Overview
The DAC128S085CIMTX, produced by Texas Instruments, is a 12-bit micro-power OCTAL digital-to-analog converter (DAC) designed for general-purpose applications. This device operates from a single supply voltage ranging from 2.7 V to 5.5 V and is known for its low power consumption, with typical power usage of 1.95 mW at 3 V and 4.85 mW at 5 V. The DAC128S085 is available in 16-lead WQFN and TSSOP packages, with the WQFN package being the smallest in its class. It features rail-to-rail output swing and a 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interfaces, operating at clock rates up to 40 MHz across the entire supply voltage range.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Resolution | 12 Bits | - | 12 Bits | - |
| Supply Voltage | 2.7 V | - | 5.5 V | V |
| Power Consumption at 3 V | - | 1.95 mW | - | mW |
| Power Consumption at 5 V | - | 4.85 mW | - | mW |
| Integral Non-Linearity (INL) | - | - | ±8 LSB | LSB |
| Differential Non-Linearity (DNL) | -0.4 LSB | - | 0.75 LSB | LSB |
| Zero Code Error | - | - | 15 mV | mV |
| Full-Scale Error | - | - | -0.75 %FSR | %FSR |
| Settling Time | - | - | 8.5 μs | μs |
| Operating Temperature Range | -40°C | - | 125°C | °C |
Key Features
- Low Power Operation: Consumes 1.95 mW at 3 V and 4.85 mW at 5 V.
- Rail-to-Rail Voltage Output: Output amplifiers provide rail-to-rail output swing.
- Dual Reference Voltages: Two independent reference inputs for channels A-D and E-H.
- High-Speed Serial Interface: Compatible with SPI, QSPI, MICROWIRE, and DSP interfaces, operating at clock rates up to 40 MHz.
- Daisy-Chain Capability: Allows simultaneous updating of multiple DACs using a single serial interface.
- Individual Channel Power-Down Capability: Each DAC channel can be powered down independently.
- Power-on Reset to 0 V: Ensures DAC outputs power up to zero volts until a valid write is received.
- Small Package Options: Available in 16-lead WQFN and TSSOP packages, with the WQFN being the smallest in its class.
Applications
- Battery-Powered Instruments: Ideal for low-power, battery-operated devices.
- Digital Gain and Offset Adjustment: Useful in applications requiring programmable gain and offset.
- Programmable Voltage and Current Sources: Can be used to generate precise voltage or current outputs.
- Programmable Attenuators: Suitable for applications needing adjustable attenuation.
- Voltage Reference for ADCs: Can serve as a reference voltage source for analog-to-digital converters.
- Sensor Supply Voltage: Can be used to supply voltage to sensors.
- Range Detectors: Useful in applications requiring detection of specific voltage ranges.
Q & A
- What is the resolution of the DAC128S085?
The DAC128S085 has a resolution of 12 bits.
- What is the supply voltage range for the DAC128S085?
The DAC128S085 operates from a single supply voltage ranging from 2.7 V to 5.5 V.
- How much power does the DAC128S085 consume at 3 V and 5 V?
The DAC128S085 consumes 1.95 mW at 3 V and 4.85 mW at 5 V.
- What is the maximum clock rate for the serial interface of the DAC128S085?
The serial interface operates at clock rates up to 40 MHz across the entire supply voltage range.
- Does the DAC128S085 support daisy-chain operation?
Yes, the DAC128S085 supports daisy-chain operation, allowing simultaneous updating of multiple DACs using a single serial interface.
- Can each DAC channel be powered down independently?
Yes, each DAC channel can be powered down independently.
- What is the operating temperature range for the DAC128S085?
The DAC128S085 operates over an extended industrial temperature range of −40°C to 125°C.
- What types of packages are available for the DAC128S085?
The DAC128S085 is available in 16-lead WQFN and TSSOP packages.
- Is the DAC128S085 compatible with standard serial interfaces?
Yes, the DAC128S085 is compatible with standard SPI, QSPI, MICROWIRE, and DSP interfaces.
- What is the settling time for the DAC128S085?
The settling time for the DAC128S085 is 8.5 μs maximum.
