TLV4112IP - Dual High-Output-Drive Rail-to-Rail Op Amp | Texas Instruments
MPN： TLV4112IP ✓ 啟用中TLV4112IP 概覽
An operational amplifier is a differential voltage amplifier that uses feedback to control gain and drive an input signal accurately. The TLV4112 belongs to the voltage-feedback operational-amplifier family, with each channel providing high input impedance, signal amplification, impedance conversion, or closed-loop control. Its rail-to-rail output stage is especially useful when the required output swing must approach the positive or negative supply rail.
Key characteristics include output current above 300 mA at 5 V, a 2.7 MHz unity-gain bandwidth, and a 1.5 V/us slew rate. The device is specified for a 6 V maximum supply voltage and consumes approximately 700 uA per channel. These characteristics distinguish it from general-purpose dual op amps intended mainly for low-current analog signal-conditioning applications.
The high-current output stage allows the TLV4112 to act as a standard operational-amplifier buffer or drive a load directly without a separate output buffer. Its unity-gain bandwidth of 2.7 MHz supports moderate-frequency signal paths, while the 1.5 V/us slew rate helps preserve large-signal response. Because the output can source and sink substantial current, power dissipation and output-stage stability require careful attention at low output voltages or into capacitive loads.
Typical uses include headphone and line-output buffers, relay and solenoid drivers, low-voltage motor drivers, signal-conditioning stages, and general dual-amplifier modules. The shutdown feature mentioned for other members of the TLV411x family is not attributed to the TLV4112, so control logic should not assume that a shutdown input is available on this exact device.
For PCB design, place input and output decoupling capacitors close to the appropriate supply pins, provide a low-impedance return path, and verify stability with the intended load. Keep copper away from sensitive input nodes when the output is driving substantial current, and verify that the power-supply topology can accommodate the required output-current transients.
This page combines manufacturer specifications, application-oriented guidance, pin-package information, and a structured comparison with closely related amplifier options. It is intended to help engineers evaluate output drive, bandwidth, supply range, package compatibility, and board-level implementation requirements before selecting a device.
直接替換替代品，適用於 TLV4112IP — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
TLV4111IP
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TLV4112IP 最大額定值與電氣特性
| Amplifier Type | General-purpose operational amplifier |
| Number of Channels | 2 channels |
| Output Topology | Rail-to-rail output |
| Output Current | Greater than 300 mA at 5 V |
| Unity-Gain Bandwidth | 2.7 MHz |
| Slew Rate | 1.5 V/us |
| 供應電流 | 700 uA per channel |
| Minimum Supply Voltage | 2.7 V |
| Maximum Supply Voltage | 6 V |
| 封裝 | 8-pin PDIP |
| 安裝類型 | Through-hole |
| Product Function | High-output-drive operational amplifier |
| Primary Applications | High-current buffer and coil-driver applications |
TLV4112IP 8-pin pdip 腳位配置指南
TLV4112IP（8-pin pdip 封裝）的腳位配置。 此類比元件具有輸入、輸出與電源腳位。偏移歸零、補償與致能腳位配置請參閱製造商資料表。適用於訊號調理與放大器電路。
無詳細腳位定義資料： TLV4112IP.
請參閱 資料表 以查看完整腳位配置。
典型應用
TLV4112IP 適用於 6 應用s: Headphone and Line-Output Buffering, Low-Voltage Relay and Solenoid Drive, Precision Signal-Conditioning Stage, Portable Low-Voltage Analog Front End, Low-Voltage Motor Driver Interface, Test and Measurement Output Buffer.
Headphone and Line-Output Buffering
The TLV4112IP fits headphone or line-output buffering when the load requires more current than a conventional dual op amp can provide. Its rail-to-rail output stage can source and sink more than 300 mA at 5 V, while the 2.7 MHz unity-gain bandwidth accommodates moderate-bandwidth audio and control signals. Use the amplifier in a voltage-follower or compatible feedback topology and place output decoupling close to the device. Confirm that the selected load, output swing, and sustained current do not create unacceptable internal power dissipation.
