TS934IN - Dual Micropower RRO Op Amp | STMicroelectronics
MPN： TS934IN ✗ 停產TS934IN 概覽
An operational amplifier is an active analog integrated circuit that uses high open-loop gain to amplify small voltage differences. The TS934IN belongs to the operational-amplifier hierarchy of analog ICs, with rail-to-rail output swing and CMOS input characteristics. Its micropower operating current makes it suitable for battery-powered equipment, portable instruments, sensor interfaces, and low-power control systems where every microamp of supply demand affects battery life.
The TS934 family provides rail-to-rail output swing, single-supply operation, CMOS inputs, ultra-low input bias current, and ESD protection. The TS934IN is identified as a general-purpose, two-circuit amplifier in a 14-DIP package. The 100 kHz gain-bandwidth product is appropriate for low-frequency buffering, amplification, filtering, and thresholding rather than high-speed signal processing. Its CMOS input stage is particularly useful when measuring high-impedance sources because input bias current is minimized.
The TS934IN can operate from 2.7 V supplies, helping designers reduce the power requirements of portable systems. The manufacturer describes a 2.9 Vpp output swing with a 100 kΩ load when supplied from 2.7 V. This specification should be considered when the signal must approach the supply rails, especially for low-voltage sensor signals where headroom is limited.
Typical uses include battery-powered sensor conditioning, portable measurement equipment, audio and control interfaces, low-frequency active filters, and general-purpose dual-amplifier signal paths. Because the device is a dual amplifier, both channels can be used in a single circuit when the application does not require independent supply sequencing.
A key design consideration is to verify input common-mode range, output swing, stability, and load behavior against the manufacturer datasheet before using the amplifier near the supply limits. Decoupling capacitors should be placed close to the supply pins, and the unused channel inputs should be configured according to the recommended application circuit. This page combines the TS934IN technical identity with application guidance, comparison criteria, and practical design notes for engineers.
直接替換替代品，適用於 TS934IN — 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： TS934IN （相同外形與佔位） — 差異在於 Amplifier Type, ESD Protection, Gain-Bandwidth Product, Input Bias Current, Mounting Type.
TS934CN
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TS934ID
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →TS934BN
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
TS934IN 最大額定值與電氣特性
| Amplifier Type | Dual operational amplifier |
| 拓撲 | Rail-to-rail output |
| Input Type | CMOS input |
| Supply Voltage Minimum | 2.7 V |
| Supply Voltage Maximum | 10 V |
| 供應電流 | 20 µA |
| Gain-Bandwidth Product | 100 kHz |
| Output Swing | 2.9 Vpp with RL = 100 kΩ at 2.7 V supply |
| Input Bias Current | 1 pA |
| Number of Circuits | 2 |
| 封裝 | 14-DIP |
| 安裝類型 | Through-hole |
| ESD Protection | Yes |
| Single-Supply Operation | Yes |
| Output Rail-to-Rail | Yes |
TS934IN 14-dip 腳位配置指南
TS934IN（14-dip 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： TS934IN.
請參閱 資料表 以查看完整腳位配置。
典型應用
TS934IN 適用於 6 應用s: Battery-Powered Sensor Conditioning, Portable Measurement Instrumentation, Low-Frequency Active Filtering, Audio Interface Amplification, Industrial Threshold Detection, Low-Power Control and Interface Circuits.
Battery-Powered Sensor Conditioning
The TS934IN fits low-energy sensor front ends where the amplifier must draw only about 20 µA and present very little DC load to the sensor. Its CMOS input bias current can be as low as 1 pA, which helps preserve the accuracy of high-impedance probes, thermistors, and chemical or environmental sensors. The 2.7 V to 10 V supply range supports compact battery-powered systems. Place the amplifier close to the sensor, bypass the supply pins, and verify input common-mode limits and output swing at the lowest operating voltage.
推薦
Portable Measurement Instrumentation
TS934IN is appropriate for handheld meters and portable measurement instruments that combine two low-frequency analog channels. The dual configuration can provide signal gain and output buffering in one 14-DIP device, reducing board area compared with two separate amplifiers. A 20 µA supply current supports battery operation, while the 100 kHz gain-bandwidth product covers slow sensor and control signals. Designers should calculate loop gain from the selected feedback network and avoid operating the output too close to the rail when low-voltage accuracy is required.
