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Texas Instruments OPA2335AIDGKR
- Part No.:
- OPA2335AIDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2335AIDGKR.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2CIRC 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,877
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Product details
Overview
OPA2335AIDGKR from Texas Instruments is a dual, zero-drift CMOS operational amplifier in MSOP-8 package, delivering 5 µV max input offset voltage, 0.05 µV/°C max drift, 2.7–5.5 V single-supply operation, rail-to-rail output swing, and 285 µA per-channel quiescent current - optimized for precision transducer signal conditioning in battery-powered instrumentation.
For engineers reviewing the OPA2335AIDGKR datasheet, OPA2335AIDGKR pinout, OPA2335AIDGKR application, or OPA2335AIDGKR equivalent, key selection criteria include guaranteed low-drift performance over –40°C to +125°C, absence of shutdown functionality (vs. OPA2334), dual-channel layout efficiency in space-constrained PCBs, and compatibility with low-voltage single-supply sensor front-ends requiring <1 µV/°C thermal error contribution.
Technical Context
The OPA2335AIDGKR employs auto-zeroing architecture with a time-continuous 2 MHz main amplifier corrected every 100 µs, enabling near-zero long-term drift and eliminating 1/f noise without introducing significant 10 kHz correction artifacts. Its input stage features ultra-low bias current (±70 pA typ) and high common-mode rejection (110 dB min over temperature).
This dual op amp operates without shutdown logic, distinguishing it from the OPA2334 family; its rail-to-rail output delivers 15 mV from each rail at 10 kΩ load across full temperature range, and supports unity-gain stability with no phase reversal - critical for precision DC-coupled measurement paths in medical and industrial sensors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 5 µV (max) - ensures ≤0.01% gain error in 50 mV full-scale bridge amplifier designs without trimming. |
| Offset Drift | 0.05 µV/°C (max) - contributes <0.6 µV total drift over 125°C ambient range, enabling sub-0.1°C accuracy in RTD/thermocouple interfaces. |
| Quiescent Current | 570 µA (total, both channels) - enables continuous operation in handheld test equipment with >100-hour battery life at 3 V supply. |
| Supply Voltage Range | +2.7 V to +5.5 V - supports direct interfacing with Li-ion (3.0–4.2 V) and 3.3 V logic rails without LDO overhead. |
| CMRR | 110 dB (min, –40°C to +125°C) - rejects >100 kΩ unbalanced source impedance mismatch in differential sensor configurations. |
| Gain-Bandwidth Product | 2 MHz - sufficient for 10-bit settling (<1 µs) in 100 kHz anti-aliasing filter stages with G = 10. |
| Input Bias Current | ±70 pA (typ, +25°C) - minimizes voltage error across 10 MΩ thermistor or pH electrode networks. |
Pinout & Package
OPA2335AIDGKR is housed in an 8-pin VSSOP (DGK) package - 2.95 mm × 3.05 mm × 1.07 mm body, 0.65 mm pitch - optimized for high-density analog layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V+) | Positive Supply | Accepts +2.7 V to +5.5 V; requires local 0.1 µF ceramic decoupling to minimize PSRR degradation. |
| 2 (Out A) | Amplifier A Output | Rail-to-rail swing; high-impedance when unused but not internally disconnected - must be terminated if not driven. |
| 3 (–In A) | Inverting Input A | Low-bias, high-impedance node; sensitive to layout-induced thermoelectric offsets - match trace geometry to non-inverting input. |
| 4 (+In A) | Non-Inverting Input A | Paired with Pin 3 for balanced differential sensing; same ESD protection and bias characteristics as Pin 3. |
| 5 (V–) | Negative Supply / Ground Reference | Reference for all inputs and outputs; must be low-impedance return path - shared with Pin 8 in single-supply use. |
| 6 (+In B) | Non-Inverting Input B | Independent channel input; identical specs to Pin 4 - enables dual-sensor or chopper-stabilized reference buffer topologies. |
| 7 (–In B) | Inverting Input B | Matches Pin 3 electrical behavior; allows simultaneous conditioning of two independent transducer signals on one die. |
