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.
●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
