AD7265BSUZ

The AD7265 is a dual, 12-bit, high speed, low power, successive approximation ADC that operates from a single 2.7 V to 5.25 V power supply and features throughput rates of up to 1 MSPS. The device contains two ADCs, each preceded by a 3-channel multiplexer, and a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 30 MHz. The conversion process and data acquisition use standard control inputs allowing easy interfacing to microprocessors or DSPs. The input signal is sampled on the falling edge of CS; conversion is also initiated at this point. The conversion time is determined by the SCLK frequency. The AD7265 uses advanced design techniques to achieve very low power dissipation at high throughput rates. With 5 V supplies and a 1 MSPS throughput rate, the part consumes 4 mA maximum. The part also offers flexible power/throughput rate management when operating in normal mode, because the quiescent current consumption is so low. The analog input range for the part can be selected to be a 0V to V_REF (or 2×V_REF) range, with either straight binary or twos complement output coding. The AD7265 has an on-chip 2.5 V reference that can be overdriven when an external reference is preferred. This external reference range is 100 mV to V_DD. The AD7265 is available in 32-lead LFCSP and 32-lead TQFP.

Key features

• Dual 12-bit, 3-channel ADC
• Throughput rate: 1 MSPS
• Specified for VDD of 2.7 V to 5.25 V
• Power consumption 7 mW at 1 MSPS with 3 V supplies 17 mW at 1 MSPS with 5 V supplies
• Pin-configurable analog inputs 12-channel single-ended inputs 6-channel fully differential inputs 6-channel pseudo differential inputs
• 70 dB SINAD at 50 kHz input frequency
• Accurate on-chip reference: 2.5 V ±0.2% maximum @25°C , 20 ppm/°C maximum
• Dual conversion with read 875 ns, 16 MHz SCLK
• High speed serial interface SPI-/QSPI-/MICROWIRE-/DSP-compatible
• -40°C to +125°C operation
• Shutdown mode: μA maximum
• 32-lead LFCSP and 32-lead TQFP
• 2 MSPS version, AD7266