| 8 (Out B) | Amplifier B Output | Functionally identical to Pin 2; supports dual-output configurations such as I/V + V/I conversion in portable analyzers. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift auto-zero topology | Eliminates 1/f noise and guarantees <0.05 µV/°C drift - removes need for system-level recalibration in field-deployed instruments. |
| Rail-to-rail output | Swings within 15 mV of supply rails at 10 kΩ load - maximizes dynamic range in 3.3 V ADC interfaces without level-shifting circuitry. |
| High CMRR & PSRR | 110 dB CMRR and >100 dB PSRR over temperature - preserves signal integrity in noisy industrial environments with shared power domains. |
| Ultra-low input bias current | ±70 pA typical - avoids loading errors in high-impedance pH electrodes, piezoresistive sensors, or photodiode TIA feedback networks. |
| Unity-gain stable, no phase reversal | Operates reliably at G = 1 with capacitive loads up to 50 pF - simplifies design of anti-aliasing filters and sensor buffers without external compensation. |
Applications
| Transducer Signal Conditioning | Temperature Measurement |
|---|---|
|
Use Scenario: Amplifying low-level mV outputs from load cells, strain gauges, or pressure bridges in electronic scales and industrial weighing systems. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front-end - Channel A buffers reference voltage, Channel B amplifies bridge differential output. Use Value: 5 µV offset and 0.05 µV/°C drift ensure ≤0.02% full-scale error over temperature - meets OIML R76 Class III accuracy requirements without calibration. |
Use Scenario: Cold-junction compensation and linearization of K-type thermocouples in portable medical thermometers and HVAC controllers. IC Role / Device Role / Timing Role: Precision voltage follower and gain stage driving 16-bit delta-sigma ADC - leverages rail-to-rail output to maximize SNR at 3.3 V supply. Use Value: ±70 pA input bias prevents self-heating errors in 100 kΩ thermistor networks; 2.7 V minimum supply enables direct coin-cell operation. |
| Medical Instrumentation | Battery-Powered Test Equipment |
|
Use Scenario: Front-end amplification of ECG electrode signals and bioimpedance measurements in handheld patient monitors. IC Role / Device Role / Timing Role: Dual-channel AC-coupled amplifier - one channel for lead-off detection, one for signal path - exploiting matched drift for common-mode rejection. Use Value: Matched channel drift (<0.05 µV/°C) reduces thermal gradient-induced baseline wander; 570 µA total IQ extends AA battery life to >200 hours. |
Use Scenario: Portable multimeter input stage and autoranging voltage/current measurement circuits with integrated 24-bit ADC. IC Role / Device Role / Timing Role: Programmable-gain amplifier core - configured as G = 1, 10, 100 using external resistors; benefits from zero-drift for DC accuracy. Use Value: Guaranteed 5 µV offset eliminates null adjustment during manufacturing; MSOP-8 footprint saves >40% board area vs. SOIC-8 in compact handheld enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2334AIDGSR | Includes shutdown mode (2 µA standby), same offset/drift specs, MSOP-10 package (10 pins, larger footprint) | Required where intermittent operation or power cycling is used - e.g., data loggers with wake-on-event | Select OPA2334AIDGSR only if active power gating is needed; OPA2335AIDGKR offers smaller size and lower cost for always-on designs. |
| AD8629ARZ | Single-supply, zero-drift dual op amp; 1 µV max offset, 0.005 µV/°C drift, SO-8 package; higher IQ (1.2 mA total) | Better drift performance but higher power - suited for lab-grade instruments where ultimate stability outweighs battery life | Choose AD8629ARZ when sub-0.1 µV/°C drift is mandatory; OPA2335AIDGKR provides optimal balance of precision, size, and efficiency for portable applications. |
Compared with OPA2334AIDGSR, OPA2335AIDGKR saves board space and eliminates enable logic complexity; versus AD8629ARZ, it reduces quiescent current by 53% while maintaining sufficient drift performance for medical and industrial grade specifications.
