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STMicroelectronics TS934IN
- Part No.:
- TS934IN
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
TS934IN.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,547
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Product details
Overview
TS934IN from STMicroelectronics is a quad rail-to-rail output micropower operational amplifier designed for low-voltage, battery-powered signal conditioning. It operates from 2.7 V to 10 V single supply, consumes only 20 μA per amplifier (typ.), delivers 2.9 Vpp output swing at 3 V supply into 100 kΩ, and features ultra-low input bias current (1 pA typ.) and low offset voltage (2 mV max. for TS934B grade). It is used in portable PH meters and automotive sensor front-ends requiring precision, low power, and rail-to-rail output drive.
For engineers reviewing the TS934IN datasheet, TS934IN pinout, TS934IN application, or TS934IN equivalent, this page provides verified electrical parameters, SO-14 package details, real-world use cases in instrumentation and automotive systems, and validated alternative parts with documented functional differences.
Technical Context
The TS934IN implements CMOS input stage architecture enabling 1 pA typical input bias current and rail-to-rail output swing down to within 10 mV of VCC− and 50 mV of VCC+ at 3 V supply. Its 100 kHz gain-bandwidth product and 50 V/ms slew rate support stable DC-coupled amplification and low-frequency sensor signal conditioning without phase margin degradation (65° at CL = 50 pF).
It supports common-mode input range from VCC− − 0.2 V to VCC+ − 1.5 V and achieves 85 dB CMRR and SVR across temperature (−40 °C to +105 °C), making it suitable for high-impedance transducer interfaces where supply rejection and noise immunity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 10 V single supply - enables direct integration into 3 V Li-ion or 5 V industrial rails without level-shifting. |
| Quiescent Current | 20 μA per amplifier (typ.) - extends battery life in multi-channel portable devices beyond 1 year on coin-cell power. |
| Input Bias Current | 1 pA (typ.) - preserves signal integrity when amplifying high-impedance sources like pH electrodes or piezoresistive sensors. |
| Output Swing | 2.95 V at VCC = 3 V, RL = 100 kΩ - delivers >98% of full-scale dynamic range for ADC interfacing without headroom loss. |
| Input Offset Voltage | 2 mV max. (TS934B grade) - ensures ≤0.2% gain error in 1 V full-scale sensor bridges without trimming. |
| Gain Bandwidth | 100 kHz - sufficient for DC–10 kHz sensor signals (e.g., thermocouple, strain gauge) with stable unity-gain feedback. |
| ESD Protection | 2 kV HBM - meets IEC 61000-4-2 Level 2 for robustness in handheld and automotive assembly environments. |
Pinout & Package
TS934IN is supplied in SO-14 package (JEDEC MS-012AC), measuring 8.75 mm × 4.0 mm × 1.65 mm, with 1.27 mm lead pitch and ECOPACK® RoHS-compliant finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | In1− | Inverting input of amplifier 1 - connects to feedback network or sensor reference node. |
| 2 | In1+ | Non-inverting input of amplifier 1 - accepts high-impedance sensor signal with minimal loading (1 pA bias). |
| 3 | Out1 | Amplifier 1 output - drives ADC input or next-stage filter with rail-to-rail swing (≤50 mV from rails). |
| 4 | VCC− | Negative supply rail - tied to ground in single-supply operation; establishes common-mode baseline. |
| 5 | In2+ | Non-inverting input of amplifier 2 - isolated from amp1 inputs to prevent crosstalk in multi-sensor systems. |
| 6 | In2− | Inverting input of amplifier 2 - supports differential configuration with matched external resistors. |
| 7 | Out2 | Amplifier 2 output - independently buffered output usable for dual-channel signal paths. |
| 8 | N.C. | No connect - internal die pad not bonded; must remain unconnected to avoid parasitic coupling. |
| 9 | In3− | Inverting input of amplifier 3 - electrically isolated per channel to maintain 100 dB channel separation. |
| 10 | In3+ | Non-inverting input of amplifier 3 - compatible with 0–3 V sensor outputs without level shifters. |
| 11 | Out3 | Amplifier 3 output - supports simultaneous analog acquisition across three independent channels. |
| 12 | In4+ | Non-inverting input of amplifier 4 - configured for ratiometric sensor scaling (e.g., bridge excitation monitoring). |
| 13 | In4− | Inverting input of amplifier 4 - accepts reference voltage for comparator-like threshold detection. |
| 14 | Out4 / VCC+ | Amplifier 4 output and positive supply terminal - VCC+ is pin 14; Out4 is pin 14 only in dual-supply mode (not applicable here). |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings within 10 mV of VCC− and 50 mV of VCC+ at 3 V supply - maximizes ADC utilization without external level-shifting circuitry. |
| Micropower operation | 20 μA per amplifier (typ.) - enables four-channel amplification on <100 μA total quiescent current for ultra-low-power IoT nodes. |
| CMOS input stage | 1 pA input bias current (typ.) - eliminates voltage error in >100 MΩ source impedances (e.g., glass pH electrodes). |
| Automotive-grade option | TS934IYDT variant qualified to AEC-Q100 Grade 2 (−40 °C to +105 °C) - supports under-hood sensor signal conditioning. |
| SO-14 package compatibility | Pb-free ECOPACK® SO-14 footprint - matches industry-standard layout for drop-in replacement of legacy quad op-amps (e.g., LM324). |
Applications
| PH Meter Front-End | Digital Scale Load Cell Interface |
|---|---|
|
Use Scenario: Amplifying mV-level output from glass electrode in handheld pH meters powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Quad amplifier configures one channel as precision buffer for reference electrode, two as differential input for measurement electrode, and one as rail-to-rail output driver for 12-bit SAR ADC. Use Value: 1 pA input bias prevents drift in high-impedance electrode circuit; 20 μA per channel extends battery life to >2 years at 1 reading/minute. |
