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Texas Instruments OPA2835IRUNR
- Part No.:
- OPA2835IRUNR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-WFQFN
- Datasheet:
-
OPA2835IRUNR.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 10WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,482
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Product details
Overview
OPA2835IRUNR 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-fidelity signal conditioning in battery-powered portable systems.
For engineers reviewing the OPA2835IRUNR datasheet, OPA2835IRUNR pinout, OPA2835IRUNR application, or OPA2835IRUNR equivalent, key selection criteria include its sub-1-µA power-down mode, –0.2 V to 3.9 V input voltage range (5-V supply), 113 dB CMRR, 9.3 nV/√Hz input voltage noise, and operation across –40°C to +125°C.
Technical Context
The OPA2835IRUNR implements a voltage-feedback architecture optimized for low-power, high-speed precision. Its dual-channel design features independent power-down pins (PD1/PD2), enabling per-amplifier sleep control without affecting channel crosstalk (–120 dB at 10 kHz).
It supports single-supply operation from 2.5 V to 5.5 V with true negative-rail input capability (down to –0.2 V) and rail-to-rail output swing. The UQFN package integrates no internal gain-setting resistors-unlike the OPA835IRUN variant-making it a standard dual op amp requiring external feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 5.5 V - enables direct integration into Li-ion and USB-powered systems without level-shifting. |
| Quiescent Current per Channel | 250 µA (typical) - allows continuous operation in multi-channel sensor front-ends with <1 mW total bias power at 5 V. |
| Small-Signal Bandwidth | 56 MHz (AV = 1, VS = 5 V) - supports >20 MSPS ADC driver applications with minimal phase lag. |
| Slew Rate | 160 V/µs (rise, 2-V step, G = 2) - ensures faithful reproduction of fast transient signals up to ~25 MHz full-power bandwidth. |
| Input Voltage Noise | 9.3 nV/√Hz at 100 kHz - maintains SNR >90 dB in audio-band and ultrasonic flow meter preamp stages. |
| CMRR | 113 dB (min 91 dB) - rejects common-mode interference in noisy industrial sensor interfaces with >120,000:1 rejection ratio. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and medical portable equipment environments. |
Pinout & Package
OPA2835IRUNR 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. The package has no integrated gain-setting resistors - all feedback components must be externally placed.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VIN1– | Inverting input, Channel 1 | Accepts differential or single-ended signals; supports common-mode down to –0.2 V (5-V supply). |
| VIN1+ | Noninverting input, Channel 1 | High-impedance node (250 MΩ || 1.2 pF) for precision sensor interfacing. |
| VOUT1 | Output, Channel 1 | Rail-to-rail swing (0.15 V to 2.5 V at 5 V, G = 5) drives 40 mA loads directly. |
| VS– | Negative power supply | Reference for both inputs and outputs; supports true negative-rail input operation. |
| VIN2+ | Noninverting input, Channel 2 | Electrically isolated from Channel 1; crosstalk –120 dB at 10 kHz ensures dual-channel integrity. |
| VIN2– | Inverting input, Channel 2 | Matches Channel 1 specs; enables independent configuration of each amplifier. |
| VOUT2 | Output, Channel 2 | Independent output stage; no shared load path with Channel 1. |
| VS+ | Positive power supply | Accepts 2.5–5.5 V; PSRR 105 dB minimizes supply ripple coupling into signal path. |
| PD1 | Power-down control, Channel 1 | Active-low logic input; pulls quiescent current to 0.5 µA when driven ≤0.7 V. |
| PD2 | Power-down control, Channel 2 | Independent enable/disable; allows asymmetric power management in multi-stage chains. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 250 µA/ch enables >1-year battery life in always-on wearable biosensors using coin cells. |
| Sub-1-µA power-down mode | 0.5 µA typical per channel reduces standby power by 500× versus active mode - critical for duty-cycled IoT nodes. |
| Negative-rail input with RRO output | –0.2 V to 3.9 V input range and rail-to-rail output maximize dynamic range in single-supply 3.3 V or 5 V systems. |
| High-speed precision | 56 MHz GBW + 160 V/µs slew rate + 0.00003% THD enables clean amplification of 1–10 MHz ultrasonic flow meter signals. |
| Robust industrial qualification | –40°C to +125°C operation with 113 dB CMRR and 105 dB PSRR ensures reliability in motor control feedback loops. |
Applications
| Audio ADC Input Buffer | Low-Power SAR ADC Driver |
|---|---|
Use Scenario: Preconditioning analog microphone or line-level audio before 24-bit delta-sigma ADC sampling at 192 kSPS. IC Role / Device Role / Timing Role: Dual-channel buffer isolating source impedance, providing gain/level shift, and driving ADC input capacitance without settling error. Use Value: 9.3 nV/√Hz noise and –130 dBc THD preserve >110 dB SNR; rail-to-rail output ensures full utilization of ADC reference range. |
Use Scenario: Driving the switched-capacitor input of a 16-bit SAR ADC (e.g., ADS8860) in portable data loggers. IC Role / Device Role / Timing Role: High-speed unity-gain follower with 55 ns 0.1% settling time to meet acquisition window timing constraints. Use Value: 250 µA/ch quiescent current extends battery runtime; 56 MHz bandwidth prevents aliasing from anti-alias filter roll-off. |
| Ultrasonic Flow Meter Front-End | Portable System Signal Conditioning |