Availability
OPA2335AIDGKR is available at Aetrix Electronics and suitable for transducer signal conditioning, temperature measurement, medical instrumentation, battery-powered test equipment, and handheld diagnostic devices requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2335AIDGKR 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 50 years of innovation in precision signal chain solutions.
The OPA2335AIDGKR belongs to TI's Zerø-Drift Series of precision op amps, designed specifically for high-accuracy, low-power sensor interface applications where long-term stability and minimal thermal drift are critical - including medical diagnostics, industrial process control, and portable instrumentation.
FAQ
What is the maximum operating temperature range for the OPA2335AIDGKR?
The OPA2335AIDGKR is specified for operation from –40°C to +125°C, with absolute maximum junction temperature rated at +150°C. This extended range supports deployment in automotive under-hood modules, industrial PLCs, and outdoor medical devices where ambient conditions exceed standard commercial limits. The device maintains its 5 µV max offset and 0.05 µV/°C drift specification across this full range.
Does the OPA2335AIDGKR include a shutdown pin?
No, the OPA2335AIDGKR does not include a shutdown function. It is the non-shutdown variant of the dual zero-drift series - unlike the pin-compatible OPA2334 which adds an Enable pin in MSOP-10. The OPA2335AIDGKR operates continuously when powered; for power-gated applications, external FET switching of the V+ rail or selection of OPA2334AIDGSR is required.
What package type and dimensions does the OPA2335AIDGKR use?
The OPA2335AIDGKR uses the DGK package - an 8-pin VSSOP (Very Small Outline Package) measuring 2.95 mm × 3.05 mm × 1.07 mm with 0.65 mm lead pitch. This compact footprint occupies ~40% less PCB area than standard SOIC-8, enabling high-density analog sections in handheld and wearable electronics while maintaining compatibility with standard SMT reflow profiles (MSL Level-2-260°C).
Can the OPA2335AIDGKR drive capacitive loads without oscillation?
Yes, the OPA2335AIDGKR is unity-gain stable and characterized to drive up to 50 pF capacitive loads without external compensation, as verified in the Small-Signal Response plot (Figure 5). For loads exceeding 50 pF - such as long traces or ADC input capacitance - a small series resistor (10–50 Ω) between output and load is recommended to maintain phase margin and prevent peaking.
How does the auto-zero architecture of the OPA2335AIDGKR affect system-level noise performance?
The OPA2335AIDGKR's auto-zero circuit corrects offset every 100 µs (10 kHz rate), but introduces negligible in-band noise - its 0.01–10 Hz noise is 1.4 µVPP, and spectral density shows no significant energy at 10 kHz. High-frequency correction artifacts (>20 MHz) are easily filtered; most precision DC applications require no additional filtering beyond standard 0.1 µF supply decoupling.
OPA2335AIDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.6V/µs
- Gain Bandwidth Product:
- 2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 70 pA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 285µA (x2 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2335AIDGKR FAQ
1.How can I place an order for OPA2335AIDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2335AIDGKR 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 OPA2335AIDGKR reliable?
The price and inventory of OPA2335AIDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2335AIDGKR is usually 5 days.
3.What payment methods are accepted for OPA2335AIDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2335AIDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2335AIDGKR?
OPA2335AIDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2335AIDGKR 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 OPA2335AIDGKR?
For technical support, including OPA2335AIDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2335AIDGKR requirements.
6.How does Aetrix verify that OPA2335AIDGKR is sourced from the original manufacturer or authorized distributors?
All OPA2335AIDGKR 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 OPA2335AIDGKR meets industry standards.
7.What is the process for return or replacement of OPA2335AIDGKR?
All OPA2335AIDGKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2335AIDGKR, 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 OPA2335AIDGKR part is unused and in its original packaging.
Return procedure for OPA2335AIDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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