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Texas Instruments TLV9042IDR
- Part No.:
- TLV9042IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TLV9042IDR.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,266
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Product details
Overview
TLV9042IDR 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 - enabling precision signal conditioning in coin-cell-powered wearables and IoT sensors.
For engineers reviewing the TLV9042IDR datasheet, TLV9042IDR pinout, TLV9042IDR application, or TLV9042IDR equivalent, this page provides verified specifications, SOIC-8 package layout, real-world use cases in low-side current sensing and motion detection, and two validated alternative op-amps with documented functional and thermal trade-offs.
Technical Context
The TLV9042IDR implements a CMOS input stage with 1 pA typical input bias current and integrated RFI/EMI filtering on all inputs. Its unity-gain stable architecture supports direct connection to capacitive loads up to 100 pF without external compensation.
It operates across –40°C to +125°C with rail-to-rail output swing within 1–8 mV of either rail (depending on load and supply), and maintains ≥98 dB open-loop gain at 1.2 V supply - critical for accurate amplification in single-supply, battery-operated front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2 V to 5.5 V - enables operation from 1.5 V coin cells and Li-ion single-cell systems without LDO pre-regulation. |
| Quiescent Current | 10 µA per channel - reduces battery drain in always-on sensor nodes; total 20 µA for dual-channel operation. |
| Input Offset Voltage | ±0.6 mV (max) - ensures ≤0.12% error in 500 mV full-scale current-sense applications at room temperature. |
| Gain-Bandwidth Product | 350 kHz - supports stable closed-loop gain up to 100× at DC–3.5 kHz for ECG or PIR signal conditioning. |
| Input Bias Current | 1 pA (typ), 12 pA (max) - minimizes voltage error across high-impedance source networks (e.g., pH electrodes, photodiodes). |
| CMRR | 77 dB (min, VS = 1.2 V) - rejects common-mode noise in unshielded PCB layouts near switching regulators. |
| EMI Rejection Ratio | 70 dB at 1 GHz - suppresses RF interference from Bluetooth/Wi-Fi antennas in compact wearable PCBs. |
Pinout & Package
TLV9042IDR is housed in an 8-pin SOIC (D) package measuring 4.9 mm × 6.0 mm, with exposed pad not present. Thermal resistance RθJA is 148.3°C/W, suitable for natural-convection environments in space-constrained industrial and portable designs.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT1 | Amplifier 1 output - drives analog-to-digital converter input or filter network; rail-to-rail swing supports full dynamic range utilization. |
| 2 | IN1− | Inverting input, channel 1 - connects to feedback network in transimpedance or difference amplifier configurations. |
| 3 | IN1+ | Noninverting input, channel 1 - accepts low-level sensor signals (e.g., thermistor divider, bridge output) with minimal loading. |
| 4 | V− | Negative supply or ground reference - must be connected directly to low-impedance ground plane to maintain PSRR and stability. |
| 5 | IN2+ | Noninverting input, channel 2 - used independently for dual-path signal conditioning (e.g., temperature + humidity sensing). |
| 6 | IN2− | Inverting input, channel 2 - supports differential measurement when paired with IN2+ and matched resistors. |
| 7 | OUT2 | Amplifier 2 output - isolated from OUT1; allows simultaneous processing of two independent analog channels. |
| 8 | V+ | Positive supply - accepts 1.2–5.5 V; bypass capacitor (100 nF ceramic) required within 3 mm for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full utilization of 1.2 V supply range - output swings within 1 mV of rails at light loads, preserving SNR in low-voltage ADC interfaces. |
| Integrated EMI filtering | Rejects 1 GHz RF ingress without external LC filters - eliminates board area and cost for consumer-grade wireless coexistence. |
| No phase reversal on overdrive | Prevents latch-up or erroneous control signals when input exceeds supply - critical for robustness in unregulated battery systems. |
| 0.1 Hz–10 Hz noise | 6.5 µVPP - supports high-resolution DC-coupled measurements (e.g., strain gauge, thermopile) without post-processing filtering. |
| Unity-gain stable | Eliminates need for external compensation components - simplifies layout and reduces BOM count in cost-sensitive volume production. |
Applications
| Wearable Fitness Monitoring | Low-Side Current Sensing |
|---|---|
|
Use Scenario: Amplifying microvolt-level signals from heart rate photoplethysmography (PPG) LEDs in smartwatches. IC Role / Device Role / Timing Role: Dual-channel RRIO op-amp performing synchronous AC-coupled amplification and baseline correction. Use Value: 10 µA/channel quiescent current extends battery life beyond 7 days; 1.2 V operation enables direct coin-cell integration without voltage boosting. |
Use Scenario: Measuring motor or LED load current by amplifying voltage across a 10 mΩ shunt resistor in battery-powered tools. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with rail-to-rail output driving 12-bit SAR ADC. Use Value: ±0.6 mV offset ensures <0.5% full-scale error at 1 A load; CMRR >77 dB rejects PWM switching noise from adjacent MOSFET drivers. |
| Motion Detection (PIR) | Electronic Point-of-Sale (EPOS) |
|
