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ALD500A

更新时间： 2024-02-11 08:00:17
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先进线性 - ALD /
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11页 92K
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PRECISION INTEGRATING ANALOG PROCESSOR

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ALD500A 技术参数

是否Rohs认证： 不符合生命周期：Contact Manufacturer
零件包装代码：SOIC包装说明：SOP, SOP16,.4
针数：16Reach Compliance Code：unknown
HTS代码：8542.39.00.01风险等级：5.63
Is Samacsys：N模拟集成电路 - 其他类型：ANALOG CIRCUIT
JESD-30 代码：R-PDSO-G16湿度敏感等级：1
标称负供电电压 (Vsup)：-5 V端子数量：16
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装等效代码：SOP16,.4封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：225
电源：+-5 V认证状态：Not Qualified
子类别：Other Analog ICs最大供电电流 (Isup)：1 mA
标称供电电压 (Vsup)：5 V表面贴装：YES
温度等级：COMMERCIAL端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIEDBase Number Matches：1

ALD500A 数据手册

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ADVANCED  
LINEAR  
DEVICES, INC.  
ALD500AU/ALD500A/ALD500  
PRECISION INTEGRATING ANALOG PROCESSOR  
BENEFITS  
APPLICATIONS  
• 4 1/2 digits to 5 1/2 digits plus sign measurements  
• Precision analog signal processor  
• Precision sensor interface  
• High accuracy DC measurement functions  
• Portable battery operated instruments  
• Computer peripheral  
• Wide dynamic signal range  
• Very high noise immunity  
• Low cost, simple functionality  
• Automatic compensation and cancellation of  
error sources  
• Easy to use to acquire true 18 bit,17 bit, or  
16 bit conversion and noise performance  
• Inherently linear and stable with temperature  
and component variations  
• PCMCIA  
GENERAL DESCRIPTION  
The ALD500AU/ALD500A/ALD500 are integrating dual slope analog  
processors, designed to operate on ±5V power supplies for building  
precision analog-to-digital converters. The ALD500AU/ALD500A/  
ALD500 feature specifications suitable for 18 bit/17 bit/16 bit resolution  
conversion, respectively. Together with three capacitors, one resistor,  
a precision voltage reference, and a digital controller, a precision  
Analog to Digital converter with auto zero can be implemented. The  
digital controller can be implemented by an external microcontroller,  
under either hardware (fixed logic) or software control. For ultra high  
resolutionapplications,upto23bitconversioncanbeimplementedwith  
an appropriate digital controller and software.  
FEATURES  
• Resolution up to 18 bits plus sign bit  
and over-range bit  
• Accuracy independent of input source  
impedances  
• High input impedance of 1012  
Ω
• Inherently filters and integrates any  
external noise spikes  
• Differential analog input  
• Wide bipolar analog input voltage  
range ±3.5V  
The ALD500 series of analog processors accept differential inputs and  
the external digital controller first counts the number of pulses at a fixed  
clock rate that a capacitor requires to integrate against an unknown  
analog input voltage, then counts the number of pulses required to  
deintegrate the capacitor against a known reference voltage. This  
unknown analog voltage can then be converted by the microcontroller  
to a digital word, which is translated into a high resolution number,  
representing an accurate reading. This reading, when ratioed against  
thereferencevoltage,yieldsanaccurate,absolutevoltagemeasurement  
reading.  
• Automatic zero offset compensation  
• Low linearity error - as low as 0.002%  
• Fast zero-crossing comparator - 1µs  
• Low power dissipation - 6mW typical  
• Automatic internal polarity detection  
• Low input current - 2pA typical  
• Microprocessor controlled conversion  
• Optional digital control from a microcon-  
troller, an ASIC, or a dedicated digital circuit  
• Flexible conversion speed versus resolution  
trade-off  
TheALD500analogprocessorsconsistofon-chipdigitalcontrolcircuitry  
to accept control inputs, integrating buffer amplifiers, analog switches,  
and voltage comparators. It functions in four operating modes, or  
phases, namely auto zero, integrate, deintegrate, and integrator zero  
phases. At the end of a conversion, the comparator output goes from  
high to low when the integrator crosses zero during deintegration.  
ALD500 analog processors also provide direct logic interface to CMOS  
logic families.  
PIN CONFIGURATION  
ALD500  
+
V
1
2
3
4
5
6
7
8
C
16  
15  
14  
13  
12  
11  
10  
9
INT  
-
DGND  
V
C
AZ  
UF  
C
OUT  
ORDERING INFORMATION  
Operating Temperature Range *  
B
B
A
0°C to +70°C  
0°C to +70°C  
0°C to +70°C  
AGND  
16-Pin  
Plastic Pin  
Package  
16-Pin  
Small Outline  
Package (SOIC)  
16-Pin Wide Body  
Small Outline  
Package (SOIC)  
-
C
+
V
REF  
IN  
+
-
V
C
REF  
REF  
IN  
-
+
V
V
REF  
ALD500PC (16 bit)  
ALD500APC (17 bit)  
ALD500AUPC (18 bit)  
ALD500SC (16 bit)  
ALD500ASC (17 bit)  
ALD500AUSC (18 bit) ALD500AUSWC (18 bit)  
ALD500SWC (16 bit)  
ALD500ASWC (17 bit)  
PC, SC, SWC PACKAGE  
* Contact factory for industrial temperature range  
Rev. 1.02 © 1999 Advanced Linear Devices, Inc., 415 Tasman Drive, Sunnyvale, California 94089-1706, Tel: (408) 747-1155, Fax: (408) 747-1286  
http://www.aldinc.com  
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 		PRECISION INTEGRATING ANALOG PROCESSOR WITH PRECISION VOLTAGE REFERENCE
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