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Texas Instruments OPA2835ID
- Part No.:
- OPA2835ID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2835ID.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:483
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Product details
Overview
OPA2835ID from Texas Instruments is a dual ultra-low-power, rail-to-rail output, negative-rail input voltage-feedback operational amplifier. It delivers 56 MHz unity-gain bandwidth, 160 V/µs slew rate, and 250 µA/ch quiescent current at 5 V supply, operating from –40°C to +125°C. It serves as a high-speed, low-power ADC driver or audio input buffer in portable instrumentation and ultrasonic flow meters.
For engineers reviewing the OPA2835ID datasheet, OPA2835ID pinout, OPA2835ID application, or OPA2835ID equivalent, key selection criteria include its 250 µA/ch power consumption, –0.2 V to 3.9 V input voltage range (5-V supply), 40 mA output drive, 9.3 nV/√Hz input voltage noise, and SOIC-8 package compatibility with industrial temperature operation.
Technical Context
The OPA2835ID implements a voltage-feedback architecture optimized for low-power, high-frequency signal conditioning. Its negative-rail input stage enables operation with inputs down to –0.2 V (vs. VS–), while rail-to-rail output supports full-swing dynamic range into 2-kΩ loads. The dual-channel design maintains channel-to-channel crosstalk of –120 dB at 10 kHz.
It features independent power-down pins (PD1/PD2) enabling per-amplifier shutdown to 0.5 µA typical, with 250 ns turn-on and 50 ns turn-off delays. DC precision includes ±100 µV max input offset voltage and 113 dB CMRR, validated across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 5.5 V single supply - supports battery-powered systems down to 2.5 V without performance degradation. |
| Quiescent Current | 250 µA per channel at 5 V - enables >10-year battery life in always-on sensor front-ends. |
| Unity-Gain Bandwidth | 56 MHz at VS = 5 V - sufficient for driving 16-bit SAR ADCs up to 2 MSPS with <0.1% settling. |
| Slew Rate | 160 V/µs (rise), 260 V/µs (fall) at G = 2 - ensures faithful reproduction of fast transients in ultrasonic pulse amplification. |
| Input Voltage Range | –0.2 V to 3.9 V (5-V supply) - allows direct interfacing to sub-ground reference sensors or level-shifted digital logic. |
| Output Drive | ±40 mA - drives 50-Ω cables or multiple 10-kΩ ADC inputs without external buffering. |
| THD + Noise | –130 dBc THD and –116.4 dBc SNR at 1 kHz - meets audio-grade line-input buffer requirements. |
Pinout & Package
OPA2835ID is housed in an 8-pin SOIC package (4.90 mm × 3.91 mm body size), optimized for thermal performance (RθJA = 150.1°C/W) and board-level manufacturability.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VIN1– | Inverting input, Channel 1 | Differential node for feedback configuration; supports stable unity-gain or high-Z sensor interfaces. |
| VIN1+ | Noninverting input, Channel 1 | High-impedance node (250 MΩ || 1.2 pF) for precision signal routing without loading. |
| VOUT1 | Output, Channel 1 | Rail-to-rail swing (0.15 V to 2.5 V at 5 V supply, G = 5) enables full utilization of ADC input range. |
| VS– | Negative supply | Reference for both input common-mode and output swing; accepts 0 V or negative rails down to –2.75 V. |
| VS+ | Positive supply | Accepts 2.5–5.5 V; internal regulation ensures consistent biasing across supply variation. |
| VIN2– | Inverting input, Channel 2 | Independent channel input; crosstalk < –120 dB prevents interference in dual-path signal chains. |
| VIN2+ | Noninverting input, Channel 2 | Matched to VIN1+ in offset and noise - critical for differential gain stages or matched filter banks. |
| VOUT2 | Output, Channel 2 | Simultaneous dual-output capability supports stereo audio, I/Q demodulation, or redundant sensing paths. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 250 µA/ch enables multi-channel analog front-ends in energy-constrained IoT nodes without thermal derating. |
| Power-down mode | 0.5 µA/ch shutdown with 250 ns wake-up time supports burst-mode acquisition in portable medical devices. |
| Negative-rail input | –0.2 V input capability allows direct connection to grounded thermocouples or current-sense shunts referenced to system ground. |
| Rail-to-rail output | Drives within 13 mV of rails at 5 V supply - maximizes dynamic range for 16-bit ADCs with 0–5 V input spans. |
| Low distortion | –130 dBc THD at 1 kHz ensures fidelity in audio ADC buffers and precision waveform generation circuits. |
Applications
| Portable ECG Monitor Front-End | Ultrasonic Flow Meter Signal Chain |
|---|---|
|
Use Scenario: Amplifying microvolt-level biopotential signals from dry electrodes under battery-limited conditions. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier first stage with independent power-down for lead-off detection. Use Value: 250 µA/ch current draw extends battery life beyond 72 hours; –0.2 V input range accommodates electrode offset voltages without AC coupling. |
Use Scenario: Conditioning 1–2 MHz burst pulses from piezoelectric transducers in clamp-on flow sensors. IC Role / Device Role / Timing Role: High-speed, low-noise gain stage before envelope detection and time-of-flight measurement. Use Value: 56 MHz bandwidth and 160 V/µs slew rate preserve pulse edge integrity; 9.3 nV/√Hz noise floor maintains SNR >70 dB over 1-MHz bandwidth. |
| Audio ADC Input Buffer | Low-Power SAR ADC Driver |
|
