MAX1203 - 5V、8通道、串行、12位ADC，3V数字接口

MAX1203是Maxim美信半导体公司的一款数据转换器和采样-保持电路产品，MAX1203是5V、8通道、串行、12位ADC，3V数字接口，本站介绍了MAX1203的封装应用图解、特点和优点、功能等，并给出了与MAX1203相关的Maxim元器件型号供参考。

MAX1203 - 5V、8通道、串行、12位ADC，3V数字接口 - 数据转换器和采样-保持电路 - 可理想用于12位+5V或±5V模拟、+3V数字供电系统 - 美信半导体

产品概述

The MAX1202/MAX1203 are 12-bit data-acquisition systems specifically designed for use in applications with mixed +5V (analog) and +3V (digital) supply voltages. They operate with a single +5V analog supply or dual ±5V analog supplies, and combine an 8-channel multiplexer, high-bandwidth track/hold, and serial interface with high conversion speed and low power consumption.

A 4-wire serial interface connects directly to SPI/MICROWIRE® devices without external logic, and a serial strobe output allows direct connection to TMS320-family digital signal processors. The MAX1202/MAX1203 use either the internal clock or an external serial-interface clock to perform successive approximation analog-to-digital conversions. The serial interface operates at up to 2MHz.

The MAX1202 features an internal 4.096V reference, while the MAX1203 requires an external reference. Both parts have a reference-buffer amplifier that simplifies gain trim. They also have a VL pin that is the power supply for the digital outputs. Output logic levels (3V, 3.3V, or 5V) are determined by the value of the voltage applied to this pin.

These devices provide a hard-wired active-low SHDN pin and two software-selectable power-down modes. Accessing the serial interface automatically powers up the devices. A quick turn-on time enables the MAX1202/MAX1203 to be shut down between conversions, allowing the user to optimize supply currents. By customizing power-down between conversions, supply current can drop below 10µA at reduced sampling rates.

The MAX1202/MAX1203 are available in 20-pin SSOP and PDIP packages, and are specified for the commercial and extended temperature ranges.

关键特性

以下关键特性由Maxim美信半导体提供：

8-Channel Single-Ended or 4-Channel Differential Inputs

Operates from Single +5V or Dual ±5V Supplies

User-Adjustable Output Logic Levels (2.7V to 5.25V)

Low Power:

1.5mA (Operating Mode)

2µA (Power-Down Mode)

Internal Track/Hold, 133kHz Sampling Rate

Internal 4.096V Reference (MAX1202)

SPI/MICROWIRE/TMS320-Compatible 4-Wire Serial Interface

Software-Configurable Unipolar/Bipolar Inputs

20-Pin PDIP/SSOP

热门应用

5V/3V混合供电系统

电池供电应用

数据采集

高精度过程控制

医疗仪器

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