DAC7611U/2K5 - 12-Bit Serial DAC, 5V, SOIC-8 | Texas Instruments
MPN: DAC7611U/2K5 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.95 | $6.95 |
| 10 | $6.18 | $61.80 |
| 100 | $5.32 | $532.00 |
| 500 | $4.71 | $2,355.00 |
| 1,000 | $4.2 | $4,200.00 |
DAC7611U/2K5 Overview
A digital-to-analog converter (DAC) is a data-conversion integrated circuit that translates a binary digital word into a proportional analog voltage or current. The DAC sits within the broader data-converter IC family, which also includes analog-to-digital converters (ADCs); both are essential building blocks of mixed-signal systems that bridge the real-world analog domain and digital processors. The DAC7611 belongs to the low-power, single-channel, voltage-output, serial-interface sub-category used in compact, microprocessor-controlled designs.
Key specifications include 12-bit resolution, 1 mV per LSB step size with a 4.095 V full-scale range, and 7 µs settling time to within 1 LSB for a full-scale step. The device integrates an input shift register, latch, 2.435 V internal reference, R-2R DAC core, and high-speed rail-to-rail output amplifier on a single die. A 3-wire serial interface operates to a 20 MHz clock. Asynchronous reset clears the output to zero scale without requiring a serial write.
The architecture uses an R-2R ladder network driven by a precision bandgap reference and a 5 V single supply. The internal reference is laser-trimmed for low drift, and the rail-to-rail output stage swings within millivolts of either supply rail, eliminating the need for a negative supply in unipolar systems. Power consumption is 2.5 mW typical (0.5 mA at 5 V), suiting battery-powered instrumentation.
Typical applications include industrial process-control analog output modules, programmable logic controller (PLC) setpoint generators, digitally controlled calibration sources, portable test equipment, and closed-loop servo setpoint references. The 4.095 V full-scale range with 1 mV LSB aligns naturally with 0-5 V analog I/O standards used in factory-automation backplanes.
When designing with this device, place the 0.1 µF power-supply bypass capacitor as close as possible to the AVDD pin and observe standard SPI-mode timing for SDI, CLK, and /CS. The asynchronous CLR pin overrides any serial write and pulls the output to zero, which is useful for failsafe initialization in safety-critical loops.
This page synthesizes distributor pricing, drop-in SOIC-8 alternatives, and PCB-layout design notes that are not consolidated in the manufacturer datasheet.
Drop-in alternatives for DAC7611U/2K5 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
DAC7611UB/2K5
✅ Drop-In📋 Reference alternative (not in catalog)
DAC7611U
✅ Drop-In📋 Reference alternative (not in catalog)
DAC7611UB
✅ Drop-In📋 Reference alternative (not in catalog)
AD5684BRUZ
✅ Drop-In📋 Reference alternative (not in catalog)
DAC8512FSZ
✅ Drop-In📋 Reference alternative (not in catalog)
DAC7611U/2K5 Maximum Ratings & Electrical Characteristics
| Resolution | 12 bit |
| Number of Channels | 1 |
| Interface Type | Serial (3-wire SPI-compatible) |
| Settling Time (to 1 LSB) | 7 µs (typ, full-scale step) |
| Output Type | Voltage, rail-to-rail buffered |
| Full-Scale Output Range | 0 V to 4.095 V |
| LSB Step Size | 1 mV |
| Internal Reference Voltage | 2.435 V |
| Supply Voltage (AVDD) | 5 V (single, +4.75 V to +5.25 V) |
| Supply Current (typ) | 0.5 mA |
| Power Dissipation (typ) | 2.5 mW |
| Serial Clock Frequency (max) | 20 MHz |
| Monotonicity | 12-bit (over -40°C to +85°C) |
| Operating Temperature Range | -40°C to +85°C |
| Package | 8-pin SOIC (D) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited) |
| RoHS Status | Compliant |
| Asynchronous Clear (CLR) | Yes (active-low, resets output to 0 V) |
| Packaging Quantity | 2,500 per reel (/2K5 suffix) |
DAC7611U/2K5 Pin Configuration
| Pin 1 | AVDD — Analog supply (+5 V nominal) |
| Pin 2 | REF+ — Internal reference output (2.435 V) |
| Pin 3 | GND — Ground |
| Pin 4 | CLR — Asynchronous clear (active-low, resets output to 0 V) |
| Pin 5 | SDI — Serial data input |
| Pin 6 | CLK — Serial clock input (up to 20 MHz) |
| Pin 7 | /CS — Chip select (active-low) |
| Pin 8 | OUT — Analog voltage output (0 V to 4.095 V) |
Typical Applications
DAC7611U/2K5 is suitable for 6 applications: Industrial Process Control Analog Output Modules, PLC Setpoint and Valve Position Generators, Digitally Controlled Calibration Sources, Portable Battery-Powered Test Equipment, Closed-Loop Servo Setpoint References, Audio Test Signal and Bias Generators.
