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AD7694ARMRL7 датащи(PDF) 1 Page - Analog Devices

номер детали AD7694ARMRL7
подробное описание детали  16-Bit, 250 kSPS PulSAR짰 ADC in MSOP
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16-Bit, 250 kSPS PulSAR® ADC in MSOP
AD7694
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
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.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
© 2005 Analog Devices, Inc. All rights reserved.
FEATURES
16-bit resolution with no missing codes
Throughput: 250 kSPS @ 5 V
INL: ±4 LSB max
S/(N + D): 92 dB @ 20 kHz
THD: –106 dB @ 20 kHz
Pseudo-differential analog input range:
0 V to VREF with VREF up to VDD
No pipeline delay
Single-supply operation: 2.7 V or 5 V
Serial interface SPI®/QSPI™/MICROWIRE™/DSP-compatible
Supply Current: 540 μA @ 2.7 V/100 kSPS,
800 μA @ 5 V/100 kSPS
Standby current: 1 nA
8-lead MSOP package
Improved second source to LTC1864 and LTC1864L
APPLICATIONS
Battery-powered equipment
Data acquisition
Instrumentation
Medical instruments
Process control
GENERAL DESCRIPTION
The AD7694 is a 16-bit, charge redistribution, successive
approximation, PulSAR analog-to-digital converter (ADC) that
operates from a single power supply, VDD, between 2.7 V to
5.25 V. It contains a low power, high speed, 16-bit sampling
ADC with no missing codes (B grade), an internal conversion
clock, and a serial, SPI-compatible interface port. The part also
contains a low noise, wide bandwidth, short aperture delay
track-and-hold circuit. On the CNV rising edge, it samples an
analog input, IN+, between 0 V to REF with respect to a ground
sense, IN−. The reference voltage, REF, is applied externally and
can be set up to the supply voltage.
Its power scales linearly with throughput.
The AD7694 is housed in an 8-lead MSOP package with an
operating temperature specified from −40°C to +85°C.
APPLICATION DIAGRAM
AD7694
REF
GND
VDD
IN+
IN–
SCK
SDO
CNV
3-WIRE SPI
INTERFACE
1V TO VDD
2.5V TO 5V
0 TO VREF
Figure 1.
Table 1. MSOP, LFCSP (QFN)/SOT-23, 16-Bit PulSAR ADC
Type
100 kSPS
250 kSPS
500 kSPS
True Differential
AD7684
AD7687
AD7688
Pseudo
AD7683
AD7685
AD7686
Differential/Unipolar
AD7694
Unipolar
AD7680


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