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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

STMicroelectronics TS934IDT

Name: TS934IDT
Brand: STMicroelectronics
SKU: TS934IDT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS934IDT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: TS934IDT.pdf

Description:: IC OPAMP GP 4 CIRCUIT 14SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TS934IDT from STMicroelectronics is a quad rail-to-rail output micropower operational amplifier in SO-14 package, designed for low-voltage single-supply operation (2.7–10 V), delivering 2.9 Vpp output swing at 3 V supply with 20 μA per amplifier quiescent current and 2 mV max input offset voltage (TS934B grade). It serves as signal conditioning front-end in battery-powered sensor interfaces and portable instrumentation.

For engineers reviewing the TS934IDT datasheet, TS934IDT pinout, TS934IDT application, or TS934IDT equivalent, key selection criteria include rail-to-rail output drive into 100 kΩ, ultra-low 1 pA input bias current, automotive-grade temperature range (−40 to +105 °C), and SO-14 package compatibility with space-constrained PCB layouts.

Technical Context

The TS934IDT implements CMOS-input, micropower op-amp architecture optimized for precision DC-coupled amplification under low supply voltage. Its input stage features ultra-low input bias current (1 pA typ.) and rail-to-rail common-mode input range (VCC− −0.2 V to VCC+ −1.5 V), enabling direct interfacing with high-impedance sensors.

Output stage delivers rail-to-rail swing (e.g., 2.95 V at VCC = 3 V, RL = 100 kΩ) with 1.5 mA source/sink capability and 100 kHz gain-bandwidth product. Phase margin is 65° with 50 pF load, ensuring stable unity-gain follower operation without external compensation.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	2.7–10 V single supply - supports direct integration into 3 V and 5 V battery-powered systems without level-shifting.
Quiescent Current	20 μA per amplifier - enables multi-year operation on coin-cell batteries in always-on sensor nodes.
Input Offset Voltage	2 mV max (TS934B grade) - ensures ≤0.2% error in 1 V full-scale analog front-ends without trimming.
Input Bias Current	1 pA typical - preserves signal integrity when amplifying outputs from pH electrodes or piezoresistive sensors.
Output Swing	2.95 V at VCC = 3 V, RL = 100 kΩ - delivers >98% of rail-to-rail dynamic range for maximum ADC utilization.
Gain-Bandwidth Product	100 kHz - sufficient for DC–10 kHz sensor signal conditioning (e.g., thermistor, strain gauge, smoke detector ion chamber).
Common-Mode Range	VCC− −0.2 V to VCC+ −1.5 V - allows direct sensing of signals referenced to ground or near-VCC in single-supply topologies.

Pinout & Package

TS934IDT is housed in a 14-lead SOIC (SO-14) package with 1.27 mm pitch, body dimensions 8.75 mm × 4.0 mm × 1.65 mm (max height), ECOPACK® compliant, rated for −40 to +105 °C operation.

Pin/Terminal	Circuit Role	Design Meaning
1	In1−	Inverting input of amplifier 1 - accepts differential or single-ended signals with rail-to-rail common-mode range.
2	In1+	Non-inverting input of amplifier 1 - ultra-high impedance (1 pA bias) for minimal loading of high-Z sources.
3	Out1	Amplifier 1 output - rail-to-rail capable, drives ≥100 kΩ loads with <50 mV saturation voltage.
4	VCC−	Negative supply rail - connects to system ground in single-supply configurations.
5	In2+	Non-inverting input of amplifier 2 - identical electrical characteristics to Pin 2.
6	In2−	Inverting input of amplifier 2 - matches Pin 1 performance and layout symmetry.
7	Out2	Amplifier 2 output - independent channel, fully decoupled from Out1 for dual-sensor readout.
8	VCC+	Positive supply rail - accepts 2.7–10 V; internal ESD protection rated to 2 kV HBM.
9	In3−	Inverting input of amplifier 3 - enables three-channel simultaneous acquisition in compact layout.
10	In3+	Non-inverting input of amplifier 3 - maintains 1 pA bias current and 2 mV offset across all channels.
11	Out3	Amplifier 3 output - rail-to-rail swing supports multiplexed ADC sampling without external buffers.
12	In4+	Non-inverting input of amplifier 4 - completes quad-channel configuration for 4-sensor systems (e.g., quad-axis tilt, multi-gas detection).
13	In4−	Inverting input of amplifier 4 - matched to other inputs for consistent channel-to-channel performance.
14	Out4	Amplifier 4 output - fully specified for 100 kΩ load, enabling direct connection to SAR or sigma-delta ADC reference inputs.

Key Features

Feature	Design Value
Rail-to-rail output swing	Delivers 2.95 V output at 3 V supply into 100 kΩ - maximizes dynamic range for 10-bit+ ADCs without external level-shifting.
Micropower operation	20 μA per amplifier - reduces total quiescent draw to 80 μA for quad configuration, extending shelf life in smoke detectors.
Ultra-low input bias current	1 pA typical - eliminates voltage error across 10 MΩ sensor impedances (e.g., pH glass electrode), preserving accuracy.
Low input offset voltage	2 mV max (TS934B) - enables <0.1% gain error in 2.5 V reference-based transducer signal chains without calibration.
Automotive-grade temperature range	−40 to +105 °C operation - qualified per AEC-Q100 for under-hood and cabin-mounted automotive sensor modules.

