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GENERAL DESCRIPTION

The AD7264 is a dual, 14-bit, high speed, low power, successive approximation ADC that operates from a single 5 V power supply and features throughput rates of up to 1 MSPS per on-chip ADC (500 kSPS for the AD7264-5). 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.

FEATURES

Dual, simultaneous sampling, 14-bit, 2-channel ADC

True differential analog inputs

Programmable gain stage: ×1, ×2, ×3, ×4, ×6, ×8, ×12, ×16,

×24, ×32, ×48, ×64, ×96, ×128

Throughput rate per ADC

1 MSPS for AD7264

500 kSPS for AD7264-5

Analog input impedance: >1 GΩ

Wide input bandwidth

?3 dB bandwidth: 1.7 MHz at gain = 2

4 on-chip comparators

SNR: 78 dB typical at gain = 2, 71 dB typical at gain = 32

Device offset calibration

System gain calibration

On-chip reference: 2.5 V

?40°C to +105°C operation

High speed serial interface

Compatible with SPI, QSPI?, MICROWIRE?, and DSP

48-lead LFCSP and LQFP packages