OPA333AIDBVR - 1.8V 17uA Zero-Drift Op Amp | TI
MPN： OPA333AIDBVR ✓ 啟用中OPA333AIDBVR 概覽
An operational amplifier is a voltage-gain element used in amplifier, comparator, buffer, integrator, and sensor-conditioning circuits. The OPAx333 family belongs to the precision amplifier hierarchy, using CMOS construction and proprietary auto-calibration to combine low offset with near-zero drift. Its rail-to-rail input and output characteristics help preserve usable signal range in low-voltage systems, while the 17 uA supply current supports battery-powered and portable equipment.
The OPA333AIDBVR combines a 10 uV maximum offset voltage, near-zero drift, rail-to-rail operation, and low quiescent current in one compact five-pin package. According to the Texas Instruments product page, the common-mode input range reaches 100 mV beyond the rails, and the output swings rail-to-rail. These features make the amplifier useful when the measured signal is small, the supply voltage is limited, and system power budget is important.
The zero-drift architecture periodically corrects the amplifier's offset through auto-calibration. This improves long-term stability compared with a conventional amplifier whose offset changes with temperature and aging, although calibration behavior and noise should still be considered in the complete signal chain. The CMOS process and low-power design also make the part suitable for precision instrumentation, sensor interfaces, and low-voltage analog systems.
Typical applications include battery-powered sensor conditioning, portable measurement equipment, low-current analog interfaces, precision current sensing, and general low-voltage signal amplification. OPA333AIDBVR is particularly appropriate when the application requires low offset, low supply current, and operation from a 1.8 V class supply. The amplifier's compact SOT-23-5 footprint simplifies board-level integration in space-constrained designs.
Designers should verify the complete supply range, input common-mode limits, output swing, noise, settling behavior, and calibration requirements against the manufacturer datasheet. Decoupling capacitors should be placed close to the supply pins, and sensitive analog signals should be routed away from switching nodes and high-current paths. This page combines verified manufacturer and distributor information with practical engineering guidance for selecting and integrating the device.
This OPA333AIDBVR data sheet is available through Texas Instruments' product page and authorized distributor listings, while alternative selection and package compatibility should be checked against the specific design requirements.
直接替換替代品，適用於 OPA333AIDBVR — 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。
此系列的變體
與下列產品可直接替換的同系列型號： OPA333AIDBVR （相同外形與佔位） — 差異在於 Input Type, Operating Temperature, Package.
OPA333AIDBVT
✅ 直接替換📋 參考替代品（不在目錄中）
OPA333AIDBVTG4
✅ 直接替換📋 參考替代品（不在目錄中）
OPA333AIDB
✅ 直接替換📋 參考替代品（不在目錄中）
OPA333AID
✅ 直接替換📋 參考替代品（不在目錄中）
OPA333AMDBVREP
✅ 直接替換📋 參考替代品（不在目錄中）
OPA333AIDBVR 最大額定值與電氣特性
| Product Type | Single-channel zero-drift CMOS operational amplifier |
| 供應電壓 | 1.8 V minimum |
| 靜態電流 | 17 uA |
| Maximum Input Offset Voltage | 10 uV |
| Input Drift | Near-zero drift |
| Input Common-Mode Range | 100 mV beyond the supply rails |
| Output Swing | Rail-to-rail |
| Input Type | High impedance |
| Technology | Proprietary auto-calibration, CMOS |
| Number of Channels | 1 |
| 封裝 | SOT-23-5 |
| 安裝類型 | Surface mount |
| 工作溫度 | -40C to +125C |
| Supplier Category | Zero-drift amplifier |
| Packaging Format | Tape and reel |
OPA333AIDBVR sot-23-5 腳位配置指南
OPA333AIDBVR（sot-23-5 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： OPA333AIDBVR.
請參閱 資料表 以查看完整腳位配置。
典型應用
OPA333AIDBVR 適用於 7 應用s: Battery-Powered Sensor Conditioning, Portable Precision Measurement, Low-Voltage Current Sensing, Precision Buffering, Low-Power Data Acquisition, Portable Medical or Environmental Monitoring, Low-Voltage Signal Conditioning.
Battery-Powered Sensor Conditioning
OPA333AIDBVR fits low-power sensor interfaces because it operates from a 1.8 V minimum supply and consumes 17 uA quiescent current. Its maximum input offset voltage of 10 uV helps preserve small sensor signals, while the high-impedance inputs reduce loading on suitable resistive sensors. Place the amplifier close to the sensor and bypass the supply pins to reduce noise pickup. The design must still verify sensor impedance, signal bandwidth, and the amplifier's complete electrical limits.
推薦
Portable Precision Measurement
OPA333AIDBVR is suitable for portable meters and precision measurement front ends where DC offset can limit accuracy. Its 10 uV maximum input offset and near-zero drift reduce sensitivity to temperature and time compared with a conventional amplifier, while the 17 uA supply current supports long battery operation. Use it in non-inverting, differential, or buffer configurations after checking common-mode range and output swing. The auto-calibration architecture should be included in the system-level noise and settling analysis.
