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Texas Instruments OPA2835IRUNT
- Part No.:
- OPA2835IRUNT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-WFQFN
- Datasheet:
-
OPA2835IRUNT.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 10WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:781
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Product details
Overview
OPA2835IRUNT from Texas Instruments is a dual ultra-low-power, rail-to-rail output, negative-rail input voltage-feedback operational amplifier in a 10-pin UQFN package (2.00 mm × 2.00 mm). It delivers 56 MHz bandwidth, 160 V/µs slew rate, and 250 µA/ch quiescent current at 5 V supply, enabling high-speed signal conditioning in battery-powered portable systems.
For engineers reviewing the OPA2835IRUNT datasheet, OPA2835IRUNT pinout, OPA2835IRUNT application, or OPA2835IRUNT equivalent, key selection criteria include its 250 µA/ch power consumption, –40°C to +125°C operating range, rail-to-rail output swing, –0.2 V to 3.9 V input voltage range (5-V supply), and dual-channel architecture with independent power-down pins.
Technical Context
The OPA2835IRUNT implements a voltage-feedback (VFB) architecture optimized for low-power, high-frequency operation. Its dual-channel design features independent power-down control (PD1/PD2), enabling selective channel shutdown without affecting the other amplifier - critical for dynamic power management in portable instrumentation.
It supports single-supply operation from 2.5 V to 5.5 V and achieves 55 ns settling time (0.1%) with 2 VSTEP, 113 dB CMRR, and 9.3 nV/√Hz input voltage noise at 100 kHz - balancing precision, speed, and efficiency in compact, thermally constrained layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 56 MHz at AV = 1 V/V - enables accurate amplification of signals up to ~35 MHz fundamental frequency in unity-gain stable configuration. |
| Slew Rate | 160 V/µs - supports clean reproduction of fast 2-V step signals with 10 ns rise time, minimizing distortion in pulse and video applications. |
| Quiescent Current | 250 µA per channel - allows continuous operation for >1 year on a single CR2032 coin cell in always-on sensor front-ends. |
| Input Voltage Range | –0.2 V to 3.9 V (5-V supply) - accepts inputs below ground and up to within 100 mV of positive rail, simplifying level-shifting in mixed-signal interfaces. |
| Output Drive | ±40 mA - drives 50-Ω transmission lines or 100-Ω ADC input networks directly without external buffers. |
| Operating Temp | –40°C to +125°C - qualified for automotive cabin electronics, industrial motor controllers, and downhole sensing environments. |
| THD + Noise | –130 dBc THD and –116.4 dBc SNR at 1 kHz - meets audio-grade line-driver and high-resolution SAR ADC buffer requirements. |
Pinout & Package
OPA2835IRUNT is housed in a 10-pin UQFN package (2.00 mm × 2.00 mm, 0.4 mm pitch) with wettable flanks for automated optical inspection. Thermal resistance RθJA is 143.2°C/W, supporting operation at full performance in space-constrained PCBs without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1– | Inverting input, Channel 1 | Accepts differential or single-ended signals; common-mode range extends 0.2 V below VS–. |
| VIN1+ | Noninverting input, Channel 1 | High-impedance node (250 MΩ || pF); used for precision gain-setting or reference biasing. |
| VOUT1 | Output, Channel 1 | Rail-to-rail capable: swings within 20 mV of VS– and 50 mV of VS+ under 10-mA load. |
| VS– | Negative supply | Supports true negative-rail input operation; may be grounded in single-supply configurations. |
| VIN2+ | Noninverting input, Channel 2 | Electrically isolated from Channel 1; crosstalk < –120 dB at 10 kHz ensures independent signal paths. |
| VIN2– | Inverting input, Channel 2 | Matches Channel 1 electrical characteristics; enables matched dual-path filtering or differential drive. |
| VOUT2 | Output, Channel 2 | Independent output stage; no shared internal nodes with Channel 1 improves PSRR and transient isolation. |
| VS+ | Positive supply | Operates from 2.5 V to 5.5 V; PSRR > 105 dB minimizes supply ripple coupling into output. |
| PD1 | Power-down control, Channel 1 | Active-low logic input; pulls quiescent current to 0.5 µA when driven ≤0.7 V (VS– + 0.7 V). |
