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Features and Benefits
- Low Noise: 20μVRMS (Positive) and 30μVRMS (Negative)
- Low Quiescent Current: 30μA/Channel
- Wide Input Voltage Range: ±2.3V to ±20V
- Output Current: ±150mA
- Low Shutdown Current: <3μA Total (Typical)
- Low Dropout Voltage: 300mV/Channel
- Fixed Output Voltages: ±3.3V, ±5V, ±12V, ±15V
- Adjustable Outputs from ±1.22V to ±20V
- No Protection Diodes Needed
- Stable with 2.2μF Output Capacitors
- Stable with Ceramic, Tantalum or Aluminum Capacitors
- Starts into Reverse Output Voltage
- Current Limit and Thermal Limit
- Low Profile 14-Lead 4mm × 3mm × 0.75mm DFN Package
The LT3032 is a dual, low noise, positive and negative low dropout voltage linear regulator. Each regulator delivers up to 150mA with a typical 300mV dropout voltage. Each regulator’s quiescent current is low (30μA operating and <3μA in shutdown) and well-controlled in dropout, making it an excellent choice for battery-powered circuits.
Another key feature of the LT3032 is low output noise. Adding an external 10nF bypass capacitor to each regulator reduces output noise to 20μVRMS/30μVRMS over a 10Hz to 100kHz bandwidth. The LT3032 is stable with minimum output capacitors of 2.2μF. The regulators do not require the addition of ESR as is common with other regulators.
The regulators are offered as adjustable output devices with an output voltage down to the ±1.22V reference voltage or in fixed voltages of ±3.3V, ±5V, ±12V and ±15V. Internal protection circuitry includes reverse-output protection, current limiting and thermal limiting.
The LT3032 is available in a unique low profile 14-lead 4mm × 3mm × 0.75mm DFN package with exposed backside pads for each regulator, allowing optimum thermal performance.
- Battery-Powered Instruments
- Bipolar Power Supplies
- Low Noise Power Supplies
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (2)
The ADMX1002 is an ultra-low distortion sinewave and high-resolution arbitrary waveform generator. This high-performance module demonstrates a proprietary digital pre-distortion algorithm that reduces signal distortion below levels that can be achieved with high-performance digital-to-analog converters (DAC) and amplifiers alone. Its differential output can be set to common-mode levels often required to test high-performance analog-to-digital converters (ADC), audio codecs, and other audio ICs and systems. With an easy-to-use SPI interface and small-form factor, the ADMX1002 can be easily embedded into test systems, or simply used on the bench for measurement and characterization.
- High-end audio test
- Analog-to-digital converter characterization and test
- Sensor and transducer test
- Frequency response and network analysis
Features & Benefits
- Ultra-low distortion, high-resolution source
- DC to 40kHz
- Proprietary digital pre-distortion (DPD) algorithm
- –130dBc THD @ 1kHz (typ.)
- Arbitrary waveform generation (AWG) with on-board pattern memory
- Differential (balanced) output up to 3.6VRMS
- Fast pattern switching between multiple stored waveforms
- Small form-factor (60mm x 40mm)
- Low power, 1W typ. (quiescent)
- SPI interface for integration into test and measurement systems
Demonstration circuit 1622A is a dual 150mA linear regulator featuring the LT3032. The LT3032 is a dual, positive and negative low dropout linear regulator. Each regulator supplies up to 150mA of output current with a typical 300mV dropout voltage. Each regulator’s quiescent current is low (<3μA total in shutdown) and well-controlled in dropout, making it an excellent choice for battery-powered circuits. A 0.01μF bypass capacitor to each regulator reduces output voltage noise to 20μVRMS (positive regulator)/30μVRMS (negative regulator) over a 10Hz to 100kHz bandwidth. The LT3032 is stable with minimum output capacitor of 2.2μF. The regulators do not require any additional ESR. Internal protection circuitry includes reverse output protection, current limiting and thermal limiting. Each regulator is offered as an adjustable output device with an output voltage range down to the ±1.22V reference voltages.
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.
Models for the following parts are available in LTspice:
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Technical Articles (1)
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Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.