LTC1090 Single Chip 10-Bit Data Acquisition System

The LTC™1090 is a data acquisition component which contains a serial I/O successive approximation A/D converter. It uses LTCMOS® switched capacitor technology to perform either 10-bit unipolar, or 9-bit plus sign bipolar A/D conversions. The 8-channel input multiplexer can be configured for either single ended or differential inputs (or combinations thereof). An on-chip sample and hold is included for all single ended input channels.

The serial I/O is designed to be compatible with industry standard full duplex serial interfaces. It allows either MSB or LSB first data and automatically provides 2’s complement output coding in the bipolar mode. The output data word can be programmed for a length of 8, 10, 12 or 16 bits. This allows easy interface to shift registers and a variety of processors.

The LTC1090A is specified with total unadjusted error (including the effects of offset, linearity and gain errors) less than �0.5LSB.

The LTC1090 is specified with offset and linearity less than �0.5LSB but with a gain error limit of �2LSB for applications where gain is adjustable or less critical

产品特点 Features Software Programmable Features Unipolar/Bipolar Conversions 4 Differential/8 Single Ended Inputs MSB or LSB First Data Sequence Variable Data Word Length Built in Sample and Hold Single Supply 5V, 10V or ±5V Operation Direct 4 Wire Interface to Most MPU Serial Ports and All MPU Parallel Ports 30kHz Maximum Throughput Rate 参数	应用 Resolution: 10 Bits Total Unadjusted Error (LTC1090A): ±1/2LSB Max Conversion Time: 22µs Supply Current: 2.5mA Max, 1.0mA Typ 典型应用图

产品特点 Features

Software Programmable Features
Unipolar/Bipolar Conversions
4 Differential/8 Single Ended Inputs
MSB or LSB First Data Sequence
Variable Data Word Length
Built in Sample and Hold
Single Supply 5V, 10V or ±5V Operation
Direct 4 Wire Interface to Most MPU Serial Ports and All MPU Parallel Ports
30kHz Maximum Throughput Rate

参数

应用

Resolution: 10 Bits
Total Unadjusted Error (LTC1090A): ±1/2LSB Max
Conversion Time: 22µs
Supply Current: 2.5mA Max, 1.0mA Typ

典型应用图

LTC1090 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC1090ACN	PDIP	20	C	$17.15	$14.95
LTC1090ACN#PBF	PDIP	20	C	$17.15	$14.95
LTC1090CN	PDIP	20	C	$11.65	$9.45
LTC1090CN#PBF	PDIP	20	C	$11.65	$9.45
LTC1090CSW	SO	20	C	$14.08	$11.40
LTC1090CSW#PBF	SO	20	C	$14.08	$11.40
LTC1090CSW#TR	SO	20	C		$11.50
LTC1090CSW#TRPBF	SO	20	C		$11.50

LTC1090 数据手册及相关资料下载

数据手册(英文) : LTC1090 - Single Chip 10-Bit Data Acquisition System.PDF
应用指南 (英文) : AN62 - Data Acquisition Circuit Collection.PDF
设计要点 (英文) : DN1 - New Data Acquisition Systems Communicate with Microprocessors Over 4 Wires.PDF
设计要点 (英文) : DN10 - Electrically Isolating Data Acquisition Systems.PDF
设计要点 (英文) : DN13 - Closed Loop Control with the LTC1090 Series of Data Acquisition Systems.PDF
设计要点 (英文) : DN2 - Sampling of Signals for Digital Filtering and Gated Measurements.PDF
设计要点 (英文) : DN26 - Auto-Zeroing A/D Offset Voltage.PDF
设计要点 (英文) : DN35 - 12-Bit 8-Channel Data Acquisition System Interfaces to IBM PC Serial Port.PDF
设计要点 (英文) : DN5 - Temperature Measurement Using the LTC1090/91/92 Series of Data Acquisition Systems.PDF
可靠性数据 : R061 Reliability Data .PDF