Overview
The DAC121S101CIMK-NS, produced by National Semiconductor (now part of Texas Instruments), is a full-featured, general-purpose 12-bit voltage-output digital-to-analog converter (DAC). This device operates from a single power supply ranging from 2.7V to 5.5V and consumes a low current of 177 µA at 3.6V. It is designed for low power operation and features a rail-to-rail voltage output, making it suitable for a wide range of applications, including battery-powered instruments and automotive systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12 | bits |
| Differential Non-Linearity (DNL) | +0.25, -0.15 | LSB (typ) |
| Output Settling Time | 8 µs (typ) | |
| Zero Code Error | 4 mV (typ) | |
| Full-Scale Error | -0.06 %FS (typ) | |
| Power Consumption (Normal Mode) | 0.64 mW (3.6V) / 1.43 mW (5.5V) (typ) | |
| Power Consumption (Power Down Mode) | 0.14 µW (3.6V) / 0.39 µW (5.5V) (typ) | |
| Operating Temperature Range | -40°C to +105°C (DAC121S101), -40°C to +125°C (DAC121S101-Q1) | |
| Supply Voltage Range | 2.7V to 5.5V | |
| SCLK Frequency | 30 MHz (max) |
Key Features
- Small packages: Available in 6-lead SOT and 8-lead VSSOP packages.
- Power Down Feature: Reduces power consumption significantly in power-down mode.
- Guaranteed Monotonicity: Ensures that the DAC output is always monotonic.
- Low Power Operation: Consumes only 177 µA of current at 3.6V.
- Rail-to-Rail Voltage Output: Allows the output voltage to swing from 0V to the supply voltage.
- Power-on Reset to Zero Volts Output: Ensures the DAC output powers up to zero volts and remains there until a valid write.
- Wide Temperature Range: Operates over -40°C to +105°C (DAC121S101) and -40°C to +125°C (DAC121S101-Q1).
- Wide Power Supply Range: Supports supply voltages from 2.7V to 5.5V.
- Three Wire Serial Interface: Compatible with SPI, QSPI, MICROWIRE, and DSP interfaces.
Applications
- Battery-Powered Instruments: Ideal for low power consumption.
- Automotive Systems: AEC-Q100 Grade 1 qualified for automotive use.
- Programmable Voltage & Current Sources: Can be used in various control and measurement systems.
- Programmable Attenuators: Useful in signal processing and conditioning.
- Digital Gain and Offset Adjustment: Suitable for precision applications requiring adjustable gain and offset.
Q & A
- What is the resolution of the DAC121S101? The resolution is 12 bits.
- What is the typical power consumption of the DAC121S101 at 3.6V? The typical power consumption is 0.64 mW.
- What is the output settling time of the DAC121S101? The output settling time is typically 8 µs.
- What are the operating temperature ranges for the DAC121S101 and DAC121S101-Q1? The DAC121S101 operates from -40°C to +105°C, while the DAC121S101-Q1 operates from -40°C to +125°C.
- What is the supply voltage range for the DAC121S101? The supply voltage range is from 2.7V to 5.5V.
- Is the DAC121S101 compatible with SPI interfaces? Yes, it is compatible with SPI, QSPI, MICROWIRE, and DSP interfaces.
- What is the maximum SCLK frequency for the DAC121S101? The maximum SCLK frequency is 30 MHz.
- Does the DAC121S101 have a power-on reset feature? Yes, it has a power-on reset to zero volts output.
- What are the package options for the DAC121S101? It is available in 6-lead SOT and 8-lead VSSOP packages.
- Is the DAC121S101 suitable for automotive applications? Yes, the DAC121S101-Q1 is AEC-Q100 Grade 1 qualified for automotive use.
