My Inquiry
My Account
STMicroelectronics TSU114IQ4T
- Part No.:
- TSU114IQ4T
- Manufacturer:
- STMicroelectronics
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
TSU114IQ4T.pdf
- Description:
- IC CMOS 4 CIRCUIT 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:816
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TSU114IQ4T from STMicroelectronics is a quad-channel nanopower CMOS operational amplifier optimized for ultra-low-power sensor signal conditioning in battery-constrained systems. It delivers 900 nA typical supply current per channel, 150 µV max input offset voltage at 25 °C, rail-to-rail input/output operation across 1.5–5.5 V supply, and 3.6 µVpp low-frequency noise (0.1–10 Hz), enabling precision gas sensing and energy-harvesting wearables.
For engineers reviewing the TSU114IQ4T datasheet, TSU114IQ4T pinout, TSU114IQ4T application, or TSU114IQ4T equivalent, key selection criteria include sub-µA quiescent current stability over temperature, guaranteed 235 µV max offset across –40 to 85 °C, 11.5 kHz gain bandwidth at 5 V, 10 pA max input bias current, and DFN8 2×2 package compatibility with high-impedance electrochemical sensor interfaces.
Technical Context
The TSU114IQ4T employs complementary PMOS/NMOS input stages to achieve true rail-to-rail input common-mode range (VCC− −0.1 V to VCC+ +0.1 V) without phase reversal. Its architecture maintains stable DC accuracy-150 µV max Vio at 25 °C and 235 µV max over full temperature range-with 1.4 µV/°C drift and 76–121 dB CMRR depending on supply voltage.
AC performance is defined by a 11.5 kHz gain bandwidth product (typ. at 5 V), 2.7 V/ms slew rate, and 60° phase margin, supporting stable closed-loop operation with capacitive loads up to 60 pF. Input-referred noise is specified as 3.6 µVpp (0.1–10 Hz) and 200 nV/√Hz at 100 Hz, critical for low-frequency electrochemical trans-impedance amplifiers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current (per channel) | 900 nA typ. at 25 °C - enables >25-year operation on CR2032 coin cell |
| Input Offset Voltage | 150 µV max at 25 °C - supports high-accuracy DC-coupled sensor front-ends without calibration |
| Input Bias Current | 10 pA max at 25 °C - preserves signal integrity with >100 MΩ sensor impedances |
| Gain Bandwidth Product | 11.5 kHz typ. at 5 V - sufficient for DC–100 Hz gas sensor output filtering and amplification |
| Low-Frequency Noise | 3.6 µVpp (0.1–10 Hz) - minimizes baseline drift in potentiostat and trans-impedance configurations |
| Common-Mode Rejection | 121 dB max at 5 V - rejects supply ripple and PCB coupling in single-supply portable designs |
| ESD Robustness | 4 kV HBM - withstands handling and board-level ESD events without protection circuitry overhead |
Pinout & Package
TSU114IQ4T is housed in a thermally enhanced DFN8 2×2 mm package with exposed pad (EP), rated for 57 °C/W junction-to-ambient thermal resistance. The exposed pad may be connected to VCC− or left floating per design requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN−A) | Inverting input, Channel A | Accepts differential signal reference; high-impedance node requiring guarding in PCB layout |
| 2 (IN+ A) | Non-inverting input, Channel A | Connects to sensor output or reference; 10 pA max bias current enables direct high-Z interface |
| 3 (OUT A) | Output, Channel A | Rail-to-rail swing supports full dynamic range utilization in single-supply 1.5–5.5 V systems |
| 4 (VCC−) | Negative supply rail | Reference for all channels; EP connection improves thermal dissipation and noise immunity |
| 5 (IN−B) | Inverting input, Channel B | Independent channel input; identical specs to Channel A for multi-sensor signal chains |
| 6 (IN+ B) | Non-inverting input, Channel B | Enables dual-sensor monitoring (e.g., CO + O₂) with shared supply and ground |
| 7 (OUT B) | Output, Channel B | Provides second independent analog output; no crosstalk specified below –70 dB |
| 8 (VCC+) | Positive supply rail | Accepts 1.5–5.5 V; decoupling capacitor (10 nF) required adjacent to pin for stability |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input/output | Extends usable input common-mode range to VCC− −0.1 V / VCC+ +0.1 V and output swing to within 25 mV of rails - maximizes dynamic range in low-voltage battery systems |
| Ultra-low input bias current | 10 pA max at 25 °C - eliminates significant error in trans-impedance amplifiers using >100 MΩ feedback resistors |
| Stable nanopower operation | 900 nA per channel across 1.5–5.5 V supply - ensures consistent lifetime estimation (>25 years on CR2032) regardless of battery discharge curve |
| No phase reversal | Guaranteed behavior beyond rail inputs - prevents erroneous output transitions during sensor overrange or power-up sequencing |
| EMI robustness enhancement | 54–79 dB EMIRR at 400 MHz–2.4 GHz - mitigated further by recommended 22 pF input-to-ground capacitors for wearable RF environments |
Applications
| Gas Sensor Signal Conditioning | Energy-Harvesting Wearables |
|---|---|
Use Scenario: Amplifying nanoampere-level current outputs from electrochemical CO, O₂, and H₂S sensors in portable air quality monitors. IC Role / Device Role / Timing Role: Trans-impedance amplifier with 10 pA max input bias current and 150 µV max offset, converting sensor current to precise voltage while rejecting supply noise. Use Value: Enables <1 ppm gas detection resolution without calibration, leveraging 3.6 µVpp low-frequency noise and 11.5 kHz GBP for stable loop response. | Use Scenario: Signal conditioning for piezoelectric or thermoelectric energy harvesters powering ultra-low-duty-cycle IoT nodes. IC Role / Device Role / Timing Role: Front-end amplifier for microvolt-level harvested signals, operating continuously at 900 nA to extend battery-free operation time. Use Value: Maintains 76–121 dB CMRR across 1.5–5.5 V supply range, ensuring accurate amplification despite variable harvester output voltage. |