Use Scenario: Driving 24-bit audio ADCs in battery-powered voice recorders with minimal added noise. IC Role / Device Role / Timing Role: Single-supply, rail-to-rail output buffer isolating microphone preamp from ADC input capacitance. Use Value: –116.4 dBc SNR and –130 dBc THD meet professional audio line-input specs; RRO output eliminates need for level-shifting circuitry. |
Use Scenario: Providing fast-settling, low-distortion drive for 16-bit SAR ADCs sampling at 1–2 MSPS in handheld test equipment. IC Role / Device Role / Timing Role: Unity-gain stable buffer with 55 ns 0.1% settling time ensuring accurate sample-and-hold capture. Use Value: 55 ns settling guarantees <0.5 LSB error at 16-bit resolution; 40 mA output drive handles 10-kΩ || 10 pF ADC input loads directly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2836ID | Higher 205 MHz GBW and 560 V/µs slew rate; 1 mA/ch quiescent current - trades power for speed. | Better suited for >10 MSPS ADC drivers or RF IF amplification; not optimal for sub-100 µA battery budgets. | Select OPA2836ID only when bandwidth >100 MHz is required and power budget exceeds 800 µA/ch. |
| OPA2365AIDR | Lower 50 MHz GBW, 25 V/µs slew rate, but 5 mA/ch IQ; rail-to-rail input/output - wider input range, higher power. | Preferred for precision DC-coupled applications needing full rail-to-rail input; unsuitable for long-life battery use. | Choose OPA2365AIDR when input common-mode must extend to VS+ or when offset drift <0.5 µV/°C is mandatory. |
Compared with OPA2835ID, OPA2836ID offers 4× more bandwidth at 4× higher current, while OPA2365AIDR provides rail-to-rail input at 20× higher quiescent power - making OPA2835ID the optimal balance for high-speed, ultra-low-power dual-channel signal conditioning.
Availability
OPA2835ID is available at Aetrix Electronics and suitable for portable medical devices, ultrasonic flow meters, battery-powered audio recorders, and high-density data acquisition systems requiring stable component supply across extended temperature ranges.
Supply support for OPA2835ID 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-bandwidth signal conditioning in portable and industrial sensing applications - prioritizing performance-per-microwatt efficiency without sacrificing precision or robustness.
FAQ
What is the maximum operating temperature for the OPA2835ID?
The OPA2835ID is characterized for continuous operation from –40°C to +125°C ambient temperature, with all electrical specifications guaranteed across this extended industrial range. Thermal metrics (RθJA = 150.1°C/W) confirm reliable performance in sealed enclosures or high-ambient environments typical of flow meter housings or automotive cabin modules.
Does the OPA2835ID support true rail-to-rail input?
No - the OPA2835ID features negative-rail input (down to –0.2 V below VS–) and rail-to-rail output, but its input common-mode range does not extend to VS+. At 5 V supply, input high is limited to 3.9 V. For full rail-to-rail input, consider alternatives like the OPA2365AIDR, though at significantly higher quiescent current.
How does the power-down function operate on the OPA2835ID?
The OPA2835ID has two dedicated power-down pins (PD1 and PD2), one per amplifier. Driving PDx low (≤0.7 V) reduces that channel's quiescent current to 0.5 µA typical. Each pin must be actively driven - floating or high-impedance states are undefined. Turn-on delay is 250 ns; turn-off is 50 ns.
Can the OPA2835ID drive a 50-Ω coaxial cable directly?
Yes - the OPA2835ID delivers ±40 mA output current and maintains stability into 50-Ω loads. Its 160 V/µs slew rate and 56 MHz bandwidth support clean transmission of fast pulses (e.g., ultrasonic bursts) over short cables. For longer runs or impedance matching, a series 50-Ω resistor at the output is recommended.
What is the input voltage noise density of the OPA2835ID and where is it specified?
The OPA2835ID has an input voltage noise density of 9.3 nV/√Hz at 100 kHz, as measured and specified in Section 7.7 of the official TI datasheet (SLOS713J, Rev. March 2021). This value remains flat across the 10 kHz–10 MHz band, supporting low-noise amplification in wideband sensor interfaces without significant 1/f contribution.
OPA2835ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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:
- 8-SOIC
OPA2835ID FAQ
1.How can I place an order for OPA2835ID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2835ID 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 OPA2835ID reliable?
The price and inventory of OPA2835ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2835ID is usually 5 days.
3.What payment methods are accepted for OPA2835ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2835ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2835ID?
OPA2835ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2835ID 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 OPA2835ID?
For technical support, including OPA2835ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2835ID requirements.
6.How does Aetrix verify that OPA2835ID is sourced from the original manufacturer or authorized distributors?
All OPA2835ID 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 OPA2835ID meets industry standards.
7.What is the process for return or replacement of OPA2835ID?
All OPA2835ID units undergo pre-shipment inspection (PSI). If there is an issue with OPA2835ID, 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 OPA2835ID part is unused and in its original packaging.
Return procedure for OPA2835ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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