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Texas Instruments TLV9042IDSGR
- Part No.:
- TLV9042IDSGR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
TLV9042IDSGR.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:20,828
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Product details
Overview
TLV9042IDSGR from Texas Instruments is a dual-channel, rail-to-rail input/output (RRIO), ultra-low-voltage operational amplifier optimized for power-constrained systems. It operates from 1.2 V to 5.5 V supply, draws only 10 µA per channel, features ±0.6 mV max input offset voltage, and delivers 350 kHz gain-bandwidth product - enabling precision signal conditioning in coin-cell-powered wearables and IoT sensors.
For engineers reviewing the TLV9042IDSGR datasheet, TLV9042IDSGR pinout, TLV9042IDSGR application, or TLV9042IDSGR equivalent, this page provides verified electrical specifications, WSON-8 package layout, real-world use cases in low-side current sensing and motion detection, and validated alternative op-amps with documented performance trade-offs.
Technical Context
The TLV9042IDSGR implements a CMOS input stage with 1 pA typical input bias current and integrated RFI/EMI filtering on all input pins, supporting robust operation in noisy portable environments. Its unity-gain stability and ability to drive 100 pF capacitive loads simplify PCB layout without external compensation.
Designed for single-supply operation down to 1.2 V, it maintains rail-to-rail input common-mode range (V– to V+) and output swing within 1–8 mV of rails under load - critical for maximizing dynamic range in 1.5 V battery systems like earbuds and PIR motion detectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2 V to 5.5 V - enables direct operation from 1.5 V coin cells and Li-ion/Li-po single-cell batteries without regulation. |
| Quiescent Current | 10 µA per channel - reduces total system standby power to sub-20 µA for dual-channel sensing nodes. |
| Input Offset Voltage | ±0.6 mV (max) - supports accurate DC-coupled amplification in low-side current-sensing circuits with <1% error at 100 mV sense voltage. |
| Gain-Bandwidth Product | 350 kHz - sufficient for anti-aliasing filtering and sensor signal conditioning up to ~35 kHz with unity gain. |
| Input Bias Current | 1 pA typical - minimizes voltage error across high-impedance source networks (e.g., thermistors, pH electrodes). |
| EMI Rejection Ratio | 70 dB at 1 GHz - suppresses RF interference from Bluetooth/Wi-Fi radios in wearable headsets and EPOS terminals. |
| Operating Temperature | –40°C to +125°C - qualified for industrial building automation and automotive cabin ambient sensor applications. |
Pinout & Package
TLV9042IDSGR is housed in an 8-pin WSON package (DSG) measuring 2 mm × 2 mm with exposed thermal pad connected to V–. This leadless, space-saving package supports high-density layouts in compact wearables and sensor modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Output, Channel 1 | Amplified output signal referenced to V–; rail-to-rail swing supports full utilization of low-voltage ADC inputs. |
| 2 (IN1–) | Inverting Input, Channel 1 | Differential input node; 1 pA bias current allows use with MΩ-level feedback networks without significant error. |
| 3 (IN1+) | Noninverting Input, Channel 1 | High-impedance input (100 GΩ || 0.5 pF); compatible with high-Z sensors and filtered EMI-sensitive traces. |
| 4 (V–) | Negative Supply / Ground | Reference node for both channels; exposed thermal pad must be soldered to PCB ground plane for thermal and EMI performance. |
| 5 (IN2+) | Noninverting Input, Channel 2 | Independent input for second signal path; no crosstalk due to internal isolation and layout symmetry. |
| 6 (IN2–) | Inverting Input, Channel 2 | Matches IN1– specs; enables dual independent amplifiers in single footprint (e.g., differential pair + reference buffer). |
| 7 (OUT2) | Output, Channel 2 | Second rail-to-rail output; supports simultaneous processing of two analog signals (e.g., X/Y axis motion detection). |
| 8 (V+) | Positive Supply | Single positive rail input; eliminates need for split supplies in battery-powered systems. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full-scale signal swing from 1.2 V supply - maximizes SNR in 12-bit ADC interfaces without level-shifting. |
| Integrated EMI Filter | Reduces susceptibility to 900 MHz–2.4 GHz RF noise - eliminates external RC filters in Bluetooth headset microphone preamps. |
| No Phase Reversal | Prevents output latch-up during input overdrive - ensures safe operation in unidirectional current-sense circuits with transient surges. |
| 100 pF Capacitive Load Drive | Stable operation into ADC input capacitance or long PCB traces - avoids instability without series resistance or isolation buffers. |
| Low 0.1–10 Hz Noise | 6.5 µVP-P - critical for DC-stable amplification of slow-varying biosignals (e.g., skin conductance in fitness monitors). |
Applications
| Wearable Fitness Monitor | Low-Side Current Sensing |
|---|---|
|
Use Scenario: Amplifying microvolt-level signals from photoplethysmography (PPG) LEDs and ambient light rejection photodiodes in smartwatches. IC Role / Device Role: Dual-channel RRIO amplifier conditioning analog front-end signals before 12-bit SAR ADC sampling. Use Value: 10 µA/channel quiescent current extends battery life beyond 7 days; 1.2 V operation matches coin-cell discharge curve. |
Use Scenario: Measuring load current in battery management systems by amplifying voltage across a 10 mΩ shunt resistor. IC Role / Device Role: Precision noninverting amplifier with ±0.6 mV offset, referenced to ground (low-side configuration). Use Value: Rail-to-rail output delivers full 0–1.2 V range to MCU ADC; 1 pA input bias prevents shunt error at µA-level currents. |
| Motion Detector (PIR) | Headset Microphone Preamp |
|
