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Texas Instruments OPA2834IDGKR
- Part No.:
- OPA2834IDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2834IDGKR.pdf
- Description:
- IC OPAMP VFB 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,398
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Product details
Overview
OPA2834IDGKR 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 battery-constrained systems such as portable voice recorders and low-power SAR ADC drivers.
For engineers reviewing the OPA2834IDGKR datasheet, OPA2834IDGKR pinout, OPA2834IDGKR application, or OPA2834IDGKR equivalent, key selection criteria include input voltage range (–0.2 V to 3.9 V on 5-V supply), –131 dBc HD2 at 10 kHz, 88 ns 0.1% settling time, and VSSOP-8 package compatibility with space-sensitive PCB layouts.
Technical Context
The OPA2834IDGKR employs a bipolar input stage optimized for low noise (12 nV/√Hz) and low distortion while maintaining rail-to-rail output swing within 100 mV of supply rails under 5-kΩ load. Its input common-mode range extends 0.2 V below VS–, supporting true single-supply low-side current sensing without level-shifting circuitry.
Designed for unity-gain stability and minimal phase margin degradation, it maintains flat frequency response up to 50 MHz with G = 1 and exhibits predictable gain peaking behavior when feedback resistors exceed 10 kΩ - a critical consideration for precision low-power filter and buffer designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 50 MHz at G = 1 - enables high-fidelity amplification of signals up to audio and early RF bands without external compensation. |
| Quiescent Current | 170 µA/ch - allows continuous operation in always-on sensor nodes powered by coin cells or energy harvesters. |
| Slew Rate | 26 V/µs - supports clean 2-V step response in ≤88 ns, critical for driving fast ADC inputs without distortion. |
| Input Voltage Noise | 12 nV/√Hz at 10 kHz - preserves SNR in microphone preamplifier and precision transducer interfaces. |
| Input Offset Voltage | 350 µV (max ±1.9 mV) - ensures <1 LSB error in 12-bit SAR ADC driver applications with mid-supply reference. |
| Common-Mode Range | –0.2 V to VS+ – 1.1 V - permits direct connection to shunt resistors referenced to ground in low-side current monitoring. |
| Operating Temp | –40°C to +125°C - qualified for industrial and automotive cabin electronics where ambient thermal stress is present. |
Pinout & Package
VSSOP-8 (DGK) package: 3.00 mm × 3.00 mm body, 0.65 mm lead pitch, thermally enhanced exposed pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VOUT1 | Amplifier 1 output | Drives loads down to 5 kΩ with rail-to-rail swing; requires local 0.1-µF bypass capacitor for stability. |
| 2 - VIN1– | Amplifier 1 inverting input | Accepts differential signals; must remain within VICR (–0.2 V to VS+ – 1.1 V) to avoid clipping or CMRR degradation. |
| 3 - VIN1+ | Amplifier 1 noninverting input | Primary signal entry point in noninverting configurations; high-impedance node sensitive to PCB leakage and EMI. |
| 4 - VS– | Negative supply rail | Ground reference for single-supply operation; connects to system GND or negative rail in split-supply setups. |
| 5 - VIN2+ | Amplifier 2 noninverting input | Independent channel input; shares no internal coupling with Channel 1 - validated crosstalk < –130 dBc at 100 kHz. |
| 6 - VIN2– | Amplifier 2 inverting input | Used for differential gain stages or inverting buffers; matched input bias current minimizes offset drift in matched resistor networks. |
| 7 - VOUT2 | Amplifier 2 output | Functionally identical to Pin 1; supports independent dual-path signal chains without inter-channel interference. |
| 8 - VS+ | Positive supply rail | Accepts 2.7–5.4 V; decoupling to VS– is mandatory within 5 mm of pin to suppress supply-induced oscillation. |
Key Features
| Feature | Design Value |
|---|---|
| Negative-rail input | Enables direct interface to ground-referenced shunts in power supply current monitors without level shifters or biasing networks. |
| Rail-to-rail output | Delivers full dynamic range into 5-kΩ loads - maximizes ADC utilization and reduces need for external gain staging. |
| Ultra-low distortion | HD2 = –131 dBc / HD3 = –143 dBc at 10 kHz supports high-fidelity audio front-ends and metrology-grade data acquisition. |
| Low-noise bipolar input | 12 nV/√Hz input voltage noise combined with 0.2 pA/√Hz current noise optimizes performance with medium-impedance sources (<10 kΩ). |
| Wide supply range | Operates from 2.7 V to 5.4 V single supply or ±1.35 V to ±2.7 V dual supply - simplifies design reuse across 3.3-V and 5-V system domains. |
Applications
| Low-Side Current Sensing | Portable Voice Recorder Front-End |
|---|---|
Use Scenario: Monitoring battery discharge current in handheld medical devices using a 10-mΩ shunt resistor placed between load and ground. IC Role / Device Role / Timing Role: Amplifies mV-level differential voltage across shunt with gain = 100, rejecting common-mode noise from switching regulators. Use Value: Input range extending to –0.2 V allows direct connection to shunt without offset injection; 170 µA IQ extends battery life beyond 12 months in sleep-wake cycles. | Use Scenario: Pre-amplifying electret microphone output in a Bluetooth headset with 3.3-V supply and tight thermal envelope. IC Role / Device Role / Timing Role: First-stage gain block with G = 20, AC-coupled to suppress DC offset and minimize pop noise during power-up. Use Value: 12 nV/√Hz noise floor preserves SNR >65 dB(A); rail-to-rail output drives 10-kΩ input of codec ADC without attenuation. |
| Low-Power SAR ADC Driver | Industrial Sensor Signal Conditioning |
