Analog Devices Inc. AD7264 Simultaneous Sampling SAR ADCs

Analog Devices AD7264 Simultaneous Sampling SAR ADCs are dual, 14-bit, high speed, low power, successive approximation ADCs. The AD7264 operates from a single 5V power supply and features throughput rates of up to 1MSPS per on-chip ADC. Two complete ADC functions allow simultaneous sampling and conversion of two channels. Each ADC is preceded by a true differential analog input with a PGA. There are 14 gain settings available: ×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16, ×24, ×32, ×48, ×64, ×96, and ×128.

The AD7264 contains four comparators. Comparator A and Comparator B are optimized for low power, whereas Comparator C and Comparator D have fast propagation delays. The AD7264 features a calibration function to remove any device offset error and programmable gain adjust registers to allow input path (for example, sensor) offset and gain compensation. The AD7264 has an on-chip 2.5V reference that can be disabled if an external reference is preferred. The AD7264 is available in 48-lead LFCSP and LQFP packages.

Features

Dual, simultaneous sampling, 14-bit, 2-channel ADC
True differential analog inputs
×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16, ×24, ×32, ×48, ×64, ×96, ×128 programmable gain stage
Throughput rate per ADC
- 1MSPS for AD7264
>1GΩ analog input impedance
Wide input bandwidth
- -3dB bandwidth: 1.7MHz at gain = 2