AD7654*

Features:

Dual 16-Bit 2-Channel Simultaneous Sampling ADC
16 Bits 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 @ 100 kHz
THD: 100 dB @ 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
Power Dissipation
  120 mW Typical,
  2.6 mW @ 10 kSPS
Package: 48-Lead Quad Flatpack (LQFP)
           or 48-Lead Frame Chip Scale Package (LFCSP)
Low Cost



Application

AC Motor Control
3-Phase Power Control
4-Channel Data Acquisition
Uninterrupted Power Supplies
Communications



Pinout




Specifications

Analog Input
    INAx², INBx², REFx, INxN, REFGND . . . . . . . . . . . . . . .
    . . . . . . . . . . . . . . . . . . . . . . AGND 0.3 V to AVDD + 0.3 V
Ground Voltage Differences
    AGND, DGND, OGND . . . . . . . . . . . . . . . . . . . .. . . . . ±0.3 V
Supply Voltages
    AVDD, DVDD, OVDD . . . . . . . . . . . . . . . . .. . 0.3 V to +7 V
    AVDD to DVDD, AVDD to OVDD . . . . . . . .. .. . . . . . . . . ±7 V
    DVDD to OVDD . . . . . . . . . . . . . . . . . . .. . . . 0.3 V to +7 V
Digital Inputs . . . . . . . . . . . . . .. .   . . 0.3 V to DVDD + 0.3 V
Internal Power Dissipation3 . . . . . . . . . . . .. . . . . . . . 700 mW
Internal Power Dissipation4 . . . . . . . . . . . . . . .  . . . . . . 2.5 W
Junction Temperature . . . . . . . . . . . . . .. . .. . . .  . . . . . 150°C
Storage Temperature Range . . . . . . . .  . . 65°C to +150°C
Lead Temperature Range
    (Soldering 10 sec) . . . . . . . . . . . . . . . . .. . . . . . . . . . 300°C



Description

The AD7654 is a low cost, 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 part AD7654 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. It is available in 48-lead LQFP or 48-lead LFCSP packages with operation specified from 40°C to +85°C.