推薦
Low-Frequency Active Filtering
The TS934IN can implement active filters and low-frequency signal shapers in portable or low-voltage equipment. Its 100 kHz gain-bandwidth product provides useful bandwidth for filters processing sensor, audio, or control-band signals, while the rail-to-rail output helps use a restricted 2.7 V supply range. Component tolerances and the amplifier's finite gain-bandwidth product can alter filter poles and damping, so simulate the complete circuit and test stability with the intended load. Decoupling and clean grounding are essential at low supply voltages.
推薦
Audio Interface Amplification
TS934IN is suitable for low-level audio input amplification and buffering where low bias current and low supply consumption are important. The CMOS input stage minimizes disturbance to high-impedance audio sources, and the dual-amplifier configuration can handle left and right channels in a compact circuit. The 100 kHz bandwidth is adequate for many control-band and general audio-support tasks but may not meet higher-fidelity or line-level requirements. Confirm the required gain, distortion, slew rate, and output swing using the manufacturer electrical characteristics.
推薦
Industrial Threshold Detection
The TS934IN can compare a slowly varying sensor or process signal against a reference and drive a control threshold. Its low 20 µA supply current is advantageous in distributed or unattended monitoring equipment, while dual channels allow two comparison functions without adding a second package. Rail-to-rail output can improve use of the available signal range, but the 2.9 Vpp output swing specified at 2.7 V with a 100 kΩ load must be considered. Add hysteresis where noise near the threshold could cause repeated switching.
推薦
Low-Power Control and Interface Circuits
TS934IN is useful for buffering references and supporting low-speed control interfaces in embedded systems. Its 2.7 V minimum supply allows operation near common low-voltage rails, and the 14-DIP package simplifies through-hole prototypes, educational platforms, and service assemblies. The CMOS input characteristic is helpful when the source has high output impedance. Keep input and output returns within the amplifier's permitted common-mode and output-swing ranges, and configure the unused channel to prevent unexpected oscillation or excessive current draw.
推薦
推薦產品摘要
工程參考資料，適用於 TS934IN — 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 | TS934CN | TS934ID | TS934BN |
|---|---|---|---|---|
| Package | 14-DIP | 14-DIP | 14-DIP | 14-DIP |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Number of Amplifiers | 2 | 2 | 2 | 2 |
| Supply Voltage Range | 2.7 V to 10 V | 2.7 V to 10 V | 2.7 V to 10 V | 2.7 V to 10 V |
| Supply Current | 20 µA | 20 µA | 20 µA | 20 µA |
| Gain-Bandwidth Product | 100 kHz | 100 kHz | 100 kHz | 100 kHz |
| Input Bias Current | 1 pA | 1 pA | 1 pA | 1 pA |
| Output Swing at 2.7 V | 2.9 Vpp at RL = 100 kΩ | 2.9 Vpp at RL = 100 kΩ | 2.9 Vpp at RL = 100 kΩ | 2.9 Vpp at RL = 100 kΩ |
| Input Type | CMOS | CMOS | CMOS | CMOS |
| Special Offset Grade | TS934IN grade | TS934CN grade | TS934ID grade | TS93xB grade; 2 mV maximum low offset |
主要差異化特點
- Very low supply current for a dual rail-to-rail-output amplifier (對比MCP604T-E/SL)
- Operation begins at 2.7 V for low-voltage systems (對比MCP604T-E/SL)
- Dual amplifier in a through-hole 14-DIP package (對比TS934BN)
設計說明
Use the 20 µA supply-current specification as the starting point for the power budget, but include the load current and both amplifier channels in the final calculation. Estimated: with a 3.3 V supply and 20 µA total supply current, the device supply power is approximately 66 µW. This estimate excludes resistor-divider current, load current, leakage, and external circuitry.
Place the supply-bypass capacitor close to the positive and negative supply pins, and keep the feedback loop on the amplifier side of the board with a short return path. The TS934IN is a 14-DIP through-hole device, so pay particular attention to socket cleanliness and bent pins. Confirm every connection against the pin-description table in the manufacturer TS934 datasheet before energizing the board.
Do not assume full rail-to-rail input operation merely because the output is described as rail-to-rail. At a 2.7 V supply, the manufacturer specifies a 2.9 Vpp output swing with a 100 kΩ load; heavier loads can reduce usable swing. Also avoid high-Q feedback networks without stability analysis, and configure the unused dual channel according to the recommended circuit.
合規資訊
The TS934IN is a general-purpose operational amplifier. No specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status is stated in the manufacturer-family material used for this record.