LTC2629IGN#PBF

Overview

The LTC2629IGN#PBF is a quad 12-bit rail-to-rail voltage output digital-to-analog converter (DAC) in a 16-lead SSOP package. It operates on a single supply voltage ranging from 2.7V to 5.5V and features built-in high-performance output buffers. The device utilizes a 2-wire I²C compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a settling time of 7µs, differential nonlinearity of ±0.5 LSB, and integral nonlinearity of ±1 LSB. It draws 1.25mA at 5V and supports individual channel power-down to 1µA.

Feature Summary

• Quad 12-bit resolution with rail-to-rail voltage outputs
• I²C interface with 27 selectable addresses via CA0/CA1/CA2 pins
• Power-on reset to zero-scale for consistent initialization
• Ultralow crosstalk between DACs (5µV typical)

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment and instrumentation

Procurement Notes

Verify the suffix #PBF indicates lead-free finish and RoHS compliance. Confirm the IGN suffix corresponds to the industrial temperature range of -40°C to +85°C. Ensure the SSOP-16 package matches the target PCB footprint requirements.

Selection Notes

Select this component when four independent 12-bit channels are required in a compact form factor. Choose the IGN variant over the CGN variant if operation below 0°C is necessary. Consider the LTC2629-1 variant if mid-scale power-on reset behavior is preferred over zero-scale.

Part Context

This part belongs to the LTC2609/LTC2619/LTC2629 family of pin-compatible quad DACs. While maintaining identical pinouts and interfaces, the family differentiates by resolution: LTC2609 offers 16 bits, LTC2619 offers 14 bits, and the LTC2629 provides 12 bits. This allows for design flexibility without changing board layout.

Replacement Considerations

The LTC2629CGN#PBF serves as a commercial grade replacement within the same package and specification profile, differing only in the operating temperature range (0°C to 70°C).

FAQ

What is the default output state upon power-up?

The LTC2629 incorporates a power-on reset circuit that sets the voltage outputs to zero-scale until a valid write and update command are executed.

How many I²C addresses can be configured?

There are 27 selectable slave addresses determined by the logic states (High, Low, or Floating) of the CA0, CA1, and CA2 pins.

What is the maximum output drive capability?

The device guarantees a high rail-to-rail output drive of ±15mA minimum when VCC is 5V.