Overview
The LTC2642CDD-12#PBF is a 12-bit unbuffered voltage output Digital-to-Analog Converter (DAC) from Analog Devices Inc. This component is part of the LTC2641/LTC2642 family, which includes 16-, 14-, and 12-bit DACs. The LTC2642 operates from a single supply voltage ranging from 2.7V to 5.5V and is guaranteed to be monotonic over temperature. It features a low supply current of 120µA and a low offset error of ±1LSB, making it suitable for applications requiring high precision and low power consumption.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Resolution | 12 | 12 | 12 | Bits | |
| Monotonicity | 12 | 12 | 12 | Bits | |
| DNL (Differential Nonlinearity) | ±0.5 | ±0.5 | ±0.5 | LSB | |
| INL (Integral Nonlinearity) | ±0.5 | ±0.5 | ±0.5 | LSB | |
| VDD (Supply Voltage) | 2.7 | 5.5 | V | ||
| IDD (Supply Current) | Digital Inputs = 0V or VDD | 120 | 200 | µA | |
| Power Dissipation | Digital Inputs = 0V or VDD, VDD = 5V | 0.60 | mW | ||
| Power Dissipation | Digital Inputs = 0V or VDD, VDD = 3V | 0.36 | mW | ||
| VIL (Digital Input Low Voltage) | VCC = 4.5V to 5.5V | 0.8 | V | ||
| VIL (Digital Input Low Voltage) | VCC = 2.7V to 4.5V | 0.6 | V | ||
| IIN (Digital Input Current) | VIN = GND to VDD | ±1 | µA | ||
| CIN (Digital Input Capacitance) | 3 | 10 | pF |
Key Features
- High Precision: The LTC2642CDD-12#PBF offers 12-bit resolution with ±0.5LSB differential nonlinearity (DNL) and ±0.5LSB integral nonlinearity (INL), ensuring high accuracy and monotonic operation over temperature.
- Low Power Consumption: The DAC operates with a low supply current of 120µA, making it suitable for battery-powered and low-power applications.
- Wide Supply Voltage Range: The component can operate from a single supply voltage ranging from 2.7V to 5.5V.
- Simple SPI/MICROWIRE Interface: The DAC features a 3-wire serial interface compatible with SPI/MICROWIRE, which can operate at clock rates up to 50MHz and can interface directly with optocouplers for isolation.
- Bipolar Operation Capability: The LTC2642 includes matched scaling resistors for bipolar operation using an external precision op-amp, such as the LT1678.
- Power-On Reset and Asynchronous Clear: The DAC has a power-on reset circuit that clears the output to midscale, and an asynchronous clear input that clears the DAC to midscale.
Applications
- Industrial Control Systems: The high precision and reliability of the LTC2642 make it suitable for industrial control systems where accurate voltage output is critical.
- Medical Devices: The low power consumption and high accuracy of the DAC make it ideal for medical devices that require precise voltage control.
- Aerospace and Defense: The component's ability to operate over a wide temperature range and its high reliability make it suitable for aerospace and defense applications.
- Automotive Systems: The LTC2642 can be used in automotive systems that require precise voltage control and low power consumption.
- Test and Measurement Equipment: The high precision and stability of the DAC make it suitable for test and measurement equipment where accurate voltage output is necessary.
Q & A
- What is the resolution of the LTC2642CDD-12#PBF?
The LTC2642CDD-12#PBF has a resolution of 12 bits.
- What is the supply voltage range for the LTC2642?
The LTC2642 operates from a single supply voltage ranging from 2.7V to 5.5V.
- What is the typical supply current of the LTC2642?
The typical supply current of the LTC2642 is 120µA.
- Does the LTC2642 support bipolar operation?
- What type of serial interface does the LTC2642 use?
The LTC2642 uses a simple SPI/MICROWIRE compatible 3-wire serial interface.
- What is the clock rate limit for the serial interface?
The serial interface can operate at clock rates up to 50MHz.
- Does the LTC2642 have a power-on reset feature?
- Can the LTC2642 be used with optocouplers for isolation?
- What is the typical power dissipation of the LTC2642 at VDD = 5V?
The typical power dissipation at VDD = 5V is 0.60mW.
- What is the differential nonlinearity (DNL) of the LTC2642?
The differential nonlinearity (DNL) of the LTC2642 is ±0.5LSB.
