LTC2632ACTS8-HZ12

Overview

The LTC2632ACTS8-HZ12 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 precision reference with a full-scale output of 4.096V and a temperature coefficient of 10ppm/°C. The device operates on a single supply voltage ranging from 4.5V to 5.5V. 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) error of ±1.5LSB, a settling time of 4.9µs at 5V, and rail-to-rail output buffers. The part is guaranteed monotonic and includes a power-on reset function that clears outputs to zero-scale.

Feature Summary

• Dual 12-bit DACs with integrated 4.096V precision reference (10ppm/°C drift)
• Maximum INL error of ±1.5LSB with guaranteed monotonicity
• Power-on reset to zero-scale for consistent system initialization
• 3-wire SPI/MICROWIRE serial interface supporting clock rates up to 50MHz

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRMPBF or #TRPBF against current distributor availability, as tape and reel quantities vary. Confirm the automotive temperature grade (H-grade: –40°C to 125°C) matches the application requirements. Ensure the 4.5V minimum supply voltage constraint is met by the system power rails before procurement.

Selection Notes

Select this part when a dual-channel DAC with high accuracy (±1.5LSB INL) and low drift is required in a compact TSOT-23 package. The H-series designation mandates a supply voltage between 4.5V and 5.5V due to the 4.096V internal reference. Choose the Z-suffix if zero-scale power-on reset is necessary to prevent transient glitches in downstream circuits during startup.

Part Context

This component belongs to the LTC2632 family, which offers various combinations of resolution (8-, 10-, 12-bit), full-scale voltages (2.5V or 4.096V), and power-on reset behaviors. The ACTS8-HZ12 specifically denotes the Automotive grade (H), Zero-scale reset (Z), 12-bit resolution (12), and TSOT-23 package (TS8). Other variants like the LTC2632-L series operate at lower supply voltages with a 2.5V reference.

Replacement Considerations

Direct pin-compatible replacements within the same family include the LTC2632ACTS8-HI12 (Mid-Scale reset) or LTC2632ACTS8-LZ12 (2.5V Full-Scale, 2.7V–5.5V supply). Verify that the alternative part's supply voltage range and reset behavior align with the existing circuit design.