AD7874ANZ

AD7874 is a 4-channel simultaneous sampling, 12bit data acquisition system. The part contains a high speed 12bit ADC, on-chip reference, on-chip clock and four track/hold amplifiers. This latter feature allows the 4 input channels to be sampled simultaneously, thus preserving the relative phase information of the 4 input channels, which is not possible if all four channels share a single track/hold amplifier. This makes the AD7874 ideal for applications such as phased-array sonar and AC motor controllers where the relative phase information is important. The aperture delay of the four track/hold amplifiers is small and specified with minimum and maximum limits. This allows several AD7874s to sample multiple input channels simultaneously without incurring phase errors between signals connected to several devices. Typical application includes sonar, motor controllers, adaptive filters and digital signal processing.

• Simultaneous sampling of 4 channels
• Fast 12bit ADC with 8µs conversion time/channel
• 29KHz sample rate for all four channels
• On-chip reference: ±10V input range and ±5V supplies
• 500KHz typ -3dB small signal BW and 70dB min SNR
• THD: -78dB max, ±1LSB max DNL
• ±600µA max input current
• 150mW max power dissipation
• 28 lead PDIP
• Operating temperature range from -40 to 85°C

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