Industrial Process Control Analog Output Modules
The DAC7611U/2K5 fits 4-20 mA current-loop and 0-10 V analog output modules in industrial process-control systems where 12-bit resolution and 0-5 V unipolar swing are sufficient. Its 1 mV LSB (4.095 V full-scale) and 7 µs settling enable accurate setpoint generation at loop rates up to several kHz, while the integrated 2.435 V reference eliminates the cost of an external reference IC. The 8-pin SOIC footprint suits compact DIN-rail I/O cards, and the -40°C to +85°C industrial temperature range matches factory-floor ambient conditions.
Recommended
PLC Setpoint and Valve Position Generators
The DAC7611U/2K5 serves as the analog setpoint generator in programmable logic controller (PLC) analog output cards that drive proportional hydraulic valves and motor-speed references. Its 3-wire SPI interface connects directly to industrial microcontrollers over SPI buses up to 20 MHz, allowing fast updates of multiple analog channels via chip-select daisy-chaining. The asynchronous CLR pin is critical for failsafe initialization on power-up, forcing outputs to 0 V before firmware initializes the DAC. Rail-to-rail swing allows direct drive of 0-5 V valve drivers without signal conditioning.
Recommended
Digitally Controlled Calibration Sources
The DAC7611U/2K5 is well-suited as the precision voltage source in automated calibration fixtures for sensor-trim, ATE, and bench-test equipment. Its 1 mV LSB resolution combined with the integrated 2.435 V reference provides the stability required to drive calibration inputs of multi-meters, oscilloscope calibrators, and strain-gauge signal conditioners. The 8-pin SOIC package fits into small daughter-boards that drop into ATE test heads, and the 0.5 mA typical supply current keeps thermal dissipation low in dense fixtures. The serial interface enables scripted test sequences under host PC control.
Recommended
Portable Battery-Powered Test Equipment
The DAC7611U/2K5 is a strong fit for handheld and battery-powered test instruments such as process calibrators, loop testers, and field service tools. Its 2.5 mW typical power consumption (0.5 mA at 5 V) preserves runtime when operating from USB or 4 AA cells, and the 5 V single-supply operation matches the Li-ion / USB rail. The integrated amplifier drives low-impedance loads directly without an external buffer, saving PCB area and quiescent current. The 4.095 V full-scale output covers the standard 0-5 V process-control range without scaling resistors.
Recommended
Closed-Loop Servo Setpoint References
The DAC7611U/2K5 serves as the digital setpoint reference in motion-control and servo-drive systems, providing the analog target position or velocity command to the servo amplifier stage. Its 7 µs settling time is adequate for servo loop bandwidths up to several kHz, and its 12-bit resolution supports sub-mil positioning resolution in small stepper or DC-servo systems. The 3-wire SPI interface allows multiple DAC channels to share a single MCU SPI bus via chip-select, enabling multi-axis drives. The asynchronous CLR provides a hard-zero reference for emergency-stop conditions.
Recommended
Audio Test Signal and Bias Generators
The DAC7611U/2K5 functions as a DC bias and test-tone generator in audio test fixtures and audio analyzer calibration systems. Its 1 mV LSB step provides sufficient resolution to set bias points for headphone amplifiers, microphone pre-amps, and line-level drivers. The integrated reference and low-noise architecture produce a clean DC reference, while the serial SPI control allows automated test scripts to step through bias sequences. The 8-pin SOIC fits into compact audio daughter-boards, and the 0.5 mA supply current keeps thermal noise low.
