描述 Description

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. These devices are available in 4 × 4 QFN and TSSOP-16 packages, and are fully specified for operation over the industrial -40°C to +85°C temperature range.

特性 Features

? 2.7V to 5.5V Analog Supply, Low Power:
? 1MHz Sampling Rate 3V ≤ +VA ≤ 5.5V,900kHz Sampling Rate 2.7V ≤ +VA ≤ 3V
? ±0.15LSB Typ, ±0.5LSB Max INL
? ±0.8mV Max Offset Error at 3V
? Excellent AC Performance at fi = 10kHz with 73.9dB SNR, 93.4dB SFDR, -88.5dB THD
? 1.65V to 5.5V I/O Supply:
? SCLK up to 50MHz
? Comprehensive Power-Down Modes:
? Nap Power-Down
? Unipolar Input Range: 0V to VREF
? Global CONVST (Independent of CS)
? 4 × 4 QFN-16 and TSSOP-16 Packages
? Programmable TAG Bit Output
? APPLICATIONS
? Transducer Interface
? Magnetometers
? Data Acquisition Systems
? Automatic Test Equipment

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