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Texas Instruments OPA4820IDG4
- Part No.:
- OPA4820IDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4820IDG4.pdf
- Description:
- IC OPAMP VFB 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,515
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Product details
Overview
OPA4820IDG4 from Texas Instruments is a quad, unity-gain stable, voltage-feedback operational amplifier optimized for high-speed, low-noise analog signal conditioning. It delivers 220MHz bandwidth at G = +2, ±85mA output current, 2.5nV/√Hz input voltage noise, and operates from ±2V to ±6.3V dual or +4V to +12.6V single supply - enabling use in ADC preamplifiers, video line drivers, and portable test equipment.
For engineers reviewing the OPA4820IDG4 datasheet, OPA4820IDG4 pinout, OPA4820IDG4 application, or OPA4820IDG4 equivalent, key selection criteria include its 0.01%/0.03° dG/dP performance for composite video, >600MHz unity-gain bandwidth, ±0.8mV max input offset voltage at 25°C, rail-compatible output swing on +5V supply, and SO-14 package compatibility with legacy designs.
Technical Context
The OPA4820IDG4 employs a voltage-feedback architecture with unity-gain stability and minimal peaking (<1 dB at G = +1). Its internal compensation supports wideband operation while maintaining DC precision via low input offset voltage (±0.8mV max) and offset current (±500nA max) across −40°C to +85°C.
It features matched differential input impedance (18 kΩ || 0.8 pF), common-mode rejection of 85 dB (min), and closed-loop output impedance of 0.04 Ω below 100 kHz - enabling accurate gain-setting and low-distortion driving of 100Ω loads in high-density analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth (G = +2) | 220 MHz min - supports high-fidelity amplification of video, CCD, and baseband signals up to ~100 MHz fundamental. |
| Input Voltage Noise | 2.5 nV/√Hz typ - enables low-noise preamplification of weak sensor or optical channel signals without degrading SNR. |
| Output Current | ±85 mA min - drives 100Ω loads with >2 VPP swing on ±5V supply, sufficient for ADC input buffering and line termination. |
| Input Offset Voltage (25°C) | ±0.8 mV max - ensures <0.02% absolute DC error in pulse amplifiers and active filters requiring precise baseline stability. |
| Differential Gain/Phase | 0.003% / 0.06° typ - meets NTSC/PAL composite video line driver specs without external calibration. |
| Supply Range | ±2V to ±6.3V dual or +4V to +12.6V single - allows direct integration into portable test gear and industrial AFEs using standard 5V or 12V rails. |
| Slew Rate | 240 V/µs min - preserves fast edge integrity in pulse and imaging applications with ≤2 ns rise time. |
Pinout & Package
OPA4820IDG4 is packaged in a 14-pin SOIC (SO-14) with industry-standard quad op amp pinout. The package is RoHS-compliant, surface-mountable, and rated for −45°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Drives external load; capable of ±85mA sourcing/sinking into 100Ω with <1% THD at 1MHz. |
| 2 (−IN A) | Inverting input A | High-impedance node; requires matched DC impedance to +IN A for bias current cancellation in precision circuits. |
| 3 (+IN A) | Noninverting input A | DC-biased reference point in single-supply configurations; supports 0.9V to 4.4V common-mode range on +5V supply. |
| 4 (−V) | Negative supply rail | Connects to ground or negative rail; must be decoupled with 2.2µF + 0.1µF capacitors per TI layout guidelines. |
| 5 (+IN C) | Noninverting input C | Independent input for third amplifier; shares same CMIR and noise specs as channels A/B/D. |
| 6 (−IN C) | Inverting input C | Configurable for inverting gain stages; supports 50Ω source matching when used with RM resistor per Figure 2. |
| 7 (OUT C) | Amplifier C output | Electrically identical to OUT A; enables simultaneous processing of multiple analog channels in compact AFEs. |
| 8 (OUT A) | Amplifier A output (redundant label) | Not applicable - pin 1 is primary OUT A; pin 8 is NC in SO-14 per TI SBOS317D pin diagram. |
| 9 (−IN A) | Inverting input A (redundant label) | Not applicable - pin 2 is primary −IN A; pin 9 is NC in SO-14 per TI SBOS317D pin diagram. |
| 10 (+IN A) | Noninverting input A (redundant label) | Not applicable - pin 3 is primary +IN A; pin 10 is NC in SO-14 per TI SBOS317D pin diagram. |
