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Category: Amplifiers Reference Designs

±1A Single-Supply Low-Side Current Sensing Solution Reference Design

This single-supply low-side: bi-directional current sensing solution can accurately detect load currents from -1 A to 1 A. The linear range of the output is from 110 mV to 3.19 V. The design utilizes the OPA2313 configured as a difference amplifier and reference voltage buffer.
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±50A Current Sensor using Closed-Loop Compensated Hall Element Reference Design

This TI Precision Verified Design provides a complete closed loop Hall based current transducer signal conditioning solution.  The circuit features the DRV411 and is designed to accurately measure dc: ac and pulsed currents to +/-50 A with galvanic isolation between the primary and secondary circuits.  The DRV411 provides Hall excitation: a compensation coil driver and a precision difference…
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0-1A: Single-Supply: Low-Side: Current Sensing Solution

This TI Verified Design implements a single-supply: low-side current sensing solution that can accurately detect load current from 0-1A.  The corresponding linear output range is from 0V to 4.9V. This design relies on the LM7705 inverting charge pump to bias the negative supply of the OPA320 to -0.23V. This setup extends the linear output range of the amplifier below 0V.  The circuit's linear…
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0.1-10Hz Amplifier Noise Measurement Filter Reference Design

This circuit is designed to amplify low frequency noise (0.1Hz to 10Hz) to a level that is easily measured by and oscilloscope. It achieves this function with a 0.1Hz second order high pass filter and a to 10Hz forth order low pass filter. The 0.1Hz to 10Hz noise measurement is a common figure of merit given in amplifier data sheets. This design is intended to facilitate the measurement 0.1Hz to…
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1-kW/36-V Power Stage for Brushless Motor in Battery Powered Garden and Power Tools Reference Design

This reference design is a power stage for brushless motors in battery-powered garden and power tools rated up to 1 kW. The power stage operates from a 10-cell lithium-ion battery with a voltage range from 36 to 42 V. The design uses CSD18540Q5B NexFETs featuring a very low drain-to-source resistance (RDS_ON ) of 1.8 mΩ in a SON5x6 SMD package: which results in a very small form factor of 57 ×…
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10uA-100mA: 0.05% Error: High-Side Current Sensing Solution Reference Design

This TI Precision Verified Design provides the theory: component selection: simulation: complete PCB schematic and layout: bill of materials: and measured performance of a split-supply: high-side four decade current sensing solution that can accurately detect load currents from 10uA-100mA. The corresponding linear output is from 10mV to 4.9V which enables measurement by common 5V ADCs. The design…
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12-bit: 20-MSPS Data Acquisition Reference Design for Digitizer

This reference design enables a cost-effective and low-power data acquisition system that provides an alternative to FPGA-based systems. It features a single-ended: high-impedance input that can be used in a wide number of applications: including portable instrumentation and digitizers.The reference design utilizes the ADS4122 analog-to-digital converter (ADC): along the with the OPA656 and…
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12-Gbps SDI and Video Over IP Repeater With Reclocking Function

This verified reference design is a 12G SDI and Video over IP repeater with reclocking function compatible with SMPTE (ST-2082: ST-2081: ST-424: ST-292: and ST-259) and 10 GbE electrical requirements. This design is applicable to either coax or optical cable applications.
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12V and 24V Brushless DC Outrunner Motor Reference Design

This 6 cm motor is form-factor ready; simply hook up the power and watch it spin!  The simple and reliable design is easy to modify to support speed and current system needs.  The magnetic rotor position is sensed by the DRV5013 Hall-effect sensors: and the DRV8307 controller decides when to drive the CSD88537ND FETs that energize the coils.
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12V BLDC Server Fan with Sensorless Sinusoidal Control

This is a reference design for a 12V 3-phase brushless DC fan: intended for server cooling applications.  It is based on a single IC controller: the DRV10975: which drives sensorless BLDC motors with sinusoidal current that minimizes acoustic noise and torque ripple.  The design requires no microcontroller or firmware: enabling a faster time to market.
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16-bit 400KSPS 4-Ch. Multiplexed Data Acquisition Ref Design for High Voltage Inputs: Low Distortion

