LT3040
Info : RECOMMENDED FOR NEW DESIGNS
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LT3040

20V, 200mA, Ultralow Noise, Ultrahigh PSRR Precision DAC/Reference Buffer

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 8
1ku List Price Starting From $2.65
Features
  • Ultralow Wideband Noise: 1.2µVRMS (10Hz to 100kHz)
  • Ultralow 1/f Noise: 0.6µVP-P (0.1Hz to 10Hz)
  • Ultralow Spot Noise: 4nV/√Hz at 1kHz and Above
  • Ultrahigh PSRR: 73dB at 1MHz
  • Ultralow Input Offset: 125µV
  • Output Source Current: 200mA
  • Wide Input Voltage Range: 1.8V to 20V
  • Rail to Rail Output Voltage Range: 0V to 15V
  • Single Capacitor Improves Noise and PSRR
  • Fast Start-Up for VIN Pin
  • FAULT Flag
  • High Bandwidth: 1MHz
  • Low Dropout Voltage: 350mV
  • Programmable Current Limit
  • Precision Enable/UVLO
  • Parallelable for Lower Noise and Higher Current
  • Internal Current Limit with Foldback
  • Minimum Output Capacitor: 4.7µF Ceramic
  • Reverse Supply and Reverse Current Protection
  • Thermal Limit with Hysteresis
  • 10-Lead 3mm × 3mm DFN and 12-Lead MSOP
Additional Details
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The LT3040 is a high performance, robust Voltage Output Reference/DAC buffer that employs a unique architecture that seeks to maintain the precision and accuracy of the Reference or DAC while sourcing up to 200mA. It features ADI’s ultralow noise and ultrahigh PSRR architecture for powering noise sensitive, high accuracy systems. Designed as an advanced voltage buffer for Voltage Output References/DACs, the LT3040 features extremely low 1/f noise, very low wideband noise, excellent PSRR over a wide frequency range and low dropout performance – a typical 350mV dropout at 200mA of source current.

Operating quiescent current is nominally 2.5mA and drops to <1μA in shutdown. The LT3040’s wide output voltage range (0V to 15V) while maintaining unity-gain operation provides virtually constant output noise, PSRR, bandwidth and load regulation independent of the VIN voltage. Additionally, the buffer features programmable current limit, fast start capability and a FAULT flag to indicate faults on the output.

The LT3040 is stable with a minimum 4.7μF ceramic output capacitor. Built-in protection includes reverse supply voltage protection, reverse current protection, internal current limit with fold-back and thermal limit with hysteresis. The LT3040 is available in thermally enhanced 12-Lead MSOP and 10-Lead 3mm × 3mm DFN packages.

Applications

  • High Speed/High Precision Data Converters
  • High Precision Voltage References
  • Very Low Noise Instrumentation
Part Models 8
1ku List Price Starting From $2.65

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Feb 4, 2020

- 20_0129

Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC

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Feb 4, 2020

- 20_0129

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Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC

LT3040EMSE#PBF

PRODUCTION

LT3040EMSE#TRPBF

PRODUCTION

LT3040IMSE#PBF

PRODUCTION

LT3040IMSE#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

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AD-APARD32690-SL

Arduino Form-factor Development Platform Based on MAX32690 ARM Cortex-M4 Microcontroller

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AD-APARD32690-SL

Arduino Form-factor Development Platform Based on MAX32690 ARM Cortex-M4 Microcontroller

Arduino Form-factor Development Platform Based on MAX32690 ARM Cortex-M4 Microcontroller

Features and Benefits

  • Allows prototyping of intelligent, secure, and connected industrial field devices
  • Arduino Mega-compatible form factor
  • Two Pmod™-compatible connectors
  • ARM Cortex-M4 Ultra Efficient Microcontroller with integrated Bluetooth 5.2 LE
  • WiFi connectivity
  • Long-range, single-pair 10BASE-T1L Ethernet interface
  • Built-in security for root-of-trust, mutual authentication, data confidentiality and integrity, secure boot, and secure communications
  • Open-source software stack

Product Detail

The AD-APARD32690-SL is a platform for prototyping intelligent, secure, and connected field devices. It has an Arduino Mega-compatible form factor and two Pmod™-compatible connectors.

