LTC2634CUD-HZ8#TRPBF

Overview

The LTC2634CUD-HZ8#TRPBF is a quad 8-bit voltage output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 4.096V and operates on a single 4.5V to 5.5V supply. The device utilizes a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Key specifications include a maximum integral nonlinearity (INL) error of ±0.5 LSB, rail-to-rail output buffers, and guaranteed monotonicity over the operating temperature range. This specific variant includes a power-on reset function that clears outputs to zero-scale in internal reference mode.

Feature Summary

• Quad 8-bit DACs with integrated 10ppm/°C precision reference
• 4.096V full-scale output with 4.5V to 5.5V supply requirement
• 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
• Portable equipment

Procurement Notes

Verify the package type matches the design requirements, as this component uses a 16-lead QFN format. Confirm the temperature grade corresponds to the application environment, noting that the 'C' suffix indicates commercial range operation. Ensure the tape and reel quantity aligns with production needs, as this suffix denotes a 2,500-piece packaging configuration.

Selection Notes

Select this part when a low-resolution, high-speed quad DAC is required with a fixed 4.096V output span. The H-grade designation ensures performance within the 4.5V to 5.5V supply window. Consider the zero-scale power-on reset feature if downstream circuitry must remain inactive during startup. Verify that the 3-wire serial interface timing constraints are met by the host microcontroller.

Part Context

This component belongs to the LTC2634 family, which offers various combinations of resolution (8, 10, or 12 bits), full-scale voltages (2.5V or 4.096V), and power-on reset behaviors. The CUD suffix identifies the commercial temperature grade and 16-lead QFN package, while HZ specifies the 4.096V full-scale and zero-scale reset option.

Replacement Considerations

Direct substitutes within the same family include LTC2634CUD-HZ10#TRPBF (10-bit) and LTC2634CUD-HZ12#TRPBF (12-bit). For different reset behaviors, consider LTC2634CUD-HMI8#TRPBF (mid-scale reset). Package variations such as the 10-lead MSOP (MSE) are available but require schematic adjustments.