TPC112S1-VR Datasheet Summary

General Description

The TPC112S1-VR is a 12-bit digital-to-analog converter (DAC) designed for low-power, high-performance applications. It features a single-channel, buffered voltage-output DAC with rail-to-rail operation and a power-on reset to zero. The device is pin-compatible with other DACs in the series, including the TPC114S1 and TPC116S1, offering flexibility in resolution options.

Features

• Resolution: 12-bit.
• Low Power Consumption: 90 μA typical.
• Differential Nonlinearity: ±1LSB (max).
• Glitch Energy: 2 nV-s.
• Power-on Reset: Resets to zero output.
• Supply Range: 2.7 V to 5.5 V.
• Buffered Rail-to-Rail Output: Ensures wide output voltage range.
• Fast Serial Interface: 30 MHz, 3-wire SPI/QSPI/MICROWIRE-compatible.
• Schmitt-Trigger Inputs: Suitable for direct optocoupler interface.
• SYNC Interrupt Facility: Allows for interrupt-driven data updates.
• Package: Tiny MSOP8.
• Temperature Range: -40°C to +125°C.

Applications

• Gain and Offset Adjustment: Precise control of gain and offset in analog circuits.
• 2-Wire Sensors: Suitable for interfacing with 2-wire sensors.
• Process Control and Servo Loops: Ideal for applications requiring precise voltage control.
• Portable Instrumentation: Low power consumption makes it suitable for battery-powered devices.
• Programmable Voltage and Current Sources: Provides programmable voltage and current sources.
• Programmable Attenuators: Can be used in applications requiring adjustable attenuation.
• Automatic Test Equipment: Suitable for ATE applications requiring high precision.

Pin Configuration

The TPC112S1-VR features an 8-pin MSOP package with the following pin definitions:

• VDD (Pin 1): Power supply input (2.7 V to 5.5 V).
• VREF (Pin 2): Reference voltage input.
• VFB (Pin 3): Feedback connection for the output amplifier.
• VOUT (Pin 4): Analog output voltage from the DAC.
• SYNC (Pin 5): Level-triggered control input (active LOW).
• SCLK (Pin 6): Serial clock input.
• DIN (Pin 7): Serial data input.
• GND (Pin 8): Ground reference point.

Electrical Characteristics

• Supply Voltage (VDD): 2.7 V to 5.5 V.
• Quiescent Current (IDD): 90 μA typical at 5 V.
• Power-down Current: 400 nA at 5 V.
• Output Voltage Range: 0 V to VDD.
• Integral Nonlinearity (INL): ±0.25 LSB (max).
• Differential Nonlinearity (DNL): ±0.05 LSB (max).
• Zero Offset Error: 6.5 mV typical.
• Full-Scale Offset Error: ±30 mV.
• Gain Error: ±0.13% FS.
• Gain Temperature Coefficient: ±2 ppm/°C.

Functional Description

The TPC112S1-VR uses a precision external reference applied through the high-resistance input for rail-to-rail operation and low system power consumption. The device incorporates a power-on reset circuit to ensure that the DAC output powers up to 0 V and remains there until a valid write takes place. The device also includes a power-down feature that reduces current consumption to 400 nA at 5 V and provides software-selectable output loads while in power-down mode.

Serial Interface

The TPC112S1-VR uses a versatile 3-wire serial interface that operates at clock rates up to 30 MHz and is compatible with SPI, QSPI, MICROWIRE, and DSP interface standards. The interface provides three inputs: SCLK, SYNC, and DIN. Data is transferred synchronously and latched into the input register on each falling edge of the serial-clock input (SCLK).

Power-on Reset

The TPC112S1-VR contains a power-on-reset circuit that ensures the DAC output powers up to 0 V and remains there until a valid write sequence is made to the DAC. This feature is useful in applications where it is important to know the state of the DAC output during power-up.

Power-down Modes

The TPC112S1-VR supports four power-down modes, which can be programmed by setting two bits (PD1 and PD0) in the control register. These modes reduce the supply current to 400 nA at 5 V and provide known output impedance values while in power-down mode.

Ordering Information

• Part Number: TPC112S1-VR.
• Package Type: MSOP8.
• Operating Temperature Range: -40°C to +125°C.
• Lead Finish: RoHS compatible and free of halogen substances.
• Moisture Sensitivity Level (MSL): Level 3.
• Transport Media: Tape and Reel, 3,000 units per reel.

Conclusion

The TPC112S1-VR is a versatile, low-power, high-performance DAC suitable for a wide range of applications requiring precise voltage control and low power consumption. Its small package size and extended temperature range make it ideal for space-constrained and rugged environments.