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Texas Instruments OPA2835IDR
- Part No.:
- OPA2835IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2835IDR.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,370
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Product details
Overview
OPA2835IDR from Texas Instruments is a dual ultra-low-power, rail-to-rail output, negative-rail input voltage-feedback operational amplifier. It delivers 56 MHz 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.
For engineers reviewing the OPA2835IDR datasheet, OPA2835IDR pinout, OPA2835IDR application, or OPA2835IDR equivalent, key selection criteria include its 250 µA/ch quiescent current, rail-to-rail output swing, –0.2 V to 3.9 V input voltage range (5-V supply), 56 MHz unity-gain bandwidth, and dual-channel SOIC-8 package compatibility with industrial temperature operation.
Technical Context
The OPA2835IDR implements a voltage-feedback architecture optimized for low power without sacrificing speed-achieving 56 MHz bandwidth and 160 V/µs slew rate while drawing only 250 µA per channel. Its negative-rail input stage enables operation down to –0.2 V (vs. VS–), supporting single-supply signal conditioning near ground.
Each amplifier features independent power-down control (PD1/PD2 pins), reducing quiescent current to 0.5 µA per channel in shutdown. The device maintains 113 dB CMRR and 9.3 nV/√Hz input voltage noise at 100 kHz, enabling precision AC-coupled signal paths in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5 V to 5.5 V - supports single-supply operation in 3.3 V and 5 V systems, including Li-ion battery-powered designs. |
| Quiescent Current | 250 µA per channel - enables multi-channel signal chains with sub-1 mA total bias current at 5 V. |
| Unity-Gain Bandwidth | 56 MHz - sufficient for driving 16-bit SAR ADCs sampling at ≥10 MSPS with minimal settling error. |
| Slew Rate | 160 V/µs - ensures faithful reproduction of fast transients (e.g., ultrasonic pulse edges) without distortion. |
| Input Voltage Range | –0.2 V to 3.9 V (5-V supply) - allows direct interfacing to sensors or DACs referenced to ground or negative rails. |
| Output Drive | ±40 mA - capable of driving 50 Ω transmission lines or multiple parallel loads without external buffers. |
| THD @ 1 kHz | –130 dBc - preserves dynamic range in audio front-ends and precision measurement signal chains. |
Pinout & Package
OPA2835IDR is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.91 mm, optimized for thermal performance (RθJA = 150.1°C/W) and PCB area efficiency in industrial modules.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VIN1– | Inverting input, Channel 1 | Differential input node for first op amp; accepts signals down to –0.2 V relative to VS–. |
| VIN1+ | Noninverting input, Channel 1 | High-impedance input (250 MΩ || 1.2 pF) for single-ended or differential sensing. |
| VOUT1 | Output, Channel 1 | Rail-to-rail output capable of swinging within 20 mV of VS– and 50 mV of VS+ under 10 mA load. |
| VS– | Negative power supply | Reference for both inputs and output; supports true negative-rail input operation. |
| VS+ | Positive power supply | Accepts up to 5.5 V; supplies both amplifiers and internal bias circuitry. |
| VIN2– | Inverting input, Channel 2 | Independent second channel input with identical specs and crosstalk < –120 dB at 10 kHz. |
| VIN2+ | Noninverting input, Channel 2 | Electrically isolated from Channel 1; enables dual-path signal processing on one die. |
| VOUT2 | Output, Channel 2 | Matched performance to VOUT1; supports simultaneous dual-channel buffering or gain stages. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 250 µA per channel enables >100-hour battery life in always-on portable sensors using coin cells or Li-ion. |
| Power-down mode | 0.5 µA per channel shutdown reduces system standby power by >99.8%, critical for IoT edge nodes. |
| Rail-to-rail output | Swings within 20 mV of VS– and 50 mV of VS+ at 10 mA load, maximizing dynamic range in 3.3 V systems. |
| Negative-rail input | Operates with inputs down to –0.2 V (VS–), eliminating level-shifting for ground-referenced sensor outputs. |
| High-speed precision | 56 MHz bandwidth + –130 dBc THD enables clean amplification of wideband signals up to ~10 MHz. |
Applications
| Portable Medical Sensors | Ultrasonic Flow Meter Front-End |
|---|---|
Use Scenario: Amplifying weak analog outputs from piezoelectric transducers in handheld ultrasound probes. IC Role / Device Role / Timing Role: Dual-channel transducer signal conditioner with matched gain and phase response across channels. Use Value: 56 MHz bandwidth captures full 1–5 MHz ultrasonic echo spectrum; 250 µA/ch minimizes heat and extends battery runtime. |
Use Scenario: Conditioning time-of-flight pulses in clamp-on flow meters with ±5 V excitation and mV-level return signals. IC Role / Device Role / Timing Role: High-slew-rate, low-noise preamplifier for precise pulse edge detection and amplitude measurement. Use Value: 160 V/µs slew rate preserves nanosecond-scale pulse rise times; –130 dBc THD ensures accurate time-of-flight calculation. |
| Low-Power Audio ADC Interface | Industrial Data Acquisition Channel |