The system includes the MAX32690 ARM Cortex-M4 with FPU-Based Microcontroller and Bluetooth LE 5.2. The MCU is coupled with external RAM (2 x 512 Mb) and Flash (64 Mb) memories to meet the requirements of the most demanding applications. The MAXQ1065 security coprocessor enables state of the art security features such as for root-of-trust, mutual authentication, data confidentiality and integrity, secure boot, and secure communications.

A 10 Mbps single-pair Ethernet link using the ADIN1110 10BASE-T1L MAC/PHY, enables remote data acquisition and system configuration. The 10BASE-T1L interface also supports Single-pair Power over Ethernet (SPoE) and be used for powering the system via an Arduino shield implementing the required power circuitry.

WiFi connectivity is provided via the on-board NINA-W102 multiradio wireless MCU module with internal antenna.

Power can be supplied either via the USB-C connector or via a 2-pin terminal block. The supported input voltage range is 5 V to 28 V.

The system is accompanied by an open-source software stack and associated collateral, enabling a complete experience from evaluation, and prototyping, all the way to production firmware and application development. The open-source software stack also includes drivers and example applications for a wide variety of ADCs, DACs, sensors, and other devices commonly used in industrial applications, further accelerating the development process. An external programmer such as the MAX32625PICO DAPLink, or any other similar programmer supporting the SWD interface, enables firmware programming and debug. The system’s firmware is based on Analog Devices’ open-source no-OS framework which includes all the tools required for embedded code development and debugging as well as libraries, enabling host-side connectivity for system configuration and data transfer over the UART, USB, WiFi, and 10BASE-T1L interfaces.

APPLICATIONS

  • Factory automation
  • Process control
  • Intelligent buildings
  • Secure field instruments
  • Internet of Things
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DC2783A

LT3040EDD Demo Board | 20V, 200mA, Ultralow Noise, Ultrahigh PSRR Precision DAC/Reference Buffer

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DC2783A

LT3040EDD Demo Board | 20V, 200mA, Ultralow Noise, Ultrahigh PSRR Precision DAC/Reference Buffer

LT3040EDD Demo Board | 20V, 200mA, Ultralow Noise, Ultrahigh PSRR Precision DAC/Reference Buffer

Product Detail

Demo board DC2783A features the LT3040, a 200mA high performance, robust voltage reference/DAC buffer. LT3040 has ultralow output noise, ultrahigh power supply rejection ratio (PSRR) and low dropout voltage for powering noise sensitive, high accuracy systems.

DC2783A has two inputs: V+ and VIN. V+ supplies power to the buffer, operating over a range from 2V to 20V. VIN is the regulation set-point for the output with a range from 0V to 15V. Current limit is programmable by connecting a resistor, R3, from ILIM to GND. The ILIM can also serve as a current monitor pin with a range from 0V to 300mV.

LT3040 has fast start capability. Connecting FS pin across an input low pass filter resistor, R2, fast starts the LT3040. Fast start circuitry is typically triggered active if VFS − VIN ≥ 100mV and stays active until VFS – VIN ≤ 7mV. If fast start functionality is not needed, connect FS to VIN by setting R2 to 0Ω and applying the input voltage at FS.

LT3040 has a fault flag to indicate faults at the output. Built-in protection includes reverse battery protection, reverse current protection, internal current limit with foldback and thermal limit with hysteresis.

The LT3040 datasheet gives a complete description of the part, operation and applications information. The datasheet must be read in conjunction with this Demo Manual for demonstration circuit DC2783A. The LT3040 is assembled in a 12-lead MSOP and a 10-lead (3mm x 3mm) plastic DFN package with an exposed pad on the bottom-side of the IC. Proper board layout is essential for maximum thermal performance. 

Tools & Simulations

Tools & Simulations 1

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.

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