ADS7280 - Low-Power, 14-Bit, 1-MHz, Single/Dual Unipolar Input, ADCs with Serial Interface

The ADS7279 is a low-power, 14-bit, 1MSPS analog-to-digital converter (ADC) with a unipolar input. The device includes a 14-bit, capacitor-based successive approximation register (SAR) ADC with inherent sample-and-hold.

The ADS7280 is based on the same core and includes a 2-to-1 input MUX with a programmable TAG bit output option. Both the ADS7279 and ADS7280 offer a high-speed, wide voltage serial interface, and are capable of daisy-chain mode operation when multiple converters are used.

These converters 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.

• 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:
  • ±0.4LSB Typ, ±1.0LSB Max INL
  • ±0.4LSB Typ, ±1.0LSB Max DNL
  • ±0.8mV Max Offset Error at 3V
  • ±1.25mV Max Offset Error at 5V
• Excellent AC Performance at f_i = 10kHz with 85.9dB SNR, 105.3dB SFDR, -100.1dB 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 V_REF
• 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 (ADS7280)
• APPLICATIONS
  • Communications
  • Transducer Interface
  • Medical Instruments
  • Magnetometers
  • Industrial Process Control
  • Data Acquisition Systems
  • Automatic Test Equipment