD7988-52
AD79802
ADA4841-1
ADA4841-1
ADA4841-1
143
AD7940
AD79422
AD79462
ADA4841-1
1
True differential.
2
Pin-for-pin compatible.
3
Pseudo differential.
TYPICAL APPLICATION DIAGRAM
REF
GND
VDD
IN+
IN–
VIO
SDI
SCK
SDO
CNV
1.8V TO 5.5V
3- OR 4-WIRE INTERFACE
(SPI, DAISY CHAIN, CS)
2.5V TO 5V
2.5V
0V TO VREF
AD7988-1/
AD7988-5
Figure 1.


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