LTC2636IDE-LZ12#PBF

Overview

The LTC2636IDE-LZ12#PBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated 10ppm/°C reference with a full-scale output of 4.096V and operates on a single 4.5V to 5.5V supply. The device provides rail-to-rail outputs, guaranteed monotonicity over the –40°C to 85°C temperature range, and communicates via a 3-wire SPI/MICROWIRE interface. Key specifications include a maximum integral nonlinearity (INL) of ±2.5 LSB, a settling time of 4.4µs at 3V (4.8µs at 5V), and power-on reset to zero-scale.

Feature Summary

• Octal 12-Bit Resolution: Eight independent DAC channels with high precision linearity.
• Integrated Reference: Built-in 10ppm/°C reference yielding a 4.096V full-scale output.
• Power-On Reset: Resets all outputs to zero-scale upon power-up for consistent initialization.
• Low Power Consumption: Draws approximately 1.1mA at 5V with internal reference enabled.

Applications

• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment

Procurement Notes

Verify the package type matches the design requirements; this specific part number corresponds to the 14-lead DFN package. Confirm that the operating environment stays within the industrial temperature range of –40°C to 85°C. Ensure the system supply voltage remains between 4.5V and 5.5V to meet electrical specifications. Check for any required external reference buffering if the REF pin drives significant load current.

Selection Notes

Select this component when eight synchronized 12-bit outputs are required with minimal external reference circuitry. The LZ suffix indicates a zero-scale power-on reset, which is critical for systems where downstream circuits must remain inactive during startup. Compare against the HMI/HMX variants if mid-scale reset is preferred, or the L-series if a lower 2.7V–5.5V supply range and 2.5V full-scale output are sufficient.

Part Context

This part belongs to the LTC2636 family of octal DACs, which also includes 10-bit and 8-bit resolutions. The 'I' designation specifies the industrial temperature grade, while 'Z12' denotes the 12-bit resolution with zero-scale reset behavior. Other package options include the 16-lead MSOP, which adds dedicated CLR and LDAC pins not present in the DFN version.

Replacement Considerations

Direct functional substitutes within the same family include LTC2636IDE-MI12#PBF (mid-scale reset) or LTC2636IDE-HZ12#PBF (automotive grade). For different resolutions, consider LTC2636IDE-LZ10#PBF or LTC2636IDE-LZ8#PBF, noting changes in linearity specs and full-scale voltage ranges.