Product Details
●The AD7654 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 device 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.
●Applications
● AC motor control
● 3-phase power control
● 4-channel data acquisition
● Uninterrupted power supplies
● Communications
●Product Highlights
● 1. Simultaneous Sampling.
●The AD7654 features two sample-and-hold circuits that allow simultaneous sampling. It provides inputs for four channels.
● 2. Fast Throughput.
●The AD7654 is a 500 kSPS, charge redistribution, 16-bit SAR ADC with internal error correction circuitry.
● 3. Superior INL and No Missing Codes.
●The AD7654 has a maximum integral nonlinearity of 3.5 LSB with no missing 16-bit codes.
● 4. Single-Supply Operation.
●The AD7654 operates from a single 5 V supply. In impulse mode, its power dissipation decreases with throughput.
● 5. Serial or Parallel Interface.
●Versatile parallel or 2-wire serial interface arrangement is compatible with both 3 V and 5 V logic.
●### Features and Benefits
● Dual, 16-bit, 2-channel simultaneous sampling ADC
● 16-bit resolution with no missing codes
● Throughput:
●500 kSPS (normal mode)
●444 kSPS (impulse mode)
● INL: ±3.5 LSB max (±0.0053% of full scale)
● SNR: 89 dB typ at 100 kHz
● THD: −100 dB at +100 kHz
● 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
● See data sheet for additional features
