LTC2632AHTS8-LI12

Overview

The LTC2632AHTS8-LI12#TRMPBF is a dual 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in an 8-lead TSOT-23 package. It features an integrated precision reference with a full-scale output of 4.096V and operates on a single supply voltage ranging from 4.5V to 5.5V. The device supports a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±1.5LSB, a settling time of 4.1µs at 5V, and low power consumption of 0.5mA typical at 5V. The part is designed for the automotive temperature range (-40°C to +125°C) and includes a power-on reset function that sets the output to mid-scale.

Feature Summary

• Dual 12-bit DACs with integrated 4.096V precision reference (±10ppm/°C drift)
• Maximum INL error of ±1.5LSB ensuring high accuracy
• Automotive temperature grade (-40°C to +125°C) with rail-to-rail output buffers
• Power-on reset to mid-scale (2.048V) in internal reference mode

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive applications

Procurement Notes

Verify the specific ordering suffix #TRMPBF indicates a 500-piece tape and reel packaging quantity. Confirm the H-grade designation corresponds to the 4.5V to 5.5V supply range and 4.096V full-scale output. Ensure the LI12 code matches the required mid-scale power-on reset behavior for internal reference configurations.

Selection Notes

Select this component when a dual-channel DAC with high linearity (±1.5LSB max INL) and an integrated reference is required. The H-grade variant is necessary for applications needing a 4.096V full-scale output, which mandates a minimum supply voltage of 4.5V. The LI12 configuration provides a safe mid-scale startup state, suitable for systems where downstream circuits must remain active during power-up without receiving zero-scale signals.

Part Context

This part belongs to the LTC2632 family, which offers various combinations of resolution (8-, 10-, or 12-bit), full-scale voltage (2.5V or 4.096V), and power-on reset behaviors. The 'A' prefix denotes the higher accuracy grade with ±1.5LSB INL, while 'H' specifies the 4.096V reference version. The 'TS8' indicates the 8-lead TSOT-23 package, and 'LI12' defines the 12-bit resolution with mid-scale reset in internal reference mode.

Replacement Considerations

Direct substitutes within the same family include LTC2632ACTS8-HZ12#TRMPBF (zero-scale reset) or LTC2632ACTS8-HI12#PBF (tube packaging). For different resolutions, consider LTC2632ACTS8-HI10#TRMPBF (10-bit) or LTC2632ACTS8-HI8#TRMPBF (8-bit), noting changes in DNL/INL specifications.