My Inquiry
My Account
STMicroelectronics TS1854IPT
- Part No.:
- TS1854IPT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TS1854IPT.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,505
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TS1854IPT 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 supply, draws only 120 μA per amplifier at 1.8 V, delivers 530 kHz gain bandwidth, and supports rail-to-rail output swing (1.71 V at VCC = 1.8 V, RL = 2 kΩ) - enabling precision signal conditioning in two-cell battery-powered medical sensors and handheld instrumentation.
For engineers reviewing the TS1854IPT datasheet, TS1854IPT pinout, TS1854IPT application, or TS1854IPT equivalent, this device is selected for its extended common-mode range (VCC− − 0.2 V to VCC+ + 0.2 V), high unity-gain stability with 500 pF capacitive loads, and guaranteed 1 mV max input offset voltage (A-grade version), making it suitable for low-voltage sensor front-ends and battery-fueled data acquisition circuits.
Technical Context
The TS1854IPT integrates four independent amplifiers sharing a single 1.8–6 V supply, each featuring complementary input stage architecture enabling rail-to-rail input common-mode range beyond supply rails and rail-to-rail output swing down to <100 mV from rails. Its internal compensation ensures stable unity-gain operation without external components even when driving 500 pF loads.
Designed for battery-constrained environments, the amplifier uses subthreshold-biased input transistors to achieve 120 μA supply current per channel at 1.8 V while maintaining 530 kHz GBP and 0.18 V/μs slew rate - balancing speed, power, and DC precision across −40 °C to +125 °C operating temperature.
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. |
| Supply Current per Amplifier | 120 μA (typ. at 1.8 V) - allows >10-year battery life in always-on sensor nodes powered by CR2032 coin cell. |
| Gain Bandwidth Product | 530 kHz (typ. at 1.8 V) - supports anti-aliasing filtering and buffered sensor signal amplification up to ~50 kHz. |
| Input Offset Voltage (A-grade) | 1 mV max (over temp) - ensures ≤0.5% error in 12-bit ADC front-end with 2 V full-scale range. |
| Rail-to-Rail Output Swing | 1.71 V at VCC = 1.8 V, RL = 2 kΩ - delivers >95% of supply rail, maximizing dynamic range in low-voltage ADC drivers. |
| Common-Mode Input Range | VCC− − 0.2 V to VCC+ + 0.2 V - accepts inputs 200 mV below ground or above VCC, simplifying single-supply transducer interfacing. |
| Capacitive Load Drive | Stable with 500 pF - eliminates need for isolation resistor when driving ADC input capacitance or long PCB traces. |
Pinout & Package
The TS1854IPT is housed in a 14-pin TSSOP package (3.0 mm × 4.4 mm × 1.05 mm height) with exposed thermal pad for enhanced power dissipation in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | In1+ | Non-inverting input of amplifier 1 - referenced to VCC−; accepts signals down to VCC− − 0.2 V. |
| 2 | In1− | Inverting input of amplifier 1 - differential pair node; matched to In1+ for <1 mV offset. |
| 3 | Out1 | Output of amplifier 1 - rail-to-rail capable; drives 2 kΩ load to within 100 mV of rails at 1.8 V. |
| 4 | VCC− | Negative supply rail - connects to system ground or negative bias; all inputs referenced to this node. |
| 5 | In2+ | Non-inverting input of amplifier 2 - electrically isolated from In1±; supports independent signal paths. |
| 6 | In2− | Inverting input of amplifier 2 - matched input pair with In2+; shares same offset drift spec (2 μV/°C). |
| 7 | Out2 | Output of amplifier 2 - identical AC/DC specs to Out1; no crosstalk specified between channels. |
| 8 | VCC+ | Positive supply rail - supplies all four amplifiers; decoupling capacitor required at pin for stability. |
| 9 | In3+ | Non-inverting input of amplifier 3 - third independent channel; layout symmetry minimizes inter-channel mismatch. |
| 10 | In3− | Inverting input of amplifier 3 - matched pair with In3+; same input bias current (10–80 nA) as other channels. |
| 11 | Out3 | Output of amplifier 3 - rail-to-rail swing confirmed per channel; no shared output stage. |
| 12 | In4+ | Non-inverting input of amplifier 4 - fourth channel; supports simultaneous multi-sensor buffering. |
| 13 | In4− | Inverting input of amplifier 4 - fully differential input structure; CMRR ≥55 dB over full temperature range. |
| 14 | Out4 | Output of amplifier 4 - independently buffered; phase margin ≥60° ensures stability in closed-loop configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O with extended Vicm | Enables single-supply operation with transducers whose output spans below ground or above VCC, eliminating level-shifting circuitry. |
| 120 μA per amplifier supply current | Reduces total quiescent power to 480 μA for all four channels at 1.8 V - critical for energy-harvesting and coin-cell applications. |
| 530 kHz gain bandwidth at 1.8 V | Supports closed-loop bandwidths up to ~50 kHz with unity-gain configuration, sufficient for ECG, pulse oximetry, and environmental sensing. |
| 1 mV max input offset (A-grade) | Minimizes calibration overhead in precision measurement systems; maintains accuracy without trimming resistors or digital correction. |
| Stable with 500 pF capacitive load | Permits direct connection to SAR ADC inputs (typically 10–30 pF) and long trace routing without destabilizing feedback loop. |
| ESD tolerance: 2 kV HBM | Meets IEC 61000-4-2 Level 2 requirements for handheld equipment, reducing need for external protection diodes. |
Applications
| Portable Medical Sensors | Two-Cell Battery Systems |
|---|---|
|
Use Scenario: Signal conditioning for disposable glucose strip readers using amperometric biosensors. IC Role / Device Role / Timing Role: Quad amplifier configures as transimpedance amplifier (Ch1), reference buffer (Ch2), filter stage (Ch3), and ADC driver (Ch4). Use Value: Rail-to-rail output swing maximizes 1.8 V ADC full-scale utilization; 120 μA/channel extends CR2032 battery life to >2 years in intermittent-use devices. |
