LTC2637CMS-LMX10#PBF

Overview

The LTC2637CMS-LMX10#PBF is an octal 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features a 16-lead MSOP package and operates on a single 2.7V to 5.5V supply. The device incorporates a power-on reset circuit configured to set outputs to mid-scale when using an external reference. It communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical characteristics include a maximum integral nonlinearity error of ±1 LSB, a settling time of 4.1µs at 3V, and ultralow DAC-to-DAC crosstalk below 3nV•s.

Feature Summary

• Octal 10-bit resolution with rail-to-rail buffered voltage outputs
• Power-on reset to mid-scale in external reference mode
• Ultralow crosstalk between channels (<3nV•s)
• Guaranteed monotonic operation over the full operating temperature range

Applications

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

Procurement Notes

Verify that the specific ordering suffix LMX10 corresponds to the 10-bit resolution, MSOP package, and mid-scale reset configuration for external reference applications. Confirm the temperature grade 'C' meets the required operational environment limits before procurement.

Selection Notes

Select this component when eight independent 10-bit voltage outputs are required within a compact footprint. Ensure the system utilizes an external reference voltage, as the internal reference is bypassed in the LMX configuration. Verify that the I2C bus speed requirements align with the device's support for standard and fast modes.

Part Context

This part belongs to the LTC2637 family of octal DACs, which also includes 8-bit and 12-bit variants. The family shares common architectural features such as low noise and high accuracy but differs in resolution and power-on reset behavior based on the specific ordering suffixes.

Replacement Considerations

Direct substitutes within the same family include LTC2637CMS-LMI10#PBF (mid-scale reset for internal reference) and LTC2637CMS-LZ10#PBF (zero-scale reset). Cross-resolution equivalents like LTC2637CMS-LMX8#PBF or LTC2637CMS-LMX12#PBF offer compatible pinouts with different bit depths.

FAQ

What is the default output state upon power-up for the LTC2637CMS-LMX10#PBF?

The device is configured to reset all DAC outputs to mid-scale when operating in external reference mode.

Does the LTC2637CMS-LMX10#PBF support differential signaling?

No, the LTC2637 provides single-ended voltage outputs; it does not support differential output configurations.

What is the maximum clock frequency supported by the I2C interface?

The device supports both standard mode (100kHz) and fast mode (400kHz) clock rates.