ADS8557IPM集成电路（IC）的模数转换器（ADC）规格书PDF中文资料

ADS8557IPM属于集成电路（IC）的模数转换器（ADC）。由德州仪器制造生产的ADS8557IPM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。

1 Features

1• Family of 16-, 14-, 12-Bit, Pin- and

Software-Compatible ADCs

• Six SAR ADCs Grouped in Three Pairs

• Maximum Data Rate Per Channel with Internal

Conversion Clock and Reference:

ADS8556: 630 kSPS (PAR) or 450 kSPS (SER)

ADS8557: 670 kSPS (PAR) or 470 kSPS (SER)

ADS8558: 730 kSPS (PAR) or 500 kSPS (SER)

• Maximum Data Rate with External Conversion

Clock and Reference:

800 kSPS (PAR) or 530 kSPS (SER)

• Pin-Selectable or Programmable Input Voltage

Ranges: Up to ±12 V

• Excellent Signal-to-Noise Performance:

ADS8556: 91.5 dB, ADS8667: 85 dB,

ADS8668: 73.9 dB

• Programmable and Buffered Internal Reference:

0.5 V to 2.5 V and 0.5 V to 3.0 V

• Comprehensive Power-Down Modes:

– Deep Power-Down (Standby Mode)

– Partial Power-Down

– Auto-Nap Power-Down

• Selectable Parallel or Serial Interface

• Operating Temperature Range: –40°C to 125°C

2 Applications

• Power Quality Measurement

• Protection Relays

• Multi-Axis Motor Control

• Programmable Logic Controllers

• Industrial Data Acquisition

3 Description

The ADS855x contains six low-power, 16-, 14-, or 12-

bit, successive approximation register (SAR) based

analog-to-digital converters (ADCs) with true bipolar

inputs. Each channel contains a sample-and-hold

circuit that allows simultaneous high-speed multichannel

signal acquisition.

The ADS855x supports data rates of up to 730 kSPS

in parallel interface mode or up to 500 kSPS if the

serial interface is used. The bus width of the parallel

interface can be set to eight or 16 bits. In serial

mode, up to three output channels can be activated.

The ADS855x is specified over the full industrial

temperature range of –40°C to 125°C and is available

in an LQFP-64 package.