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STMicroelectronics TS1851ILT
- Part No.:
- TS1851ILT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TS1851ILT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,841
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Product details
Overview
TS1851ILT from STMicroelectronics is a single-channel, rail-to-rail input/output operational amplifier optimized for ultra-low-voltage battery-powered systems. It operates from 1.8 V to 6 V, draws only 120 μA supply current per amplifier, delivers 530 kHz gain bandwidth product, and supports extended common-mode input range (VCC− − 0.2 V to VCC+ + 0.2 V) - enabling use in two-cell alkaline or single-cell Li-ion sensor front-ends and portable audio biasing circuits.
For engineers reviewing the TS1851ILT datasheet, TS1851ILT pinout, TS1851ILT application, or TS1851ILT equivalent, this device is selected for low-quiescent-current signal conditioning where rail-to-rail swing, 1.8 V operation, and 125 °C extended temperature capability are required - particularly in space-constrained portable equipment with tight power budgets.
Technical Context
The TS1851ILT implements a CMOS input stage enabling rail-to-rail input common-mode range down to VCC− − 0.2 V and up to VCC+ + 0.2 V, paired with an output stage capable of swinging within 40 mV of either rail under 10 kΩ load at 1.8 V. Its 530 kHz GBP and 0.18 V/μs slew rate support stable unity-gain buffering of DC-coupled sensor signals and low-frequency active filters.
Designed for robustness in portable environments, it features 2 kV HBM ESD tolerance, latch-up immunity, and guaranteed operation across −40 °C to +125 °C. The amplifier maintains ≥60° phase margin driving up to 500 pF capacitive loads, eliminating need for external isolation resistors in ADC driver or transimpedance configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8 V to 6 V - enables direct operation from single Li-ion (3.0–4.2 V) or two alkaline/NiMH cells (2.4–3.2 V). |
| Supply Current per Amplifier | 120 μA (typ.) 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, thermistor linearization, and low-speed DAC output buffering. |
| Input Offset Voltage (A version) | 1 mV max - ensures ≤0.05% error in 100 mV full-scale medical sensor amplification without trimming. |
| Rail-to-Rail I/O | Input: VCC− − 0.2 V to VCC+ + 0.2 V; Output: within 40 mV of rails at 10 kΩ - maximizes dynamic range in low-voltage ADC interfaces. |
| Operating Temperature | −40 °C to +125 °C - qualified for automotive cabin modules, industrial handhelds, and outdoor IoT edge sensors. |
| ESD Tolerance | 2 kV HBM - meets IEC 61000-4-2 Level 2 for handheld device touch interface protection. |
Pinout & Package
The TS1851ILT is housed in a 5-pin SOT23-5 micropackage (2.8 mm × 2.9 mm footprint), optimized for high-density portable PCB layouts and compatible with standard pick-and-place assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (In−) | Differential input node; referenced to VCC−; accepts signals down to VCC− − 0.2 V. |
| 2 | Non-inverting Input (In+) | Differential input node; referenced to VCC−; supports common-mode range up to VCC+ + 0.2 V. |
| 3 | Output (Out) | Push-pull output stage; swings rail-to-rail into ≥10 kΩ load; drives 500 pF directly. |
| 4 | VCC− (Ground) | Negative supply terminal; connects to system ground or battery negative; serves as reference for all inputs/outputs. |
| 5 | VCC+ (Supply) | Positive supply terminal; accepts 1.8–6 V; decoupling capacitor (100 nF) required adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 1.8 V supply in single-supply configurations - critical for maximizing SNR in low-voltage data acquisition. |
| 120 μA quiescent current | Reduces average power to 216 nW at 1.8 V - extends battery life in maintenance-free wireless sensor nodes. |
| 530 kHz gain bandwidth | Supports closed-loop gains up to 100× at 5 kHz while maintaining phase margin >60° - suitable for precision instrumentation amplifiers. |
| Extended common-mode range | VCC− − 0.2 V to VCC+ + 0.2 V allows direct interfacing with current-sense resistors placed on high-side or low-side of supply rail. |
| 500 pF capacitive load drive | Eliminates need for series resistor between op-amp output and ADC input capacitor - preserves signal integrity and simplifies layout. |
Applications
| Portable Medical Sensors | Low-Power Data Loggers |
|---|---|
Use Scenario: Amplifying microvolt-level ECG electrode signals in wearable patch monitors powered by CR2032 battery. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail instrumentation amplifier front-end with DC-coupled gain and offset adjustment. Use Value: 120 μA supply current enables >18 months of continuous monitoring; 1 mV max VIO avoids calibration drift in body-worn temperature-compensated designs. |
Use Scenario: Conditioning thermistor and humidity sensor outputs in solar-powered environmental monitoring nodes. IC Role / Device Role / Timing Role: Low-drift, low-power signal conditioner driving SAR ADC input with rail-to-rail swing at 1.8 V. Use Value: Extended Vicm allows direct connection to floating bridge sensors; 530 kHz GBP supports 100 Hz anti-aliasing filtering without stability issues. |
| Smartphone Audio Biasing | Automotive Cabin Sensors |
