LTC2634IMSE-HZ12#PBF

Overview

The LTC2634IMSE-HZ12#PBF is a quad 12-bit voltage output DAC with an integrated precision reference, housed in a 10-lead MSOP package. It features a full-scale output of 4.096V and operates from a 4.5V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the -40°C to 125°C temperature range, and a maximum integral nonlinearity error of ±2.5 LSB. It communicates via a 50MHz SPI/MICROWIRE compatible interface and incorporates a power-on reset circuit that clears outputs to zero-scale upon initialization.

Feature Summary

• Quad 12-bit resolution with ±2.5 LSB maximum INL error
• Integrated 4.096V full-scale reference with 10ppm/°C drift
• Power-on reset to zero-scale for consistent system initialization
• Ultralow crosstalk between DACs (2.4nV•s typical)

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment

Procurement Notes

Verify the specific suffix #PBF indicates lead-free construction and confirm the MSE package designation matches the required 10-lead plastic MSOP form factor. Ensure the H-grade automotive qualification aligns with the intended operating temperature range of -40°C to 125°C. Cross-reference the ordering code against official Analog Devices documentation to confirm availability and manufacturing origin.

Selection Notes

Select this part when a quad DAC configuration with high accuracy and low noise is required in a compact surface-mount package. The H-grade variant supports higher supply voltages (4.5V–5.5V) compared to the L-grade. Consider the zero-scale power-on reset feature if downstream circuits are sensitive to nonzero outputs during startup. Verify that the 50MHz serial clock speed meets the system data throughput requirements.

Part Context

This component belongs to the LTC2634 family of quad DACs, which offers variations in resolution (8, 10, or 12 bits), full-scale voltage (2.5V or 4.096V), and power-on reset behavior. The IMSE-HZ12#PBF specifically denotes the industrial/automotive grade (I/H temp range), MSOP package, 12-bit resolution, and zero-scale reset option. Other variants include mid-scale reset options and external reference modes.

Replacement Considerations

Direct pin-compatible replacements within the same family include other LTC2634 variants with different resolutions or reset behaviors, provided the electrical specifications meet the application needs. For example, LTC2634IMSE-HMI12#PBF offers mid-scale reset instead of zero-scale. External substitutes require careful evaluation of pinout compatibility, supply voltage ranges, and serial interface timing.