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Texas Instruments OPA2822U
- Part No.:
- OPA2822U
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2822U.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:441
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Product details
Overview
OPA2822U from Texas Instruments is a dual, wideband, low-noise voltage-feedback operational amplifier designed for xDSL differential line receivers and high-dynamic-range ADC drivers. It delivers 2.0nV/√Hz input voltage noise, 500MHz unity-gain bandwidth, and –100dBc 3rd-harmonic distortion at 1MHz with 2VPP differential output - enabling >14-bit dynamic range in baseband I/Q receiver channels.
For engineers reviewing the OPA2822U datasheet, OPA2822U pinout, OPA2822U application, or OPA2822U equivalent, key selection criteria include its low-noise performance under single +5V to ±6V operation, channel-to-channel crosstalk of –95dBc, and stable unity-gain behavior without external compensation - critical for precision integrators and active filters in communications infrastructure.
Technical Context
The OPA2822U employs a voltage-feedback architecture optimized for unity-gain stability and minimal phase shift up to 500MHz. Its differential input stage supports rail-to-rail common-mode input range (±4.8V on ±6V supplies) and achieves 110dB CMRR at ±1V common-mode voltage.
It features matched dual channels with <5µV/°C offset drift and 1.6pA/√Hz input current noise above 1MHz. Output stage delivers ±90mA sourcing/sinking capability into 100Ω loads while maintaining 0.01Ω closed-loop output impedance at 100kHz - essential for driving passive filter networks before codecs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 2.0nV/√Hz at f > 10kHz - enables ultra-low-noise signal conditioning in xDSL receiver front-ends. |
| Unity-Gain Bandwidth | 500MHz - supports wideband small-signal amplification up to 400MHz at G=+1 without peaking. |
| Harmonic Distortion | ≤ –100dBc 3rd-harmonic at 1MHz, 2VPP, RL ≥ 500Ω - ensures SFDR > 100dB for 14-bit+ ADC interfacing. |
| Supply Current | 4.8mA per channel at ±6V - allows dual-channel operation within 9.6mA total quiescent budget. |
| Output Current | ±90mA min into 100Ω - drives heavy passive filter loads between amplifier and codec without gain compression. |
| Common-Mode Rejection | 110dB min at ±1V - maintains signal integrity in noisy mixed-signal environments like DSLAM line cards. |
| Channel Crosstalk | –95dBc at 1MHz input-referred - preserves independent I/Q channel fidelity in quadrature demodulators. |
Pinout & Package
OPA2822U is housed in an SO-8 surface-mount package (Package Designator: D), rated for –40°C to +85°C operation. Thermal resistance θJA is 125°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+VS) | Positive Supply Rail | Accepts +5V to +12V single supply or +6.5V max in split-supply configurations. |
| 2 (Out B) | Channel B Output | Provides full-swing output capable of ±4.7V into 100Ω load on ±6V supplies. |
| 3 (–In B) | Inverting Input B | Differential input node with 7MΩ || 1pF common-mode impedance for balanced signal reception. |
| 4 (+In B) | Noninverting Input B | Matches –In B for DC-coupled I/Q channel matching; supports 1.2V rail margin on +5V supply. |
| 5 (Out A) | Channel A Output | Electrically identical to Out B; enables true differential drive without external coupling components. |
| 6 (–In A) | Inverting Input A | Used with +In A for noninverting configuration; requires matched impedance for bias current cancellation. |
| 7 (+In A) | Noninverting Input A | DC-coupled input with ±4.8V common-mode range; enables single-supply operation down to 1.2V above ground. |
| 8 (–VS) | Negative Supply Rail | Accepts 0V (ground) for single +5V operation or –6.5V max in dual-supply mode. |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise integrator capability | 2.0nV/√Hz voltage noise + 5µV/°C offset drift enables PLL loop filters with sub-100µV drift over temperature. |
| Differential receiver optimization | –100dBc 3rd-harmonic distortion at 1MHz supports >14-bit dynamic range in xDSL line receivers. |
| Single-supply compatibility | Operates from +5V to +12V with input/output swing within 1.2V of rails - eliminates need for level-shifting in +5V systems. |
| High-output-current drive | ±90mA sourcing/sinking into 100Ω allows direct interface to passive RC filters feeding analog codecs. |
| Matched dual-channel performance | –95dBc channel crosstalk and <0.2mV input offset match enable precise I/Q amplitude and phase tracking. |
Applications
| xDSL Differential Line Receivers | High Dynamic Range ADC Drivers |
|---|---|
Use Scenario: Amplifying differential analog signals from twisted-pair telephone lines in ADSL/VDSL modems and DSLAM line cards. IC Role / Device Role / Timing Role: Front-end differential receiver providing gain, noise filtering, and driver stage before analog-to-digital conversion. Use Value: 2.0nV/√Hz input noise and –100dBc harmonic distortion preserve SNR across 5MHz bandwidth for >14-bit effective resolution. | Use Scenario: Driving the input of high-speed pipeline or sigma-delta ADCs in test equipment and communications base stations. IC Role / Device Role / Timing Role: Low-distortion, wideband buffer ensuring full-scale analog input without clipping or spectral contamination. Use Value: 500MHz unity-gain bandwidth and 170V/µs slew rate support clean 10+ MSPS sampling with minimal settling error. |
| Low-Noise PLL Integrators | Precision Baseband I/Q Amplifiers |
