on December 23th 457

Understanding the AD5328BRU 12-Bit Digital to Analog Converter

You work with systems that need more than one stable voltage, and the AD5328BRU fits naturally into that setup. You can control up to eight outputs from a single chip, keeping your layout clean and simple. Each channel gives you smooth, predictable voltage changes, making adjustments easy to manage. With a serial interface and buffered outputs, you spend less time adding extra parts and more time focusing on how everything works together. It’s a straightforward way to handle multi-channel voltage control without unnecessary complexity.

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AD5328BRU Overview

The AD5328BRU is a 12 bit digital to analog converter that provides eight independent voltage output channels within a single surface mount device. It converts digital input data into stable analog levels suitable for systems that require coordinated multi channel control. Each output is internally buffered, which supports direct connection to external circuits without added components. The device communicates through a serial interface, allowing simple integration with digital control logic. Common uses include signal adjustment, voltage setting, and multi channel control in measurement and automation equipment. Looking for AD5328BRU? Contact us to check current stock, lead time, and pricing.

AD5328BRU Pinout Details

AD5328BRU Pin Description

Pin Number	Pin Name	Description
1	LDAC	Active low control that transfers input register data to DAC registers
2	SYNC	Active low frame sync for serial data transfer
3	VDD	Power supply input, 2.5 V to 5.5 V
4	VOUTA	Buffered analog output from DAC A
5	VOUTB	Buffered analog output from DAC B
6	VOUTC	Buffered analog output from DAC C
7	VOUTD	Buffered analog output from DAC D
8	VREFABCD	Reference input for DAC channels A to D
9	VREFEFGH	Reference input for DAC channels E to H
10	VOUTE	Buffered analog output from DAC E
11	VOUTF	Buffered analog output from DAC F
12	VOUTG	Buffered analog output from DAC G
13	VOUTH	Buffered analog output from DAC H
14	GND	Ground reference for device
15	DIN	Serial data input
16	SCLK	Serial clock input

AD5328BRU CAD Model

AD5328BRU Symbol

AD5328BRU Footprint

AD5328BRU 3D Model

Features of AD5328BRU

High Resolution Digital to Analog Conversion

The device provides 12 bit resolution, producing 4096 distinct output levels. This resolution allows precise adjustment of output voltages, supporting applications that require smooth control and consistent signal steps across the full output range.

Eight Independent Output Channels

Eight separate DAC channels are integrated within a single device. Each channel operates independently, allowing multiple voltage outputs to be controlled at the same time without interaction, which simplifies multi channel system design.

Buffered Voltage Output Structure

Each output includes an internal buffer stage. This buffering allows the output to directly drive external circuits while maintaining stable voltage levels, reducing the need for additional external components.

Fast Output Settling Response

The output voltage settles to its final value in approximately 10 microseconds. This response time supports systems that require timely voltage updates without long delays between code changes.

Serial Digital Interface Support

The device uses a serial interface that aligns with common digital control protocols. This makes it suitable for connection to a wide range of digital control logic using minimal signal lines.

External Reference Voltage Control

An external reference input is provided to define the full scale output range. This allows the output span to be adjusted to match specific system voltage requirements.

Wide Supply Voltage Operating Range

Both the analog and digital sections operate from supply voltages between 2.5 volts and 5.5 volts. This flexibility supports use in low voltage systems and mixed supply environments.

String Based Conversion Architecture

The internal string based conversion structure supports monotonic output behavior and reduces output disturbances during code transitions, helping maintain smooth and predictable voltage changes.

AD5328BRU Technical Specifications

Product Attribute	Attribute Value
Manufacturer	Analog Devices, Inc.
Voltage - Supply, Digital	2.5V ~ 5.5V
Voltage - Supply, Analog	2.5V ~ 5.5V
Supplier Device Package	16-TSSOP
Settling Time	10µs
Reference Type	External
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Package	Tube
Output Type	Voltage - Buffered
Operating Temperature	-40°C ~ 125°C
Number of D/A Converters	8
Number of Bits	12
Mounting Type	Surface Mount
INL/DNL (LSB)	±2, ±0.2
Differential Output	No
Data Interface	SPI, DSP
Architecture	String DAC
Base Product Number	AD5328
Moisture Sensitivity Level (MSL)	1 (Unlimited)
ECCN	EAR99
HTSUS	8542.39.0001

Functional Block Diagram of AD5328BRU

Internal structure is organized around eight identical DAC channels labeled A through H, each built from an input register, DAC register, resistor string core, and output buffer to generate independent analog voltages. Digital control enters through a serial interface using DIN, SCLK, SYNC, and LDAC signals, which manage data loading and register updates across all channels. Two reference inputs, VREFABCD and VREFEFGH, supply programmable full scale levels for separate channel groups, while gain select logic defines output scaling. Power on reset and power down logic manage startup behavior and channel disabling, and buffered outputs VOUTA through VOUTH provide low impedance voltage outputs referenced to VDD and GND.