Recommended
Recommended Products Summary
Engineering reference data for DAC7611U/2K5 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | DAC7611UB/2K5 | DAC7611U | DAC7611UB | AD5684BRUZ | DAC8512FSZ |
|---|---|---|---|---|---|---|
| Package | SOIC-8 (D) | SOIC-8 (D) - same | SOIC-8 (D) - same | SOIC-8 (D) - same | SOIC-8 (D) - same | SOIC-8 (D) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Analog Devices |
| Resolution | 12 bit | 12 bit | 12 bit | 12 bit | 14 bit | 12 bit |
| Full-Scale Output | 0 V to 4.095 V | 0 V to 4.095 V | 0 V to 4.095 V | 0 V to 4.095 V | 0 V to 5 V (with ext ref) | 0 V to VDD (with ext ref) |
| Settling Time (to 1 LSB) | 7 µs | 7 µs | 7 µs | 7 µs | 5 µs | 16 µs |
| Internal Reference | Yes (2.435 V) | Yes (2.435 V) | Yes (2.435 V) | Yes (2.435 V) | Yes (2.5 V) | No (external required) |
| Interface | 3-wire SPI (20 MHz) | 3-wire SPI (20 MHz) | 3-wire SPI (20 MHz) | 3-wire SPI (20 MHz) | 3-wire SPI (50 MHz) | 3-wire SPI |
| Supply Current (typ) | 0.5 mA | 0.5 mA | 0.5 mA | 0.5 mA | 1.5 mA | 0.3 mA |
| Asynchronous CLR | Yes | Yes | Yes | Yes | Yes | No |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +105°C | -40°C to +85°C |
Key Differentiators
- Integrated 2.435 V reference on-chip (vs DAC8512FSZ (Analog Devices))
- 3x faster settling time (vs DAC8512FSZ (Analog Devices))
- Lower supply current for battery-powered designs (vs AD5684BRUZ (Analog Devices))
- Asynchronous CLR pin for failsafe initialization (vs DAC8512FSZ (Analog Devices))
Design Notes
Place the 0.1 µF AVDD bypass capacitor within 3 mm of the AVDD pin (pin 1) with a short, low-inductance trace to ground (pin 3). Add a 10 µF bulk tantalum or ceramic capacitor at the supply entry point. Per TI reference designs for the DAC7611 family, isolated analog and digital ground planes tied at a single point near the DAC GND pin minimize switching noise coupling into the analog output. Keep digital SPI traces away from the OUT pin trace to avoid injected digital noise on the analog output.
The 3-wire SPI interface accepts clock rates up to 20 MHz. When operating near this maximum, ensure the SPI traces are length-matched and terminated with a series resistor near the driver if reflections exceed 10% of VDD. Per the DAC7611 datasheet timing diagram, SDI is sampled on the rising edge of CLK; CS must be held low for the entire 16-bit transfer (12 data + 4 don't-care). Tie unused SDO high or low through a 100 kΩ resistor to avoid floating-state current draw.
Do not connect a capacitive load directly to the OUT pin unless a series isolation resistor (typically 50-100 Ω) is placed between the output amplifier and the load; capacitive loads > 200 pA cause the rail-to-rail output stage to oscillate. Per TI application notes, the asynchronous CLR pin must be tied high through a 100 kΩ pull-up if unused, or driven by a clean logic signal during power-up to ensure a defined initial output value. The internal reference at REF+ (pin 2) should be decoupled with a 0.1 µF capacitor to GND to suppress reference noise.
The DAC7611U/2K5 dissipates approximately 2.5 mW at 5 V supply (0.5 mA × 5 V) under normal operation, so thermal management is not a concern. However, when the output is short-circuited to ground, the internal output amplifier current limit triggers and the device enters thermal shutdown if the short persists. The SOIC-8 package has a θJA of approximately 160 °C/W; sustained short-circuit conditions can exceed 150 °C junction temperature within seconds. Ensure output traces are protected from accidental shorts to high-current rails.
Compliance Information
RoHS compliant per TI product page and distributor listings. Not AEC-Q100 qualified - this is an industrial-grade part; no automotive-grade variant exists in the DAC7611 family. Lead-free reflow profile per JEDEC J-STD-020.