Use Scenario: Driving the input of a 24-bit sigma-delta ADC in battery-powered audio recorders or voice analytics devices. IC Role / Device Role / Timing Role: Rail-to-rail output buffer isolating ADC from source impedance variations and preserving SNR. Use Value: 9.3 nV/√Hz input noise and –116.4 dBc SNR maintain >110 dB effective number of bits (ENOB) at audio frequencies. |
Use Scenario: Signal conditioning for multi-channel thermocouple or strain gauge measurements in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Precision, low-drift dual op amp providing gain, filtering, and level shifting before multiplexed ADC sampling. Use Value: ±100 µV max input offset and 113 dB CMRR reject common-mode noise in electrically noisy factory environments. |
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 |
|---|---|---|---|
| OPA2836IDR | Higher 205 MHz bandwidth and 560 V/µs slew rate; 1 mA/ch quiescent current - 4× higher power consumption. | Better suited for >50 MSPS ADC drivers or RF IF amplification where speed outweighs battery life. | Select OPA2836IDR only when bandwidth >100 MHz is required and power budget allows ≥1 mA/ch. |
| OPA2365AIDR | 50 MHz bandwidth, 25 V/µs slew rate, 5 mA/ch quiescent current; rail-to-rail input/output - wider input range but much higher power. | Preferred for precision DC-coupled applications needing full rail-to-rail input and lower offset drift (0.5 µV/°C). | Choose OPA2365AIDR when input common-mode range must extend to VS+ and ultra-low drift is prioritized over power. |
Compared with OPA2835IDR, OPA2836IDR trades 4× higher supply current for >3× bandwidth, while OPA2365AIDR sacrifices speed and efficiency for rail-to-rail input and superior DC precision - making OPA2835IDR the optimal balance for portable high-frequency signal chains requiring sub-300 µA/ch operation.
Availability
OPA2835IDR is available at Aetrix Electronics and suitable for portable medical sensors, ultrasonic flow meters, low-power audio interfaces, and industrial data acquisition systems requiring stable component supply across extended temperature ranges.
Supply support for OPA2835IDR 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 battery-powered, high-bandwidth signal conditioning - delivering industry-leading speed-per-microwatt performance for portable test equipment, medical wearables, and industrial IoT edge nodes.
FAQ
What is the maximum operating temperature for OPA2835IDR?
The OPA2835IDR is characterized for continuous operation from –40°C to +125°C ambient temperature, meeting extended industrial requirements. Thermal metrics (RθJA = 150.1°C/W) confirm reliable performance in sealed enclosures or high-ambient environments typical in PLCs and motor drives.
Does OPA2835IDR support true single-supply operation with ground-referenced inputs?
Yes - OPA2835IDR features negative-rail input capability, allowing its inputs to operate down to –0.2 V relative to VS–. With VS– tied to ground and VS+ at 3.3 V or 5 V, VIN– and VIN+ accept signals from 0 V up to 3.9 V, enabling direct interface with ground-referenced sensors and DACs without level shifters.
How does the power-down function work on OPA2835IDR?
OPA2835IDR provides independent PD1 and PD2 pins: driving either pin low (≤0.7 V) disables its respective amplifier, reducing quiescent current to 0.5 µA typical. Both amplifiers remain active when PD1 and PD2 are ≥2.1 V. The pin must be actively driven - floating is undefined.
What is the small-signal bandwidth of OPA2835IDR at 5 V supply?
At VS = 5 V, the OPA2835IDR achieves 56 MHz small-signal bandwidth (G = 1 V/V, VOUT = 100 mVPP). This is measured under standard conditions (TA = 25°C, RL = 2 kΩ) and supports stable closed-loop gain configurations up to G = 5 with usable bandwidth >7 MHz.
Is OPA2835IDR pin-compatible with other TI dual op amps in SOIC-8?
No - OPA2835IDR uses a non-standard SOIC-8 pinout optimized for dual independent amplifiers with separate power-down controls (PD1/PD2). It is not pin-compatible with generic dual op amps like LM358 or TLV2462. Layout must follow Figure 6-2 and Table 6-1 in the datasheet.
OPA2835IDR 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:
- 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
OPA2835IDR FAQ
1.How can I place an order for OPA2835IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2835IDR 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 OPA2835IDR reliable?
The price and inventory of OPA2835IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2835IDR is usually 5 days.
3.What payment methods are accepted for OPA2835IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2835IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2835IDR?
OPA2835IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2835IDR 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 OPA2835IDR?
For technical support, including OPA2835IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2835IDR requirements.
6.How does Aetrix verify that OPA2835IDR is sourced from the original manufacturer or authorized distributors?
All OPA2835IDR 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 OPA2835IDR meets industry standards.
7.What is the process for return or replacement of OPA2835IDR?
All OPA2835IDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2835IDR, 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 OPA2835IDR part is unused and in its original packaging.
Return procedure for OPA2835IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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