| PD2 | Power-down control, Channel 2 | Independent enable/disable; allows asymmetric power states (e.g., Channel 1 active, Channel 2 asleep). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 250 µA per channel enables multi-year battery life in always-on portable medical sensors and IoT edge nodes. |
| Independent channel power-down | Dual PD1/PD2 pins allow dynamic reconfiguration - e.g., one channel buffers an ADC while the other sleeps, reducing system power by 50%. |
| Rail-to-rail output with wide input range | –0.2 V to 3.9 V input and rail-swing output preserve signal headroom in 3.3-V and 5-V systems without level-shifting circuitry. |
| High-speed precision | 56 MHz bandwidth + 113 dB CMRR + 9.3 nV/√Hz noise enables 16-bit+ SAR ADC driving with < 0.00003% THD at 1 kHz. |
| Extended temperature operation | –40°C to +125°C qualification supports deployment in engine control units, industrial PLC I/O modules, and outdoor metering hardware. |
Applications
| Audio ADC Input Buffer | Low-Power SAR ADC Driver |
|---|---|
Use Scenario: Driving the analog input of a 24-bit audio ADC in a battery-powered voice recorder or hearing aid. IC Role / Device Role / Timing Role: Precision buffer isolating microphone preamp from ADC sampling transients; provides low-noise, low-THD signal conditioning. Use Value: –130 dBc THD and –116.4 dBc SNR preserve dynamic range; 250 µA/ch current extends battery runtime beyond 100 hours on a 200-mAh Li-ion cell. | Use Scenario: Conditioning sensor outputs (e.g., pressure, temperature) before digitization by a 1 MSPS SAR ADC in a handheld test instrument. IC Role / Device Role / Timing Role: High-fidelity driver ensuring < 0.1% settling in < 55 ns, matching ADC aperture time and minimizing code-dependent errors. Use Value: 55 ns (0.1%) settling time and 160 V/µs slew rate eliminate acquisition-time bottlenecks; rail-to-rail output maximizes ADC utilization across full supply range. |
| Ultrasonic Flow Meter | Portable System Signal Chain |
Use Scenario: Amplifying echo pulses (200–500 kHz) from piezoelectric transducers in battery-operated water/gas flow meters. IC Role / Device Role / Timing Role: Low-noise, high-bandwidth receiver amplifier with fast overdrive recovery (200 ns) to handle transmit-receive switching artifacts. Use Value: 200 ns overdrive recovery prevents pulse masking after high-voltage transmit bursts; 56 MHz bandwidth preserves ultrasonic pulse fidelity for time-of-flight accuracy. | Use Scenario: Dual-channel signal path in a portable oscilloscope front-end: one channel for DC-coupled probe input, the other for AC-coupled trigger path. IC Role / Device Role / Timing Role: Dual op-amp providing simultaneous high-speed amplification and independent power management for subsystem optimization. Use Value: Independent PD1/PD2 pins reduce total system current by disabling unused channels; 2.00 mm × 2.00 mm UQFN footprint saves >60% board area vs. SOIC-8 alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-power high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2836IDGSR | Higher bandwidth (205 MHz), higher quiescent current (1 mA/ch), same 10-pin VSSOP/UQFN package options. | Better suited for >100-MHz signal chains where power budget allows; not optimal for sub-500-µA ultra-low-power designs. | Select OPA2836IDGSR only when bandwidth >100 MHz is required and 4× higher supply current is acceptable. |
| LMH6619MMX/NOPB | Wider supply range (2.7–12.6 V), higher output drive (±75 mA), but 1.25 mA/ch quiescent current and no power-down feature. | Preferred for industrial analog front-ends needing high-voltage compliance or heavy capacitive loads; lacks sleep mode for portable use. | Choose LMH6619MMX/NOPB for 10-V systems or high-current loads; avoid when battery life or dynamic power scaling is critical. |
Compared with OPA2836IDGSR and LMH6619MMX/NOPB, the OPA2835IRUNT uniquely balances 56 MHz bandwidth with 250 µA/ch consumption and dual independent power-down - making it the only option among the three qualified for continuous operation in energy-harvesting or coin-cell-powered devices requiring microamp-level standby current and high-speed precision.
