TI公司的ADS1113, ADS1114和ADS1115是超小型16位精密模數轉換器(ADC),具有板載基準電壓和振蕩器,通過I2C兼容接口傳輸數據,工作電壓從2.0V到5.5V,取樣頻率高達860SPS,.連續模式的功耗僅為150uA, 工作溫度從–40℃ 到+140℃,可用在手提儀表,消費類產品,電池監視,溫度
測量以及工廠自動化和過程控制.本文介紹了ADS1113, ADS1114和ADS1115的主要特性,方框圖, 基本硬件配置圖, 典型連接圖, 多個ADS1113/4/5連接圖以及評估板ADS1015EVM/ADS1115EVM電路圖和材料清單.
The ADS1113, ADS1114, and ADS1115 are precision analog-to-digital converters (ADCs) with 16 bits of resolution offered in an ultra-small, leadless QFN-10 package or an MSOP-10 package. The ADS1113/4/5 are designed with precision, power, and ease of implementation in mind. The ADS1113/4/5 feature an onboard reference and oscillator. Data are transferred via an I
2C-compatible serial interface; four I
2C slave addresses can be selected. The ADS1113/4/5 operate from a single power supply ranging from 2.0V to 5.5V.
The ADS1113/4/5 can perform conversions at rates up to 860 samples per second (SPS). An onboard PGA is available on the ADS1114 and ADS1115 that offers input ranges from the supply to as low as ±256mV, allowing both large and small signals to be measured with high resolution. The ADS1115 also features an input multiplexer (MUX) that provides two differential or four single-ended inputs.
The ADS1113/4/5 operate either in continuous conversion mode or a single-shot mode that automatically powers down after a conversion and greatly reduces current consumption during idle periods. The ADS1113/4/5 are specified from –40℃to +125℃.
ADS1115主要特性:
ULTRA-SMALL QFN PACKAGE:
2mm × 1,5mm × 0,4mm
WIDE SUPPLY RANGE: 2.0V to 5.5V
LOW CURRENT CONSUMPTION:
Continuous Mode: Only 150µA
Single-Shot Mode: Auto Shut-Down
PROGRAMMABLE DATA RATE:
8SPS to 860SPS
INTERNAL LOW-DRIFT
VOLTAGE REFERENCE
INTERNAL OSCILLATOR
INTERNAL PGA
I
2C INTE
RFACE: Pin-Selectable Addresses
FOUR SINGLE-ENDED OR TWO DIFFERENTIAL INPUTS (ADS1115)
PROGRAMMABLE COMPARATOR (ADS1114 and ADS1115)
OPERATING TEMPERATURE: –40℃ to +140℃
ADS1115應用:
PORTABLE INSTRUMENTATION
CONSUMER GOODS
BATTERY MONITORING
TEMPERATURE MEASUREMENT
FACTORY AUTOMATION AND PROCESS CONTROLS
圖1.ADS1115功能方框圖
圖2.ADS1115基本硬件配置圖
圖3.ADS1115典型連接圖
圖4.多個ADS1113/4/5連接圖
圖5.多個器件類型連接圖
圖6.ADS1115EVM (左)和ADS1115EVM-PDK (右)外形圖
ADS1015EVM/ADS1115EVM 評估板主要特性:
Contains all support circuitry needed for the ADS1015/ADS1115
Two ADS1015/ADS1115 devices onboard to demonstrate I2C™ bus functionality
+3.3, +5V, or external power supply options for ADC
Compatible with the TI Modular EVM System
ADS1015EVM-PDK/ADS1115EVM-PDK 主要特性:
Easy-to-use evaluation software for Microsoft® Windows® XP
Data collection to text files
Built-in analysis tools including scope, FFT, and histogram displays
Complete control of board settings
Easily expandable with new analysis plug-in tools from Texas Instruments
圖7.MMB3方框圖
圖8. ADS1015EVM/ADS1115EVM電路圖
ADS1015EVM/ADS1115EVM 材料清單:
