**LTC2644HMS-L12#PBF: A 12-Bit Quad Voltage Output DAC with Precision Reference**

In the realm of precision analog signal generation, the **LTC2644HMS-L12#PBF** from Analog Devices stands out as a high-performance solution. This device is a **12-bit, quad-channel, voltage-output digital-to-analog converter (DAC)** that integrates a **precision 2.5V reference**, offering a complete and compact solution for systems requiring multiple accurate analog outputs.

The core of the LTC2644HMS-L12#PBF's performance is its integrated **low-drift, 2.5V reference**. This internal reference boasts an initial accuracy of ±5mV (max) and a low temperature drift of just 10ppm/°C, which is critical for maintaining output accuracy over varying environmental conditions. By eliminating the need for an external reference, the IC simplifies board design, reduces overall component count, and saves valuable PCB space.

Each of the four DAC channels features a **rail-to-rail output buffer amplifier**. This allows the output voltage to swing from 0V to the reference voltage (2.5V in this case) with excellent linearity. The DAC itself provides exceptional **12-bit INL and DNL specifications of ±1 LSB (max)**, ensuring a monotonic output and high accuracy across the entire digital code range. The device operates on a single 2.7V to 5.5V supply, making it suitable for both 3.3V and 5V systems.

Communication is handled via a versatile **2-wire I²C-compatible serial interface**, which supports standard, fast, and high-speed modes (up to 400kHz, 1MHz, and 3.4MHz respectively). This allows for rapid updates of the DAC outputs and easy daisy-chaining of multiple devices, minimizing the number of GPIOs required from the controlling microcontroller or processor. The interface also includes a timeout feature to prevent bus lock-up.

A key feature of this DAC family is its **power-on reset (POR) circuit**. Upon startup, the DAC outputs are reset to either zero-scale or mid-scale, which can be selected by the user via a dedicated pin (MODE). This deterministic behavior is essential for ensuring a known, safe state at power-up in control systems, preventing unexpected actuator movements or system states.

The LTC2644HMS-L12#PBF is offered in a compact **10-lead MSOP package**, ideal for space-constrained applications. Its combination of precision, integration, and a small footprint makes it perfectly suited for a wide array of applications, including:

* Process control and automation

* Programmable voltage and current sources

* Automated test equipment (ATE)

* Digital gain and offset adjustment

* Motor control

* Data acquisition systems

**ICGOO**D**FIND**

The LTC2644HMS-L12#PBF is an **exceptional integrated solution** for designers seeking to add multiple high-accuracy analog outputs. Its **integrated precision reference**, **excellent DC performance**, and **compact form factor** deliver outstanding value by reducing design complexity and board space while ensuring reliable and precise operation.

**Keywords:** 12-Bit DAC, Precision Voltage Reference, I²C Interface, Quad Voltage Output, Low Power Consumption