Use Scenario: Amplifying weak pyroelectric sensor outputs in battery-powered occupancy sensors with wake-on-motion capability. IC Role / Device Role: High-input-impedance, low-noise amplifier stage preceding window comparator and microcontroller wake logic. Use Value: 6.5 µVP-P 0.1–10 Hz noise ensures reliable detection of slow thermal transients; 125°C rating supports attic/wall-mount deployment. |
Use Scenario: Boosting electret microphone output in wireless earbuds before Bluetooth audio codec processing. IC Role / Device Role: Single-supply, EMI-hardened preamplifier with integrated RF filtering on IN+ and IN– pins. Use Value: 70 dB EMI rejection ratio suppresses 2.4 GHz interference from co-located BT radio; 350 kHz GBW supports flat response up to 20 kHz audio band. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-power operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV9002IDSGR | Higher quiescent current (60 µA/ch), lower GBW (1 MHz), no integrated EMI filter. | Better AC performance but unsuitable for <20 µA ultra-low-power nodes; requires external EMI filtering in RF-dense environments. | Select when higher bandwidth is needed and system power budget allows >5× higher IQ. |
| LPV821DRXT | Lower IQ (650 nA/ch), lower GBW (6.5 kHz), no rail-to-rail output (clips 200 mV from rail). | Superior battery life in always-on sensor nodes, but insufficient for audio or fast-settling applications. | Select for nanowatt-sensor hubs where bandwidth <10 kHz and rail-to-rail output are not required. |
Compared with TLV9042IDSGR, TLV9002IDSGR trades 6× higher supply current for 3× greater bandwidth and less precise DC specs, while LPV821DRXT achieves 15× lower IQ at the cost of usable output swing and frequency response - making TLV9042IDSGR the balanced choice for 1.2–5.5 V systems needing precision, speed, and EMI resilience.
Availability
TLV9042IDSGR is available at Aetrix Electronics and suitable for wearable electronics, building automation sensors, and portable medical devices requiring stable component supply across extended production lifecycles.
Supply support for TLV9042IDSGR 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision amplifiers and low-power design.
The TLV904x family was engineered specifically for battery-operated IoT endpoints and wearables, prioritizing ultra-low supply voltage operation (down to 1.2 V), micropower consumption, and integrated noise/EMI mitigation - not general-purpose amplification.
FAQ
What is the minimum operating voltage for TLV9042IDSGR?
The TLV9042IDSGR operates from a minimum supply voltage of 1.2 V, enabling direct compatibility with 1.5 V alkaline or lithium coin cells across their full discharge curve. This specification is guaranteed over the full –40°C to +125°C temperature range and is validated per TI's SBOS836H datasheet Section 6.3.
Does TLV9042IDSGR support rail-to-rail output swing at 1.2 V supply?
Yes, TLV9042IDSGR delivers rail-to-rail output swing even at 1.2 V supply, with typical headroom of 0.75 mV from each rail into 100 kΩ load. This is confirmed in Section 6.7 "Output" of the datasheet, ensuring maximum dynamic range for low-voltage ADCs without external level-shifting circuitry.
Is the exposed thermal pad on TLV9042IDSGR's WSON package required to be connected?
Yes, the exposed thermal pad on TLV9042IDSGR must be soldered to the PCB's V– (ground) plane. Per Section 7.3.11 and Figure 5-7 of the datasheet, this connection is essential for thermal dissipation, EMI suppression, and achieving specified junction-to-board thermal resistance (66.0°C/W).
Can TLV9042IDSGR drive a 100 pF capacitive load stably?
Yes, TLV9042IDSGR is characterized to robustly drive 100 pF capacitive loads without oscillation or excessive overshoot, as stated in its Features list and verified in Figure 6-29 and Figure 6-31 (Phase Margin vs Capacitive Load). No external isolation resistor is required for stability.
What is the input bias current specification for TLV9042IDSGR?
TLV9042IDSGR has a typical input bias current of 1 pA and a maximum of 12 pA over temperature (–40°C to +125°C), as specified in Section 6.7 "Input Bias Current". This ultra-low value enables high-precision amplification of signals from high-impedance sources such as thermistors, pH electrodes, and piezoelectric sensors.
TLV9042IDSGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.2V/µs
- Gain Bandwidth Product:
- 350 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 pA
- Voltage - Input Offset:
- 400 µV
- Current - Supply:
- 10µA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 1.2 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (2x2)
TLV9042IDSGR FAQ
1.How can I place an order for TLV9042IDSGR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV9042IDSGR 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 TLV9042IDSGR reliable?
The price and inventory of TLV9042IDSGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV9042IDSGR is usually 5 days.
3.What payment methods are accepted for TLV9042IDSGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV9042IDSGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV9042IDSGR?
TLV9042IDSGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV9042IDSGR 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 TLV9042IDSGR?
For technical support, including TLV9042IDSGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV9042IDSGR requirements.
6.How does Aetrix verify that TLV9042IDSGR is sourced from the original manufacturer or authorized distributors?
All TLV9042IDSGR 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 TLV9042IDSGR meets industry standards.
7.What is the process for return or replacement of TLV9042IDSGR?
All TLV9042IDSGR units undergo pre-shipment inspection (PSI). If there is an issue with TLV9042IDSGR, 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 TLV9042IDSGR part is unused and in its original packaging.
Return procedure for TLV9042IDSGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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