Typical Application Circuit of AD5328BRU

Circuit configuration presents the AD5328BRU operating with an external voltage reference and a single supply ranging from 2.5 V to 5.5 V. The reference source is connected to the VREFABCD and VREFEFGH pins and is decoupled with a local capacitor to ensure stable reference input for all DAC channels. Supply decoupling is implemented using parallel 0.1 µF and 10 µF capacitors connected between VDD and ground to reduce noise. The serial interface uses SCLK, DIN, and SYNC lines to load digital data, while buffered outputs VOUTA through VOUTH provide independent analog voltages referenced to the external source.

Applications of AD5328BRU

Industrial Automation and Process Control Systems

The AD5328BRU is used to generate control voltages for actuators, valves, and control loops in automated systems. Its multiple output channels allow several process variables to be adjusted from a single device, supporting coordinated and repeatable control in factory and plant environments.

Multi-Channel Data Acquisition Equipment

In data acquisition systems, the device provides programmable reference and calibration voltages across multiple channels. This supports signal conditioning tasks where consistent and adjustable analog levels are needed alongside digital measurement circuits.

Programmable Power Supplies and Bias Generation

The device is suitable for setting output levels in programmable power supplies and bias circuits. Its ability to produce stable voltages across several channels allows different bias points to be controlled independently within the same system.

Audio and Signal Level Control Systems

In audio and general signal control applications, the AD5328BRU adjusts gain levels, offsets, and reference voltages. Smooth output transitions help maintain controlled level changes without abrupt steps during adjustment.

Battery-Powered and Portable Instrumentation

Portable instruments use the device to manage reference voltages and adjustable output levels while operating from low supply voltages. Its integration helps reduce circuit size, which supports compact and power aware designs.

Communication and Test Measurement Systems

The device is applied in communication and test setups to generate programmable voltage levels for tuning, offset control, and signal simulation. Multiple outputs allow different test points to be driven under coordinated digital control.

Outline Dimensions of AD5328BRU

Mechanical drawing defines the physical size and layout of the 16 lead surface mount package, showing a nominal body width and length of approximately 5.00 mm with allowable tolerances. Pin numbering is indicated from pin 1 to pin 16 to establish correct orientation during assembly. Lead pitch is specified at 0.65 mm with controlled coplanarity to ensure proper solder contact on the seating plane. Maximum package height is limited to about 1.20 mm, and side profile views indicate lead bend angles and standoff dimensions that support reliable mounting on printed circuit boards.

Advantages and Disadvantages of AD5328BRU

Advantages

• Eight output channels support compact multi output designs

• Buffered outputs allow direct connection to external circuits

• Wide supply voltage range fits low voltage and standard systems

• Predictable output behavior supports stable voltage control

• Integrated design reduces overall part count

Disadvantages

• 12 bit resolution limits very fine voltage adjustment

• Output settling speed is moderate rather than fast

• External reference input adds an extra design step

• Serial interface limits update rate in some systems

AD5328BRU Alternatives

Part Number	Manufacturer	Key Features	Use Case/Notes
AD5328BRUZ-REEL7	Analog Devices Inc.	12-bit octal DAC with buffered voltage outputs, SPI-compatible interface, low power operation, and support for external reference. Supplied in tape and reel for automated assembly.	Designed for high-volume production where multiple precise analog outputs are required in compact, surface-mount designs.
AD5328BRUZ	Analog Devices Inc.	Same 12-bit resolution and eight buffered voltage outputs, SPI/DSP interface support, and wide supply voltage range in tube packaging.	Suitable for prototyping, testing, or low-volume production where manual handling is preferred.
AD5328BRUZ-REEL	Analog Devices Inc.	Identical electrical performance to the tube version, featuring eight-channel 12-bit DAC architecture with buffered outputs and serial control.	Ideal for automated PCB assembly processes in industrial, instrumentation, and embedded control applications.

About Analog Devices, Inc.

Analog Devices, Inc. is a global technology company known for developing analog, mixed signal, and digital signal processing solutions. The company serves a wide range of markets, including industrial systems, communications, healthcare, automotive, and instrumentation. Its product portfolio includes data converters, amplifiers, power management devices, sensors, and signal processing components that support accurate measurement and control. Analog Devices places strong emphasis on long product lifecycles, system level performance, and consistency across product families, which helps designers build reliable platforms that can be maintained and scaled over time.

Conclusion

The AD5328BRU gives you a simple way to manage multiple voltage outputs from one compact device. Its 12-bit resolution offers smooth control, while eight buffered channels help reduce extra circuitry. The serial interface keeps connections minimal and easy to handle. With flexible supply and reference options, it fits comfortably into many systems. You also benefit from predictable output behavior that supports stable operation. Overall, it’s a practical choice when you want clean, multi-channel analog control without added complexity.

Datasheet PDF

AD5328BRU Datasheet:

AD5328BRU.pdf