LTC2632CTS8-LZ12#TRPBF

Overview

The LTC2632CTS8-LZ12#TRPBF is a dual 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in an 8-lead TSOT-23 package. It features an integrated 2.5V full-scale reference with a temperature coefficient of 10ppm/°C. The device operates on a single supply ranging from 2.7V to 5.5V and communicates via a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. Key specifications include a maximum integral nonlinearity (INL) error of ±2.5LSB, rail-to-rail output buffers, and a power-on reset function that clears outputs to zero-scale.

Feature Summary

• Dual 12-bit DACs with integrated 2.5V precision reference
• Power-on reset to zero-scale for consistent initialization
• 3-wire serial interface with SCK frequencies up to 50MHz
• Rail-to-rail output buffers with guaranteed monotonicity

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment

Procurement Notes

Verify the specific ordering suffix #TRPBF corresponds to the 2,500-piece tape and reel packaging configuration as defined in the manufacturer's documentation. Confirm that the LTSJ part marking aligns with the specified electrical grade and temperature range requirements for the target application environment.

Selection Notes

Select this component when a dual-channel solution with integrated low-drift reference is required in a compact TSOT-23 footprint. The zero-scale power-on reset feature is critical for applications where downstream circuits must remain inactive during system startup. Ensure the supply voltage remains within the 2.7V to 5.5V range to maintain specified performance levels.

Part Context

This part belongs to the LTC2632 family, which offers various combinations of resolution (8-, 10-, or 12-bit), full-scale voltage (2.5V or 4.096V), and power-on reset behaviors. The 'L' designation indicates the 2.5V internal reference variant, while 'Z' specifies the zero-scale reset option. The 'A' grade is not present in this specific part number, implying standard linearity specifications.

Replacement Considerations

Direct substitutes within the same family include LTC2632CTS8-LI12#TRPBF (mid-scale reset) or LTC2632CTS8-HZ12#TRPBF (4.096V reference). Cross-family replacements require verification of pin compatibility, interface protocols, and electrical parameter alignment.

FAQ

What is the default output state upon power-up?

The outputs are cleared to zero-scale due to the 'Z' designation in the part number.

Can the internal reference be bypassed?

Yes, the REF pin allows for external reference selection by configuring the serial interface commands.

What is the maximum serial clock frequency?

The device supports SCK frequencies up to 50MHz.