| 11 (+V) | Positive supply rail | Accepts +4V to +12.6V single or ±2V to ±6.3V dual; thermal resistance θJA = 100°C/W in SO-14. |
| 12 (+IN B) | Noninverting input B | Supports independent biasing; used in differential receiver configurations with matched +IN D for common-mode rejection. |
| 13 (−IN B) | Inverting input B | Paired with −IN D for fully differential output stages; maintains <−61dB crosstalk at 5MHz between driven channels. |
| 14 (OUT B) | Amplifier B output | Provides fourth independent output; shares AC/DC specs with other channels - enables 4-channel CCD or optical amplifier arrays. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable wideband operation | Delivers >600MHz bandwidth at G = +1 with <1dB peaking - eliminates need for external compensation in high-speed buffers. |
| Low-noise, low-power architecture | 2.5nV/√Hz input voltage noise at 5.7mA/ch quiescent current - achieves better noise-efficiency than competing 200MHz op amps. |
| Single-supply video-grade linearity | 0.01%/0.03° dG/dP supports cost-sensitive composite video drivers without external trimming or feedback networks. |
| Flexible supply interface | Operates from +5V single supply with >2VPP output swing - simplifies power design in portable instrumentation and embedded AFEs. |
| Quad-channel isolation | <−61dB input-referred crosstalk at 5MHz with three channels driven - enables independent signal paths in multi-channel data acquisition. |
Applications
| ADC Preamplifier | Composite Video Line Driver |
|---|---|
Use Scenario: Amplifying low-level sensor outputs prior to sampling by 12–16-bit SAR or pipeline ADCs in portable test equipment. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate buffer that preserves signal integrity and minimizes aperture jitter-induced noise. Use Value: 2.5nV/√Hz input noise and 240V/µs slew rate enable full-scale resolution at ≥10 MSPS without SNR degradation. | Use Scenario: Driving 75Ω coaxial video lines in security cameras or broadcast monitors using NTSC/PAL standards. IC Role / Device Role / Timing Role: Final-stage line driver delivering 1.4VPP into 150Ω load with minimal differential gain/phase distortion. Use Value: 0.003%/0.06° dG/dP ensures color fidelity and sync stability without external calibration components. |
| CCD Imaging Channel Amplifier | Low-Power Baseband Amplifier |
Use Scenario: Conditioning pixel charge outputs from linear or area CCD sensors in medical imaging or machine vision systems. IC Role / Device Role / Timing Role: High-output-current, low-noise transimpedance or gain stage converting photodiode current to clean voltage. Use Value: ±85mA drive capability supports fast settling of large capacitive CCD outputs; 22ns 0.02% settling time enables high frame rates. | Use Scenario: Signal conditioning in battery-powered IoT sensor nodes requiring extended runtime and sub-100µV offset stability. IC Role / Device Role / Timing Role: Precision gain block for thermocouple, strain gauge, or MEMS sensor interfaces operating from +5V rail. Use Value: ±0.8mV max input offset and 8µV/°C drift maintain accuracy over temperature without auto-zero circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, low-noise operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4820IDR | Same silicon die, tape-and-reel packaging (2500 pcs), identical electrical specs and SO-14 footprint. | No functional difference; selected for automated SMT assembly vs. rail-packaged IDG4. | Choose OPA4820IDR for volume production; OPA4820IDG4 for prototyping or low-volume hand-soldering. |
| OPA4354IPW | CMOS-input, rail-to-rail output, lower bandwidth (200MHz G=+2), higher input bias current (±0.5pA), 6mA/ch supply current. | Better for ultra-low-power, single-supply systems needing RRO swing but sacrificing noise (7nV/√Hz) and video linearity. | Choose OPA4354IPW only if rail-to-rail output is mandatory and dG/dP <0.01% is not required. |
Compared with OPA4820IDR, the OPA4820IDG4 offers identical performance in a tube-packaged format suitable for evaluation and small-batch builds; versus OPA4354IPW, it provides superior noise, video distortion, and output drive at the cost of non-RRO output swing and slightly higher supply current.
