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Texas Instruments OPA2834IDGKT
- Part No.:
- OPA2834IDGKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2834IDGKT.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:367
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Product details
Overview
OPA2834IDGKT from Texas Instruments is a dual-channel, ultra-low-power, negative-rail-input, rail-to-rail-output voltage-feedback operational amplifier. It delivers 50-MHz unity-gain bandwidth, 26-V/µs slew rate, and 170-µA per channel quiescent current at 5-V supply - enabling high-speed signal conditioning in space-constrained, battery-powered systems such as portable voice recorders and low-power SAR ADC drivers.
For engineers reviewing the OPA2834IDGKT datasheet, OPA2834IDGKT pinout, OPA2834IDGKT application, or OPA2834IDGKT equivalent, key selection criteria include its –0.2-V input common-mode range (enabling true single-supply low-side current sensing), 12-nV/√Hz input voltage noise at 10 kHz, and guaranteed operation from –40°C to +125°C for industrial and automotive subsystems.
Technical Context
The OPA2834IDGKT employs a bipolar input stage optimized for low distortion (–131 dBc HD2, –143 dBc HD3 at 10 kHz) and wide supply flexibility (2.7 V to 5.4 V single supply or ±1.35 V to ±2.7 V dual supply). Its negative-rail input extends usable dynamic range in low-voltage sensor interfaces, while rail-to-rail output supports full-scale swing into 5-kΩ loads with <100-mV headroom to rails.
Designed for precision analog front-ends, it features matched channel performance (–130 dBc crosstalk at 100 kHz), low input offset drift (1.2 µV/°C), and stable unity-gain operation without external compensation - making it suitable for driving high-resolution ADCs and microphone preamplifiers where SNR and THD are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 50 MHz at G = 1 - enables accurate amplification of fast transients in data acquisition and audio paths. |
| Slew Rate | 26 V/µs at VS = 5 V - supports clean 2-V step response with 88-ns settling to 0.1%. |
| Quiescent Current | 170 µA per channel - allows dual-opamp functionality in sub-350-µA total system bias budgets. |
| Input Voltage Noise | 12 nV/√Hz at f = 10 kHz - preserves SNR in low-amplitude sensor and microphone signal chains. |
| Input Common-Mode Range | –0.2 V to 3.9 V (VS = 5 V) - permits direct interfacing to shunt resistors referenced to ground in current-sense applications. |
| Output Swing | Rail-to-rail (VOL = VS– + 0.02 V, VOH = VS+ – 0.1 V at RL = 5 kΩ) - maximizes dynamic range for 12-bit+ ADC drivers. |
| Harmonic Distortion | HD2 = –131 dBc, HD3 = –143 dBc at 10 kHz, 2 VPP - meets fidelity requirements for audio and metrology-grade signal conditioning. |
Pinout & Package
OPA2834IDGKT is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm body size), optimized for compact PCB layouts and thermal efficiency in portable and industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VOUT1 | Amplifier 1 output | Delivers rail-to-rail linear output; drives ADC inputs or downstream filters with minimal headroom loss. |
| 2 - VIN1– | Amplifier 1 inverting input | Accepts feedback signals; used in inverting configurations with VREF within –0.2 V to 3.9 V (5-V supply). |
| 3 - VIN1+ | Amplifier 1 noninverting input | Direct sensor or signal source connection point; supports input down to –0.2 V relative to VS–. |
| 4 - VS– | Negative power supply | Ground reference for single-supply operation; must be stable and low-impedance to maintain CMRR > 86 dB. |
| 5 - VIN2+ | Amplifier 2 noninverting input | Independent channel input; enables dual-path signal processing (e.g., differential pair or stereo preamp). |
| 6 - VIN2– | Amplifier 2 inverting input | Supports matched gain-setting with Channel 1; crosstalk < –130 dBc ensures channel isolation. |
| 7 - VOUT2 | Amplifier 2 output | Second independent output; shares same AC/DC specs as VOUT1 for synchronized dual-channel designs. |
| 8 - VS+ | Positive power supply | Accepts 2.7–5.4 V; PSRR = 86–103 dB ensures immunity to supply ripple in noisy embedded environments. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power | 170 µA/ch at 5 V enables dual op-amp use in <1-mA total analog subsystems - critical for coin-cell or energy-harvesting devices. |
| Negative-rail input | –0.2 V input capability allows direct ground-referenced current-shunt monitoring without level-shifting circuitry. |
| Rail-to-rail output | Swings within 20 mV of VS– and 100 mV of VS+ into 5-kΩ load - preserves full-scale resolution when driving 12-bit+ SAR ADCs. |
| Low distortion | –131 dBc HD2 / –143 dBc HD3 at 10 kHz ensures fidelity in audio preamps and precision data acquisition front-ends. |
| Wide temperature range | Specified from –40°C to +125°C - qualified for under-hood automotive sensors and industrial motor control feedback loops. |
Applications
| Low-Side Current Sensing | Portable Audio Pre-Amplification |
|---|---|
|
Use Scenario: Monitoring battery discharge current in handheld medical devices using a ground-referenced shunt resistor. IC Role / Device Role / Timing Role: Dual-channel OPA2834IDGKT configures one amplifier as a precision current-sense amplifier and the other as a filter or buffer stage. Use Value: –0.2-V input range eliminates need for charge-pump biasing; 170-µA/channel minimizes impact on battery life. |
Use Scenario: Boosting electret microphone output in Bluetooth earbuds before ADC sampling. IC Role / Device Role / Timing Role: Single OPA2834IDGKT channel provides low-noise, low-distortion gain with rail-to-rail swing into 1-Vpp ADC input range. Use Value: 12-nV/√Hz noise and –131-dBc HD2 preserve voice clarity; 50-MHz bandwidth accommodates ultrasonic touch detection. |
