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STMicroelectronics TS27L4ACPT
- Part No.:
- TS27L4ACPT
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TS27L4ACPT.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,079
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Product details
Overview
TS27L4ACPT from STMicroelectronics is a very low power precision CMOS quad operational amplifier with 10 µA/op supply current, 0.9 mV max input offset voltage (at 25°C), rail-to-ground output swing, unity-gain stability, and 0.1 MHz gain-bandwidth product - used in battery-powered sensor signal conditioning and portable medical instrumentation.
For engineers reviewing the TS27L4ACPT datasheet, TS27L4ACPT pinout, TS27L4ACPT application, or TS27L4ACPT equivalent, this device is selected for ultra-low-quiescent-current analog front-ends where input bias current <1 pA and thermal drift <2 µV/°C are critical to DC accuracy over temperature.
Technical Context
The TS27L4ACPT implements a four-channel CMOS op-amp architecture using ST's silicon gate process, delivering high input impedance (>10¹² Ω) and sub-picoampere input bias current at 25°C. Its internal compensation ensures unity-gain stability with capacitive loads up to 100 pF while maintaining ≥45° phase margin.
It operates from single supplies (3–16 V) or split supplies, supports common-mode input range from ground to VCC–1.5 V, and features rail-to-ground output capability - enabling direct interfacing with low-voltage ADCs and microcontroller inputs without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply current per amp | 10 µA typ - enables multi-year operation on coin-cell batteries in always-on sensing nodes |
| Input offset voltage | 0.9 mV max (TS27L4AC grade) - ensures ≤0.9 mV DC error in precision transducer amplification |
| Input bias current | 1 pA typ at 25°C - minimizes voltage drop across high-impedance pH or photodiode sources |
| Gain-bandwidth product | 0.1 MHz - sufficient for DC–10 kHz sensor signal amplification with stable closed-loop response |
| Common-mode rejection | 80 dB min - rejects noise from shared supply rails in multi-channel data acquisition |
| Output voltage swing | 0 V to VCC–1.5 V - delivers full dynamic range into 12-bit SAR ADCs referenced to same supply |
| Phase margin | 45° min at unity gain - guarantees stable operation driving 100 pF capacitive loads (e.g., long PCB traces) |
Pinout & Package
TSSOP14 (Thin Shrink Small Outline Package), 4.9–5.1 mm × 6.2–6.6 mm footprint, 0.65 mm pitch, 1.2 mm max height - optimized for space-constrained portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting input (Amp 1) | Accepts differential signal input; high-Z node requiring guarded layout for <1 pA leakage |
| 2 | Non-inverting input (Amp 1) | DC-coupled reference or sensor connection point; common-mode range extends to ground |
| 3 | Output (Amp 1) | Rail-to-ground capable output; drives 1 MΩ load with ≤50 mV low-level saturation |
| 4 | Ground (V−) | Reference return for all four amplifiers; must be low-impedance path to avoid crosstalk |
| 5 | Inverting input (Amp 2) | Independent channel input; electrically isolated from Amp 1 except via shared supply pins |
| 6 | Non-inverting input (Amp 2) | Supports dual-sensor differential pair configuration with matched trace routing |
| 7 | Output (Amp 2) | Capable of sourcing 45 mA sink / 60 mA source - suitable for driving LED indicators or small FET gates |
| 8 | VCC+ | Positive supply rail (3–16 V); decoupling capacitor required within 5 mm for stability |
| 9 | Inverting input (Amp 3) | Third channel input; shares same CMOS input stage topology as Pins 1 and 5 |
| 10 | Non-inverting input (Amp 3) | Enables three-channel simultaneous measurement (e.g., ECG lead I/II/III) |
| 11 | Output (Amp 3) | Delivers 0.04 V/µs slew rate - adequate for <10 kHz bio-signal amplification |
| 12 | Inverting input (Amp 4) | Fourth independent input; usable as comparator with hysteresis when open-loop |
| 13 | Non-inverting input (Amp 4) | Configurable as reference buffer; low drift supports stable threshold generation |
| 14 | Output (Amp 4) | Provides final-stage gain or active filtering before ADC sampling |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 10 µA per amplifier enables >10-year battery life in wireless sensor nodes powered by CR2032 |
| Input offset voltage selection | TS27L4AC grade offers 0.9 mV max (vs. 1.1 mV for standard TS27L4C), reducing calibration overhead |
| Rail-to-ground output | Eliminates need for negative supply in single-supply systems interfacing with 0–3.3 V microcontrollers |
| Capacitive load stability | Guaranteed phase margin ≥45° with 100 pF load - supports direct connection to long flex-cable traces |
| Low input current drift | <2 µV/°C offset drift and <100 pA bias current drift over –40°C to +125°C ensure field-deployed accuracy |
Applications
| Portable ECG Monitor | Smart Gas Sensor Module |
|---|---|
|
Use Scenario: Amplifying microvolt-level biopotential signals from dry electrodes in handheld cardiac screening devices. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with selectable gain and DC-coupled input for baseline preservation. Use Value: 1 pA input bias prevents electrode polarization errors; rail-to-ground output matches 0–3.3 V ADC input range without level shifters. |
Use Scenario: Conditioning output from electrochemical CO sensors with high source impedance (>100 MΩ). IC Role / Device Role / Timing Role: Transimpedance amplifier converting nanoamp sensor current to voltage with minimal loading error. Use Value: Sub-picoampere input bias avoids signal attenuation; 0.9 mV offset limits zero-point calibration frequency to once-per-field-deployment. |
