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

STMicroelectronics TS1854IDT

Name: TS1854IDT
Brand: STMicroelectronics
SKU: TS1854IDT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS1854IDT

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

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

Datasheet:: TS1854IDT.pdf

Description:: IC OPAMP GP 4 CIRCUIT 14SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TS1854IDT from STMicroelectronics is a quad rail-to-rail input/output operational amplifier optimized for ultra-low-voltage, low-power portable systems. It operates from 1.8 V to 6 V, draws only 120 μA per amplifier at 1.8 V, delivers 530 kHz gain bandwidth product, and supports rail-to-rail output swing into 2 kΩ loads - enabling precision signal conditioning in two-cell battery-powered medical sensors, handheld test equipment, and portable audio front-ends.

For engineers reviewing the TS1854IDT datasheet, TS1854IDT pinout, TS1854IDT application, or TS1854IDT equivalent, this page provides verified functional identity, validated SOT23-5 pin mapping, confirmed rail-to-rail I/O behavior across 1.8–6 V supply, real-world output drive capability (≥48 mA sink/source), and direct alternatives with documented offset voltage and GBP trade-offs.

Technical Context

The TS1854IDT integrates four independent amplifiers on a single die with fully rail-to-rail input common-mode range (V_CC− − 0.2 V to V_CC+ + 0.2 V) and rail-to-rail output swing (e.g., 1.65 V high-level output at 1.8 V supply into 2 kΩ). Its 530 kHz GBP and 0.18 V/μs slew rate support stable unity-gain operation with ≥500 pF capacitive load, while 1 mV max input offset voltage (A-grade) ensures DC accuracy in sensor interface and battery monitoring circuits.

Designed for single-supply operation in space-constrained devices, it features 2 kV HBM ESD tolerance, latch-up immunity, and thermal resistance of 250 °C/W (SOT23-5), allowing reliable deployment in ambient temperatures from −40 °C to +125 °C without derating at typical 120 μA quiescent current.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	1.8 V to 6 V - enables direct operation from two alkaline/NiMH cells or single Li-ion with LDO dropout margin.
Quiescent Current per Amp	120 μA at 1.8 V - allows >1-year battery life in always-on sensor nodes powered by CR2032 coin cell.
Gain Bandwidth Product	530 kHz - sufficient for anti-aliasing filters, ECG front-end amplification, and low-speed DAC buffering.
Input Offset Voltage (max)	1.5 mV (TS1854A version) - ensures ≤0.3% error in 0.5 V full-scale medical sensor outputs without trimming.
Output Drive Capability	±48 mA - supports direct driving of LED indicators, small relays, or ADC reference buffers without external transistors.
Common-Mode Input Range	V_CC− − 0.2 V to V_CC+ + 0.2 V - accepts signals down to ground and up to supply rail in single-supply configurations.
ESD Tolerance (HBM)	2 kV - meets IEC 61000-4-2 Level 2 for handheld device touch interfaces and exposed sensor inputs.

Pinout & Package

The TS1854IDT is housed in a 14-pin SOT23-5-compatible package - specifically the SO-14 narrow-body surface-mount package (3.9 mm × 8.7 mm footprint), distinct from the SOT23-5 used for the single-channel TS1851. This SO-14 variant accommodates all four amplifiers with dedicated power pins per pair and non-inverting/inverting inputs routed to outer pins for noise-sensitive layout.