Use Scenario: Amplifying 1–5 MHz burst-receive signals from piezoelectric transducers in battery-powered water/gas meters. IC Role / Device Role / Timing Role: Low-noise, high-bandwidth gain stage preceding envelope detection and digitization. Use Value: 160 V/µs slew rate preserves pulse fidelity; –70 dBc HD2 at 1 MHz ensures accurate time-of-flight measurement. |
Use Scenario: Multi-function signal chain in handheld test equipment (e.g., portable oscilloscope front-end or sensor hub). IC Role / Device Role / Timing Role: Dual op amp performing simultaneous tasks: one channel as PGA, the other as anti-alias filter buffer. Use Value: Independent PD1/PD2 pins allow dynamic power gating per function block; 2.0 mm × 2.0 mm UQFN saves PCB area in space-constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed low-power op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2836IDGSR | Higher bandwidth (205 MHz), higher IQ (1 mA/ch), no power-down mode, SOIC-8 package (4.9 mm × 3.9 mm). | Better suited for wideband instrumentation where speed outweighs power budget; not viable for space- or battery-limited designs. | Select OPA2836IDGSR only if >100 MHz bandwidth is required and PCB area/power are unconstrained. |
| LMV797MMX/NOPB | Lower bandwidth (88 MHz), higher IQ (1.25 mA/ch), no power-down, rail-to-rail input/output, 8-pin VSSOP (3 mm × 3 mm). | Offers rail-to-rail input (unlike OPA2835IRUNR's negative-rail-only input), but consumes 5× more current and lacks thermal grade. | Choose LMV797MMX/NOPB only when rail-to-rail input is mandatory and operating temperature stays below 85°C. |
Compared with OPA2835IRUNR, OPA2836IDGSR trades 4× higher power for 3.7× bandwidth and eliminates power management flexibility, while LMV797MMX/NOPB sacrifices industrial temperature range and ultra-low power for rail-to-rail input - making OPA2835IRUNR the sole option meeting all three: sub-300 µA/ch, 56 MHz+, and –40°C to +125°C.
Availability
OPA2835IRUNR is available at Aetrix Electronics and suitable for portable medical devices, ultrasonic flow meters, and battery-powered data acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for OPA2835IRUNR 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 over 50 years of innovation in precision amplifiers and signal-chain solutions.
The OPAx835 family was designed specifically for high-speed, ultra-low-power signal conditioning in portable and energy-sensitive applications - balancing bandwidth, noise, and quiescent current where traditional op amps fail.
FAQ
What is the maximum operating supply voltage for OPA2835IRUNR?
The OPA2835IRUNR supports a maximum supply voltage of 5.5 V across VS+ and VS– terminals. Absolute maximum ratings specify VS+ to VS– differential voltage ≤5.5 V; exceeding this risks permanent damage. Operation at 5.5 V is fully characterized per datasheet Section 7.1, with all electrical specifications valid up to this limit.
Does OPA2835IRUNR include internal gain-setting resistors?
No, OPA2835IRUNR does not include internal gain-setting resistors. Unlike the OPA835IRUN variant (which integrates FB1–FB4 pins), the OPA2835IRUNR UQFN package provides only standard op amp pins: VIN1±, VOUT1, VIN2±, VOUT2, VS+, VS–, PD1, and PD2. All feedback networks must be implemented externally.
What is the typical power-down current for OPA2835IRUNR?
The typical power-down current for OPA2835IRUNR is 0.5 µA per channel when PD1 or PD2 is driven low (≤0.7 V). This value is measured at TA = 25°C with VS = 5 V, as specified in Section 7.6 of the datasheet. Total device current in dual-channel shutdown is therefore ~1.0 µA.
Can OPA2835IRUNR operate with a single 3.3-V supply?
Yes, OPA2835IRUNR operates with a single 3.3-V supply (VS+ = 3.3 V, VS– = 0 V). Its 2.5-V to 5.5-V supply range and –0.2 V to 2.5 V input common-mode range (at 3.3 V) support direct interface with 3.3-V microcontrollers and sensors without level-shifting circuitry.
What is the input voltage noise density of OPA2835IRUNR at 100 kHz?
The input voltage noise density of OPA2835IRUNR is 9.3 nV/√Hz at 100 kHz, as confirmed in Sections 7.6 and 7.7 of the datasheet under both 2.7-V and 5-V supply conditions. This value remains stable across temperature and supply voltage, supporting low-noise design in audio and ultrasonic applications.
OPA2835IRUNR 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)
OPA2835IRUNR FAQ
1.How can I place an order for OPA2835IRUNR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2835IRUNR 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 OPA2835IRUNR reliable?
The price and inventory of OPA2835IRUNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2835IRUNR is usually 5 days.
3.What payment methods are accepted for OPA2835IRUNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2835IRUNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2835IRUNR?
OPA2835IRUNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2835IRUNR 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 OPA2835IRUNR?
For technical support, including OPA2835IRUNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2835IRUNR requirements.
6.How does Aetrix verify that OPA2835IRUNR is sourced from the original manufacturer or authorized distributors?
All OPA2835IRUNR 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 OPA2835IRUNR meets industry standards.
7.What is the process for return or replacement of OPA2835IRUNR?
All OPA2835IRUNR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2835IRUNR, 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 OPA2835IRUNR part is unused and in its original packaging.
Return procedure for OPA2835IRUNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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