ADS7955QDBTRQ1集成电路（IC）的模数转换器（ADC）规格书PDF中文资料

ADS7955QDBTRQ1属于集成电路（IC）的模数转换器（ADC）。由美国德州仪器公司制造生产的ADS7955QDBTRQ1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。

1FEATURES

• Qualified for Automotive Applications

• 1-MHz Sample Rate Serial Devices

• 10-Bit Resolution

• Zero Latency

• 20-MHz Serial Interface

• Analog Supply Range: 2.7 to 5.25 V

• I/O Supply Range: 1.7 to 5.25 V

• Two SW Selectable Unipolar, Input Ranges: 0

to 2.5V and 0 to 5V

• Auto and Manual Modes for Channel Selection

• 8-Channel Device can Share 16 Channel

Device Footprint

• Two Programmable Alarm Levels per Channel

• Four Individually Configurable GPIOs for

TSSOP Package Devices

• Typical Power Dissipation: 14.5 mW (+VA = 5

V, +VBD = 3 V) at 1 MSPS

• Power-Down Current (1 μA)

• Input Bandwidth (47 MHz at 3 dB)

• 30-Pin TSSOP Package

APPLICATIONS

• PLC / IPC

• Battery Powered Systems

• Medical Instrumentation

• Digital Power Supplies

• Touch Screen Controllers

• High-Speed Data Acquisition Systems

• High-Speed Closed-Loop Systems

DESCRIPTION

The ADS7955-Q1 is a 10-bit multichannel

analog-to-digital converter.

The device includes a capacitor based SAR A/D

converter with inherent sample and hold.

The device accepts a wide analog supply range from

2.7V to 5.25V. Very low power consumption makes

this device suitable for battery-powered and isolated

power supply applications.

A wide 1.7V to 5.25V I/O supply range facilitates a

glue-less interface with the most commonly used

CMOS digital hosts.

The serial interface is controlled by CS and SCLK for

easy connection with microprocessors and DSP.

The input signal is sampled with the falling edge of

CS. It uses SCLK for conversion, serial data output,

and reading serial data in. The device allows auto

sequencing of preselected channels or manual selection of a channel for the next conversion cycle.

There are two software selectable input ranges (0V -

2.5V and 0V - 5V), four individually configurable

GPIOs, and two programmable alarm thresholds per

channel. These features make the device suitable for

most data acquisition applications.

The device offers an attractive power-down feature.

This is extremely useful for power saving when the

device is operated at lower conversion speeds.