DESCRIPTION

The AM6012 12-bit multiplying Digital-to-Analog converter provides high-speed and 0.025 differential nonlinearity over its full commercial temperature range.

The D/A converter uses a 3-bit segment generator for the MSBs in conjunction with a 9-bit R-2R diffused resistor ladder to provide 12-bit resolution without costly trimming processes. This technique guarantees a very uniform step size (up to ± LSB from the ideal), monotonicity to 12 bits and integral nonlinearity to 0.05 at its differential current outputs.

The dual complementary outputs of the AM6012 increase its versatility, and effectively double the peak-to-peak output swing. Digital inputs, in addition, can be configured to accept all popular logic families.

While the device requires a reference input of 1mA for a 4mA full-scale current, operation is nearly independent of power supply voltage shifts. The power supply rejection ratio is ±0.001 FS/ ∆V. The devices will work from +5, -12V to ±18V rails, with as low as 230mW power consumption typical.

FEATURES

• 12-bit resolution

• Accurate to within ±0.05

• Monotonic over temperature

• Fast settling time, 250ns typical

• Trimless design for low cost

• Differential current outputs

• High-speed multiplying capability

• Full-scale current, 4mA (with 1mA reference)

• High output compliance voltage, -5 to +10V

• Low power consumption, 230mW

APPLICATIONS

• CRT displays, computer graphics

• Robotics and machine tools

• Automatic test equipment

• Programmable power supplies

• CAD/CAM systems

• Data acquisition and control systems

• Analog-to-digital converter systems