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Texas Instruments OPA2835IRMCR
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- Part No.:
- OPA2835IRMCR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-UFQFN
- Datasheet:
-
OPA2835IRMCR.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 10UQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,889
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Product details
Overview
OPA2835IRMCR from Texas Instruments is a dual ultra-low-power, rail-to-rail output, negative-rail input voltage-feedback operational amplifier in a 10-pin VSSOP package. It delivers 56 MHz unity-gain 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 OPA2835IRMCR datasheet, OPA2835IRMCR pinout, OPA2835IRMCR application, or OPA2835IRMCR equivalent, key selection criteria include its –0.2 V to 3.9 V input voltage range (5-V supply), 40 mA output drive, 113 dB CMRR, and dual-channel power-down capability with 0.5 µA shutdown current - critical for low-power SAR ADC drivers and ultrasonic flow meter front-ends.
Technical Context
The OPA2835IRMCR implements a voltage-feedback architecture optimized for wide bandwidth and low distortion across 2.5 V–5.5 V single-supply operation. Its negative-rail input stage supports true single-supply operation down to VS–, while rail-to-rail output swing enables full dynamic range utilization in low-voltage systems.
Each channel features independent power-down control (PD1/PD2 pins), enabling selective channel disablement without affecting the other amplifier. The device maintains 55 ns 0.1% settling time and –130 dBc THD at 1 kHz, making it suitable for precision, high-frequency buffer and driver roles in mixed-signal signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5 V to 5.5 V single supply - supports direct integration into 3.3 V and 5 V systems without level-shifting. |
| Quiescent Current | 250 µA per channel - enables multi-channel, always-on sensing in energy-constrained IoT nodes. |
| Unity-Gain Bandwidth | 56 MHz - provides sufficient loop gain for stable closed-loop operation up to ~10 MHz with moderate noise gain. |
| Slew Rate | 160 V/µs - ensures faithful reproduction of fast transients in audio ADC input buffers and pulse amplification. |
| Input Voltage Range | –0.2 V to 3.9 V (5-V supply) - allows input signals extending below ground, simplifying sensor interface design. |
| Output Drive | ±40 mA - drives 2 kΩ loads with minimal distortion, supporting direct connection to SAR ADC reference buffers. |
| THD + Noise | 0.00003% (–130 dBc) at 1 kHz - meets high-fidelity requirements for audio and metrology-grade signal paths. |
| Operating Temperature | –40°C to +125°C - qualified for industrial and automotive under-hood applications without derating. |
Pinout & Package
OPA2835IRMCR is housed in a 10-pin VSSOP (DGS) package measuring 3.00 mm × 3.00 mm, with 0.5 mm pitch and exposed thermal pad for enhanced thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1– | Inverting input, Channel 1 | Accepts differential or single-ended feedback; referenced to mid-supply or ground depending on configuration. |
| VIN1+ | Noninverting input, Channel 1 | High-impedance node (250 MΩ || 1.2 pF) for sensor or DAC output connection. |
| VOUT1 | Output, Channel 1 | Rail-to-rail swing (within 20 mV of rails) supports full-scale signal delivery to downstream ADCs. |
| VS– | Negative power supply | Supports true negative-rail input operation; may be connected to ground in single-supply systems. |
| VS+ | Positive power supply | Accepts 2.5–5.5 V; internal regulation ensures stable biasing across supply variation. |
| VIN2+ | Noninverting input, Channel 2 | Independent input path enables dual-channel signal processing without crosstalk (–120 dB @ 10 kHz). |
| VIN2– | Inverting input, Channel 2 | Matches Channel 1 electrical characteristics for matched gain and phase response. |
| VOUT2 | Output, Channel 2 | Simultaneous dual-output capability reduces board space vs. two discrete op-amps. |
| 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 dynamic power scaling per channel in time-multiplexed systems. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 250 µA/ch enables >1-year battery life in continuous-sensing wearable devices using coin-cell batteries. |
| Dual independent power-down | PD1/PD2 pins reduce total system current by >99% per disabled channel, ideal for duty-cycled sensor interfaces. |
| Rail-to-rail output with negative-rail input | Input extends 200 mV below VS– and output swings within 20 mV of both rails - maximizes dynamic range in 3.3 V systems. |
| Low distortion at high frequency | –70 dBc HD2/–73 dBc HD3 at 1 MHz (2 VPP) supports clean signal amplification in ultrasonic flow meter transmit/receive paths. |
| High CMRR and PSRR | 113 dB CMRR and ≥105 dB ±PSRR reject common-mode noise from shared PCB traces and noisy digital supplies. |
| Fast settling and recovery | 55 ns to 0.1% and 200 ns overdrive recovery ensure accurate sampling in high-speed SAR ADC driver applications. |
Applications
| Portable ECG Monitor | Ultrasonic Flow Meter |
|---|---|
|
Use Scenario: Amplifying low-amplitude, high-impedance biopotential signals from dry electrodes in battery-powered handheld ECG units. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front-end with independent power-down for lead-off detection and channel gating. Use Value: 250 µA/ch quiescent current extends battery life beyond 72 hours; rail-to-rail output drives 16-bit SAR ADC inputs without external level-shifting. |
Use Scenario: Conditioning analog receive signals from piezoelectric transducers in clamp-on flow meters operating on 4–20 mA loops or Li-ion batteries. IC Role / Device Role / Timing Role: Low-noise, high-bandwidth transimpedance and post-amplifier stage for echo signal recovery. Use Value: 9.3 nV/√Hz input voltage noise and –130 dBc THD preserve weak echo fidelity; 56 MHz bandwidth resolves sub-ns time-of-flight differences. |
| Industrial Data Acquisition Module | Audio ADC Input Buffer |
|