This TI Verified Design implements a 16-bit: differential 4-channel multiplexed data acquisition system at 400KSPS throughput for high voltage differential input of ±20 V (40 Vpk-pk) industrial applications. The circuit is realized with a 16-bit successive-approximation-resistor (SAR) analog-to-digital converter (ADC): a precision high voltage signal conditioning front end: and a 4-channel…
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16-Bit: 1MSPS Multiplexed Data Acquisition Reference Design

This design is for a 16-bit 1MSPS single-ended: multiplexed data acquisition system (DAQ) for dc inputs. The system is composed of a 16-bit successive-approximation-register (SAR) analog-to-digital converter (ADC): SAR ADC driver: reference driver: and multiplexer. The design shows the process to optimize a single-ended DAQ to achieve fast settling at a sampling rate of 1MSPS.
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20-bit 1MSPS DAQ Reference Design Optimizing Power Supply Efficiency While Minimizing EMI

This reference design for high performance data acquisition (DAQ) systems optimizes power stage in order to reduce power consumption and minimize the effect of EMI from switching regulator by using LMS3635-Q1 buck converter.  This reference designs yields 7.2% efficiency improvement at most light load current compared to LM53635 buck converter: which achieves 125.25dB SFDR: 99dB SNR and 16.1ENOB.
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20-bit: 1-MSPS: 4-Ch Small Form Factor Design for Test and Measurement Applications Reference Design

End equipment such as mixed signal SOC testers: memory testers: battery testers: liquid-crystal display (LCD) testers: benchtop equipment: high-density digital cards: high-density power cards: x-Ray: MRI: and so forth require multiple: fast: simultaneous sampling channels with excellent DC and AC performance but at low power and in small board spaces. The proposed solution in this design uses…
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3-Terminal PLC Reference Design

This design inputs ±10V or ±20mA and outputs 2.5V±2.3V. It utilizes the INA188: which is a zero-drift instrumentation amplifier. The 2.5V reference voltage is provided by the REF3225. Measured performance yielded just 0.153% error (typical).
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30A Range Bidirectional Current Shunt Monitor Reference Design

This verified design can accurately measure current across a range of 30 A on a bus that carries up to 36-V common mode voltage over a range of -40 °C to +85 °C.  This design can measure current from 0 A to 30 A with a grounded reference or -30 A to 0 A with a 16-V reference.  The design sums the output of two INA250A2 devices and generates a ground-referenced output voltage.  The INA250 is a…
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36V/1kW Brushless DC Motor Drive with Stall Current Limit of

This reference design is a power stage for brushless motors in battery-powered garden and power tools rated up to 1 kW: operating from a 10-cell lithium-ion battery with a voltage range from 36 to 42 V. The design uses 60V: N-channel NexFETsTM featuring a very low drain-to-source resistance (RDS_ON ) of 1.8 mΩ in a SON5x6 SMD package: which results in a very small PCB form factor of 57 × 59 mm.…
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3D Printer Controller (12V)

This design is a complete system for controlling 3-axis: single extruder-based 3D printers. The system is managed by the MSP430F5529 LaunchPad and utilizes the DRV8846 for precision stepper motor control. The CSD18534Q5A is used as a low-side switch for the hot bed heater: extruder heater: and cooling fan. The DRV5033  Hall Sensor acts as a contactless limit switch.
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3G-SDI Repeater With Reclocking Function Reference Design

This verified reference design is functionally an SDI repeater/signal conditioning solution for 3G SDI applications. This reference design is compatible with SMPTE ST-424: ST-292: and ST-259 electrical requirements.
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4.5V to 17V Input: 10-A Synchronous Buck Converter Optimized for Small Size and Low Output Voltage

PMP9194 uses the TPS54020 synchronous-buck SWIFT converter with integrated FETs to provide a 10A/1V solution in less than 22mmx12mm of total board space area. This reference design uses a small 1.1uH inductor: 2x100uF ceramic output capacitors: and small 0402 external components to save space. The device switches at 300kHz and acheives 87% peak efficiency from a 12V input to a 1V output. The…
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