Analog Devices Inc. AD5301BRT-500RL7

Overview

AD5301BRT-500RL7 from Analog Devices is an 8-bit buffered voltage-output DAC with I²C-compatible 2-wire interface, 120 μA supply current at 3 V, rail-to-rail output swing (0.001 V to VDD − 0.001 V), and power-down mode consuming only 50 nA at 3 V - used in portable instrumentation for precision digital gain/offset adjustment.

For engineers reviewing the AD5301BRT-500RL7 datasheet, AD5301BRT-500RL7 pinout, AD5301BRT-500RL7 application, or AD5301BRT-500RL7 equivalent, key selection criteria include its 8-bit resolution, SOT-23-6 package, 2.5 V–5.5 V single-supply operation, guaranteed monotonicity, and on-chip power-on reset to 0 V.

Technical Context

The AD5301BRT-500RL7 implements a resistor-string DAC architecture with a rail-to-rail output buffer amplifier (slew rate: 0.7 V/μs; settling time: 6 μs to ±0.5 LSB). Its reference is derived directly from VDD, enabling full-scale output range scaling with supply voltage.

It uses an I²C-compatible 2-wire serial interface with programmable slave address (via A0 pin), supports data readback, and provides three software-selectable power-down modes - including high-Z output and pull-to-ground options - all controlled via two dedicated PD bits in the 16-bit input register.

Key Specifications

Pinout & Package

AD5301BRT-500RL7 is housed in a 6-lead SOT-23 package (JEDEC MO-178AA), optimized for space-constrained PCB layouts and low thermal resistance (θ_JA = 229.6°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP4725A0T-E/CH and MAX538BCSA+, the AD5301BRT-500RL7 uniquely combines I²C compatibility, 50 nA power-down current, rail-to-rail buffered output, and guaranteed monotonicity - making it optimal for space- and power-constrained portable systems needing robust, verified analog control.

Availability

AD5301BRT-500RL7 is available at Aetrix Electronics and suitable for portable instrumentation, digital calibration systems, and programmable analog sources requiring stable component supply, long-term lifecycle support, and guaranteed parametric compliance.

Supply support for AD5301BRT-500RL7 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, serving industrial, automotive, communications, and healthcare markets.

The AD5301BRT-500RL7 belongs to the AD53xx family of low-power, voltage-output DACs designed specifically for battery-operated and space-constrained applications demanding precision, simplicity, and minimal external components.

FAQ

What is the maximum clock frequency supported by the AD5301BRT-500RL7 I²C interface?

The AD5301BRT-500RL7 supports I²C standard-mode operation up to 400 kHz clock frequency, as specified in its timing characteristics. This allows reliable communication with common microcontrollers and avoids timing violations even under worst-case process/voltage/temperature conditions. The device meets all I²C bus timing requirements including t_HIGH, t_LOW, and data setup/hold times per Table 3 of the AD5301/AD5311/AD5321 Rev. C datasheet. AD5301BRT-500RL7 does not support fast-mode (1 MHz) or high-speed mode.

Does the AD5301BRT-500RL7 require an external reference voltage?

No, the AD5301BRT-500RL7 derives its reference voltage internally from the VDD supply pin, eliminating the need for an external precision reference. This simplifies BOM and layout while providing a full-scale output range of 0 V to VDD. The device's relative accuracy (±0.15 LSB typical) and full-scale error (±0.15% of FSR) are specified with VDD as reference. AD5301BRT-500RL7 maintains this architecture across its operating supply range of 2.5 V to 5.5 V.

How does the power-on reset function behave in the AD5301BRT-500RL7?

The AD5301BRT-500RL7 incorporates an internal power-on reset circuit that forces the DAC register to zero upon power application, holding VOUT at 0 V until the first valid I²C write completes. This behavior is guaranteed across the full industrial temperature range (−40°C to +105°C) and supply ramp rates. The reset ensures predictable startup in safety-critical applications like medical sensors or industrial actuators. AD5301BRT-500RL7 does not require external POR circuitry.

Can multiple AD5301BRT-500RL7 devices share the same I²C bus?

Yes, up to two AD5301BRT-500RL7 devices can share one I²C bus using the A0 pin to configure unique 7-bit slave addresses (0x48 or 0x49). The SOT-23-6 package variant lacks A1, limiting address options to two. Each device responds only to its assigned address, enabling coordinated updates without bus contention. AD5301BRT-500RL7 supports repeated start conditions and standard I²C arbitration, ensuring reliable multi-device operation.

What is the output drive capability of the AD5301BRT-500RL7 buffer amplifier?

The AD5301BRT-500RL7's on-chip rail-to-rail output buffer can source or sink up to 20 mA at 3 V and 50 mA at 5 V, as specified in its absolute maximum ratings and typical performance curves. It drives 2 kΩ loads to GND/VDD with 200 pF capacitive loading while maintaining 6 μs settling time. The output impedance is 1 Ω, and short-circuit current is limited to prevent damage. AD5301BRT-500RL7 does not require external buffering for most precision analog outputs.