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| 型号： | AD7870LPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 12BIT SAMPLING 3V 28-PLCC |
| 产品变化通告： | Conversion Time Change |
| 标准包装： | 1 |
| 位数： | 12 |
| 采样率（每秒）： | 100k |
| 数据接口： | 串行，并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 95mW |
| 电压电源： | 双 ± |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-LCC（J 形引线） |
| 供应商设备封装： | 28-PLCC（11.51x11.51） |
| 包装： | 管件 |
| 输入数目和类型： | 1 个单端，双极 |
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LC2MOS Complete,
12-Bit, 100 kHz, Sampling ADCs
AD7870/AD7875/AD7876
Rev. C
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
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
1997–2009 Analog Devices, Inc. All rights reserved.
FEATURES
Complete monolithic 12-bit ADCs with
2 μs track-and-hold amplifier
8 μs ADC
On-chip reference
Laser-trimmed clock
Parallel, byte, and serial digital interface
72 dB SNR at 10 kHz input frequency
(AD7870, AD7875)
57 ns data access time
Low power: 60 mW typical
Variety of input ranges
±3 V for AD7870
0 V to +5 V for AD7875
±10 V for AD7876
FUNCTIONAL BLOCK DIAGRAM
REF OUT
VIN
INPUT
SCALING
12-BIT
DAC
PARALLEL
AND SERIAL
INTERFACE
AD7870/AD7875/
AD7876
CONTROL LOGIC
CLOCK
3V
REFERENCE
SAR +
COUNTER
COMP
TRACK-AND-HOLD
VDD
VSS
DGND
07
73
0-
0
01
DB11
DB0
CS
RD BUSY/INT
AGND
CLK
CONVST
12/8/CLK
Figure 1.
GENERAL DESCRIPTION
The AD7870/AD7875/AD7876 are fast, complete, 12-bit
analog-to-digital converters (ADCs). These converters consist
of a track-and-hold amplifier, an 8 μs successive approximation
ADC, a 3 V buried Zener reference, and versatile interface logic.
The ADCs feature a self-contained internal clock which is laser
trimmed to guarantee accurate control of conversion time. No
external clock timing components are required; the on-chip
clock may be overridden by an external clock if required.
The parts offer a choice of three data output formats: a single,
parallel, 12-bit word; two 8-bit bytes or serial data. Fast bus
access times and standard control inputs ensure easy interfacing
to modern microprocessors and digital signal processors.
All parts operate from ±5 V power supplies. The AD7870 and
AD7876 accept input signal ranges of ±3 V and ±10 V, respec-
tively, while the AD7875 accepts a unipolar 0 V to +5 V input
range. The parts can convert full power signals up to 50 kHz.
The AD7870/AD7875/AD7876 feature dc accuracy specifica-
tions, such as linearity, full-scale and offset error. In addition,
the AD7870 and AD7875 are fully specified for dynamic
performance parameters including distortion and signal-to-
noise ratio.
The parts are available in a 24-pin, 0.3 inch-wide, plastic or
hermetic dual-in-line package (DIP). The AD7870 and AD7875
are available in a 28-pin plastic leaded chip carrier (PLCC),
while the AD7876 is available and in a 24-pin small outline
(SOIC) package.
PRODUCT HIGHLIGHTS
1.
Complete 12-bit ADC on a chip.
The AD7870/AD7875/AD7876 provide all the functions
necessary for analog-to-digital conversion and combine a
12-bit ADC with internal clock, track-and-hold amplifier
and reference on a single chip.
2.
Dynamic specifications for DSP users.
The AD7870 and AD7875 are fully specified and tested for
ac parameters, including signal-to-noise ratio, harmonic
distortion and intermodulation distortion.
3.
Fast microprocessor interface.
Data access times of 57 ns make the parts compatible with
modern 8-bit and 16-bit microprocessors and digital signal
processors. Key digital timing parameters are tested and
guaranteed over the full operating temperature range.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD7870LPZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:LC2MOS Complete, 12-Bit, 100 kHz, Sampling ADCs |
| AD7870SE/883B | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog-to-Digital Converter， 12-Bit |
| AD7870SQ | 功能描述:模数转换器 - ADC 12-Bit 100kHz Sampling RoHS:否 制造商:Analog Devices 通道数量: 结构: 转换速率: 分辨率: 输入类型: 信噪比: 接口类型: 工作电源电压: 最大工作温度: 安装风格: 封装 / 箱体: |
| AD7870SQ/883B | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog-to-Digital Converter， 12-Bit |
| AD7870SQQ10 | 制造商:Analog Devices 功能描述: |
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