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LT3032

双通道、150mA、正 / 负、低噪声、低压差线性稳压器

英文数据手册

推荐新设计使用

顶部

概览

优势和特点
产品详情

优势和特点

低噪声：20μV_RMS (正) 和 30μV_RMS (负)
低静态电流：每通道 30μA
宽输入电压范围：±2.3V 至 ±20V
输出电流：±150mA
低停机电流：总值 <3μA (典型值)
低压差电压：每通道 300mV
固定输出电压: ±3.3V、±5V、±12V 和 ±15V
可调输出从 ±1.22V 至 ±20V
无需保护二极管
采用 2.2μF 输出电容器可稳定
采用陶瓷电容器、钽电容器或铝电容器可稳定
可在反向输出电压条件下起动
电流限制和热限制
扁平 14 引脚 4mm x 3mm x 0.75mm DFN 封装

产品详情

LT^®3032 是一款双通道、低噪声、正和负低压差电压线性稳压器。每个稳压器可提供高达 150mA 电流和一个 300mV 的典型压差电压。每个稳压器的静态电流很低 (工作时为 30μA，而在停机模式则为 <3μA)，并在压差条件下处于良好受控状态，从而使其成为电池供电型电路的较佳选择。

LT3032 另一个重要的特点是低输出噪声。给每个稳压器增设一个外部 10nF 旁路电容器，可以将输出噪声降低至 20μV_RMS/ 30μV_RMS (在 10Hz 至 100kHz 的带宽内)。LT3032 能够在采用 2.2μF (最小值) 输出电容器时保持稳定。该稳压器不像其他稳压器所常见的那样需要额外的 ESR。

这些稳压器可提供低至 ±1.22V 基准电压的可调输出，或固定输出在 ±3.3V、±5V、±12V 和 ±15V 。内部保护电路包括反向输出保护、电流限制和热限制。

LT3032 采用一种独特的扁平 14 引脚 4mm x 3mm x 0.75mm DFN 封装，该封装具有用于每个稳压器的裸露背部衬垫，因而实现了优质的热性能。

应用

电池供电型仪器
双极电源
低噪声电源

产品分类

电源管理
- 正线性稳压器(LDO)
- 负线性稳压器(LDO)

领域

仪器仪表和测量 (2)
- 阻抗测量和分析
- 适用于仪器仪表的电源电路

产品生命周期推荐新设计使用

本产品已上市。数据手册包含所有最终性能规格和工作条件。ADI公司推荐新设计使用这些产品。

评估套件 (2)

EVAL-ADMX1002

Ultra-low Distortion Signal Generator Measurement Module

DC1622A

LT3032IDE Demo Board | Dual Positive/Negative, Low Noise, Low Dropout Linear Regulator, ±2.3V ≤ V_IN ≤ ±20V, V_OUT = ±1.2/±3.3/±5/±12/±15V @ ±150mA

EVAL-ADMX1002

查看此评估套件详细信息

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.

Applications

High-end audio test
Analog-to-digital converter characterization and test
Sensor and transducer test
Frequency response and network analysis
ATE

优势和特点

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

软件

ADMX1002 Graphical User Interface (GUI)

DC1622A

查看此评估套件详细信息

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 20μV_RMS (positive regulator)/30μV_RMS (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.