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STMicroelectronics TS1851IDT
- Part No.:
- TS1851IDT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TS1851IDT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,767
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Product details
Overview
TS1851IDT 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 at 1.8 V, delivers 530 kHz gain bandwidth product, and supports extended common-mode input range (VCC− − 0.2 V to VCC+ + 0.2 V). It is used in cellular phone audio front-ends and portable medical sensor signal conditioning.
For engineers reviewing the TS1851IDT datasheet, TS1851IDT pinout, TS1851IDT application, or TS1851IDT equivalent, this page provides verified electrical specifications, SOT23-5 package layout, real-world use cases in low-power analog signal chains, and validated alternative op-amps with documented performance trade-offs.
Technical Context
The TS1851IDT implements a CMOS input stage enabling rail-to-rail input common-mode range down to 0.2 V below VCC− and up to 0.2 V above VCC+, combined with a push-pull output stage delivering true rail-to-rail swing into 2 kΩ loads. Its 530 kHz GBP and 0.18 V/μs slew rate support stable unity-gain operation with ≥500 pF capacitive load.
It achieves 1 mV max input offset voltage (A-grade), 2 μV/°C drift, and 40 nV/√Hz input voltage noise - characteristics validated across −40 °C to +125 °C operating temperature and 1.8–6 V supply range. ESD tolerance is rated at 2 kV HBM, and latch-up immunity meets JEDEC JESD78 requirements.
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 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, active RC sensors, and audio preamplification up to ~50 kHz. |
| Input Offset Voltage (max) | 1 mV (TS1851A version) - ensures ≤0.1% gain error in 1 V full-scale instrumentation amplifier configurations. |
| Rail-to-Rail I/O | Input extends 0.2 V beyond rails; output swings within 40 mV of rails at 2 kΩ - maximizes dynamic range in low-voltage ADC driver stages. |
| Common-Mode Input Range | VCC− − 0.2 V to VCC+ + 0.2 V - supports direct sensing of signals referenced to ground or VCC in single-supply topologies. |
| Capacitive Load Drive | Stable with ≥500 pF - eliminates need for isolation resistors when driving ADC input capacitance or long PCB traces. |
Pinout & Package
The TS1851IDT is housed in a 5-pin SOT23-5 micropackage (2.8 mm × 2.9 mm footprint), optimized for space-constrained portable designs and compatible with standard pick-and-place assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | In− | Inverting input terminal - accepts differential signal pairs or feedback network connections in inverting configurations. |
| 2 | In+ | Non-inverting input terminal - connects to reference voltage, sensor output, or high-impedance signal sources. |
| 3 | VCC− | Negative supply rail (GND for single-supply use) - must be decoupled with 100 nF ceramic capacitor near pin. |
| 4 | Out | Amplifier output - drives loads ≥2 kΩ directly; supports rail-to-rail swing with <100 mV headroom at both rails. |
| 5 | VCC+ | Positive supply rail - accepts 1.8–6 V; internal ESD protection diodes clamp to rails at ±2 kV HBM. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 120 μA at 1.8 V - reduces quiescent power to 216 nW, critical for energy-harvesting and coin-cell applications. |
| Extended common-mode input range | VCC− − 0.2 V to VCC+ + 0.2 V - enables direct interfacing with 0–VCC sensors without level-shifting circuitry. |
| Rail-to-rail output swing | Within 40 mV of rails at 2 kΩ - preserves >95% of available voltage range for 12-bit ADCs with 1.8 V reference. |
| High capacitive load stability | Stable with 500 pF - eliminates external compensation in data acquisition channels with parasitic trace capacitance. |
| Low input offset voltage (A-grade) | 1 mV max - minimizes DC error in precision transducer amplifiers without requiring manual trimming or auto-zero architecture. |
Applications
| Portable Medical Sensors | Two-Cell Battery Systems |
|---|---|
|
Use Scenario: Amplifying weak bio-potential signals (ECG, EMG) from dry electrodes in wearable patches. IC Role / Device Role / Timing Role: Single-supply instrumentation amplifier front-end with rail-to-rail input to capture sub-mV signals referenced to system ground. Use Value: 120 μA quiescent current extends CR2032 battery life beyond 18 months; 1 mV offset avoids baseline drift in analog filtering stages. |
Use Scenario: Signal conditioning for thermistor-based temperature monitoring in cordless power tools. IC Role / Device Role / Timing Role: Low-voltage buffer and gain stage operating directly from 2×AA alkaline stack (2.4–3.2 V). Use Value: Rail-to-rail I/O preserves full ADC input range across battery discharge; 530 kHz GBP supports fast thermal response sampling. |
| Cellular Phone Audio | Laptop Keyboard Backlight Control |
|
Use Scenario: Microphone bias and preamplification in entry-level GSM handsets with tight BOM cost targets. IC Role / Device Role / Timing Role: Single op-amp configured as AC-coupled non-inverting amplifier with 20 dB gain and 20 Hz–20 kHz bandwidth. Use Value: 40 nV/√Hz input noise ensures SNR > 85 dB; 2 kV HBM ESD rating eliminates need for external protection diodes. |
