Analog Devices Inc. AD5339BRM

Overview

AD5339BRM from Analog Devices is a dual-channel, 12-bit buffered voltage-output DAC in an 8-lead MSOP package, operating from 2.5 V to 5.5 V with 250 μA typical supply current at 3 V. It features I²C-compatible 2-wire serial interface (up to 400 kHz), rail-to-rail output buffers (0 V to VREF), and simultaneous output update via LDAC. Used in precision programmable voltage sources and industrial process control loops.

For engineers reviewing the AD5339BRM datasheet, AD5339BRM pinout, AD5339BRM application, or AD5339BRM equivalent, key selection considerations include its 12-bit resolution, guaranteed monotonicity, 80 nA power-down current at 3 V, double-buffered input logic, and shared reference architecture enabling matched dual-channel operation without external trimming.

Technical Context

The AD5339BRM implements two independent resistor-string DAC cores, each followed by a rail-to-rail output buffer amplifier with 0.7 V/μs slew rate and ±25 mA short-circuit capability. Its 2-wire interface supports SMBus compatibility below 3.6 V and allows up to two devices on one bus via A0 address pin configuration.

Power-on reset ensures both DAC outputs initialize to 0 V; software clear and LDAC functions provide deterministic control over register states and output updates. Three programmable power-down modes (1 kΩ, 100 kΩ, or high-Z) reduce IDD to 80 nA at 3 V while preserving register contents.

Key Specifications

Pinout & Package

AD5339BRM is housed in an 8-lead MSOP (Mini Small Outline Package) with 0.65 mm lead pitch, thermally enhanced for compact PCB layouts and moderate power dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel voltage-output DAC applications.

Compared with AD5338BRM, AD5339BRM provides 4× finer resolution and tighter linearity for high-fidelity control; compared with AD5662ARMZ-REEL7, it offers native dual-channel coordination, I²C simplicity, and lower system-level component count despite lower bit depth.

Availability

AD5339BRM is available at Aetrix Electronics and suitable for industrial process control, portable instrumentation, and programmable power supply design requiring stable component supply, long-lifecycle support, and guaranteed traceability.

Supply support for AD5339BRM 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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with decades of expertise in precision data conversion and signal conditioning.

The AD5339BRM belongs to the AD533x family of low-power, dual-channel voltage-output DACs designed specifically for space-constrained, battery-operated, and industrial control applications demanding high accuracy and robust serial interfacing.

FAQ

What is the maximum clock frequency supported by the AD5339BRM 2-wire interface?

The AD5339BRM supports I²C-compatible 2-wire serial communication up to 400 kHz. This timing is validated across the full operating temperature range (−40°C to +105°C) and supply voltage range (2.5 V to 5.5 V). At VDD < 3.6 V, the interface is also SMBus-compliant, ensuring interoperability with microcontrollers and PMICs implementing that protocol. The AD5339BRM does not require external clock conditioning or level-shifting for standard I²C master operation.

Does the AD5339BRM support simultaneous update of both DAC outputs?

Yes, the AD5339BRM supports simultaneous update of both VOUTA and VOUTB using the hardware LDAC (Load DAC) pin or software LDAC command. When LDAC is asserted (low), the contents of both DAC registers are transferred to their respective output buffers in a synchronized manner, eliminating inter-channel skew and minimizing transient crosstalk. This feature is essential for applications such as differential signal generation or matched actuator control where timing coherence between channels is critical. The AD5339BRM retains this capability across all power modes and temperature conditions.

What is the guaranteed monotonicity behavior of the AD5339BRM over temperature?

The AD5339BRM is guaranteed monotonic by design across its entire operating temperature range of −40°C to +105°C. This guarantee is achieved through its resistor-string architecture and is verified during characterization-not just tested in production. Monotonicity holds for all 4096 codes (0x000 to 0xFFF), meaning no code produces a lower output voltage than the preceding code. This ensures predictable, glitch-free behavior in closed-loop control systems and eliminates risk of instability due to non-monotonic transfer characteristics. The AD5339BRM maintains this property regardless of supply voltage or reference voltage within spec.

Can the AD5339BRM operate with a reference voltage lower than 2.5 V?

Yes, the AD5339BRM accepts reference voltages from 0.25 V up to VDD, making it compatible with low-voltage precision references such as the REF192 (2.048 V) or REF02 (2.5 V), as well as fractional references derived from bandgap sources. Operation at 0.25 V yields a full-scale output range of 0–0.25 V with 61 μV LSB step size. Input impedance at REFIN is typically 45 kΩ in normal mode and >10 MΩ in power-down, minimizing loading effects on external reference circuits. The AD5339BRM's specification tables confirm performance down to 0.25 V reference under all operating conditions.

How does the AD5339BRM handle power-on initialization?

The AD5339BRM incorporates an internal power-on reset circuit that forces both DAC output buffers to 0 V and loads zeros into all input and DAC registers upon power application. This behavior is guaranteed across the full supply ramp (2.5 V to 5.5 V) and temperature range. No external reset signal is required. The AD5339BRM remains in this defined 0 V state until the first valid write command is received via the 2-wire interface. This eliminates unpredictable output transients during system startup-critical for protecting downstream circuitry such as op-amps, sensors, or actuators connected directly to VOUTA or VOUTB.