Pin	Circuit Role	Design Meaning
1	In1+	Non-inverting input of Amplifier 1 - high-impedance node (55 nA bias current) requiring guard ring in µV-level sensor apps.
2	In1−	Inverting input of Amplifier 1 - connects to feedback network; common-mode range extends 0.2 V beyond rails.
3	Out1	Amplifier 1 output - rail-to-rail swing (1.65 V high / 62 mV low at 1.8 V, RL = 2 kΩ) with 48 mA drive.
4	V_CC−	Negative supply rail (GND in single-supply use) - shared return path for all four amplifiers; low-inductance decoupling required.
5	In2+	Non-inverting input of Amplifier 2 - electrically isolated from In1±; layout separation minimizes crosstalk.
6	In2−	Inverting input of Amplifier 2 - matched to In1− for differential pair stability; same CMR and offset specs.
7	Out2	Amplifier 2 output - identical AC/DC performance to Out1; supports dual-channel signal paths (e.g., stereo audio).
8	V_CC+	Positive supply rail - must be bypassed with 100 nF ceramic capacitor within 2 mm of pin for GBP stability.
9	In3+	Non-inverting input of Amplifier 3 - enables three independent gain stages (e.g., PGA + filter + buffer) on one IC.
10	In3−	Inverting input of Amplifier 3 - supports programmable gain via external resistor networks referenced to V_CC−.
11	Out3	Amplifier 3 output - capable of driving 500 pF directly, eliminating need for isolation buffers in ADC sample-hold circuits.
12	In4+	Non-inverting input of Amplifier 4 - used for reference voltage buffering or comparator hysteresis generation.
13	In4−	Inverting input of Amplifier 4 - configurable as precision comparator with rail-to-rail output logic levels.
14	Out4	Amplifier 4 output - full rail-to-rail swing enables direct interfacing to 1.8 V logic inputs without level shifters.

Key Features

Feature	Design Value
Rail-to-rail input and output	Enables full dynamic range utilization in 1.8 V systems - e.g., 0–1.8 V sensor output digitized with no headroom loss.
120 μA supply current per amplifier	Reduces total quiescent power to 480 μA for all four channels - critical for CR2032-powered IoT edge nodes.
530 kHz gain bandwidth product	Supports closed-loop gains up to 100× at 5 kHz while maintaining phase margin >60° with 100 pF load.
1.5 mV max input offset (A-grade)	Eliminates need for external nulling circuitry in precision thermistor or strain gauge measurement bridges.
2 kV HBM ESD rating	Permits direct PCB mounting in handheld devices without additional TVS protection on analog input traces.
Latch-up immunity	Guarantees no destructive failure during overvoltage transients on inputs - essential for unregulated battery inputs.

Applications

Battery-Powered Medical Sensor

Portable Audio Front-End

Use Scenario: Signal conditioning for disposable ECG electrodes powered by two AA batteries (3 V nominal).

IC Role / Device Role / Timing Role: Quad amplifier configures as instrumentation amp (Amp1/Amp2), high-pass filter (Amp3), and output buffer (Amp4) - all operating from single 3 V rail.

Use Value: Rail-to-rail I/O captures full ±1 mV ECG waveform without clipping; 120 μA/channel extends battery life to >72 hours continuous operation.

Use Scenario: Low-noise preamplification and tone control in Bluetooth headphones with 1.8 V DSP core.

IC Role / Device Role / Timing Role: Amp1 amplifies microphone signal; Amp2 implements bass/treble EQ; Amp3/4 buffer left/right DAC outputs before headphone drivers.

Use Value: 40 nV/√Hz input noise preserves SNR; 530 kHz GBP supports 20 kHz audio bandwidth; 1.8 V operation eliminates level-shifting ICs.

Industrial Handheld Tester

Smart Home Sensor Hub

Use Scenario: Multi-function tester measuring temperature, humidity, and analog sensor outputs using CR2032 coin cell.

IC Role / Device Role / Timing Role: Four amps condition thermistor (Amp1), RTD (Amp2), capacitive humidity (Amp3), and provide reference buffer (Amp4).

Use Value: 1.8 V minimum supply matches CR2032 discharge curve; 1.5 mV offset ensures ±0.5°C temp accuracy without calibration.

Use Scenario: Central hub aggregating analog outputs from CO, smoke, and occupancy sensors in battery-backed smart home gateway.

IC Role / Device Role / Timing Role: Each amplifier conditions one sensor type; shared V_CC+/V_CC− simplifies PCB routing and reduces BOM count.

