**LTC2640ITS8-LZ12#TRMPBF: A 12-Bit Quad Voltage Output DAC with Internal Reference**

In the realm of precision analog signal generation, the **LTC2640ITS8-LZ12#TRMPBF** stands out as a highly integrated and versatile solution. This device is a **12-bit, quad-channel voltage-output digital-to-analog converter (DAC)** that incorporates a **precision internal reference**, significantly simplifying system design and enhancing overall performance. Engineered by Analog Devices, this DAC is designed for applications demanding high accuracy, stability, and minimal external component count.

A key feature of this IC is its integrated **2.5V internal reference**, which offers a typical accuracy of ±5mV. This eliminates the need for an external reference chip, saving board space, reducing bill-of-materials cost, and minimizing design complexity. The internal reference is buffered and provides excellent temperature stability, which is crucial for maintaining accuracy across varying environmental conditions. For designs requiring an external reference, the LTC2640 family offers the flexibility to override the internal source.

The converter provides four independent DAC channels, each capable of generating a voltage output from 0V to the reference voltage. The **12-bit resolution** ensures fine control over the output signal, providing 4096 possible output levels. This makes it ideal for applications such as industrial process control, automated test equipment, and instrumentation where multiple precise voltage setpoints are required.

Communication with the LTC2640 is achieved through a versatile **3-wire SPI-compatible serial interface**. This interface allows for daisy-chaining multiple devices, facilitating control in systems with numerous DACs while conserving valuable microcontroller pins. The DAC outputs power up to zero-scale or mid-scale, which can be programmed via the serial interface, ensuring a known state at startup and enhancing system safety.

Housed in a compact **TSOT-23-8 package**, the LTC2640ITS8 is optimized for space-constrained applications. Its small footprint, combined with its quad-channel integration, offers an exceptional density of DAC functionality. The part is specified over the full industrial temperature range (-40°C to +85°C), ensuring reliable operation in harsh environments.

**ICGOOODFIND:** The LTC2640ITS8-LZ12#TRMPBF integrates four 12-bit DACs and a precision reference into a tiny package, delivering exceptional value by reducing component count and simplifying design for multi-channel precision voltage generation.

**Keywords:** 12-Bit DAC, Quad Voltage Output, Internal Reference, SPI Interface, TSOT-23 Package.