OPA2375 - Dual 10MHz Low-Noise CMOS Op Amp | Texas Instruments
料号： OPA2375 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.85 | $0.85 |
| 10 | $0.76 | $7.60 |
| 100 | $0.6 | $60.00 |
| 500 | $0.51 | $255.00 |
| 1,000 | $0.43 | $430.00 |
OPA2375 概述
An operational amplifier is a high-gain voltage amplifier with differential inputs, foundational to the analog signal-chain hierarchy: op amp -> amplifier IC -> analog front end -> semiconductor. The OPA2375 belongs to the OPAx375 family, which includes the single-channel OPA375 and quad-channel OPA4375, all sharing the same core CMOS silicon and specifications.
Key features include low broadband noise (3.5 nV/rtHz family figure, 4.6 nV/rtHz for the dual at specified conditions), a wide 10 MHz bandwidth suited to active filters and transimpedance stages, rail-to-rail output swing that maximizes dynamic range on 3.3V and 5V rails, and low offset of 500 uV maximum that reduces DC error without needing auto-zero calibration. CMOS construction gives low input bias current, important for high-impedance sources.
Architecturally, the OPA2375 uses a CMOS input pair with a precision trim at wafer test, achieving a strong noise-bandwidth-offset balance that makes the OPAx375 family attractive for precision applications requiring good AC performance at low cost. Unity-gain stability and rail-to-rail output simplify buffer and driver designs.
Typical applications include sensor signal conditioning, active anti-aliasing filters ahead of precision ADCs, transimpedance amplifiers for photodiodes, and medical or portable instrumentation where low noise and wide bandwidth on a single 5V rail are required. The dual channel halves board area versus two singles.
Design consideration: keep source impedance below approximately 1 kOhm to preserve the nV-level noise floor, and decouple each supply pin with 0.1 uF ceramics placed close to the device.
直接替换替代料： OPA2375 ——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： OPA2375 （相同外形与封装尺寸） ——差异在于 Package, RoHS Status, Input Offset Voltage (Max), Input Voltage Noise, Operating Temperature Range.
快速对比工具——选择替代料号进行并排对比：
OPA2375IPWR
✅ 直接替换✓ 有现货
$0.62 / 个
查看数据手册 →OPA2192IDR
⚡ 相同封装✓ 有现货
$0.82 / 个
查看数据手册 →OPA2172
⚡ 相同封装✓ 有现货
$0.92 / 个
查看数据手册 →OPA2325ID
⚡ 相同封装📋 参考替代料（不在目录中）
OPA2375 最大额定值与电气特性
| 通道数 | 2 (Dual) |
| Supply Voltage Range | 2.2 V to 5.5 V |
| Gain Bandwidth Product | 10 MHz |
| Input Noise Density | 4.6 nV/rtHz |
| Family Noise Figure | 3.5 nV/rtHz |
| Input Offset Voltage (Max) | 500 uV |
| 输出类型 | Rail-to-Rail Output (RRO) |
| Amplifier Type | CMOS, General Purpose |
| 封装 | 8-TSSOP |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Family | OPAx375 (OPA375 / OPA2375 / OPA4375) |
OPA2375 引脚配置
| 引脚 1 | OUT A — Channel A output (RRO) |
| 引脚 2 | -IN A — Channel A inverting input |
| 引脚 3 | +IN A — Channel A non-inverting input |
| 引脚 4 | V- — Negative supply / ground |
| 引脚 5 | +IN B — Channel B non-inverting input |
| 引脚 6 | -IN B — Channel B inverting input |
| 引脚 7 | OUT B — Channel B output (RRO) |
| 引脚 8 | V+ — Positive supply, 2.2 V to 5.5 V |
典型应用
OPA2375 适用于 6 应用s: Sensor Signal Conditioning, Active Anti-Aliasing Filters, Photodiode Transimpedance Amplifier, Portable and Battery-Powered Medical Instrumentation, Industrial Analog Front Ends, Audio and Signal-Chain Buffering.
Sensor Signal Conditioning
The OPA2375's 500 uV maximum offset and 4.6 nV/rtHz noise preserve small sensor signals such as bridge and thermocouple outputs without DC-trim circuits. Its 10 MHz bandwidth supports fast-settling gain stages ahead of ADCs. Configured as a non-inverting amplifier with gain of 10 to 100, the dual channels handle signal and reference buffering in one 8-TSSOP footprint, halving board area versus two single-channel parts on 3.3V or 5V rails.
