MAXREFDES71#: Dual-channel analog input/analog output with transformer drive power

Overview

Advanced manufacturing, custom production and cost pressures continue to drive factories toward higher production speeds and greater flexibility. To meet the requirements of "no compromise" factory environments, the MAXREFDES71# subsystem reference design provides two high-speed, high-precision, 400ksps, 16-bit analog input channels and output channels. All input and output channels support ±10V and ±20mA signals, plus 20% margin, providing flexibility for low- and high-speed systems using voltage or current signals.

The MAXREFDES71# design uses four dual-channel fast-settling, high-voltage op amps (MAX9633); two 16-bit 500ksps ADCs (MAX11166); two low-noise, fast-settling, high-precision, 16-bit DACs (MAX5316); two ultra-high Accurate 4.096V voltage reference (MAX6126); seven high-speed digital isolators (MAX14850); H-bridge transformer driver for isolated supplies (MAX13256); and regulation of +18V, -18V, +5V, and -1.25V power rails device (MAX8719, MAX8881). By using high-precision and high-speed components, the subsystem performs well in both process control applications (such as sensor inputs) and control applications (such as servo drives, resolvers and encoders).

Figure 1. MAXREFDES71 subsystem design block diagram.

characteristic

• Two independent analog inputs

• Two independent analog outputs

• Power and digital signal isolation

• High-speed 400ksps analog input sampling rate

• High-precision 16-bit resolution

• Voltage output settles to within 2 LSB in 17µs

• Current output settles to within 2 LSB in 77µs

• Device driver

• C language source code example

• ZedBoard™ Platform Profile

• Compatible with FMC

Competitive Advantage

• high speed

• High precision

• low noise

application

• Industrial control automation

• Servo drive