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運算放大器 (op amps)
一般用途運算放大器

LMP7312

現行

單路、5.5-V、1-MHz 運算放大器

立即訂購
產品規格表

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相同，但引腳輸出與所比較的裝置不同
TLV9001 現行 單通道、1-MHz 軌至軌輸入和輸出 1.8-V 至 5.5-V 運算放大器 Faster slew rate (2 V/us), lower offset voltage (1.6 mV), lower power (0.06 mA)

LMP7312

現行
產品規格表 立即訂購

產品詳細資料

Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.5 Rail-to-rail In, Out GBW (typ) (MHz) 1 Slew rate (typ) (V/µs) 1.4 Vos (offset voltage at 25°C) (max) (mV) 100 Iq per channel (typ) (mA) 2 Vn at 1 kHz (typ) (nV√Hz) 12 Rating Catalog Operating temperature range (°C) -40 to 125 Offset drift (typ) (µV/°C) 1.5 CMRR (typ) (dB) 80 Iout (typ) (A) 0.055 Input common mode headroom (to negative supply) (typ) (V) 0.2 Input common mode headroom (to positive supply) (typ) (V) -0.2 Output swing headroom (to negative supply) (typ) (V) 0.2 Output swing headroom (to positive supply) (typ) (V) -0.2
Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.5 Rail-to-rail In, Out GBW (typ) (MHz) 1 Slew rate (typ) (V/µs) 1.4 Vos (offset voltage at 25°C) (max) (mV) 100 Iq per channel (typ) (mA) 2 Vn at 1 kHz (typ) (nV√Hz) 12 Rating Catalog Operating temperature range (°C) -40 to 125 Offset drift (typ) (µV/°C) 1.5 CMRR (typ) (dB) 80 Iout (typ) (A) 0.055 Input common mode headroom (to negative supply) (typ) (V) 0.2 Input common mode headroom (to positive supply) (typ) (V) -0.2 Output swing headroom (to negative supply) (typ) (V) 0.2 Output swing headroom (to positive supply) (typ) (V) -0.2
SOIC (D) 14 51.9 mm² 8.65 x 6
  • Typical Values, TA = 25°C, V+=5V, V-=0V.
  • Gain Bandwidth 1 MHz
  • Input Voltage Range (G= 0.096 V/V) -15V to +15V
  • Core Op-Amp Input Offset Voltage 100 µV (Max)
  • Supply Current 2 mA (Max)
  • Gain (Attenuation Mode) 0.096 V/V, 0.192 V/V0.384 V/V, 0.768 V/V
  • Gain (Amplification Mode) 1 V/V, 2 V/V
  • Gain Error 0.035% (Max)
  • Core Op-Amp PSRR 90 dB (Min)
  • CMRR 80 dB (min)
  • Adjustable Output Common Mode 1V to 4V
  • Temperature Range −40 to 125°C
  • Package 14-Pin SOIC

All trademarks are the property of their respective owners.

  • Typical Values, TA = 25°C, V+=5V, V-=0V.
  • Gain Bandwidth 1 MHz
  • Input Voltage Range (G= 0.096 V/V) -15V to +15V
  • Core Op-Amp Input Offset Voltage 100 µV (Max)
  • Supply Current 2 mA (Max)
  • Gain (Attenuation Mode) 0.096 V/V, 0.192 V/V0.384 V/V, 0.768 V/V
  • Gain (Amplification Mode) 1 V/V, 2 V/V
  • Gain Error 0.035% (Max)
  • Core Op-Amp PSRR 90 dB (Min)
  • CMRR 80 dB (min)
  • Adjustable Output Common Mode 1V to 4V
  • Temperature Range −40 to 125°C
  • Package 14-Pin SOIC

All trademarks are the property of their respective owners.

