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參數(shù)資料
| 型號： | ALD500A |
| 廠商： | Advanced Linear Devices, Inc. |
| 英文描述： | PRECISION INTEGRATING ANALOG PROCESSOR |
| 中文描述： | 精密集成了模擬處理器 |
| 文件頁數(shù)： | 1/11頁 |
| 文件大?。?/td> | 88K |
| 代理商： | ALD500A |
Operating Temperature Range *
0
°C to +70°C0°C to +70°C0°C to +70°C
16-Pin
16-Pin Wide Body
Plastic Pin
Small Outline
Package
Package (SOIC)
ALD500PC (16 bit)
ALD500SC (16 bit)
ALD500SWC (16 bit)
ALD500APC (17 bit)
ALD500ASC (17 bit)
ALD500ASWC (17 bit)
ALD500AUPC (18 bit)
ALD500AUSC (18 bit)
ALD500AUSWC (18 bit)
* Contact factory for industrial temperature range
BENEFITS
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
FEATURES
Resolution up to 18 bits plus sign bit
and over-range bit
Accuracy independent of input source
impedances
High input impedance of 1012
Inherently filters and integrates any
external noise spikes
Differential analog input
Wide bipolar analog input voltage
range
±3.5V
Automatic zero offset compensation
Low linearity error - as low as 0.002%
Fast zero-crossing comparator - 1
s
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
ALD500AU/ALD500A/ALD500
ADVANCED
LINEAR
DEVICES, INC.
ORDERING INFORMATION
PRECISION INTEGRATING ANALOG PROCESSOR
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
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
resolution applications, up to 23 bit conversion can be implemented with
an appropriate digital controller and software.
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
the reference voltage, yields an accurate, absolute voltage measurement
reading.
The ALD500 analog processors consist of on-chip digital control circuitry
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.
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
PIN CONFIGURATION
V+
1
2
3
14
15
16
4
13
B
5
12
A
V+REF
6
7
8
10
11
V-
CAZ
CINT
BUF
AGND
V-REF
C+REF
9
V-IN
V+IN
COUT
DGND
PC, SC, SWC PACKAGE
C-REF
ALD500
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ALD500APC | PRECISION INTEGRATING ANALOG PROCESSOR |
| ALD500ASC | PRECISION INTEGRATING ANALOG PROCESSOR |
| ALD500AU | PRECISION INTEGRATING ANALOG PROCESSOR |
| ALD500AUPC | PRECISION INTEGRATING ANALOG PROCESSOR |
| ALD500PC | PRECISION INTEGRATING ANALOG PROCESSOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ALD500APC | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 17 Bit A/D Processor RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ALD500APCIL | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 17 Bit A/D Processor RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ALD500APCL | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 17 Bit A/D Processor RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ALD500ASC | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 17 Bit A/D Processor RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| ALD500ASCL | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 17 Bit A/D Processor RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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