| Low-Power SAR ADC Driver | Industrial Sensor Signal Conditioning |
|
Use Scenario: Driving ADS7056 14-bit SAR ADC in a wireless condition-monitoring node powered by a Li-SOCl₂ battery. IC Role / Device Role / Timing Role: OPA2834IDGKT buffers and gains sensor signals while settling fully within 88 ns to meet ADS7056's 1-MSPS timing window. Use Value: 88-ns 0.1% settling time and 26-V/µs slew rate ensure accurate sampling; 170-µA IQ extends node lifetime to >5 years. |
Use Scenario: Amplifying thermocouple or RTD outputs in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: One OPA2834IDGKT channel conditions sensor voltage; second handles reference buffering or diagnostics. Use Value: –40°C to +125°C operation and 1.2-µV/°C offset drift ensure accuracy across harsh factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2835IDGKT | Higher bandwidth (56 MHz), higher IQ (250 µA/ch), lower input noise (9.4 nV/√Hz) | Better suited for higher-frequency audio or faster ADCs where power budget allows +80 µA/channel | Select OPA2835IDGKT when bandwidth >50 MHz is required and 80-µA extra per channel is acceptable. |
| OPA2836IDGKT | Higher bandwidth (205 MHz), higher IQ (1 mA/ch), lower distortion (–118 dBc HD3) | Targeted at high-speed data acquisition and RF IF amplification, not ultra-low-power portable systems | Choose OPA2836IDGKT only when >100-MHz signal chain performance justifies 5.9× higher quiescent current. |
Compared with OPA2834IDGKT, OPA2835IDGKT trades 80 µA extra current for 6-MHz bandwidth uplift and improved noise, while OPA2836IDGKT sacrifices ultra-low power entirely for RF-grade speed - making OPA2834IDGKT the optimal balance for battery-critical, 50-MHz-class precision analog front-ends.
Availability
OPA2834IDGKT is available at Aetrix Electronics and suitable for current sensing in power supplies, low-power signal conditioning, and portable voice recorders requiring stable component supply across extended production lifecycles.
Supply support for OPA2834IDGKT 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The OPA2834IDGKT belongs to TI's precision, low-power operational amplifier portfolio - engineered specifically for high-fidelity, energy-efficient signal conditioning in battery-operated and thermally constrained systems.
FAQ
What is the minimum supply voltage for reliable operation of the OPA2834IDGKT?
The OPA2834IDGKT operates reliably from 2.7 V to 5.4 V on a single supply, or ±1.35 V to ±2.7 V on split supplies. At 2.7 V, it maintains 9-MHz large-signal bandwidth and 17-V/µs slew rate - verified across –40°C to +125°C per TI SBOS973A datasheet Section 7.5.
Does the OPA2834IDGKT support true rail-to-rail input?
No - the OPA2834IDGKT features negative-rail input (down to –0.2 V below VS–) and rail-to-rail output, but its positive input limit is VS+ – 1.1 V. This architecture prioritizes low distortion and input stage robustness over full rail-to-rail input, as confirmed in Section 8.3.1 of the datasheet.
Can the OPA2834IDGKT drive a 100-Ω load without performance degradation?
Driving 100 Ω is outside the specified test conditions (RL = 5 kΩ). While the OPA2834IDGKT can source/sink up to ±28 mA linearly, output swing degrades significantly below 1-kΩ loads - see Figure 41 in SBOS973A. For 100-Ω loads, consider OPA2836IDGKT or add an external buffer stage.
How does temperature affect input offset voltage in the OPA2834IDGKT?
The OPA2834IDGKT exhibits typical input offset drift of 1.2 µV/°C over –40°C to +125°C, with maximum drift of 5 µV/°C. At 125°C, max VOS increases to 2.1 mV - validated in Section 7.5 DC PERFORMANCE and Figure 34 of SBOS973A.
Is the OPA2834IDGKT pin-compatible with other devices in the OPA283x family?
Yes - all OPA283x dual op-amps (OPA2834/2835/2836/2837) share identical 8-pin VSSOP (DGK) pinout and footprint per TI's orderable addendum. However, electrical differences (bandwidth, IQ, noise) require schematic validation before substitution.
OPA2834IDGKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 26V/µs
- Gain Bandwidth Product:
- 20 MHz
- -3db Bandwidth:
- 20 MHz
- Current - Input Bias:
- 50 nA
- Voltage - Input Offset:
- 350 µV
- Current - Supply:
- 170µA (x2 Channels)
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.4 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2834IDGKT FAQ
1.How can I place an order for OPA2834IDGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2834IDGKT 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 OPA2834IDGKT reliable?
The price and inventory of OPA2834IDGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2834IDGKT is usually 5 days.
3.What payment methods are accepted for OPA2834IDGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2834IDGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2834IDGKT?
OPA2834IDGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2834IDGKT 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 OPA2834IDGKT?
For technical support, including OPA2834IDGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2834IDGKT requirements.
6.How does Aetrix verify that OPA2834IDGKT is sourced from the original manufacturer or authorized distributors?
All OPA2834IDGKT 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 OPA2834IDGKT meets industry standards.
7.What is the process for return or replacement of OPA2834IDGKT?
All OPA2834IDGKT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2834IDGKT, 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 OPA2834IDGKT part is unused and in its original packaging.
Return procedure for OPA2834IDGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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