Applications

Portable PH Meters

Digital Weight Scales

Use Scenario: Amplifying mV-level output from glass pH electrode in handheld field tester with 3 V coin-cell supply.

IC Role / Device Role / Timing Role: Precision DC-coupled buffer and gain stage with ultra-high input impedance to prevent electrode polarization.

Use Value: 1 pA input bias current prevents measurement drift over 30-second stabilization period; rail-to-rail output drives 12-bit SAR ADC directly.

Use Scenario: Conditioning bridge output from load cell in battery-powered kitchen scale operating at 3 V.

IC Role / Device Role / Timing Role: Instrumentation amplifier front-end with low-noise, low-offset gain before 24-bit sigma-delta ADC.

Use Value: 2 mV max offset contributes <0.08% FS error at 5 V full-scale bridge; 20 μA per amp extends 2-year battery life.

Smoke Detector Ion Chambers

Automotive Cabin Air Quality Sensors

Use Scenario: Detecting femtoamp-level current changes in ionization chamber during smoke ingress event.

IC Role / Device Role / Timing Role: Transimpedance amplifier converting chamber current to measurable voltage with minimal leakage path.

Use Value: 1 pA input bias current ensures <1% error in 100 fA signal detection; latch-up immunity prevents false alarms during ESD events.

Use Scenario: Signal conditioning for NDIR CO₂ and VOC sensors in automotive HVAC control module.

IC Role / Device Role / Timing Role: Quad-channel analog front-end for simultaneous temperature, humidity, CO₂, and VOC signal processing.

Use Value: −40 to +105 °C rating ensures reliability across cabin temperature extremes; SO-14 footprint simplifies 4-channel routing on 4-layer PCB.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad micropower op-amp applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LMV334IDR	Higher 65 μA supply current; 7 mV max offset; no automotive qualification.	Limited to commercial-temp industrial handhelds; unsuitable for automotive or long-life battery use.	Select only if cost sensitivity outweighs power/accuracy requirements and AEC-Q100 is not required.
MCP6004-E/SL	30 μA supply current; 4.5 mV max offset; 100 kHz GBW; no 2 kV ESD rating.	Acceptable for consumer-grade scales and alarms but lacks latch-up immunity and automotive temp range.	Prefer for non-safety-critical, cost-driven designs where 105 °C operation is not mandated.

Compared with LMV334IDR and MCP6004-E/SL, TS934IDT provides superior micropower efficiency (20 μA vs. ≥30 μA), tighter offset (2 mV vs. ≥4.5 mV), and guaranteed automotive qualification - making it the only choice for safety-relevant, long-life, or high-precision sensor front-ends.

Availability

TS934IDT is available at Aetrix Electronics and suitable for battery-powered systems, portable communication systems, and automotive cabin sensor modules requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for TS934IDT 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 analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The TS93x series was developed specifically for ultra-low-power, precision analog signal conditioning in resource-constrained environments - emphasizing rail-to-rail operation, sub-1 pA input bias, and extended temperature reliability.

FAQ

What is the maximum capacitive load the TS934IDT can drive while maintaining stability?

The TS934IDT is characterized for stable unity-gain operation with up to 50 pF capacitive load, achieving 65° phase margin per amplifier. Driving >50 pF requires external isolation resistor (≥100 Ω) between output and load capacitance to prevent peaking or oscillation - verified in Figure 13 and Figure 14 of the datasheet.

Does TS934IDT support true rail-to-rail input common-mode range?

No - the input common-mode range is VCC− −0.2 V to VCC+ −1.5 V, meaning it does not accept signals within 1.5 V of the positive rail. This limitation is intentional to ensure CMOS input stage reliability and is documented in Table 3 (Vicm specification) and confirmed across all test conditions in Tables 4 and 5.

Can TS934IDT be used in single-supply 2.7 V applications with 100 kΩ load?

Yes - at VCC = 2.7 V, the device delivers ≥2.6 V output swing into 100 kΩ (extrapolated from 2.95 V at 3 V and 4.95 V at 5 V), with supply current remaining ≤33 μA per amplifier. Output saturation voltage stays below 100 mV, enabling functional interface with 8-bit and 10-bit ADCs.

Is the SO-14 package of TS934IDT lead-free and RoHS compliant?

Yes - TS934IDT uses ST's ECOPACK®-compliant SO-14 package, meeting RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3. Full compliance documentation, including Pb-free soldering profiles and halogen-free status, is available in ST's ECOPACK® database at www.st.com.

TS934IDT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Amplifier Type:: General Purpose

Number of Circuits:: 4

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 (x4 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:: Surface Mount

Supplier Device Package:: 14-SO

TS934IDT FAQ

1.How can I place an order for TS934IDT through Aetrix?

Please submit a Request for Quotation (RFQ) for TS934IDT 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 TS934IDT reliable?

The price and inventory of TS934IDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS934IDT is usually 5 days.

3.What payment methods are accepted for TS934IDT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS934IDT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS934IDT?

TS934IDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS934IDT 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 TS934IDT?

For technical support, including TS934IDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS934IDT requirements.

6.How does Aetrix verify that TS934IDT is sourced from the original manufacturer or authorized distributors?

All TS934IDT 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 TS934IDT meets industry standards.

7.What is the process for return or replacement of TS934IDT?

All TS934IDT units undergo pre-shipment inspection (PSI). If there is an issue with TS934IDT, 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 TS934IDT part is unused and in its original packaging.

Return procedure for TS934IDT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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