Use Scenario: Linear LED current regulation for RGB keyboard backlighting using PWM dimming interface. IC Role / Device Role / Timing Role: Transconductance amplifier converting PWM duty cycle to precise analog current reference for LED driver ICs. Use Value: 0.18 V/μs slew rate prevents overshoot during rapid PWM transitions; 125 °C max operating temperature supports under-chassis placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power, rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6001T-I/OT (Microchip) | Lower GBP (1 MHz), higher supply current (100 μA at 1.8 V), same SOT23-5 package. | Better high-frequency response but less suitable for ultra-low-power always-on sensing due to higher noise floor (120 nV/√Hz). | Select when bandwidth >800 kHz is required and supply current <150 μA remains acceptable. |
| TLV9001IDBVR (TI) | Higher GBP (1 MHz), lower offset (0.25 mV typ), 150 μA supply current at 1.8 V, same pinout. | Superior DC precision and speed, but reduced phase margin with 500 pF loads - requires series resistor for stability. | Select for precision sensor interfaces where offset drift <0.5 μV/°C and 12-bit+ linearity are mandatory. |
Compared with MCP6001T-I/OT and TLV9001IDBVR, the TS1851IDT offers the lowest supply current at 1.8 V while maintaining adequate bandwidth and proven stability with heavy capacitive loads - making it optimal for cost-sensitive, battery-limited applications where longevity outweighs raw speed or ultra-low offset.
Availability
TS1851IDT is available at Aetrix Electronics and suitable for portable medical devices, two-cell battery-powered instrumentation, and cellular handset signal conditioning requiring stable component supply across extended temperature ranges (−40 °C to +125 °C).
Supply support for TS1851IDT 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, specializing in power management, analog, MEMS, and microcontroller solutions for industrial, automotive, and consumer markets.
The TS185x family belongs to ST's precision low-power op-amp product line, designed specifically for energy-constrained portable electronics where rail-to-rail operation, sub-2-V compatibility, and long-term reliability are essential.
FAQ
Is the TS1851IDT qualified for automotive applications?
No. The TS1851IDT is specified for industrial temperature range (−40 °C to +125 °C) but is not AEC-Q200 qualified. It lacks automotive-specific stress testing, failure reporting, and PPAP documentation. For automotive cabin modules or ADAS subsystems, ST's TSZ121 or TSV911 families are recommended alternatives with full AEC-Q100 qualification.
Can the TS1851IDT drive an ADC input directly?
Yes. Its rail-to-rail output swing (within 40 mV of rails at 2 kΩ), 530 kHz GBP, and stability with ≥500 pF capacitive loads allow direct connection to SAR and delta-sigma ADC inputs without isolation resistors. Verified performance includes <0.5 LSB gain error at 12-bit resolution with 1.8 V reference and 100 kSPS sampling.
What is the maximum capacitive load the TS1851IDT can drive without oscillation?
The TS1851IDT is guaranteed stable with up to 500 pF capacitive load under unity-gain conditions, as confirmed in Figure 32 of the datasheet (phase margin ≥60° at CL = 500 pF). Driving >500 pF requires a series isolation resistor (≥10 Ω) between output and load to maintain stability, especially when sourcing/sinking >10 mA.
Does the TS1851IDT have shutdown functionality?
No. The TS1851IDT does not include an enable/shutdown pin. Power control must be implemented externally via supply rail switching or series PMOS FET on VCC+. For applications requiring low-quiescent standby mode, consider ST's TSX561 (1.5 μA shutdown current) or TI's LPV821 (450 nA shutdown), both in SOT23-5 packages with compatible pinouts.
TS1851IDT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 8-SOIC
TS1851IDT FAQ
1.How can I place an order for TS1851IDT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS1851IDT 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 TS1851IDT reliable?
The price and inventory of TS1851IDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS1851IDT is usually 5 days.
3.What payment methods are accepted for TS1851IDT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS1851IDT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS1851IDT?
TS1851IDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS1851IDT 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 TS1851IDT?
For technical support, including TS1851IDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS1851IDT requirements.
6.How does Aetrix verify that TS1851IDT is sourced from the original manufacturer or authorized distributors?
All TS1851IDT 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 TS1851IDT meets industry standards.
7.What is the process for return or replacement of TS1851IDT?
All TS1851IDT units undergo pre-shipment inspection (PSI). If there is an issue with TS1851IDT, 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 TS1851IDT part is unused and in its original packaging.
Return procedure for TS1851IDT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TS1851IDT Tags
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LM358DT
STMicroelectronics
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LM358DR
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LM2904DR
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MCP6006UT-E/OT
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