| Battery Current Sensing | Active RFID Tag Front-End |
Use Scenario: Monitoring self-discharge and load current in lithium coin-cell–powered medical patches and asset trackers. IC Role / Device Role / Timing Role: Precision current-sense amplifier with rail-to-rail I/O, measuring µA–mA currents via shunt resistor with minimal voltage burden. Use Value: 235 µV max offset over –40 to 85 °C ensures <0.5% full-scale error across industrial temperature range without trimming. | Use Scenario: Analog front-end for passive/active RFID tags requiring long-term tag activation from weak RF fields. IC Role / Device Role / Timing Role: Low-power op-amp in envelope detector or signal comparator stage, operating from harvested RF energy at sub-2 V. Use Value: 1.5 V minimum supply and 900 nA ICC enable reliable startup and demodulation even under marginal RF coupling conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nanopower op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TSU104IPT | Lower supply current (170 nA typ.), reduced GBP (3.5 kHz), higher Vio (250 µV max) | Better suited for ultra-long-life applications where bandwidth <1 kHz is acceptable | Select when lifetime >50 years on CR2032 is prioritized over sensor signal fidelity |
| TSZ124IPT | Higher accuracy (20 µV max Vio), higher ICC (1.8 µA), same GBP (11 kHz) | Targeted at precision instrumentation where offset dominates error budget | Choose when system-level calibration is impractical and <50 µV total offset is mandatory |
Compared with TSU104IPT, TSU114IQ4T trades 730 nA higher ICC for 8 kHz higher GBP and 100 µV lower offset-critical for responsive gas sensing. Against TSZ124IPT, it saves 900 nA/channel at the cost of 130 µV higher offset, favoring battery life over absolute precision in field-deployed sensors.
Availability
TSU114IQ4T is available at Aetrix Electronics and suitable for gas sensing, battery current monitoring, and energy-harvesting wearable applications requiring stable component supply, long-lifecycle assurance, and DFN8 2×2 mm footprint compatibility.
Supply support for TSU114IQ4T 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, specializing in power management, analog, MEMS, and microcontroller solutions for industrial, automotive, and consumer markets.
The TSU11x series was developed specifically for nanopower, high-accuracy analog signal conditioning in battery-constrained edge devices-emphasizing longevity, low-noise DC performance, and robustness in unregulated supply environments.
FAQ
What is the maximum operating temperature range for TSU114IQ4T?
The TSU114IQ4T is fully specified and guaranteed over an operating free-air temperature range of –40 °C to +85 °C. All key parameters-including input offset voltage (235 µV max), supply current (1480 nA max), and CMRR (71 dB min)-are tested and validated across this full industrial range per DS11846 Rev 6.
Can TSU114IQ4T drive capacitive loads directly?
Yes, the TSU114IQ4T is stable with capacitive loads up to 60 pF when configured with unity-gain feedback, as verified in its Bode plots (Figures 26–28). For loads exceeding 60 pF, a series isolation resistor (Riso) is recommended per Figure 30 to maintain 60° phase margin and prevent peaking or oscillation.
Is the exposed pad on the DFN8 package electrically connected?
The exposed pad on the TSU114IQ4T's DFN8 2×2 mm package is not internally connected to any die node and may be either soldered to VCC− (for improved thermal performance and noise immunity) or left floating (for simplified layout). No electrical short or functional dependency exists between the pad and internal circuitry.
Does TSU114IQ4T support true rail-to-rail input with phase reversal immunity?
Yes-TSU114IQ4T uses complementary PMOS/NMOS input pairs to achieve rail-to-rail input common-mode range (VCC− −0.1 V to VCC+ +0.1 V) and is explicitly designed to prevent phase reversal, as confirmed in Figure 18 ("Phase reversal free") and Section 5.2 of DS11846. This ensures predictable output polarity even during overvoltage transients or power sequencing.
TSU114IQ4T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.0027V/µs
- Gain Bandwidth Product:
- 11.5 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 950nA (x4 Channels)
- Current - Output / Channel:
- 45 mA
- Voltage - Supply Span (Min):
- 1.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
TSU114IQ4T FAQ
1.How can I place an order for TSU114IQ4T through Aetrix?
Please submit a Request for Quotation (RFQ) for TSU114IQ4T 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 TSU114IQ4T reliable?
The price and inventory of TSU114IQ4T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TSU114IQ4T is usually 5 days.
3.What payment methods are accepted for TSU114IQ4T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TSU114IQ4T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TSU114IQ4T?
TSU114IQ4T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TSU114IQ4T 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 TSU114IQ4T?
For technical support, including TSU114IQ4T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TSU114IQ4T requirements.
6.How does Aetrix verify that TSU114IQ4T is sourced from the original manufacturer or authorized distributors?
All TSU114IQ4T 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 TSU114IQ4T meets industry standards.
7.What is the process for return or replacement of TSU114IQ4T?
All TSU114IQ4T units undergo pre-shipment inspection (PSI). If there is an issue with TSU114IQ4T, 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 TSU114IQ4T part is unused and in its original packaging.
Return procedure for TSU114IQ4T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TSU114IQ4T 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…
