ANALOG DEVICES AD7865ASZ-3 Analogue to Digital Converter, 14 bit, 350 kSPS, Single Ended, Parallel, Dual (+/-), -2.5 V

AD7865ASZ-3 is a fast, low-power, four-channel simultaneous sampling 14-bit A/D converter that operates from a single 5V supply. The part contains a 2.4µs successive approximation ADC, four-track/hold amplifiers, a 2.5V reference, an on-chip clock oscillator, signal conditioning circuitry, and a high-speed parallel interface. The input signals on four channels are sampled simultaneously thus preserving the relative phase information of the signals on the four analogue inputs. The part allows any subset of the four channels to be converted in order to maximize the throughput rate on the selected sequence. The channels to be converted can be selected either via hardware (channel select input pins) or via software (programming the channel select register). It is used in applications such as AC motor control, uninterruptible power supplies, industrial power meters/monitors, data acquisition systems, and communications.

• Four simultaneously sampled inputs, four track/hold amplifiers
• HW/SW select of channel sequence for conversion, overvoltage protection on analogue inputs
• High speed parallel interface which also allows interfacing to 3V processors
• 3MHz typical -3dB full power bandwidth at (VDD = 5V, ±5%)
• Track/hold acquisition time is 0.35µs maximum at (VDD = 5V, ±5%, AGND = DGND = 0V)
• Signal to (noise + distortion) ratio is 78dB minimum at (VDD = 5V, ±5%, AGND = DGND = 0V)
• Differential nonlinearity is ±1LSB maximum at (VDD = 5V, ±5%, AGND = DGND = 0V)
• Input voltage range is ±2.5V, VREF OUT temperature coefficient is 25 ppm/°C typ at (VDD = 5V)
• Total harmonic distortion is -86dB maximum at (VDD = 5V, ±5%, AGND = DGND = 0V)
• Operating temperature range from -40°C to +85°C, 44-lead plastic quad flatpack package

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party