Analog Devices Inc. AD5337BRM

Overview

AD5337BRM from Analog Devices is a dual 8-bit buffered voltage-output DAC with I²C-compatible 2-wire interface, operating from 2.5 V to 5.5 V supply and consuming only 250 μA at 3 V. It delivers rail-to-rail output swing (0 V to VDD), features simultaneous update via LDAC, power-on reset to 0 V, and three power-down modes - ideal for portable instrumentation requiring precise dual-channel analog control.

For engineers reviewing the AD5337BRM datasheet, AD5337BRM pinout, AD5337BRM application, or AD5337BRM equivalent, this page provides verified specifications including monotonic 8-bit performance (±0.15 LSB relative accuracy), 6 μs settling time, 0.7 V/μs slew rate, and MSOP-8 package compatibility - all critical for battery-powered gain/offset adjustment and programmable voltage source designs.

Technical Context

The AD5337BRM implements two independent resistor-string DAC cores, each followed by a rail-to-rail output buffer amplifier. Its 2-wire interface supports up to 400 kHz clock rates and SMBus compatibility below 3.6 V, with address selection via A0 pin enabling multi-device bus configuration.

Reference input (REFIN) is shared between both DACs and accepts 0.25 V to VDD, while internal power-on reset ensures both outputs initialize to 0 V. Double-buffered registers allow asynchronous loading and synchronized LDAC-triggered updates, and power-down modes reduce current to 80 nA at 3 V with configurable output impedance states.

Key Specifications

Pinout & Package

AD5337BRM is housed in an 8-lead MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch) with exposed pad for thermal enhancement. Pin assignments are validated per Analog Devices Rev. C datasheet Figure 3 and Table 5.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD5337BRM, AD5338BRM offers higher resolution at the cost of increased power and complexity, while MCP4725A0T-E/CH sacrifices dual-channel functionality and low-power features for minimal footprint - making AD5337BRM optimal for balanced performance, power, and integration in portable dual-output systems.

Availability

AD5337BRM is available at Aetrix Electronics and suitable for portable instrumentation, digital calibration systems, and industrial analog output modules requiring stable component supply with guaranteed long-term manufacturability.

Supply support for AD5337BRM 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The AD5337BRM belongs to the AD533x family of dual buffered DACs designed specifically for low-power, space-constrained applications demanding rail-to-rail output, I²C simplicity, and robust industrial temperature operation.

FAQ

What is the maximum clock frequency supported by the AD5337BRM 2-wire interface?

The AD5337BRM supports I²C-compatible 2-wire serial communication up to 400 kHz clock frequency (fSCL), as specified in Table 3 of the Rev. C datasheet. This allows efficient register writes and readbacks within tight timing budgets, and the interface remains SMBus-compatible when VDD is below 3.6 V - ensuring interoperability with standard microcontroller peripherals. The AD5337BRM maintains full functionality across its entire operating voltage range without clock rate derating.

Does the AD5337BRM include internal power-on reset functionality?

Yes, the AD5337BRM incorporates a dedicated power-on reset circuit that forces both DAC outputs to 0 V at power-up and holds them there until the first valid write command is received. This behavior is guaranteed across the full −40°C to +105°C temperature range and ensures deterministic startup in safety-critical systems. The AD5337BRM also supports software clear to reinitialize outputs to zero during runtime - providing dual-layer reset assurance.

Can both DAC outputs of the AD5337BRM be updated simultaneously?

Yes, the AD5337BRM supports simultaneous update of VOUTA and VOUTB using the LDAC (Load DAC) function. When LDAC is asserted low (via hardware pin or software command), both DAC registers transfer their contents to the respective output buffers in unison - eliminating inter-channel timing skew. This feature is essential for applications like differential signal generation or coordinated actuator control where output correlation must be preserved.

What are the power-down current specifications for the AD5337BRM?

The AD5337BRM achieves ultra-low power-down current of 80 nA at 3 V and 200 nA at 5 V, as confirmed in Table 1 of the Rev. C datasheet. This is enabled by three configurable power-down modes that disconnect the output amplifiers and disable internal bias networks. The AD5337BRM resumes full operation in ≤5 μs (at 3 V) after exit from power-down - making it ideal for duty-cycled sensor biasing and energy-harvesting systems.

Is the AD5337BRM pin-compatible with other members of the AD533x family?

No, the AD5337BRM is not pin-compatible with AD5338BRM or AD5339BRM despite sharing the same MSOP-8 package and identical pinout. While mechanical fit is identical, functional differences - including resolution-dependent timing, register map variations, and minor electrical parameter shifts - require firmware and validation updates. The AD5337BRM's 8-bit architecture, 6 μs settling time, and ±0.15 LSB accuracy are uniquely optimized for its target applications and must be verified independently.