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AD7871JNZ 数据手册 - ADI（亚德诺）
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ADI（亚德诺）
分类:
AD转换器
封装:
PDIP-28
描述:
ANALOG DEVICES AD7871JNZ 模数转换器, 14 bit, 83 kSPS, 双 (+/-), -4.75 V, 5.25 V, DIP
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AD7871JNZ数据手册
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LC
2
MOS
Complete 14-Bit, Sampling ADCs
Data Sheet
AD7871/AD7872
FEATURES
Complete monolithic 14-bit ADC
Twos complement coding
Parallel, byte, and serial digital interface
80 dB SNR at 10 kHz input frequency
57 ns data access time
Low power: 50 mW typ
83 kSPS throughput rate
APPLICATIONS
Digital signal processing
High speed modems
Speech recognition and synthesis
Spectrum analysis
DSP servo control
GENERAL DESCRIPTION
The AD7871/AD7872 are fast, complete, 14-bit analog-to-
digital converters (ADC). They consist of a track-and-hold
amplifier, successive approximation ADC, 3 V buried Zener
reference, and versatile interface logic. The ADC features a self-
contained, laser trimmed internal clock, so no external clock
timing components are required. The on-chip clock may be
overridden to synchronize ADC operation to the digital system
for minimum noise.
The AD7871 offers a choice of three data output formats: a
single, parallel, 14-bit word; two 8-bit bytes or a 14-bit serial
data stream. The AD7872 is a serial output device only. The two
parts are capable of interfacing to all modern microprocessors
and digital signal processors.
The AD7871/AD7872 operate from ±5 V power supplies,
accept bipolar input signals of ±3 V and can convert full power
signals up to 41.5 kHz.
In addition to the traditional dc accuracy specifications, the
AD7871/AD7872 are also fully specified for dynamic
performance parameters including distortion and signal-to-
noise ratio.
FUNCTIONAL BLOCK DIAGRAMS
Figure 1.
Figure 2.
Both devices are fabricated in Analog Devices, Inc., LC
2
MOS
mixed technology process. The AD7871 is available in 28-pin
P D I P, P LCC, and CERDIP packages. The AD7872 is available in
a 16-pin PD I P, CERDIP, and SOIC packages.
PRODUCT HIGHLIGHTS
1. Complete 14-Bit ADC on a Chip.
2. Dynamic Specifications for DSP Users.
3. Low Power.
REF OUT
14-BIT
DAC
PARALLEL
AND SERIAL
INTERFACE
AD7871
CONTROL
LOGIC
CLOCK
3V
REFERENCE
SAR +
COUNTER
COMP
TRACK-
AND-HOLD
V
DD
V
SS
DGNDDB13 DB0
CS
RD BUSY/INT
AGND
CLK
CONVST
14/8/CLK
22
5
28
1
2
3 4
6 20 14
27
25
C
REF
23
V
IN
26 21
R
R
12889-001
REF OUT
14-BIT
DAC
SERIAL
INTERFACE
AD7872
CONTROL
LOGIC
CLOCK
3V
REFERENCE
SAR +
COUNTER
COMP
TRACK-
AND-HOLD
AGND
CLK
CONVST
CONTROL
12
3
1
2
SSTRB
4
SCLK
5
SDATA
6
DGND
8
V
SS
15
13
C
REF
11
V
IN
14
V
DD
9
V
DD
16
R
R
12889-002
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 of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2015 Analog Devices, Inc. All rights reserved.
Technical Support www.analog.com
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