Use Scenario: Driving ADS7056 14-bit SAR ADC in a wireless temperature node powered by CR2032 battery. IC Role / Device Role / Timing Role: Buffer and level-shift stage ensuring 0.1% settling in <100 ns before ADC sampling window opens. Use Value: 88 ns 0.1% settling time meets ADS7056's 1-MSPS timing budget; 170 µA IQ contributes <1% to total system quiescent load. | Use Scenario: Conditioning output of a 4–20 mA loop-powered pressure transmitter operating at –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Transimpedance amplifier converting current to voltage, followed by gain and filtering prior to isolation barrier. Use Value: –40°C to +125°C rating ensures operation across full industrial range; 1.9 mV max VOS avoids calibration drift over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2835IDGKR | 56 MHz GBW, 250 µA/ch IQ, 9.4 nV/√Hz noise - higher speed and lower noise at increased power cost. | Better suited for 200-kSPS+ data loggers requiring lower THD; less optimal for sub-100-µA ultra-low-power nodes. | Select OPA2835IDGKR when bandwidth >50 MHz or noise <10 nV/√Hz is required and 47% higher IQ is acceptable. |
| OPA2836IDGKR | 205 MHz GBW, 1 mA/ch IQ, 4.6 nV/√Hz noise - wideband, low-noise, but 6× higher quiescent current. | Targeted at high-resolution oscilloscope front-ends or RF IF stages, not battery-constrained portable systems. | Choose OPA2836IDGKR only when >100 MHz bandwidth is mandatory and power budget exceeds 1 mA per channel. |
Compared with OPA2834IDGKR, OPA2835IDGKR trades 47% higher IQ for +6 MHz bandwidth and –2.6 nV/√Hz noise, while OPA2836IDGKR sacrifices 6× more current for >4× bandwidth - making OPA2834IDGKR the optimal balance for 50-MHz-class, sub-200-µA applications.
Availability
OPA2834IDGKR 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 OPA2834IDGKR 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, with over 50 years of innovation in precision amplifiers and data converters.
The OPA2834IDGKR belongs to TI's ultra-low-power, high-speed op amp product line - engineered specifically for battery-powered instrumentation, portable medical devices, and energy-efficient industrial sensors where bandwidth-per-microwatt is critical.
FAQ
What is the maximum supply voltage for the OPA2834IDGKR?
The OPA2834IDGKR supports a total supply voltage range of 2.7 V to 5.4 V for single-supply operation, or ±1.35 V to ±2.7 V for dual-supply use. Absolute maximum ratings specify VS+ to VS– must not exceed 5.5 V; exceeding this risks permanent damage. Operation at 5.4 V is fully characterized and supported across –40°C to +125°C ambient temperature.
Does the OPA2834IDGKR support rail-to-rail input?
No - the OPA2834IDGKR features negative-rail input and rail-to-rail output (RRO), not rail-to-rail input. Its input common-mode range extends to –0.2 V below VS– but only to VS+ – 1.1 V. This architecture enables true ground-sensing capability while maintaining high CMRR, unlike full RRI op amps that compromise input stage linearity near the positive rail.
Can the OPA2834IDGKR drive a 100-pF capacitive load directly?
The OPA2834IDGKR is not unity-gain stable into pure capacitive loads >20 pF without external compensation. Driving 100-pF loads requires series output resistance (RO ≈ 50–100 Ω) or a small isolation resistor plus feedback capacitor (e.g., 10 Ω + 1–2 pF) to maintain phase margin >45°, as confirmed in Figure 40 and Section 8.3.3 of the SBOS973A datasheet.
What is the typical harmonic distortion performance of the OPA2834IDGKR at 100 kHz?
At f = 100 kHz and VO = 2 VPP, the OPA2834IDGKR achieves HD2 = –104 dBc and HD3 = –118 dBc (G = 1, RL = 5 kΩ, VS = 5 V), as shown in Figure D110. This performance degrades slightly at lower supply voltages - at 3 V, HD2 is –100 dBc and HD3 is –115 dBc under identical conditions - due to reduced slew rate and output headroom.
Is the OPA2834IDGKR pin-compatible with other VSSOP-8 op amps like the OPA2333?
No - the OPA2834IDGKR has a unique pinout optimized for dual-channel symmetry and low crosstalk: VOUT1/VIN1–/VIN1+/VS–/VIN2+/VIN2–/VOUT2/VS+. It is not pin-compatible with OPA2333 (which uses V–/OUT1/IN1–/IN1+/V+/IN2–/IN2+/OUT2) or other general-purpose VSSOP-8 op amps. PCB layout must follow the DGK package map in Section 6 of SBOS973A.
OPA2834IDGKR 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
OPA2834IDGKR FAQ
1.How can I place an order for OPA2834IDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2834IDGKR 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 OPA2834IDGKR reliable?
The price and inventory of OPA2834IDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2834IDGKR is usually 5 days.
3.What payment methods are accepted for OPA2834IDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2834IDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2834IDGKR?
OPA2834IDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2834IDGKR 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 OPA2834IDGKR?
For technical support, including OPA2834IDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2834IDGKR requirements.
6.How does Aetrix verify that OPA2834IDGKR is sourced from the original manufacturer or authorized distributors?
All OPA2834IDGKR 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 OPA2834IDGKR meets industry standards.
7.What is the process for return or replacement of OPA2834IDGKR?
All OPA2834IDGKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2834IDGKR, 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 OPA2834IDGKR part is unused and in its original packaging.
Return procedure for OPA2834IDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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