The LMP7312 is a digitally programmable variable gain amplifier/attenuator. Its wide input voltage range and superior precision make it a prime choice for applications requiring high accuracy such as data acquisition systems for IO modules in programmable logic control (PLC). The LMP7312 provides a differential output to maximize dynamic range and signal to noise ratio, thereby reducing the overall system error. It can also be configured to handle single ended input data converters by means of the VOCM pin (see for details). The inputs of LMP7312 can be configured in attenuation mode to handle large input signals of up to +/- 15V, as well as in amplification mode to handle current loops of 0-20mA and 4-20mA.The LMP7312 is equipped with a null switch to evaluate the offset of the internal amplifier. A ensured 0.035% maximum gain error (for all gains) and a maximum gain drift of 5ppm over the extended industrial temperature range (-40° to 125°C) make the LMP7312 very attractive for high precision systems even under harsh conditions. A low input offset voltage of 100µV and low voltage noise of 3µVpp give the LMP7312 a superior performance. The LMP7312 is fully specified from -40° to 125°C and is available in SOIC-14 package.

The LMP7312 is a digitally programmable variable gain amplifier/attenuator. Its wide input voltage range and superior precision make it a prime choice for applications requiring high accuracy such as data acquisition systems for IO modules in programmable logic control (PLC). The LMP7312 provides a differential output to maximize dynamic range and signal to noise ratio, thereby reducing the overall system error. It can also be configured to handle single ended input data converters by means of the VOCM pin (see for details). The inputs of LMP7312 can be configured in attenuation mode to handle large input signals of up to +/- 15V, as well as in amplification mode to handle current loops of 0-20mA and 4-20mA.The LMP7312 is equipped with a null switch to evaluate the offset of the internal amplifier. A ensured 0.035% maximum gain error (for all gains) and a maximum gain drift of 5ppm over the extended industrial temperature range (-40° to 125°C) make the LMP7312 very attractive for high precision systems even under harsh conditions. A low input offset voltage of 100µV and low voltage noise of 3µVpp give the LMP7312 a superior performance. The LMP7312 is fully specified from -40° to 125°C and is available in SOIC-14 package.

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技術文件

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類型 標題 日期
* Data sheet Precision SPI-Programmable AFE with Differential/Single-Ended Input/Output datasheet (Rev. B) 2013年 3月 22日
E-book The Signal e-book: A compendium of blog posts on op amp design topics 2017年 3月 28日
EVM User's guide LMP7312 Evaluation Board User Guide 2012年 2月 21日

設計與開發

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開發板

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放大器性能開發套件 (PDK) 是一款評估模組 (EVM) 套件，可測試通用運算放大器 (op amp) 參數，並與大多數運算放大器和比較器相容。EVM 套件提供主板和多個插槽式子卡選項，可滿足封裝需求，使工程師能夠快速評估和驗證裝置性能。

AMP-PDK-EVM 套件支援五種最熱門的業界標準封裝，包括：

  • D (SOIC-8 和 SOIC-14)
  • PW (TSSOP-14)
  • DGK (VSSOP-8)
  • DBV (SOT23-5 和 SOT23-6)
  • DCK (SC70-5 和 SC70-6)
使用指南: PDF | HTML
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ANALOG-ENGINEER-CALC — 類比工程師計算機

The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
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設計工具

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設計工具

CIRCUIT060015 — 可調式參考電壓電路

此電路結合反相及非反相放大器，讓參考電壓可從負輸入電壓向上調整至輸入電壓。可加入增益以提高最大負參考位準。
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設計工具

CIRCUIT060074 — 具有比較器電路的高壓側電流感測

此高壓側電流感測解決方案使用一個具有軌對軌輸入共模範圍的比較器，若負載電流上升到 1 A 以上，便在比較器輸出 (COMP OUT) 建立過電流警示 (OC 警示) 訊號。此實作中的 OC 訊號為低電位作動。因此當超過 1-A 閾值時，比較器輸出會變低。實作磁滯後會在負載電流降低至 0.5 A (減少 50%) 時，讓 OC-Alert 返回邏輯高狀態。此電路利用開漏輸出比較器，為控制數位邏輯輸入針腳而進行電平轉換輸出高邏輯電平。對於需要驅動 MOSFET 開關閘極的應用，建議使用具推挽輸出的比較器。
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模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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使用指南: PDF
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
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