Use Scenario: Conditioning weak pyroelectric sensor outputs in battery-operated occupancy sensors. IC Role / Device Role / Timing Role: Low-noise, high-input-impedance amplifier with 6.5 µVPP 0.1–10 Hz noise for DC-coupled thermal signal extraction. Use Value: 1 pA input bias current prevents signal drift across high-value feedback resistors; 350 kHz GBW supports fast transient response to human movement. |
Use Scenario: Signal conditioning for magnetic stripe reader (MSR) head outputs in handheld payment terminals. IC Role / Device Role / Timing Role: Dual-channel amplifier providing gain and filtering for analog audio-frequency MSR waveforms before digitization. Use Value: 70 dB EMI rejection ratio prevents corruption from cellular/GNSS RF; SOIC-8 package supports automated optical inspection (AOI) in high-volume SMT lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA316IDR | Higher IQ (400 µA/ch), wider GBW (10 MHz), no 1.2 V operation - requires ≥1.8 V supply. | Better for higher-speed sensor interfaces (e.g., ultrasonic distance), unsuitable for 1.5 V coin cell systems. | Select when bandwidth >1 MHz is needed and supply ≥2.0 V is available; avoid for sub-1.8 V designs. |
| LPV821DRX | Lower IQ (650 nA/ch), lower GBW (6.5 kHz), same 1.2 V min - but only single-channel, no SOIC option. | Optimized for ultra-long-life battery applications (10+ year shelf life); lacks dual-channel integration. | Choose for extreme energy harvesting or maintenance-free deployments where dual-channel functionality is unnecessary. |
Compared with TLV9042IDR, OPA316IDR trades 40× higher quiescent current for 28× greater bandwidth and improved AC performance, while LPV821DRX sacrifices channel count and speed to achieve nanoamp-level power - making TLV9042IDR the balanced choice for dual-channel, 1.2 V–5.5 V, sub-10 µA precision amplification.
Availability
TLV9042IDR is available at Aetrix Electronics and suitable for wearable electronics, building automation sensors, and electronic point-of-sale terminals requiring stable component supply across multi-year production cycles.
Supply support for TLV9042IDR 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-powered IoT endpoints and wearables - prioritizing 1.2 V operability, nanoamp quiescent current, and integrated EMI resilience without sacrificing DC accuracy.
FAQ
What is the minimum supply voltage for reliable operation of TLV9042IDR?
The TLV9042IDR is fully specified down to 1.2 V supply voltage across –40°C to +125°C, with guaranteed parameters including 10 µA quiescent current, ±0.6 mV input offset, and 350 kHz gain-bandwidth. Operation below 1.2 V is not characterized and may result in undefined behavior or failure to meet datasheet limits.
Does TLV9042IDR support rail-to-rail output swing at 1.2 V supply?
Yes - TLV9042IDR delivers rail-to-rail output swing at 1.2 V supply, with positive rail headroom as low as 0.75 mV and negative rail headroom of 0.75 mV (tested at RL = 100 kΩ to VS/2). This enables maximum dynamic range utilization in ultra-low-voltage data acquisition systems.
Can TLV9042IDR drive capacitive loads without oscillation?
Yes - TLV9042IDR is unity-gain stable and robustly drives up to 100 pF of capacitive load without external isolation resistors. Phase margin remains ≥65° at CL = 10 pF and improves with increasing capacitance up to 100 pF, as confirmed in Figure 6-31 of the datasheet.
Is TLV9042IDR pin-compatible with other dual op-amps in SOIC-8 packages?
No - TLV9042IDR uses a non-standard SOIC-8 pinout (OUT1, IN1−, IN1+, V−, IN2+, IN2−, OUT2, V+) that differs from industry-standard dual op-amps like LM358 or TL072. PCB layout must follow TI's pin mapping; direct replacement requires schematic and layout revision.
What is the ESD rating of TLV9042IDR?
TLV9042IDR has a Human-Body Model (HBM) ESD rating of ±3000 V and Charged-Device Model (CDM) rating of ±1500 V, per ANSI/ESDA/JEDEC JS-001 and JS-002 standards. These ratings meet IPC-7351B handling requirements for automated SMT assembly in Class 0–1 ESD environments.
TLV9042IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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-SOIC
TLV9042IDR FAQ
1.How can I place an order for TLV9042IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLV9042IDR 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 TLV9042IDR reliable?
The price and inventory of TLV9042IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLV9042IDR is usually 5 days.
3.What payment methods are accepted for TLV9042IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLV9042IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLV9042IDR?
TLV9042IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLV9042IDR 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 TLV9042IDR?
For technical support, including TLV9042IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLV9042IDR requirements.
6.How does Aetrix verify that TLV9042IDR is sourced from the original manufacturer or authorized distributors?
All TLV9042IDR 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 TLV9042IDR meets industry standards.
7.What is the process for return or replacement of TLV9042IDR?
All TLV9042IDR units undergo pre-shipment inspection (PSI). If there is an issue with TLV9042IDR, 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 TLV9042IDR part is unused and in its original packaging.
Return procedure for TLV9042IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLV9042IDR Tags
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LM358DT
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