LTC2636CMS-HZ8#PBF

Overview

The LTC2636CMS-HZ8#PBF is an octal, 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a 16-lead MSOP package and operates within a supply voltage range of 4.5V to 5.5V. The device includes an integrated internal reference providing a full-scale output of 4.096V. It utilizes a 3-wire SPI/Microwire-compatible serial interface with clock rates up to 50MHz. Key electrical specifications include a settling time of 3.8µs at ±1 LSB for 8-bit resolution, a maximum integral nonlinearity (INL) error of ±0.05 LSB, and a power-on reset function that initializes outputs to zero-scale.

Feature Summary

• Octal architecture with 8 independent 8-bit DAC channels in a single 16-lead MSOP package
• Integrated 4.096V full-scale internal reference with ±10ppm/°C temperature coefficient
• Power-on reset circuitry configured to initialize all DAC outputs to zero-scale
• Rail-to-rail output buffers with ultralow crosstalk between channels (<2.4nV•s)

Applications

• Mobile communications systems requiring multi-channel signal generation
• Process control and industrial automation instrumentation
• Automatic test equipment (ATE) for precise voltage sourcing
• Portable battery-powered equipment due to low power consumption

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free construction and tube packaging. Confirm the 'MS' package designation corresponds to the 16-lead MSOP form factor required for the design. Ensure the 'HZ8' suffix matches the 4.096V internal reference, zero-scale reset, and 8-bit resolution requirements. Cross-reference the C-grade temperature rating against system environmental constraints.

Selection Notes

Select this component when eight isolated voltage outputs are needed in a compact footprint. The H-grade variant requires a minimum supply voltage of 4.5V, distinguishing it from L-grade parts that operate down to 2.7V. The zero-scale power-on reset is critical for applications where downstream circuits must remain inactive during initialization. Verify that the 50MHz SPI clock speed meets the system data throughput requirements.

Part Context

This part belongs to the LTC2636 family of octal DACs, which offers variations in resolution (8-, 10-, or 12-bit), package type (DFN or MSOP), and power-on reset behavior. The CMS-HZ8 configuration specifically targets high-density designs requiring multiple precision voltage references without external components. It serves as a direct replacement for older octal DAC solutions in space-constrained industrial and automotive boards.

Replacement Considerations

Direct pin-compatible alternatives within the same family include the LTC2636CMS-LZ8#PBF, which shares the same package and reset behavior but operates on a lower supply voltage range (2.7V–5.5V) with a 2.5V internal reference. For higher resolution needs, the LTC2636CMS-HZ12#PBF provides 12-bit accuracy in the identical package.