LTC2636IDE-LMI8#TRPBF

Overview

The LTC2636IDE-LMI8#TRPBF is an octal, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a high-accuracy internal reference with a temperature coefficient of 10ppm/°C and a full-scale output of 2.5V. The device operates on a single supply ranging from 2.7V to 5.5V and utilizes a 3-wire SPI/Microwire-compatible serial interface with clock rates up to 50MHz. It incorporates double-buffered data latches, power-on reset to mid-scale, and rail-to-rail output buffers guaranteed monotonic over the industrial temperature range of –40°C to 85°C.

Feature Summary

• Octal architecture with 8 independent 8-bit DAC channels in a 14-lead DFN package
• Integrated 2.5V full-scale reference with ±10ppm/°C drift
• SPI/Microwire compatible 3-wire serial interface supporting 50MHz clock speeds
• Power-on reset circuitry defaults outputs to mid-scale (1.25V)
• Ultralow crosstalk between DACs (<2.4nV•s) and glitch impulse of 2.1nV•s

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive electronics
• Optical networking devices

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates tape and reel packaging containing 2500 pieces. Confirm the 'I' grade designation matches the required –40°C to 85°C operating temperature range for the target application environment. Ensure the DE package type corresponds to the 14-lead DFN footprint requirements.

Selection Notes

Select this part when eight low-cost, 8-bit channels are required with a fixed 2.5V internal reference. The 'MI' suffix ensures power-on reset to mid-scale, which is critical if downstream circuits must not see zero-voltage during initialization. For applications requiring external reference control or different reset states, consider the LMX or LZ variants within the same family.

Part Context

This component belongs to the LTC2636 family of octal DACs, which offers combinations of 12-, 10-, and 8-bit resolutions with varying full-scale voltages (2.5V or 4.096V). The IDE-LMI8 variant specifically targets industrial environments requiring moderate precision (±0.5 LSB INL) and fast settling times (3.4µs typical) while maintaining low power consumption of approximately 0.9mA at 3V.

Replacement Considerations

Direct pin-compatible replacements within the same package include other LTC2636 variants such as LTC2636IMS-LMI8#PBF (tube packaging) or higher resolution versions like LTC2636IMS-LMI10#PBF and LTC2636IMS-LMI12#PBF, provided the system can accommodate the respective resolution differences.