| Wireless Temperature Node | Low-Power pH Meter |
|
Use Scenario: Signal conditioning for thermistor bridges in battery-operated IoT temperature loggers. IC Role / Device Role / Timing Role: Precision difference amplifier rejecting common-mode noise on long sensor cables. Use Value: 80 dB CMRR suppresses 50/60 Hz pickup; 10 µA quiescent current extends 5-year battery life under 1-sample/hour duty cycle. |
Use Scenario: High-impedance buffer for glass pH electrodes in handheld water quality testers. IC Role / Device Role / Timing Role: Unity-gain follower isolating electrode from ADC input capacitance and noise. Use Value: >10¹² Ω input impedance prevents electrode polarization; 2 µV/°C drift maintains ±0.02 pH accuracy over 0–50°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad low-power op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2464IDR | Higher supply current (230 µA/op), wider GBW (6.4 MHz), but input bias current 1 nA - 1000× higher than TS27L4ACPT | Suitable for higher-speed sensor interfaces (e.g., ultrasonic TOF), not ultra-low-IQ designs | Select when bandwidth >100 kHz is required and battery life is secondary to signal fidelity |
| LP324DR | Bipolar input stage, 100 nA input bias current, 100 µA/op supply - lacks rail-to-ground output and precision offset spec | Acceptable for cost-sensitive industrial controls where DC accuracy is relaxed | Choose only for non-battery applications with ample supply headroom and no sub-mV DC error budget |
Compared with TLV2464IDR and LP324DR, the TS27L4ACPT uniquely combines sub-picoampere input bias, rail-to-ground output, and 10 µA quiescent current - making it irreplaceable in multi-year battery-powered precision analog front-ends where leakage and offset drift dominate error budgets.
Availability
TS27L4ACPT is available at Aetrix Electronics and suitable for portable medical devices, environmental sensor nodes, handheld test equipment, and low-power industrial monitoring systems requiring stable component supply across extended product lifecycles.
Supply support for TS27L4ACPT 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.
The TS27L4 series belongs to ST's precision analog portfolio, engineered specifically for ultra-low-power signal conditioning in battery-constrained applications where input bias current, offset voltage, and supply current define system-level accuracy and runtime.
FAQ
What is the maximum supply voltage for TS27L4ACPT?
The absolute maximum supply voltage is 18 V, but the recommended operating range is 3 V to 16 V. Operation above 16 V risks exceeding safe junction temperature under load and violates the specified electrical characteristics in Table 2. For battery-powered designs, 3.3 V or 5 V supplies are typical to minimize power consumption while preserving output swing.
Does TS27L4ACPT support rail-to-rail input?
No - the common-mode input voltage range is specified as 0 V to VCC–1.5 V, meaning the input cannot swing fully to the positive rail. However, it does support rail-to-ground input and output, allowing full utilization of the lower end of the supply range, which is essential for single-supply systems interfacing with microcontrollers.
Can TS27L4ACPT drive capacitive loads without oscillation?
Yes - the device is unity-gain stable and guarantees ≥45° phase margin with up to 100 pF capacitive load, as confirmed in Figure 12 of the datasheet. This allows direct connection to ADC input capacitors, long PCB traces, or cable-driven outputs without external isolation resistors.
How does the TS27L4AC grade differ from TS27L4C?
The TS27L4AC grade specifies tighter input offset voltage: 0.9 mV max (vs. 1.1 mV for TS27L4C) at 25°C, with identical supply current, bias current, and temperature range. This reduces initial calibration burden in precision applications like medical sensors or calibrated instrumentation where sub-millivolt DC accuracy is mandatory.
TS27L4ACPT 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:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 0.04V/µs
- Gain Bandwidth Product:
- 100 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 900 µV
- Current - Supply:
- 10µA (x4 Channels)
- Current - Output / Channel:
- 45 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
TS27L4ACPT FAQ
1.How can I place an order for TS27L4ACPT through Aetrix?
Please submit a Request for Quotation (RFQ) for TS27L4ACPT 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 TS27L4ACPT reliable?
The price and inventory of TS27L4ACPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS27L4ACPT is usually 5 days.
3.What payment methods are accepted for TS27L4ACPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS27L4ACPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TS27L4ACPT?
TS27L4ACPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TS27L4ACPT 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 TS27L4ACPT?
For technical support, including TS27L4ACPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS27L4ACPT requirements.
6.How does Aetrix verify that TS27L4ACPT is sourced from the original manufacturer or authorized distributors?
All TS27L4ACPT 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 TS27L4ACPT meets industry standards.
7.What is the process for return or replacement of TS27L4ACPT?
All TS27L4ACPT units undergo pre-shipment inspection (PSI). If there is an issue with TS27L4ACPT, 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 TS27L4ACPT part is unused and in its original packaging.
Return procedure for TS27L4ACPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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