OPA1612AIDR - 1.1nV/√Hz Dual Audio Op Amp | Texas Instruments
料号： OPA1612AIDR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.7911 | $0.79 |
| 10 | $0.7911 | $7.91 |
| 100 | $0.7911 | $79.11 |
| 500 | $0.7911 | $395.55 |
| 1,000 | $0.7911 | $791.10 |
OPA1612AIDR 概述
What is a bipolar-input operational amplifier? A bipolar-input operational amplifier uses bipolar transistor input devices to provide low-voltage noise and precise analog signal handling. In the broader hierarchy, an operational amplifier is an analog IC, an amplifier IC, and part of a signal-conditioning or active-filter system. Audio applications require low noise, low total harmonic distortion, adequate output drive, and predictable behavior with capacitive and feedback networks.
The verified data identifies the OPA1612 as a high-performance audio amplifier with 1.1 nV/√Hz noise density. The manufacturer datasheet states rail-to-rail output swing to within 600 mV with a 2 kΩ load and output drive capability of ±30 mA. Those figures help preserve dynamic range and allow the amplifier to drive downstream audio stages more effectively than a low-current precision op amp. The OPA1612AIDR is identified as an 8-SOIC, dual-circuit device.
The bipolar input architecture is intended for low-noise audio signal conditioning rather than general-purpose low-power sensing. Its distortion specification of 0.000015% at 1 kHz is particularly relevant for headphone buffers, mixing-console stages, active crossovers, and studio signal paths. The rail-to-rail output characteristic improves usable swing near the supply limits, although input and output common-mode behavior must still be checked against the system rails.
Typical applications include stereo line-input amplification, headphone-driver buffering, active low-pass and high-pass filters, microphone preamplifier stages, audio ADC drivers, and balanced audio signal-chain interfaces. The dual-channel configuration reduces the number of amplifiers required in a stereo design while keeping the two channels in one standard 8-SOIC footprint.
The principal design consideration is to preserve low-noise performance with suitable bypassing, stable feedback compensation, and careful grounding. Keep input and feedback traces short, place decoupling capacitors close to the supply pins, and account for the amplifier’s ±30 mA output-drive capability when selecting the next stage. For a direct PCB substitution, confirm the exact package, pinout, supply range, and electrical limits against the replacement datasheet.
直接替换替代料： OPA1612AIDR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： OPA1612AIDR （相同外形与封装尺寸） ——差异在于 Distortion, Number of Channels, Package, RoHS Status.
快速对比工具——选择替代料号进行并排对比：
OPA1612AIDRGT
✅ 直接替换📋 参考替代料（不在目录中）
OPA1612AIDRGR
✅ 直接替换📋 参考替代料（不在目录中）
OPA1612AID
✅ 直接替换📋 参考替代料（不在目录中）
OPA1612A
✅ 直接替换📋 参考替代料（不在目录中）
OPA1612AIDRGT
✅ 直接替换📋 参考替代料（不在目录中）
TPA6120A2DWPG4
✅ 直接替换📋 参考替代料（不在目录中）
OPA1612AIDR 最大额定值与电气特性
| Number of Channels | 2 |
| Input Type | Bipolar input |
| 噪声密度 | 1.1 nV/√Hz |
| Distortion | 0.000015% at 1 kHz |
| Output Swing | Rail-to-rail to within 600 mV with a 2 kΩ load |
| Output Drive Capability | ±30 mA |
| 封装 | 8-pin SOIC |
| Circuit Type | Dual operational amplifier |
| Application | Professional audio and sound applications |
| 工作温度 | -40 °C to +85 °C |
| 安装类型 | Surface mount |
| MSL | MSL Level 2, 260 °C, 1 year |
| RoHS 状态 | RoHS3 compliant |
| REACH Status | REACH compliant |
OPA1612AIDR 8-pin soic 引脚配置指南
OPA1612AIDR（8-pin soic 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： OPA1612AIDR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
OPA1612AIDR 适用于 6 应用s: Professional Audio Line Buffer, Headphone Output Driver, Active Audio Crossover, Microphone Preamplifier, Audio ADC Input Driver, Balanced Audio Interface.
