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AD7949 데이터시트(PDF) 1 Page - Analog Devices

부품명 AD7949
상세설명  16-Bit, 4-Channel/8-Channel, 250 kSPS PulSAR ADC
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16-Bit, 4-Channel/8-Channel,
250 kSPS PulSAR ADC
AD7682/AD7689
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringements of patents or other
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
©2008 Analog Devices, Inc. All rights reserved.
FEATURES
16-bit resolution with no missing codes
4-channel (AD7682)/8-channel (AD7689) multiplexer with
choice of inputs
Unipolar single ended
Differential (GND sense)
Pseudobipolar
Throughput: 250 kSPS
INL: ±0.5 LSB typical, ±
1.5 LSB maximum (±23 ppm or FSR)
Dynamic range: 93.8 dB
SINAD: 92.5 dB @ 20 kHz
THD: −100 dB @ 20 kHz
Analog input range: 0 V to VREF with VREF up to VDD
Multiple reference types
Internal selectable 2.5 V or 4.096 V
External buffered (up to 4.096 V)
External (up to VDD)
Internal temperature sensor
Channel sequencer, selectable 1-pole filter, busy indicator
No pipeline delay, SAR architecture
Single-supply 2.7 V to 5.5 V operation with
1.8 V to 5 V logic interface
Serial interface compatible with SPI, MICROWIRE,
QSPI, and DSP
Power dissipation
3.5 mW @ 2.5 V/200 kSPS
12 mW @ 5 V/250 kSPS
Standby current: 50 nA
20-lead 4 mm × 4 mm LFCSP package
APPLICATIONS
Battery-powered equipment
Medical instruments: ECG/EKG
Mobile communications: GPS
Personal digital assistants
Power line monitoring
Data acquisition
Seismic data acquisition systems
Instrumentation
Process control
FUNCTIONAL BLOCK DIAGRAM
AD7682/
AD7689
REF
GND
VDD
VIO
DIN
SCK
SDO
CNV
1.8V
TO
VDD
2.7V TO 5V
SEQUENCER
SPI SERIAL
INTERFACE
MUX
16-BIT SAR
ADC
BAND GAP
REF
TEMP
SENSOR
REFIN
IN0
IN1
IN4
IN5
IN6
IN7
IN3
IN2
COM
0.5V TO VDD
22µF
ONE-POLE
LPF
0.5V TO 4.096V
0.1µF
Figure 1.
Table 1. Multichannel 14-/16-Bit PulSAR® ADC
Type
Channels
250 kSPS
500 kSPS
ADC Driver
14-Bit
8
AD7949
ADA4841-x
16-Bit
4
AD7682
ADA4841-x
16-Bit
8
AD7689
AD7699
ADA4841-x
GENERAL DESCRIPTION
The AD7682/AD7689 are 4-channel/8-channel, 16-bit, charge
redistribution successive approximation register (SAR) analog-
to-digital converters (ADCs) that operate from a single power
supply, VDD.
The AD7682/AD7689 contain all components for use in a
multichannel, low power data acquisition system, including a
true 16-bit SAR ADC with no missing codes; a 4-channel
(AD7682) or 8-channel (AD7689), low crosstalk multiplexer
useful for configuring the inputs as single ended (with or
without ground sense), differential, or bipolar; an internal low
drift reference (selectable 2.5 V or 4.096 V) and buffer; a
temperature sensor; a selectable one-pole filter; and a sequencer
that is useful when channels are continuously scanned in order.
The AD7682/AD7689 use a simple SPI interface for writing to
the configuration register and receiving conversion results. The
SPI interface uses a separate supply, VIO, which is set to the
host logic level. Power dissipation scales with throughput.
Each AD7682/AD7689 is housed in a tiny 20-lead LFCSP with
operation specified from −40°C to +85°C.


유사한 부품 번호 - AD7949

제조업체부품명데이터시트상세설명
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Analog Devices
AD7949 AD-AD7949 Datasheet
1Mb / 20P
   16-Bit, 8-Channel, 250 kSPS PulSAR짰 ADC.
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AD7949 AD-AD7949 Datasheet
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   14-Bit, 8-Channel, 250 kSPS PulSAR ADC
REV. A
AD7949 AD-AD7949 Datasheet
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REV. B
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유사한 설명 - AD7949

제조업체부품명데이터시트상세설명
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Analog Devices
EVAL-AD7689EDZ AD-EVAL-AD7689EDZ Datasheet
1Mb / 32P
   16-Bit, 4-Channel/8-Channel, 250 kSPS PulSAR ADC
REV. D
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   14-Bit, 8-Channel, 250 kSPS PulSAR ADC
REV. B
AD7949 AD-AD7949_17 Datasheet
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   14-Bit, 8-Channel, 250 kSPS PulSAR ADC
AD7949 AD-AD7949 Datasheet
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   14-Bit, 8-Channel, 250 kSPS PulSAR ADC
REV. A
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AD7699 AD-AD7699 Datasheet
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REV. 0
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Rev. PrC
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REV. A
AD7685 AD-AD7685 Datasheet
542Kb / 29P
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AD7694 AD-AD7694_17 Datasheet
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