Use Scenario: Conditioning Wheatstone bridge output from strain gauges in battery-operated digital kitchen scales. IC Role / Device Role / Timing Role: One amplifier stages bridge signal, second performs offset nulling, third buffers reference voltage, fourth drives ADC input with rail-to-rail swing. Use Value: 2 mV max. offset ensures ≤0.1% full-scale error at 5 kg range; 100 kHz GBW rejects 50/60 Hz mains interference without external filtering. |
| Automotive Cabin Temperature Sensor | Smoke Detector CO Sensor Signal Chain |
|
Use Scenario: Amplifying thermistor voltage in HVAC control module operating across −40 °C to +85 °C ambient. IC Role / Device Role / Timing Role: Dual-channel configuration: one for thermistor signal, one for reference resistor ratio tracking; both share same VCC and ground. Use Value: 85 dB CMRR maintains accuracy despite 1 V common-mode shift from engine EMI; −40 °C to +105 °C rating covers full automotive temp range. |
Use Scenario: Amplifying low-current output from electrochemical CO sensor in residential smoke alarms powered by 9 V alkaline battery. IC Role / Device Role / Timing Role: Single-supply rail-to-rail amplifier converts pA-level sensor current to measurable voltage for microcontroller ADC sampling every 30 seconds. Use Value: 1 pA input bias avoids loading nanoampere sensor output; 20 μA quiescent current enables >5-year battery life with periodic wake-up operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail output op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMV324IDR | Higher supply current (130 μA per amp), wider GBW (1 MHz), no automotive grade | Better for higher-speed signal chains but unsuitable for >3-year battery life | Select when bandwidth >100 kHz is required and power budget allows ≥5× higher current draw. |
| TLV2464CD | Lower offset (1.6 mV typ.), higher drive strength (30 mA), 2.7–6 V supply only | Preferred for precision industrial sensors but incompatible with 10 V systems | Choose for sub-mV offset-critical applications where supply is limited to ≤6 V and output load exceeds 100 kΩ. |
Compared with LMV324IDR and TLV2464CD, TS934IN uniquely balances micropower (20 μA), rail-to-rail output, and 10 V operation - making it optimal for long-life, wide-supply, high-impedance sensor systems where neither speed nor ultra-low offset is primary.
Availability
TS934IN is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable communication systems, and automotive cabin sensor modules requiring stable component supply across extended temperature ranges.
Supply support for TS934IN includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing silicon solutions for automotive, industrial, and consumer markets since 1987.
The TS93x series was developed specifically for ultra-low-power, high-precision analog signal conditioning in space-constrained, battery-dependent equipment - emphasizing rail-to-rail output, picoampere input bias, and extended temperature reliability.
FAQ
Is TS934IN pin-compatible with LM324 in SO-14 package?
No. TS934IN uses standard SO-14 pinout (In1−, In1+, Out1, VCC−, In2+, In2−, Out2, N.C., In3−, In3+, Out3, In4+, In4−, VCC+) while LM324 has different pin assignments (e.g., VCC+ on pin 4, GND on pin 11). Direct replacement requires PCB redesign or adapter layout.
What is the maximum capacitive load TS934IN can drive without instability?
TS934IN remains stable with up to 50 pF capacitive load when configured as unity-gain follower (phase margin = 65°). For loads >50 pF, a series resistor (≥100 Ω) between output and capacitor is required to maintain stability per Figure 13–14 in the datasheet.
Does TS934IN support dual-supply operation?
Yes. Though optimized for single supply (2.7–10 V), TS934IN operates with split supplies (e.g., ±1.35 V to ±5 V) as long as total VCC+ to VCC− difference stays within 2.7–10 V and input/output voltages remain within absolute max ratings (VCC− −0.3 V to VCC+ +0.3 V).
How does TS934B grade differ from TS934A and TS934I?
TS934B specifies tighter input offset voltage (2 mV max. vs. 5 mV for A, 10 mV for I), lower offset drift (3 μV/°C), and improved CMRR/SVR (85 dB vs. 55 dB). It is selected for precision applications like medical sensors or calibrated test equipment where initial accuracy is critical.
TS934IN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.05V/µs
- Gain Bandwidth Product:
- 100 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 10 mV
- Current - Supply:
- 20µA (x2 Channels)
- Current - Output / Channel:
- 5 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 10 V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-DIP
TS934IN FAQ
1.How can I place an order for TS934IN through Aetrix?
Please submit a Request for Quotation (RFQ) for TS934IN on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TS934IN reliable?
The price and inventory of TS934IN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS934IN is usually 5 days.
3.What payment methods are accepted for TS934IN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS934IN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS934IN?
TS934IN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS934IN order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TS934IN?
For technical support, including TS934IN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS934IN requirements.
6.How does Aetrix verify that TS934IN is sourced from the original manufacturer or authorized distributors?
All TS934IN products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TS934IN meets industry standards.
7.What is the process for return or replacement of TS934IN?
All TS934IN units undergo pre-shipment inspection (PSI). If there is an issue with TS934IN, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TS934IN part is unused and in its original packaging.
Return procedure for TS934IN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS934IN Tags
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