推薦
Low-Voltage Current Sensing
OPA333AIDBVR can amplify the small voltage generated by a low-side or appropriately biased current-sense element when the common-mode and output ranges meet the circuit requirements. Its 10 uV maximum input offset helps preserve accuracy near zero current, and the 17 uA quiescent current limits the amplifier's contribution to a battery-powered budget. The sense resistor, filtering, Kelvin routing, and amplifier settling must be evaluated together; the zero-drift behavior does not eliminate all noise or layout errors.
推薦
Precision Buffering
OPA333AIDBVR is appropriate for voltage buffering when the source has relatively high impedance and the load must be driven from a low-power rail. Rail-to-rail output helps retain output range, and the high-impedance input stage minimizes loading. However, buffer stability, capacitive loading, noise, and settling should be checked for the exact source impedance and bandwidth. Decoupling should be placed close to the supply pins, and the output should be kept within the datasheet-defined swing limits.
推薦
Low-Power Data Acquisition
OPA333AIDBVR is useful in compact data-acquisition systems that need accurate amplification of slow or near-DC signals from resistive bridges, strain gauges, or other sensors. The 1.8 V-class supply and 17 uA quiescent current support reduced-power designs, while the 10 uV maximum offset and near-zero drift improve long-term measurement stability. Check amplifier noise density, input bias behavior, common-mode voltage, and filter bandwidth before selecting the gain and sampling rate.
推薦
Portable Medical or Environmental Monitoring
OPA333AIDBVR can support low-level analog signal conditioning in portable monitoring products where battery consumption and measurement stability are important. Its rail-to-rail input/output behavior is useful when the signal remains close to the available supply range, and the 10 uV maximum offset helps reduce baseline error. For medical or environmental applications, validate noise, isolation, calibration, safety requirements, and regulatory constraints separately; the supplied data does not establish medical or automotive qualification.
推薦
Low-Voltage Signal Conditioning
OPA333AIDBVR is appropriate for general low-voltage signal conditioning when the circuit needs low offset, low drift, and low quiescent current without requiring a large package. It can serve as a precision gain stage before an ADC or as a low-power buffer for a sensor reference. Maintain the input common-mode voltage within the specified range, ensure the output does not exceed the rail-to-rail limits, and account for auto-calibration timing when the system samples data immediately after power-up.
推薦
推薦產品摘要
工程參考資料，適用於 OPA333AIDBVR — 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 | OPA333AIDBVT | OPA333AIDBVTG4 | OPA333AIDB | OPA333AID | OPA333AMDBVREP |
|---|---|---|---|---|---|---|
| Package | SOT-23-5 | SOT-23-5 | SOT-23-5 | SOT-23-5 | SOT-23-5 | SOT-23-5 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Type | Zero-drift CMOS operational amplifier | Zero-drift CMOS operational amplifier | Zero-drift CMOS operational amplifier | Zero-drift CMOS operational amplifier | Zero-drift CMOS operational amplifier | Zero-drift CMOS operational amplifier |
| Minimum Supply Voltage | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V | 1.8 V |
| Quiescent Current | 17 uA | 17 uA | 17 uA | 17 uA | 17 uA | 17 uA |
主要差異化特點
- Low offset and near-zero drift in a compact precision amplifier (對比OPA333AIDBVT)
- Low-power operation for portable analog systems (對比OPA333AIDBVTG4)
- Rail-to-rail signal-range support (對比OPA333AIDB)
設計說明
Place the supply-decoupling capacitor as close as practical to the OPA333AIDBVR supply and ground pins. Because the verified device specification is only 17 uA quiescent current, capacitor selection and leakage should still be checked against the required startup behavior, sensor impedance, and analog noise target. Confirm the exact minimum and maximum supply ratings from the manufacturer datasheet before applying the amplifier outside a 1.8 V-class rail.
Route the high-impedance input node as a short, guarded trace and keep it away from switching regulators, digital clocks, inductors, and high-current return paths. For sensor interfaces, use a quiet ground reference and consider a driven or shielded guard where leakage and board contamination matter. The small SOT-23-5 footprint helps placement, but the pin configuration must be taken from the manufacturer drawing rather than inferred from the package name.
Verify common-mode voltage, output swing, noise, bandwidth, and settling for the actual gain configuration before closing the signal path. OPA333AIDBVR's 10 uV maximum offset and near-zero drift are advantageous for near-DC measurements, but they do not remove errors caused by resistor tolerance, source impedance, ADC noise, or inadequate filtering. Account for startup and auto-calibration timing if the system samples immediately after power-up.
合規資訊
The supplied manufacturer and distributor data does not explicitly provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for the exact OPA333AIDBVR orderable MPN.