Availability
OPA2835IRUNT is available at Aetrix Electronics and suitable for portable systems, ultrasonic flow meters, low-power SAR ADC drivers, and high-density industrial sensor interfaces requiring stable component supply and long-term lifecycle support.
Supply support for OPA2835IRUNT 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 solutions, with decades of expertise in high-performance op-amps and precision signal-chain components.
The OPAx835 family was designed specifically for battery-powered, space-constrained applications demanding both high speed and ultra-low power - targeting portable instrumentation, medical wearables, and energy-efficient industrial sensing.
FAQ
What is the maximum supply voltage for OPA2835IRUNT?
The OPA2835IRUNT supports a supply voltage range of 2.5 V to 5.5 V on VS+ relative to VS–. Absolute maximum rating is 5.5 V across VS+ to VS–; operation above this risks permanent damage. At 5.5 V, quiescent current remains within specification (≤345 µA/ch over temperature), and all AC/DC parameters retain datasheet compliance.
Does OPA2835IRUNT support true rail-to-rail input?
No, the OPA2835IRUNT is a negative-rail input (NRI), rail-to-rail output (RRO) amplifier. Its input common-mode range extends to –0.2 V (below VS–) and up to 3.9 V with a 5-V supply, but does not reach the positive rail. This NRI architecture enables robust operation near ground in single-supply systems while maintaining low input bias current and high CMRR.
How does the power-down function work on OPA2835IRUNT?
The OPA2835IRUNT features two independent power-down pins: PD1 controls Channel 1 and PD2 controls Channel 2. Driving either pin low (≤0.7 V referenced to VS–) reduces that channel's quiescent current to 0.5 µA typical. Both pins must be actively driven - floating or high-impedance states are undefined. Turnon delay is 250 ns; turnoff delay is 50 ns.
What is the thermal performance of the OPA2835IRUNT UQFN package?
The OPA2835IRUNT in UQFN (RMC) package has a junction-to-ambient thermal resistance (RθJA) of 143.2°C/W and junction-to-board (RθJB) of 61.9°C/W. With standard 2-layer PCB layout (2 cm² copper pour under exposed pad), it sustains full 56 MHz operation at +85°C ambient without derating. The exposed thermal pad must be soldered to PCB ground plane for rated performance.
Can OPA2835IRUNT drive a 50-Ω load directly?
Yes, the OPA2835IRUNT delivers ±40 mA output current and maintains 56 MHz bandwidth into 100-Ω loads. While it can source/sink 40 mA, sustained 50-Ω driving (e.g., 2 VPP into 50 Ω = 40 mA peak) causes ~10°C junction rise at +25°C ambient. For continuous 50-Ω operation, limit output swing to ≤1.5 VPP or add series termination to reduce current demand and maintain stability.
OPA2835IRUNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- Differential, Rail-to-Rail
- Slew Rate:
- 160V/µs
- Gain Bandwidth Product:
- 31 MHz
- -3db Bandwidth:
- 3.1 MHz
- Current - Input Bias:
- 200 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 250µA (x2 Channels)
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WQFN (2x2)
OPA2835IRUNT FAQ
1.How can I place an order for OPA2835IRUNT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2835IRUNT 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 OPA2835IRUNT reliable?
The price and inventory of OPA2835IRUNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2835IRUNT is usually 5 days.
3.What payment methods are accepted for OPA2835IRUNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2835IRUNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2835IRUNT?
OPA2835IRUNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2835IRUNT 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 OPA2835IRUNT?
For technical support, including OPA2835IRUNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2835IRUNT requirements.
6.How does Aetrix verify that OPA2835IRUNT is sourced from the original manufacturer or authorized distributors?
All OPA2835IRUNT 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 OPA2835IRUNT meets industry standards.
7.What is the process for return or replacement of OPA2835IRUNT?
All OPA2835IRUNT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2835IRUNT, 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 OPA2835IRUNT part is unused and in its original packaging.
Return procedure for OPA2835IRUNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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