推荐
Active Anti-Aliasing Filters
A 10 MHz gain-bandwidth product gives the OPA2375 ample loop gain for 2nd-order Sallen-Key or multiple-feedback low-pass filters with cutoffs up to several hundred kHz ahead of precision ADCs such as the ADS131M08. Rail-to-rail output maximizes filter swing on a single 5V rail, and 4.6 nV/rtHz input noise keeps the filter's noise contribution well below the ADC quantization floor, preserving total system SNR in data-acquisition chains.
推荐
Photodiode Transimpedance Amplifier
CMOS input structure gives the OPA2375 very low input bias current, minimizing error with high-impedance photodiodes. The 10 MHz bandwidth supports TIA feedback resistor values in the hundreds of kilo-ohms with megahertz-class closed-loop response. A feedback capacitor sized per the datasheet stability equation compensates diode capacitance; the RRO allows full dynamic range from a 5V supply in optical sensing and barcode-scanning front ends.
推荐
Portable and Battery-Powered Medical Instrumentation
Operation from 2.2V to 5.5V lets the OPA2375 run directly from a single lithium cell or 3.3V rail, while 4.6 nV/rtHz noise supports low-level biopotential and physiological sensor front ends. The dual channel integrates signal gain and buffering in one package, cutting BOM count for wearables and portable diagnostics. Rail-to-rail output preserves headroom, maximizing usable signal range on the low supply - a key factor in battery-operated medical devices.
推荐
Industrial Analog Front Ends
In factory automation and process-control I/O modules, the OPA2375 amplifies and filters signals from industrial sensors before conversion. Its 10 MHz bandwidth supports fast control-loop sampling, and the 500 uV max offset keeps DC accuracy acceptable without calibration across 0-70C or wider industrial boards. The TSSOP-8 package suits dense multi-channel PLC analog cards where per-channel board area and cost both matter.
推荐
Audio and Signal-Chain Buffering
With 4.6 nV/rtHz noise and 10 MHz bandwidth, the OPA2375 buffers DAC outputs and drives line-level audio stages with low added noise and excellent THD headroom. Rail-to-rail output swing on a single 5V rail suits USB-powered audio dongles and mixed-signal boards where negative rails are unavailable. One TSSOP-8 provides two channels - input buffer plus output driver - simplifying layout around audio codec and DAC companion devices.
推荐
推荐产品汇总
工程参考数据： OPA2375 ——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 | OPA2375IPWR | OPA2192IDR | AD8606ARZ | OPA2172 |
|---|---|---|---|---|---|
| Package | 8-TSSOP | 8-TSSOP - same | SOIC-8 (TSSOP variants available) | SOIC-8 | SOIC-8 / TSSOP-8 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices | Texas Instruments |
| Channels | 2 (Dual) | 2 (Dual) | 2 (Dual) | 2 (Dual) | 2 (Dual) |
| Output | Rail-to-Rail Output | RRO | RRO | Rail-to-Rail | RRO |
关键差异点
- Low broadband noise for precision front ends （对比 OPA2172)
- Wider bandwidth than TI precision alternate （对比 OPA2192IDR)
- Cross-brand dual CMOS RRO equivalent with drop-in footprint （对比 AD8606ARZ)
设计说明
Place a 0.1 uF ceramic decoupling capacitor at each supply pin (V+ pin 8) with a ground via within 2 mm of pin 4. Add a 2.2 uF to 10 uF bulk capacitor per board. Keep feedback traces short and direct; route high-impedance input traces away from switching nodes to prevent coupling the amplifier's nV-level noise floor from being dominated by layout-induced pickup. Refer to TI OPAx375 datasheet layout guidelines.
Source impedance directly adds Johnson noise: a 10 kOhm resistor contributes about 12.8 nV/rtHz, nearly 3x the OPA2375's 4.6 nV/rtHz input noise. Keep series resistance under 1 kOhm in noise-critical paths, or account for resistor noise in the error budget. For transimpedance stages, compute the feedback capacitor from diode capacitance and 10 MHz GBW to ensure 45 degrees or more phase margin.
Do not exceed the 5.5 V absolute maximum supply. The rail-to-rail OUTPUT (RRO) architecture means inputs do not swing to the rails - keep input common-mode within the datasheet range or clipping/distortion will occur. When substituting AD8606 or OPA2172, verify the same footprint AND offset/bandwidth against your error budget before release to production.
合规信息
RoHS compliant per TI product page. REACH/halogen/conflict-minerals status not stated in provided data.