Use Scenario: Power management and battery monitoring in cordless phone handsets. IC Role / Device Role / Timing Role: Amplifies battery voltage divider output (Ch1), conditions microphone signal (Ch2), buffers reference for fuel gauge IC (Ch3), and drives LED dimming control (Ch4). Use Value: Extended Vicm allows accurate measurement of battery voltage down to 1.8 V without external level shifters; low ICC reduces standby current leakage. |
| Industrial Handheld Meters | Low-Power IoT Edge Nodes |
|
Use Scenario: Analog front-end for 4–20 mA loop-powered multimeters with local display. IC Role / Device Role / Timing Role: Ch1–Ch2 implement dual-channel current-to-voltage conversion; Ch3–Ch4 provide active filtering and gain staging before 12-bit SAR ADC. Use Value: 1 mV max Vio ensures <0.1% reading error across 0–100 °C; rail-to-rail I/O eliminates need for dual supplies in compact enclosure. |
Use Scenario: Sensor fusion hub aggregating temperature, humidity, and motion data for BLE transmission. IC Role / Device Role / Timing Role: Buffers thermistor/RTD outputs (Ch1–Ch2), conditions accelerometer analog outputs (Ch3), and drives low-pass filter into ADC (Ch4). Use Value: 530 kHz GBP supports anti-aliasing filter design with cutoff at 20 kHz; 2 kV HBM ESD rating protects against handling damage during field deployment. |
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 |
|---|---|---|---|
| MCP6004-E/ST | Higher supply current (100 μA per amp at 1.8 V vs. TS1854IPT's 120 μA); lower GBP (1 MHz vs. 530 kHz); no extended Vicm (VSS to VDD only). | Better for higher-speed, lower-precision apps; unsuitable for sub-rail input signals like shunt-based current sensing. | Select when >1 MHz bandwidth is needed and input signals stay within supply rails. |
| LMV324IDR | Wider supply range (2.7–5.5 V); higher ICC (180 μA per amp); no rail-to-rail input (VCM = V− to V+ − 1.5 V); larger SO-14 package. | Requires ≥2.7 V supply; cannot interface directly with 1.8 V logic or sub-rail sensors without level shifting. | Choose only if existing design uses 3.3 V supply and board space permits SO-14 footprint. |
Compared with MCP6004-E/ST and LMV324IDR, the TS1854IPT uniquely combines true rail-to-rail input beyond supply rails, 1.8 V minimum operation, and sub-130 μA quiescent current - making it the only option among the three viable for CR2032-powered, single-supply, precision analog front-ends requiring sub-200 mV headroom.
Availability
TS1854IPT is available at Aetrix Electronics and suitable for portable medical sensors, two-cell battery systems, industrial handheld meters, and low-power IoT edge nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TS1854IPT 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 TS1854IPT belongs to ST's TS185x family of micropower rail-to-rail op-amps, engineered specifically for battery-operated portable equipment where ultra-low supply voltage, minimal quiescent current, and precision DC performance are mandatory.
FAQ
What is the maximum capacitive load the TS1854IPT can drive while remaining stable?
The TS1854IPT is specified to maintain ≥60° phase margin and stable unity-gain operation with up to 500 pF capacitive load, as verified in Figure 32 of the datasheet. This eliminates the need for series isolation resistors when driving typical SAR ADC input capacitances (10–30 pF) or longer PCB traces, simplifying layout and preserving signal integrity.
Does the TS1854IPT support true rail-to-rail input, including voltages below the negative supply rail?
Yes - the TS1854IPT features an extended common-mode input range of VCC− − 0.2 V to VCC+ + 0.2 V, confirmed in Table 3 of the datasheet. This allows direct interfacing with transducers that output signals slightly below ground (e.g., shunt-based current monitors) without external level-shifting circuitry.
How does the TS1854IPT's input offset voltage compare between standard and 'A' grade versions?
The standard TS1854IPT has a maximum input offset voltage of 6 mV over temperature, while the TS1854A variant (e.g., TS1854AIPT) guarantees ≤1 mV max. Both grades share identical supply current, GBP, and rail-to-rail performance - the 'A' grade is selected exclusively for high-accuracy DC-coupled applications like precision sensor signal chains.
Can the TS1854IPT operate reliably at −40 °C and +125 °C?
Yes - the TS1854IPT is fully characterized and guaranteed over −40 °C to +125 °C ambient temperature, with electrical parameters including supply current, GBP, and input offset voltage validated across this range in Tables 4–6 and Figures 7–9 of the datasheet. No derating is required for industrial or automotive under-hood use cases.
TS1854IPT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm 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-TSSOP
TS1854IPT FAQ
1.How can I place an order for TS1854IPT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS1854IPT 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 TS1854IPT reliable?
The price and inventory of TS1854IPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS1854IPT is usually 5 days.
3.What payment methods are accepted for TS1854IPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS1854IPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS1854IPT?
TS1854IPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS1854IPT 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 TS1854IPT?
For technical support, including TS1854IPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS1854IPT requirements.
6.How does Aetrix verify that TS1854IPT is sourced from the original manufacturer or authorized distributors?
All TS1854IPT 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 TS1854IPT meets industry standards.
7.What is the process for return or replacement of TS1854IPT?
All TS1854IPT units undergo pre-shipment inspection (PSI). If there is an issue with TS1854IPT, 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 TS1854IPT part is unused and in its original packaging.
Return procedure for TS1854IPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS1854IPT Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
