ADS7868中文资料1.2V 8 位 280KSPS 串行 ADC数据手册TI规格书

描述 Description

The ADS7866/67/68 are low power, miniature, 12/10/8-bit A/D converters each with a unipolar, single-ended input. These devices can operate from a single 1.6 V to 3.6 V supply with a 200-KSPS throughput for ADS7866. In addition, these devices can maintain at least a 100-KSPS throughput with a supply as low as 1.2 V.
The sampling, conversion, and activation of digital output SDO are initiated on the falling edge of CS\\. The serial clock SCLK is used for controlling the conversion rate and shifting data out of the converter. Furthermore, SCLK provides a mechanism to allow digital host processors to synchronize with the con- verter. These converters interface with micro-processors or DSPs through a high-speed SPI compatible serial interface. There are no pipeline delays associated with the device.
The minimum conversion time is determined by the frequency of the serial clock input, SCLK, while the maximum frequency of SCLK is determined by the minimum sampling time required to charge the input capacitance to 12/10/8-bit accuracy for the ADS7866/67/68, respectively. The maximum throughput is determined by how often a conversion is initiated when the minimum sampling time is met and the maximum SCLK frequency is used. Each device automatically powers down after each conversion, which allows each device to save power when the throughput is reduced while using the maximum SCLK frequency.
The converter reference is taken internally from the supply. Hence, the analog input range for these devices is 0 V to VDD.
These devices are available in a 6-pin SOT-23 package and are characterized over the industrial –40°C to 85°C temperature range.

特性 Features

• Single 1.2-V to 3.6-V Supply Operation
• 200/240/280KSPS for 12/10/8-Bit VDD 1.6 V
• ±1.5LSB INL, 12-Bit NMC (ADS7866)
• Synchronized Conversion with SCLK
• No Pipeline Delays
• 1.39 mW Typ at 200 KSPS, VDD = 3.6 V
• 0.22 mW Typ at 100 KSPS, VDD = 1.2 V
• Auto Power-Down: 8 nA Typ, 300 nA Max
• 6-Pin SOT-23 Package
• Battery Powered Systems
• Medical Instruments
• Portable Data Acquisition Systems
• Automatic Test Equipment

简介

ADS7868属于集成电路（IC）的模数转换器（ADC）。由TI制造生产的ADS7868模数转换器（ADC）模数转换器（ADC、A/D 或 A 转 D）对模拟信号进行采样，例如由麦克风采集的声音或传感器的输出，然后将其转换为数字信号。一般来说，数字输出是二进制补码二进制数，与输入成比例。输入类型可能是差分、伪差分或单端输入。模数转换器可按照位数、采样率、输入数、接口、转换器数和架构（例如自适应增量、双斜率、折叠、流水线、SAR、三角积分、两步式）进行选择。