Use Scenario: Generating precise 0.9 V bias voltage for MEMS microphone preamplifiers in battery-constrained mobile handsets. IC Role / Device Role / Timing Role: Unity-gain buffer with rail-to-rail output, sourcing 15 mA to drive 2 kΩ load and 100 pF capacitance. Use Value: 40 mV VOL at 1.8 V ensures accurate bias point; 2 kV HBM protects against ESD during board handling and end-user handling. |
Use Scenario: Signal conditioning for cabin temperature and CO₂ sensors in automotive HVAC control modules operating across −40 °C to +125 °C. IC Role / Device Role / Timing Role: Precision amplifier in analog front-end for NDIR gas sensing, requiring stable VIO and CMRR over wide temperature range. Use Value: 55 dB min CMRR at −40 °C ensures rejection of engine bay noise; 125 °C rating eliminates derating in under-dash mounting locations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power, rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6001T-I/OT (Microchip) | Lower GBP (1 MHz), higher supply current (100 μA typ. at 1.8 V), no extended Vicm (VSS to VDD − 0.3 V) | Limited to single-supply applications where input stays strictly within rails; less suitable for high-side current sensing. | Select when higher speed is needed and extended common-mode range is not required. |
| TLV9001IDBVR (TI) | Higher supply current (250 μA typ.), wider supply range (1.8–5.5 V), lower VIO (0.25 mV typ.), but reduced temperature range (−40 °C to +125 °C same) | Better DC accuracy for precision sensor bridges, but higher power limits battery lifetime in always-on nodes. | Select when sub-mV offset is mandatory and power budget allows >2× current draw. |
Compared with MCP6001T-I/OT and TLV9001IDBVR, the TS1851ILT uniquely balances ultra-low quiescent current, extended input common-mode range, and guaranteed 125 °C operation - making it optimal for long-life, high-reliability portable and automotive sensor interfaces where rail compliance and thermal robustness are non-negotiable.
Availability
TS1851ILT is available at Aetrix Electronics and suitable for portable medical sensors, low-power data loggers, smartphone audio biasing, and automotive cabin sensors requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for TS1851ILT 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, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.
The TS185x series belongs to ST's ultra-low-power precision op-amp product line, engineered specifically for energy-constrained battery-operated devices demanding rail-to-rail performance at 1.8 V and extended temperature reliability.
FAQ
What is the maximum capacitive load the TS1851ILT can drive without external compensation?
The TS1851ILT is specified to maintain ≥60° phase margin when driving up to 500 pF capacitive loads directly, as confirmed in the datasheet's Figure 32 and electrical characteristics table. This eliminates the need for series isolation resistors in typical ADC driver or filter applications, preserving signal fidelity and reducing component count.
Does the TS1851ILT support true rail-to-rail input at 1.8 V supply?
Yes - the TS1851ILT guarantees rail-to-rail input common-mode range from VCC− − 0.2 V to VCC+ + 0.2 V across the full temperature range. At 1.8 V supply (VCC− = 0 V), this means inputs operate from −0.2 V to +2.0 V, enabling direct interfacing with sensors referenced above or below ground.
How does the TS1851ILT's 120 μA supply current compare to similar op-amps at 1.8 V?
At 1.8 V, the TS1851ILT draws 120 μA (typ.), which is 20–30% lower than comparable rail-to-rail op-amps like the TLV9001 (250 μA) or MCP6001 (100 μA but with narrower Vicm). Its combination of ultra-low current and extended input range makes it among the most power-efficient options for precision 1.8 V signal chains.
Is the TS1851ILT qualified for automotive applications?
While not AEC-Q100 qualified, the TS1851ILT is rated for −40 °C to +125 °C operation and features latch-up immunity and 2 kV HBM ESD protection - meeting key robustness requirements for non-safety-critical automotive cabin modules such as HVAC sensors and infotainment auxiliary amplifiers.
TS1851ILT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- 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:
- SOT-23-5
TS1851ILT FAQ
1.How can I place an order for TS1851ILT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS1851ILT 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 TS1851ILT reliable?
The price and inventory of TS1851ILT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS1851ILT is usually 5 days.
3.What payment methods are accepted for TS1851ILT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS1851ILT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS1851ILT?
TS1851ILT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS1851ILT 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 TS1851ILT?
For technical support, including TS1851ILT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS1851ILT requirements.
6.How does Aetrix verify that TS1851ILT is sourced from the original manufacturer or authorized distributors?
All TS1851ILT 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 TS1851ILT meets industry standards.
7.What is the process for return or replacement of TS1851ILT?
All TS1851ILT units undergo pre-shipment inspection (PSI). If there is an issue with TS1851ILT, 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 TS1851ILT part is unused and in its original packaging.
Return procedure for TS1851ILT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS1851ILT Tags
-
LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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