ADS7229数据手册集成电路（IC）的模数转换器（ADC）规格书PDF

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:
• 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

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