Texas Instruments DAC7760EMC-EVM

Overview

DAC7760EMC-EVM from Texas Instruments is an evaluation module designed to demonstrate the DAC7760 - a 12-bit, single-channel, programmable current/voltage-output digital-to-analog converter - in harsh industrial environments. It supports configurable analog outputs (0–20 mA, 4–20 mA, 4–24 mA current; 0–5 V, 0–10 V, ±5 V, ±10 V voltage), features HART interface compatibility, slew-rate control, watchdog timer, and integrated fault output. The EVM enables rapid validation of DAC7760 performance under EMC/EMI stress per IEC61000-4 test standards.

For engineers reviewing the DAC7760EMC-EVM datasheet, DAC7760EMC-EVM pinout, DAC7760EMC-EVM application, or DAC7760EMC-EVM equivalent, this page provides verified hardware setup details, SPI communication configuration, dual-output enable behavior, over-range voltage extension capability, and calibration register access - all validated against TI's SBAU229 user's guide and SBAS528 datasheet.

Technical Context

The DAC7760EMC-EVM interfaces directly with the SM-USB-DIG platform via a 10-pin SPI-based connector (J1), supporting MOSI, MISO, SCLK, and CS signals at up to 25 Mbps. It hosts the DAC7760IRHA in a 40-pin RHA (QFN) package with internal reference and programmable gain/offset calibration registers.

Hardware-level protection includes TVS diodes (D1–D5) for AVDD/AVSS/DVDD rails, ferrite beads (FB1/FB2), and isolation via ISO7641FCDW digital isolator. Jumper JP1 enables AVSS-to-GND connection for unipolar operation; JP3/JP9 configure DVDD sourcing (internal regulator vs. external supply).

Key Specifications

Availability

DAC7760EMC-EVM is available at Aetrix Electronics and suitable for industrial process control, 4–20 mA loop-powered transmitters, HART-enabled field instrumentation, and precision analog output validation requiring stable component supply and full EMC/EMI test readiness.

Supply support for DAC7760EMC-EVM includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and high-reliability ICs for industrial, automotive, and communications applications.

The DAC7760EMC-EVM belongs to TI's precision DAC evaluation platform family, engineered specifically to validate robustness of the DAC7760 in electrically noisy industrial settings - including surge, fast transient, and radiated immunity stress conditions.

FAQ

What is the DAC7760EMC-EVM used for?

The DAC7760EMC-EVM is an evaluation module built around the DAC7760IRHA to accelerate development of industrial 4–20 mA current-loop transmitters and precision voltage-output systems. It enables functional verification of DAC7760 features - including HART signal injection, slew-rate programming, gain/offset calibration, and fault reporting - under real-world EMC stress per IEC61000-4 standards. Engineers use DAC7760EMC-EVM to de-risk analog output design before final PCB layout.

Does the DAC7760EMC-EVM support both current and voltage outputs simultaneously?

Yes - the DAC7760EMC-EVM supports dual simultaneous outputs when configured with the DAC7760IRHA. Using the EVM software's "Dual Output Enable" function, users can activate both IOUT and VOUT channels concurrently, each independently set to their respective ranges (e.g., 4–20 mA current + 0–10 V voltage). This capability is confirmed in Section 5.2.5 of the SBAU229 user's guide and applies only to DAC7760 devices, not DAC7750 variants.

How is the DAC7760EMC-EVM powered?

The DAC7760EMC-EVM receives DVDD power either from the SM-USB-DIG platform (via JP9 installed) or from the DAC7760's internal regulator (JP3 removed, JP9 open). AVDD and AVSS are supplied externally through terminal block J2; AVSS may be shorted to GND using JP1 for unipolar voltage output modes. All supply rails include TVS diode protection (D1–D5) aligned with DAC7760 absolute maximum ratings.

Can the DAC7760EMC-EVM be used for HART communication testing?

Yes - the DAC7760EMC-EVM is explicitly designed to support HART protocol integration. The DAC7760IRHA onboard features a dedicated HART signal interface, and the EVM's analog front-end includes protection circuitry validated per TIPD153 for isolated, EMC-tested HART-capable transmitters. The EVM software allows direct register-level control of HART-related functions, enabling end-to-end physical-layer validation of DAC7760EMC-EVM in HART-enabled field devices.

What isolation components are used on the DAC7760EMC-EVM?

The DAC7760EMC-EVM uses the ISO7641FCDW - a quad-channel, 25 Mbps digital isolator - to separate the SPI-controlled digital domain (SM-USB-DIG side) from the analog output stage. This isolator ensures galvanic separation between host PC commands and industrial-grade analog outputs, meeting reinforced insulation requirements for safety-critical 4–20 mA loop applications. No optocouplers or transformer-based isolation are used; the ISO7641FCDW is the sole isolation component per the BOM in Section 6.2 of SBAU229.