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AD7694 Datasheet

  • AD7694

  • 16-Bit, 250 kSPS PulSAR? ADC in MSOP

  • 1120.00KB

  • 18頁(yè)

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16-Bit, 250 kSPS PulSAR
ADC in MSOP
AD7694
FEATURES
16-bit resolution with no missing codes
Throughput: 250 kSPS @ 5 V
INL: 鹵4 LSB max
S/(N + D): 92 dB @ 20 kHz
THD: 鈥?06 dB @ 20 kHz
Pseudo-differential analog input range:
0 V to V
REF
with V
REF
up to VDD
No pipeline delay
Single-supply operation: 2.7 V or 5 V
Serial interface SPI廬/QSPI鈩?MICROWIRE鈩?DSP-compatible
Supply Current: 540 碌A(chǔ) @ 2.7 V/100 kSPS,
800 碌A(chǔ) @ 5 V/100 kSPS
Standby current: 1 nA
8-lead MSOP package
Improved 2
nd
Source to LTC1864 and LTC1864L
APPLICATION DIAGRAM
1V TO VDD
2.5V TO 5V
0 TO V
REF
IN+
IN鈥?/div>
REF
VDD
SCK
SDO
CNV
3-WIRE SPI
INTERFACE
05003-001
AD7694
GND
Figure 1.
Table 1. MSOP, QFN (LFCSP)/SOT-23, 16-Bit PulSAR ADC
Type
True Differential
Pseudo
Differential/Unipolar
Unipolar
100 kSPS
AD7684
AD7683
AD7680
250 kSPS
AD7687
AD7685
AD7694
500 kSPS
AD7688
AD7686
APPLICATIONS
Battery-powered equipment
Data acquisition
Instrumentation
Medical instruments
Process control
GENERAL DESCRIPTION
The AD7694 is a 16-bit, charge redistribution, successive
approximation, PulSAR鈩?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鈭? 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 鈭?0擄C to +85擄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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703
漏 2004 Analog Devices, Inc. All rights reserved.

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