LTC2642AIDD-16#PBF

Overview

The LTC2642AIDD-16#PBF is a 16-bit bipolar voltage output digital-to-analog converter (DAC) from Analog Devices. It operates on a single 2.7V to 5.5V supply with a typical supply current of 120µA. The device features an unbuffered voltage output that swings from 0V to VREF and includes matched internal scaling resistors for bipolar operation with an external op amp, generating a ±VREF swing at the feedback pin. It utilizes a 3-wire SPI/Microwire compatible serial interface with clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity (INL) of ±1LSB over temperature, a settling time of 1µs to ±0.5LSB, and a glitch impulse of 0.5nV·sec. The component is housed in a 10-lead 3mm × 3mm DFN package.

Feature Summary

• 16-bit resolution with guaranteed monotonicity and ±1LSB INL over temperature
• Low power consumption of 120µA with unbuffered voltage output
• Integrated matched scaling resistors for bipolar output configuration
• Fast 1µs settling time and low 0.5nV·sec glitch impulse

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring high precision
• Data acquisition systems with bipolar signal requirements

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free finish and tube packaging as per the manufacturer's order information table. Confirm the 'I' grade designation corresponds to the -40°C to +85°C industrial operating temperature range. Ensure the DFN package type matches the required PCB footprint for the 10-lead variant.

Selection Notes

Select this model for applications requiring bipolar output capability without external resistor networks, utilizing the internal RFB and INV pins. The A-grade specification ensures tighter linearity limits compared to standard grades. Consider the unbuffered output impedance when designing load circuits to maintain specified gain error and linearity performance.

Part Context

This part belongs to the LTC2642 family of 16-/14-/12-bit DACs. The 'A' suffix denotes enhanced accuracy specifications, specifically ±1LSB INL and DNL over temperature. The 'IDD' indicates the industrial temperature range (-40°C to +85°C) and the 10-lead DFN package. The '#PBF' suffix confirms RoHS compliance and lead-free termination.

Replacement Considerations

The LTC2642CDD-16#PBF offers similar functionality but with commercial temperature range (0°C to 70°C). The LTC2642AIMS-16#PBF provides the same electrical performance in a 10-lead MSOP package instead of DFN.