ADI AD7655ASTZ

The AD7655 is a low cost, simultaneous sampling, dual-channel, 16-bit, charge redistribution SAR, analog-to-digital converter that operates from a single 5 V power supply. It contains two low noise, wide bandwidth, track-and-hold amplifiers that allow simultaneous sampling, a high speed 16-bit sampling ADC, an internal conversion clock, error correction circuits, and both serial and parallel system interface ports. Each track-and-hold has a multiplexer in front to provide a 4-channel input ADC. The A0 multiplexer control input allows the choice of simultaneously sampling input pairs INA1/INB1 (A0 = low) or INA2/INB2 (A0 = high). The part features a very high sampling rate mode (normal) and, for low power applications, a reduced power mode (impulse) where the power is scaled with the throughput. Operation is specified from -40°C to +85°C.

• 4-channel, 16-bit resolution ADC
• 2 track-and-hold amplifiers
• Throughput 500 kSPS (normal mode) 444 kSPS (impulse mode)
• Analog input voltage range: 0 V to 5 V
• No pipeline delay
• Parallel and serial 5 V/3 V interface
• SPI/QSPI/MICROWIRE/DSP compatible
• Single 5 V supply operation
• Power dissipation 120 mW typical 2.6 mW at 10 kSPS
• Package 48-lead quad flat package (LQFP) 48-lead frame chip scale package (LFCSP)
• Pin-to-pin compatible with the AD7654
• Low cost

• AC motor control
• 3-phase power control
• 4-channel data acquisition
• Uninterrupted power supplies
• Communications