AD7654

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

IN¹, TEMP¹, REF, REFBUFIN, AVDD + 0.3 V to
INGND, REFGND to AGND AGND 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
PDREF, PDBUF±20 mA
Internal Power Dissipation² 700 mW
Internal Power Dissipation³ 2.5 W
Junction Temperature 150°C
Storage Temperature Range 65°C to +150°C
Lead Temperature Range 300°C

1 See Analog Input section.
2Specification is for the device in free air:48-Lead LQFP; _JA = 91°C/W, _JC = 30°C/W
3 Specification is for the device in free air:48-Lead LFCSP; _JA = 26°C/W.

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. AD7654 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 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. Operation is specified from −40°C to +85°C.