Professional Audio Line Buffer
OPA1612AIDR fits a stereo line-buffer stage because it combines a 1.1 nV/√Hz noise density with very low 0.000015% distortion at 1 kHz. Place one channel ahead of each line input and use the dual SOIC to reduce external amplification stages. The manufacturer-verified ±30 mA output drive provides useful margin for downstream audio circuitry, while rail-to-rail output swing to within 600 mV into a 2 kΩ load helps preserve signal range. The exact supply limits must be confirmed from the complete datasheet.
推荐
Headphone Output Driver
OPA1612AIDR is suitable for a headphone-buffer or line-driver experiment when the load is within the device’s verified drive capability. Its ±30 mA output current and rail-to-rail output swing can increase usable headroom compared with a low-current amplifier, while the 1.1 nV/√Hz noise density helps preserve quiet signal paths. It is not a substitute for a dedicated power headphone amplifier without checking load current, voltage swing, thermal behavior, and stability.
推荐
Active Audio Crossover
Use OPA1612AIDR in an active low-pass or high-pass audio crossover where low noise and low distortion matter in the passband. Its 1.1 nV/√Hz noise density reduces the amplifier’s contribution to quiet listening levels, while the 0.000015% distortion figure at 1 kHz helps preserve waveform fidelity around the crossover region. The dual package can implement two channels, but resistor and capacitor values must be calculated from the desired poles and checked against the complete datasheet.
推荐
Microphone Preamplifier
OPA1612AIDR can serve as a low-noise stage around microphone or line-level audio sources when the circuit operates within the verified supply and common-mode limits. The bipolar-input architecture and 1.1 nV/√Hz noise density are aligned with low-level signal conditioning, while the dual package allows two microphone channels to share one device. Proper input biasing, gain-setting resistors, grounding, and feedback compensation are essential; the supplied data does not provide offset or bias-current values.
推荐
Audio ADC Input Driver
OPA1612AIDR is appropriate for driving an audio-conversion front end when the downstream ADC requires low distortion and a low-noise analog source. The amplifier’s 0.000015% distortion at 1 kHz supports high-fidelity signal transfer, and its rail-to-rail output swing can provide useful range when supply limits permit. Place the amplifier close to the ADC input, use short traces, and verify the ADC’s input bandwidth, settling requirements, and recommended driver topology before finalizing the design.
推荐
Balanced Audio Interface
OPA1612AIDR can support balanced audio signal conditioning in studio, instrument, or communications equipment where low-noise amplification is required on each polarity. Its dual-channel architecture simplifies paired positive and negative signal paths, and the 1.1 nV/√Hz noise density helps limit added circuit noise. The output swing and ±30 mA drive capability are useful for downstream line drivers, but common-mode range, supply voltage, stability, and channel-to-channel matching must be verified before production use.
推荐
推荐产品汇总
工程参考数据： OPA1612AIDR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | OPA1612AIDRGT | OPA1612AIDRGR | OPA1612AID | OPA1612A | TPA6120A2DWPG4 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
关键差异点
- Very low verified noise density （对比 OPA1612AID)
- Audio-focused distortion specification （对比 OPA1612AIDRGT)
- Dual-channel implementation （对比 TPA6120A2DWPG4)
设计说明
Place the supply-bypass capacitors close to the OPA1612AIDR supply pins and keep the input, feedback, and output traces short. The verified 1.1 nV/√Hz noise density describes the device, not the complete PCB; long traces, shared return paths, and inductively coupled switching nodes can dominate the system noise floor. Follow the recommended application layout in the Texas Instruments datasheet.
Use the manufacturer’s recommended feedback network and verify stability with the intended load and cable capacitance. The verified specification of ±30 mA output drive does not establish capacitive-load tolerance or bandwidth. In particular, do not assume that a high-current output stage is automatically stable with every audio cable, headphone transducer, or ADC input; confirm these conditions experimentally and from the datasheet.
Keep analog and digital return currents separated as far as the board architecture allows, and use a quiet ground reference for the audio path. The rail-to-rail output swing to within 600 mV with a 2 kΩ load is useful, but the available headroom depends on the actual supply voltage and load. Confirm supply limits and output-current limits before using the part as a line or headphone driver.
合规信息
The supplied cross-reference result identifies OPA1612AIDR as RoHS3 compliant, REACH compliant, and MSL Level 2 at 260 °C for one year. AEC-Q100 status, lead-free status, halogen-free status, and conflict-minerals status are not established by the supplied data.