Low-Voltage Relay and Solenoid Drive
The TLV4112IP is suitable for driving a low-voltage relay or solenoid when the coil current is compatible with its greater-than-300 mA output-drive capability at 5 V. The 1.5 V/us slew rate provides useful large-signal responsiveness, while 2.7 MHz unity-gain bandwidth is sufficient for many ordinary coil-control loops. Use a flyback diode to suppress inductive voltage spikes and verify the transistor or diode strategy used for current direction. The coil supply and ground return must accommodate the load without disturbing sensitive analog circuitry.
Precision Signal-Conditioning Stage
The TLV4112IP can perform moderate-bandwidth signal conditioning while retaining the option to drive a heavier downstream load. Its 2.7 MHz unity-gain bandwidth is suitable for audio-frequency, control, and general analog signals, and the rail-to-rail output improves headroom at low supply voltages. Feedback components determine closed-loop gain and bandwidth, so calculate them against the selected topology rather than treating the 2.7 MHz figure as a guaranteed operating bandwidth at every gain.
Portable Low-Voltage Analog Front End
The 2.7 V minimum supply of the TLV4112IP supports battery-powered and portable analog systems operating from a low-voltage rail. Approximately 700 uA per channel is suitable for many signal-conditioning uses, while the high-output-drive stage adds flexibility when a controlled output must drive more current than the preceding sensor or detector can source. Check input common-mode range, output swing, and quiescent-current contribution in the final power budget. High-current operation can raise total supply demand even when each amplifier channel is otherwise lightly loaded.
Low-Voltage Motor Driver Interface
The TLV4112IP can serve as the high-current interface between a control signal and a small low-voltage motor or actuator stage. The greater-than-300 mA output capability at 5 V and 1.5 V/us slew rate are useful when the amplifier directly drives a transistor gate or actuator winding. Confirm whether the motor requires bidirectional drive, because a dual operational amplifier does not itself provide H-bridge control. Add suitable transistor drive circuitry, account for inductive transients, and keep motor-current returns away from sensitive amplifier ground paths.
Test and Measurement Output Buffer
The TLV4112IP is useful in test and measurement modules that must buffer a low-level control or analog signal into a more capable output stage. Its 2.7 MHz unity-gain bandwidth handles moderate-frequency signals, while the high-current output reduces the need for an additional discrete buffer in suitable loads. Place the channel in a feedback configuration selected for stability and verify capacitive loading. For instrumentation requiring very low offset, very low noise, or precise settling, compare those input specifications before using this high-drive device.
工程參考資料，適用於 TLV4112IP — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TLV4111IP |
|---|---|---|
| Brand | Texas Instruments | Texas Instruments |
| Package | 8-pin PDIP | 8-pin PDIP |
| Number of Channels | 2 channels | 2 channels |
主要差異化特點
- High output-current capability (對比TLV4111IP)
- Moderate-frequency performance (對比TLV4111IP)
- Low-voltage dual-channel implementation (對比TLV4111IP)
設計說明
Estimated: power dissipation is P = (VIN - VOUT) x IOUT plus internal quiescent and output-stage losses. At a 5 V supply, 1.5 V output, and 300 mA continuous load, the voltage-drop loss alone is approximately 1.05 W. The 8-pin PDIP increases thermal resistance compared with exposed-pad packages, so verify the package dissipation rating, copper area, ambient temperature, and maximum continuous-load duration before using the full output-current capability.
Place supply-bypass capacitors close to the IC supply and ground pins, with a short and low-impedance return path for output-current transients. Keep high-current output routing physically separate from sensitive input and reference traces to reduce ground bounce and coupling. Because this device is intended for loads above the drive range of many op amps, verify the complete return-current path and consider a dedicated ground plane region where the load permits it.
Do not interpret rail-to-rail output as a guarantee of zero output-voltage error at the supply rails; real output swing depends on load current, output-stage topology, and supply voltage. Likewise, the 2.7 MHz unity-gain bandwidth is not the closed-loop bandwidth at every gain. Check the actual feedback network, output loading, and gain, and use the family datasheet for input common-mode limits, output swing, stability, and absolute-maximum ratings.
For capacitive or inductive loads, test stability and ringing on the assembled PCB rather than relying only on unity-gain simulations. Keep feedback-loop routing short and connect the feedback network close to the amplifier pins. When driving a coil, place the flyback protection diode close to the coil so switching transients do not spread through the board, while maintaining separate current and signal-current returns where practical.
合規資訊
No specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statement was identified for the exact TLV4112IP ordering suffix.