AD7654 IC Chip

AD7654（16-Bit, 500 kSPS PuISAR Dual,2-Channel, Simultaneous Sampling ADC）

Introduction

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 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.

Features

• 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:0V to 5V
• No pipeline delay
• Parallel and serial 5 V/3 V interface
• SPI®/QSPI™/MICROWIR™/DSP compatible
• Single 5 V supply operation
• Power dissipation:
  —120 mW typical
  —2.6 mW at 10 kSPS
• Packages:
  —48-lead low profile quad flat package (LQFP)
  —48-lead lead frame chip scale package (LFCSP)
• Low cost

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