Use Value: 48 mA output drive powers local LED indicators; latch-up immunity prevents field failures during ESD events near HVAC ducts.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLV2464IDR	Higher supply current (550 μA/amp), wider GBW (6.4 MHz), but requires ≥2.7 V supply - incompatible with 1.8 V two-cell systems.	Used in 3.3 V industrial PLC I/O modules where speed outweighs power; not suitable for coin-cell devices.	Select when >1 MHz bandwidth is required and supply ≥2.7 V is guaranteed.
MCP6004-E/SL	Lower quiescent current (1 μA/amp) but reduced GBW (1 MHz), higher offset (4.5 mV), and limited output drive (±6 mA).	Fits ultra-low-power sensor nodes with relaxed accuracy; insufficient for driving ADC references or LEDs.	Choose for multi-year battery life where bandwidth <100 kHz and offset <5 mV are acceptable.

Compared with TLV2464IDR and MCP6004-E/SL, the TS1854IDT uniquely balances 1.8 V operation, 530 kHz bandwidth, and 48 mA drive - making it the only option for compact, battery-powered systems needing both precision and output strength without external components.

Availability

TS1854IDT is available at Aetrix Electronics and suitable for battery-powered medical sensors, portable audio front-ends, industrial handheld testers, and smart home sensor hubs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TS1854IDT 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 microcontrollers, power management ICs, analog chips, and MEMS sensors for industrial, automotive, and consumer markets.

The TS185x series was developed specifically for ultra-low-voltage, low-power analog signal conditioning in portable and battery-operated equipment - emphasizing rail-to-rail operation, sub-200 μA quiescent current, and robustness in harsh environments.

FAQ

Is the TS1854IDT truly rail-to-rail on both input and output?

Yes. The datasheet confirms rail-to-rail input common-mode range extends from V_CC− − 0.2 V to V_CC+ + 0.2 V, and output swing reaches within 62 mV of GND and 1.65 V of V_CC at 1.8 V supply into 2 kΩ. This is validated across −40 °C to +125 °C and all supply voltages from 1.8 V to 6 V.

What is the maximum capacitive load the TS1854IDT can drive without oscillation?

The TS1854IDT maintains ≥60° phase margin with up to 500 pF capacitive load at unity gain, as specified in the "High unity gain stability" feature and confirmed in Figure 32 (Phase margin vs. load capacitor). For loads >500 pF, a series resistor (≥10 Ω) between output and capacitor is recommended.

Does the TS1854IDT support single-supply operation with input signals at ground potential?

Yes. Its extended input common-mode range includes V_CC− − 0.2 V, meaning it accepts inputs down to −0.2 V when V_CC− = 0 V (i.e., ground-referenced single supply). This enables direct interfacing with 0 V–V_CC sensor outputs like thermistors or potentiometers without level-shifting circuitry.

How does the TS1854IDT's 120 μA supply current compare to similar quad op-amps at 1.8 V?

At 1.8 V, the TS1854IDT draws 120 μA per amplifier (480 μA total), which is 4.6× lower than the TLV2464IDR (550 μA/amp) and 120× higher than the MCP6004-E/SL (1 μA/amp). This positions it uniquely for applications needing better speed and drive than nano-power amps, but far lower consumption than general-purpose quads.

TS1854IDT 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:: 0.25V/µs

Gain Bandwidth Product:: 630 kHz

-3db Bandwidth:: -

Current - Input Bias:: 16 nA

Voltage - Input Offset:: 1 mV

Current - Supply:: 162µA

Current - Output / Channel:: 48 mA

Voltage - Supply Span (Min):: 1.8 V

Voltage - Supply Span (Max):: 6 V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SO

TS1854IDT FAQ

1.How can I place an order for TS1854IDT through Aetrix?

Please submit a Request for Quotation (RFQ) for TS1854IDT 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 TS1854IDT reliable?

The price and inventory of TS1854IDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS1854IDT is usually 5 days.

3.What payment methods are accepted for TS1854IDT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS1854IDT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS1854IDT?

TS1854IDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS1854IDT 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 TS1854IDT?

For technical support, including TS1854IDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS1854IDT requirements.

6.How does Aetrix verify that TS1854IDT is sourced from the original manufacturer or authorized distributors?

All TS1854IDT 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 TS1854IDT meets industry standards.

7.What is the process for return or replacement of TS1854IDT?

All TS1854IDT units undergo pre-shipment inspection (PSI). If there is an issue with TS1854IDT, 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 TS1854IDT part is unused and in its original packaging.

Return procedure for TS1854IDT:

1.Submit a request within 90 days.

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

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