Use Scenario: Driving multiplexed 18-bit ΣΔ ADC inputs in DIN-rail mounted PLC I/O modules requiring extended temperature operation. IC Role / Device Role / Timing Role: Precision, low-drift buffer isolating ADC inputs from multiplexer switch resistance and charge injection. Use Value: ±100 µV max input offset and 2.25 µV/°C drift maintain accuracy across –40°C to +125°C; 40 mA drive handles 100 Ω source impedance. |
Use Scenario: Anti-aliasing and input buffering for stereo audio ADCs in portable voice recorders and smart speakers. IC Role / Device Role / Timing Role: Dual-channel unity-gain follower providing low-impedance drive and DC blocking for differential ADC inputs. Use Value: –116.4 dBc SNR and <0.00015% THD meet CD-quality audio specs; 160 V/µs slew rate prevents slew-induced distortion at 20 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2836IDGSR | Higher 205 MHz GBW and 560 V/µs slew rate; 1 mA/ch quiescent current - 4× higher power consumption. | Better suited for RF IF amplification or high-resolution oscilloscope front-ends where speed outweighs battery life. | Select OPA2836IDGSR only when >100 MHz small-signal bandwidth is required and power budget permits. |
| LMH6619MMX/NOPB | 140 MHz GBW, 45 V/µs slew rate, rail-to-rail input/output, but 1.25 mA/ch IQ - 5× higher than OPA2835IRMCR. | Optimized for video line driving and high-speed data acquisition with lower distortion at 10–50 MHz. | Choose LMH6619MMX/NOPB for applications needing RRO input and higher drive strength (>75 mA), not ultra-low power. |
Compared with OPA2835IRMCR, OPA2836IDGSR trades 4× higher quiescent current for >3× bandwidth, while LMH6619MMX/NOPB adds rail-to-rail input and higher output current at 5× power cost - making OPA2835IRMCR the optimal choice for battery-powered, high-fidelity, dual-channel signal conditioning where power efficiency is primary.
Availability
OPA2835IRMCR is available at Aetrix Electronics and suitable for portable medical monitors, ultrasonic flow meters, industrial data loggers, and audio ADC interfaces requiring stable component supply and long-term production continuity.
Supply support for OPA2835IRMCR 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 high-performance op-amps and precision signal chain solutions.
The OPAx835 family was designed specifically for ultra-low-power, high-speed signal conditioning in portable and battery-operated equipment - balancing bandwidth, noise, distortion, and quiescent current for next-generation sensor interfaces and data converters.
FAQ
What is the maximum operating supply voltage for OPA2835IRMCR?
The OPA2835IRMCR supports a maximum supply voltage of 5.5 V across VS+ to VS–. This rating applies to both single-supply (e.g., VS– = 0 V, VS+ = 5.5 V) and split-supply configurations (e.g., VS– = –2.75 V, VS+ = +2.75 V). Exceeding 5.5 V risks permanent damage per absolute maximum ratings in the datasheet. OPA2835IRMCR must never be operated outside this range, even transiently.
Does OPA2835IRMCR support rail-to-rail input operation?
No, OPA2835IRMCR does not support rail-to-rail input. It features negative-rail input capability (down to VS– – 0.2 V) but has a limited common-mode input range high of 3.9 V at 5 V supply - meaning the input cannot swing to VS+. For true rail-to-rail input, consider alternatives like OPA2365. OPA2835IRMCR's input stage is optimized for low power and high speed, not full input range.
How does the power-down function work on OPA2835IRMCR?
OPA2835IRMCR provides independent power-down control via PD1 and PD2 pins. Driving either pin low (≤0.7 V above VS–) reduces that channel's quiescent current to 0.5 µA typical. Both pins must be actively driven - floating is undefined. Turnon delay is 250 ns; turnoff delay is 50 ns. OPA2835IRMCR remains functional in normal mode when both PD pins are held high (≥2.1 V above VS–).
What is the thermal resistance (RθJA) of the OPA2835IRMCR VSSOP package?
The OPA2835IRMCR in the 10-pin VSSOP (DGS) package has a junction-to-ambient thermal resistance (RθJA) of 206 °C/W, as specified in Section 7.5 of the datasheet. This value assumes standard JEDEC 2S2P test board conditions. Actual board-level thermal performance depends on copper area, vias, and airflow. OPA2835IRMCR's exposed pad variant (not used in IRMCR) would offer lower RθJA.
Can OPA2835IRMCR drive a 50 Ω load directly?
OPA2835IRMCR is rated for ±40 mA output current into resistive loads, corresponding to a minimum load of 125 Ω at ±5 V output swing. Driving a 50 Ω load continuously risks exceeding safe operating area limits and may cause thermal shutdown or parametric shift. For 50 Ω transmission lines, use a series resistor or dedicated line driver. OPA2835IRMCR is not intended for direct 50 Ω termination.
OPA2835IRMCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-UFQFN
- 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-UQFN (2x2)
OPA2835IRMCR FAQ
1.How can I place an order for OPA2835IRMCR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2835IRMCR 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 OPA2835IRMCR reliable?
The price and inventory of OPA2835IRMCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2835IRMCR is usually 5 days.
3.What payment methods are accepted for OPA2835IRMCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2835IRMCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2835IRMCR?
OPA2835IRMCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2835IRMCR 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 OPA2835IRMCR?
For technical support, including OPA2835IRMCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2835IRMCR requirements.
6.How does Aetrix verify that OPA2835IRMCR is sourced from the original manufacturer or authorized distributors?
All OPA2835IRMCR 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 OPA2835IRMCR meets industry standards.
7.What is the process for return or replacement of OPA2835IRMCR?
All OPA2835IRMCR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2835IRMCR, 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 OPA2835IRMCR part is unused and in its original packaging.
Return procedure for OPA2835IRMCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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