ADS7229IPW

低功耗， 12位， 1MHz的，单/双单极性输入，模拟 - 数字转换器，串行接口 LOW-POWER, 12-BIT, 1MHz, SINGLE/DUAL UNIPOLAR INPUT, ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL INTERFACE

DESCRIPON

The ADS7229 is a low-power, 12-bit, 1MSPS analog-to-digital converter ADC with a unipolar input. The device includes a 12-bit capacitor-based successive approximation register SAR ADC with inherent sample-and-hold.

The ADS7230 is based on the same core and includes a 2-to-1 input MUX with a programmable TAG bit output option. Both the ADS7229 and ADS7230 offer a high-speed, wide voltage serial interface and are capable of daisy-chain mode operation when multiple converters are used.

FEATURES

• 2.7V to 5.5V Analog Supply, Low Power:

   – 13.7mW 1MHz, +VA = 3V, +VBD = 1.8V

• 1MHz Sampling Rate 3V ≤ +VA ≤ 5.5V,

900kHz Sampling Rate 2.7V ≤ +VA ≤ 3V

• Excellent DC Performance:

   – ±0.15LSB Typ, ±0.5LSB Max INL

   – ±0.12LSB Typ, ±0.5LSB Max DNL

   – ±0.8mV Max Offset Error at 3V

   – ±1.25mV Max Offset Error at 5V

• Excellent AC Performance at fI = 10kHz with 73.9dB SNR, 93.4dB SFDR, –88.5dB THD

• Built-In Conversion Clock CCLK

• 1.65V to 5.5V I/O Supply:

   – SPI™/DSP-Compatible Serial Interface

   – SCLK up to 50MHz

• Comprehensive Power-Down Modes:

   – Deep Power-Down

   – Nap Power-Down

   – Auto Nap Power-Down

• Unipolar Input Range: 0V to VREF

• Software Reset

• Global CONVST Independent of CS

• Programmable Status/Polarity EOC/INT

• 4 × 4 QFN-16 and TSSOP-16 Packages

• Multi-Chip Daisy-Chain Mode

• Programmable TAG Bit Output

• Auto/Manual Channel Select Mode ADS7230

APPLICATIONS

• Communications

• Transducer Interface

• Medical Instruments

• Magnetometers

• Industrial Process Control

• Data Acquisition Systems

• Automatic Test Equipment