Use Scenario: Implementing loop filters in frequency synthesizers for wireless transceivers and clock recovery circuits. IC Role / Device Role / Timing Role: Integrator in charge-pump PLL feedback path requiring ultra-low voltage noise and stable DC accuracy. Use Value: 2.0nV/√Hz noise floor and 5µV/°C offset drift minimize phase jitter and long-term frequency drift in locked state. | Use Scenario: Amplifying in-phase (I) and quadrature (Q) baseband signals in zero-IF receivers for LTE, Wi-Fi, and satellite modems. IC Role / Device Role / Timing Role: Matched dual-channel gain block preserving amplitude/phase relationship between I and Q paths. Use Value: –95dBc channel crosstalk and matched 2.0nV/√Hz noise ensure near-perfect I/Q channel balance up to 5MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-noise op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2686 | 1.3nV/√Hz input noise, 1.2GHz GBW, but only specified for ±5V operation and lacks SO-8 packaging for OPA2822U. | Better noise performance but higher supply sensitivity; not drop-in compatible due to different pinout and thermal profile. | Select OPA2686 only when sub-1.5nV/√Hz noise is mandatory and board layout can accommodate MSOP-8 footprint. |
| THS6062 | 1.5nV/√Hz noise, 220MHz GBW, lower output current (±60mA), and higher quiescent current (6.5mA/ch). | Suitable for lower-bandwidth I/Q amplification but cannot meet 500MHz bandwidth or –100dBc distortion targets of OPA2822U. | Choose THS6062 for cost-sensitive designs where 200MHz bandwidth and –95dBc distortion suffice. |
Compared with OPA2686 and THS6062, the OPA2822U uniquely balances 2.0nV/√Hz noise, 500MHz bandwidth, ±90mA drive, and SO-8 package - making it the only option supporting xDSL receiver requirements across +5V to ±6V supplies without layout redesign.
Availability
OPA2822U is available at Aetrix Electronics and suitable for xDSL line card manufacturing, high-speed data acquisition systems, and precision communications infrastructure requiring stable component supply across extended temperature ranges.
Supply support for OPA2822U 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 specializing in analog and embedded processing technologies, with leadership in high-performance op amps and signal chain solutions.
The OPA2822U belongs to TI's precision wideband op amp product line, engineered specifically for high-dynamic-range communications receivers requiring low noise, low distortion, and robust dual-channel matching.
FAQ
What supply voltage ranges does the OPA2822U support?
The OPA2822U operates from a single +5V to +12V supply or dual ±5V to ±6.5V supplies. Electrical characteristics are fully specified at ±6V and +5V, with guaranteed performance across –40°C to +85°C. The device maintains 2.0nV/√Hz input noise and –100dBc distortion across this full range, making OPA2822U suitable for both legacy +5V systems and newer +12V DSLAM designs.
Does the OPA2822U require external compensation for unity-gain stability?
No, the OPA2822U is internally compensated for unity-gain stability. Its voltage-feedback architecture provides flat frequency response and no peaking up to 500MHz in G=+1 configuration, as verified by small-signal bandwidth testing showing 400MHz typical response with RF = 0Ω. This eliminates the need for external compensation networks, simplifying layout for OPA2822U in high-speed receiver applications.
What is the maximum load the OPA2822U can drive while maintaining –100dBc distortion?
The OPA2822U achieves ≤ –100dBc 3rd-harmonic distortion at 1MHz with 2VPP output into RL ≥ 500Ω loads. At lighter loads (e.g., 1kΩ), distortion improves further; at heavier loads (e.g., 200Ω), 3rd-harmonic degrades to –95dBc. Therefore, for consistent –100dBc performance, OPA2822U should drive ≥500Ω loads - a key constraint when designing passive filter interfaces in xDSL receivers.
How does the OPA2822U perform in differential configurations?
In differential configurations, the OPA2822U delivers matched channel performance with –95dBc input-referred crosstalk at 1MHz and near-identical noise (2.0nV/√Hz) and distortion (≤ –100dBc) on both channels. Differential small-signal bandwidth reaches 500MHz at GD=+1, supporting baseband I/Q amplification up to 5MHz with >14-bit dynamic range - confirmed by TI's differential distortion vs. frequency curves in the OPA2822U datasheet.
Is the OPA2822U pin-compatible with other TI dual op amps like the OPA2690?
No, the OPA2822U is not pin-compatible with OPA2690 or other TI dual op amps. While both use SO-8 packages, OPA2822U has +VS on Pin 1 and –VS on Pin 8, whereas OPA2690 places –VS on Pin 4 and +VS on Pin 8. Swapping them would cause immediate power rail reversal and device failure. Always verify pinout using the official OPA2822U datasheet before PCB layout.
OPA2822U Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 170V/µs
- Gain Bandwidth Product:
- 240 MHz
- -3db Bandwidth:
- 400 MHz
- Current - Input Bias:
- 9 µA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 9.6mA (x2 Channels)
- Current - Output / Channel:
- 150 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:
- 8-SOIC
OPA2822U FAQ
1.How can I place an order for OPA2822U through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2822U 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 OPA2822U reliable?
The price and inventory of OPA2822U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2822U is usually 5 days.
3.What payment methods are accepted for OPA2822U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2822U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2822U?
OPA2822U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2822U 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 OPA2822U?
For technical support, including OPA2822U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2822U requirements.
6.How does Aetrix verify that OPA2822U is sourced from the original manufacturer or authorized distributors?
All OPA2822U 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 OPA2822U meets industry standards.
7.What is the process for return or replacement of OPA2822U?
All OPA2822U units undergo pre-shipment inspection (PSI). If there is an issue with OPA2822U, 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 OPA2822U part is unused and in its original packaging.
Return procedure for OPA2822U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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