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AD670KNZ PDF预览

AD670KNZ

更新时间: 2024-01-25 10:04:35
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
12页 366K
描述
IC 2-CH 8-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDIP20, PLASTIC, DIP-20, Analog to Digital Converter

AD670KNZ 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
Reach Compliance Code:not_compliantHTS代码:8542.39.00.01
风险等级:5.91最大模拟输入电压:2.55 V
转换器类型:A/D CONVERTERJESD-30 代码:S-XQCC-N20
JESD-609代码:e0最大线性误差 (EL):0.4%
位数:8功能数量:1
端子数量:20最高工作温度:125 °C
最低工作温度:-55 °C输出位码:OFFSET BINARY
封装主体材料:CERAMIC封装代码:QCCN
封装等效代码:LCC20,.35SQ封装形状:SQUARE
封装形式:CHIP CARRIER电源:5 V
认证状态:Not Qualified子类别:Analog to Digital Converters
标称供电电压:5 V表面贴装:YES
技术:BIPOLAR温度等级:MILITARY
端子面层:Tin/Lead (Sn/Pb)端子形式:NO LEAD
端子节距:1.27 mm端子位置:QUAD
Base Number Matches:1

AD670KNZ 数据手册

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Low Cost Signal  
Conditioning 8-Bit ADC  
a
AD670  
FUNCTIONAL BLOCK DIAGRAM  
FEATURES  
Complete 8-Bit Signal Conditioning A/D Converter  
Including Instrumentation Amp and Reference  
Microprocessor Bus Interface  
10 s Conversion Speed  
Flexible Input Stage: Instrumentation Amp Front End  
Provides Differential Inputs and High Common-Mode  
Rejection  
No User Trims Required  
No Missing Codes Over Temperature  
Single +5 V Supply Operation  
Convenient Input Ranges  
20-Pin DIP or Surface-Mount Package  
Low Cost Monolithic Construction  
MIL-STD-883B Compliant Versions Available  
GENERAL DESCRIPTION  
The S grade is also available with optional processing to  
MIL-STD-883 in 20-pin ceramic DIP or 20-terminal LCC  
packages. The Analog Devices Military Products Databook  
should be consulted for detailed specifications.  
The AD670 is a complete 8-bit signal conditioning analog-  
to-digital converter. It consists of an instrumentation amplifier  
front end along with a DAC, comparator, successive approxima-  
tion register (SAR), precision voltage reference, and a three-  
state output buffer on a single monolithic chip. No external  
components or user trims are required to interface, with full  
accuracy, an analog system to an 8-bit data bus. The AD670  
will operate on the +5 V system supply. The input stage pro-  
vides differential inputs with excellent common-mode rejection  
and allows direct interface to a variety of transducers.  
PRODUCT HIGHLIGHTS  
1. The AD670 is a complete 8-bit A/D including three-state  
outputs and microprocessor control for direct connection to  
8-bit data buses. No external components are required to  
perform a conversion.  
2. The flexible input stage features a differential instrumenta-  
tion amp input with excellent common-mode rejection. This  
allows direct interface to a variety of transducers without  
preamplification.  
The device is configured with input scaling resistors to permit  
two input ranges: 0 mV to 255 mV (1 mV/LSB) and 0 to 2.55 V  
(10 mV/LSB). The AD670 can be configured for both unipolar  
and bipolar inputs over these ranges. The differential inputs and  
common-mode rejection of this front end are useful in applica-  
tions such as conversion of transducer signals superimposed on  
common-mode voltages.  
3. No user trims are required for 8-bit accurate performance.  
4. Operation from a single +5 V supply allows the AD670 to  
run off of the microprocessor’s supply.  
5. Four convenient input ranges (two unipolar and two bipolar)  
are available through internal scaling resistors: 0 mV to  
255 mV (1 mV/LSB) and 0 V to 2.55 V (10 mV/LSB).  
The AD670 incorporates advanced circuit design and proven  
processing technology. The successive approximation function  
is implemented with I2L (integrated injection logic). Thin-film  
SiCr resistors provide the stability required to prevent missing  
codes over the entire operating temperature range while laser  
wafer trimming of the resistor ladder permits calibration of the  
device to within ±1 LSB. Thus, no user trims for gain or offset  
are required. Conversion time of the device is 10 µs.  
6. Software control of the output mode is provided. The user  
can easily select unipolar or bipolar inputs and binary or 2s  
complement output codes.  
The AD670 is available in four package types and five grades.  
The J and K grades are specified over 0°C to +70°C and come  
in 20-pin plastic DIP packages or 20-terminal PLCC packages.  
The A and B grades (–40°C to +85°C) and the S grade (–55°C  
to +125°C) come in 20-pin ceramic DIP packages.  
REV. A  
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  
which may result from its use. No license is granted by implication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 617/329-4700  
Fax: 617/326-8703  

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