THS5661AIDW

Digital To Analog Converters Overview

The THS5661AIDW is a 12-bit digital-to-analog converter (DAC) from the CommsDAC family, optimized for wired and wireless communication systems. It features a 125 MSPS update rate at DVDD of 4.5 V to 5.5 V, with a settling time of 35 ns to 0.1%. The device operates on analog and digital supplies ranging from 3 V to 5.5 V, consuming 175 mW at full scale. It provides differential scalable current outputs adjustable from 2 mA to 20 mA via an internal 1.2 V reference or external input. Integral nonlinearity is ±0.75 LSB, and differential nonlinearity is ±0.5 LSB. The component is housed in a 28-pin SOIC package.

Digital To Analog Converters Feature Summary

• High-speed parallel interface supporting straight binary and two's complement data formats with 1 ns setup/hold times.
• Differential current output architecture providing high output impedance (>300 kΩ) for direct driving of loads without buffers.
• Integrated 1.2 V temperature-compensated bandgap reference with programmable full-scale current control range.
• Asynchronous sleep mode capability reducing standby power consumption significantly.

Digital To Analog Converters Applications

• Digital data transmission in wired communication systems
• Wireless communication system transmitters
• Space-Time Advanced Radio (VT-STAR) transmitter chains

Digital To Analog Converters Procurement Notes

Verify the specific suffix 'DW' corresponds to the 28-pin SOIC package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure supply voltage requirements match the 3 V to 5.5 V operational range specified in the datasheet for both analog and digital domains.

Digital To Analog Converters Selection Notes

Select this component for applications requiring 12-bit resolution at high update rates up to 125 MSPS. Consider the differential current output topology if noise cancellation and increased signal power are required. Verify that the 28-SOIC package fits the board layout constraints and that the 3 V to 5.5 V supply rails are available for both analog and digital sections.

Digital To Analog Converters Part Context

The THS5661AIDW belongs to the Texas Instruments CommsDAC product family, which includes pin-compatible 8-bit, 10-bit, and 14-bit variants. This family shares identical interface options, package outlines, and pinouts to facilitate design scalability across different resolution requirements within communication hardware architectures.

Digital To Analog Converters Replacement Considerations

Pin-compatible alternatives within the same family include the THS5641A (8-bit), THS5651A (10-bit), and THS5664A (14-bit). These devices maintain the same package and interface but offer different resolution and performance characteristics.

Digital To Analog Converters FAQ

How is the full-scale output current adjusted?

The full-scale output current is set using an external bias resistor (RBIAS) combined with the on-chip 1.2 V reference, allowing adjustment from 20 mA down to 2 mA.

What input data formats are supported?

The device supports both straight binary and two's complement input word formats, selectable via the MODE pin configuration.

Does the device require an external output buffer?

No, the high output impedance (>300 kΩ) allows the current outputs to be fed directly to loads such as external resistors or transformers without additional buffering.