Availability
OPA4820IDG4 is available at Aetrix Electronics and suitable for ADC preamplifiers, composite video line drivers, CCD imaging channel amplifiers, and low-power baseband amplifiers requiring stable component supply across industrial, medical, and test equipment programs.
Supply support for OPA4820IDG4 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 OPA4820IDG4 belongs to TI's high-speed, low-noise operational amplifier product line, designed specifically for demanding analog signal conditioning in video, imaging, test equipment, and high-resolution data acquisition systems.
FAQ
What is the maximum supply voltage rating for the OPA4820IDG4?
The OPA4820IDG4 has an absolute maximum supply voltage rating of ±6.5V for dual supply or +13V for single supply. Its specified operating range is ±2V to ±6.3V dual or +4V to +12.6V single. Exceeding ±6.5V or +13V risks permanent damage per TI SBOS317D Absolute Maximum Ratings table. Always observe derating guidelines for reliability in continuous operation.
Does the OPA4820IDG4 support true rail-to-rail output swing?
No, the OPA4820IDG4 is not a rail-to-rail output amplifier. On ±5V supply, its output swings to within ±1.3V of each rail (±3.7V min), and on +5V single supply, it delivers >2VPP swing with 1.3V headroom to each rail. This is sufficient for most ADC inputs and video loads but does not reach the supply rails like CMOS-output op amps such as the OPA4354.
Can the OPA4820IDG4 be used in single-supply configurations?
Yes, the OPA4820IDG4 is explicitly characterized for single-supply operation from +4V to +12.6V. TI provides reference circuits (Figures 3 and 4 in SBOS317D) showing AC-coupled +5V configurations with midpoint biasing, achieving >2VPP output swing into 100Ω while maintaining low distortion and 0.01%/0.03° dG/dP for video applications.
What is the input common-mode voltage range for the OPA4820IDG4 on +5V supply?
On a +5V single supply, the OPA4820IDG4 supports an input common-mode voltage range of 0.9V to 4.4V (min) at 25°C, as specified in the Electrical Characteristics table for VS = +5V. This allows direct interfacing with 2.5V-biased sources and accommodates typical ADC reference levels without level-shifting circuitry.
How does the OPA4820IDG4 compare to the OPA4650 in terms of upgrade path?
The OPA4820IDG4 is positioned as an OPA4650 upgrade per TI documentation, offering higher bandwidth (220MHz vs. 150MHz G=+2), lower input noise (2.5nV/√Hz vs. 4.5nV/√Hz), improved dG/dP (0.003%/0.06° vs. 0.02%/0.2°), and lower supply current (5.7mA/ch vs. 7.5mA/ch). These improvements make the OPA4820IDG4 suitable for next-generation video, imaging, and high-speed data acquisition where signal fidelity and power efficiency are critical.
OPA4820IDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 4
- Output Type:
- Differential
- Slew Rate:
- 240V/µs
- Gain Bandwidth Product:
- 250 MHz
- -3db Bandwidth:
- 650 MHz
- Current - Input Bias:
- 9 µA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 22.6mA
- Current - Output / Channel:
- 85 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 12.6 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
OPA4820IDG4 FAQ
1.How can I place an order for OPA4820IDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4820IDG4 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 OPA4820IDG4 reliable?
The price and inventory of OPA4820IDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4820IDG4 is usually 5 days.
3.What payment methods are accepted for OPA4820IDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4820IDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4820IDG4?
OPA4820IDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4820IDG4 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 OPA4820IDG4?
For technical support, including OPA4820IDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4820IDG4 requirements.
6.How does Aetrix verify that OPA4820IDG4 is sourced from the original manufacturer or authorized distributors?
All OPA4820IDG4 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 OPA4820IDG4 meets industry standards.
7.What is the process for return or replacement of OPA4820IDG4?
All OPA4820IDG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4820IDG4, 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 OPA4820IDG4 part is unused and in its original packaging.
Return procedure for OPA4820IDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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