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Texas Instruments VCA822IDR
- Part No.:
- VCA822IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
VCA822IDR.pdf
- Description:
- IC VARIABLE GAIN 1 CIRC 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,617
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Product details
Overview
VCA822IDR from Texas Instruments is a DC-coupled, wideband variable gain amplifier (VGA) with linear-in-V/V gain control, 150-MHz small-signal bandwidth at +10 V/V gain, 1700 V/μs slew rate, and >40-dB gain adjust range. It performs differential-to-single-ended conversion in high-speed video, pulse amplitude compensation, and differential equalization systems.
For engineers reviewing the VCA822IDR datasheet, VCA822IDR pinout, VCA822IDR application, or VCA822IDR equivalent, key selection criteria include gain linearity (±0.3 dB at 20 dB max), output drive capability (±160 mA), 0.1-dB flatness to 28 MHz, and dual SOIC-14 / VSSOP-10 package options for layout flexibility.
Technical Context
The VCA822IDR integrates two input buffers and a current-feedback output stage with an internal multiplier core, eliminating need for external buffering. Its gain is set externally via RG and RF resistors, supporting nominal maximum gains from +2 V/V to +100 V/V.
Gain control is linear in V/V across VG = –1 V to +1 V, delivering precise attenuation (e.g., –24 dB at VG = –0.9 V relative to max gain) with low distortion (–68 dBc 3rd-harmonic at 20 MHz). It operates from ±5-V supplies with quiescent current of 34–38 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW | 150 MHz at AVMAX = +10 V/V - supports high-fidelity analog signal paths up to UHF |
| Slew rate | 1700 V/μs - enables clean 5-VPP large-signal response at 137 MHz |
| Gain adjust range | >40 dB - provides wide dynamic control without cascading stages |
| Gain flatness | 0.1 dB to 28 MHz - ensures minimal amplitude distortion in baseband video |
| Output current | ±160 mA - drives 5-Ω loads or multiple 75-Ω video lines directly |
| Input noise | 8.2 nV/√Hz - preserves SNR in low-level signal amplification |
| Supply voltage | ±3.5 V to ±6.5 V - compatible with standard ±5-V analog rails |
Pinout & Package
Available in SOIC-14 (8.65 mm × 3.91 mm) and VSSOP-10 (3.00 mm × 3.00 mm) packages. Pin functions are identical across both variants except for NC and VREF placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +VIN / –VIN | Differential input pair | Accepts balanced analog signals; common-mode range extends to rails |
| +RG / –RG | Gain set resistor terminals | Defines maximum gain AVMAX = 2 × (RF / RG); sets transconductance scaling |
| FB | Feedback resistor connection | Completes closed-loop gain path; connects to RF for gain setting |
| VG | Gain control voltage input | Linear-in-V/V control: 1 V → AVMAX, –1 V → ~0.1×AVMAX |
| VOUT | Single-ended output | Delivers amplified signal with ±160 mA drive; rail-to-rail swing capability |
| +VCC / –VCC | Power supply pins | Supports ±5-V operation; thermal design must account for RθJA = 90.3°C/W (SOIC) |
| GND | Analog ground reference | Low-impedance return for input/output signals and bias currents |
Key Features
| Feature | Design Value |
|---|---|
| Differential input, single-ended output | Eliminates need for external balun or op-amp buffer in line-receiver designs |
| DC-coupled architecture | Preserves low-frequency content down to 0 Hz-critical for pulse amplitude and video DC restoration |
| High output current (±160 mA) | Drives heavy capacitive loads (e.g., 100 pF) or multiple 75-Ω cables without external drivers |
| 0.1-dB gain flatness to 28 MHz | Meets broadcast video specs (e.g., SMPTE 259M) without post-equalization |
| Gain linearity ±0.3 dB (20 dB max) | Enables accurate automatic gain control (AGC) in instrumentation and test equipment |
Applications
| Differential Line Receivers | Differential Equalizers |
|---|---|
Use Scenario: Receiving high-speed serial video (e.g., HD-SDI) over twisted-pair cable with impedance mismatch and frequency-dependent loss. IC Role / Device Role / Timing Role: Differential-to-single-ended converter with programmable gain to compensate for channel insertion loss. Use Value: Maintains signal integrity by restoring amplitude across 0–1.5 GHz bandwidth using RC-load equalization topology. | Use Scenario: Compensating high-frequency roll-off in PCB traces or backplanes carrying multi-Gbps data. IC Role / Device Role / Timing Role: Active equalizer with adjustable peaking response controlled by VG voltage. Use Value: Enables 100+ MHz flat response using external R/C network (e.g., R = 75 Ω, C = 100 pF) per datasheet Figure 1. |
| Pulse Amplitude Compensation | Variable Attenuators |
Use Scenario: Stabilizing laser diode driver output or radar pulse amplitude despite temperature drift or aging. IC Role / Device Role / Timing Role: Precision VGA in feedback loop of pulsed power system to maintain constant peak amplitude. Use Value: Achieves ±0.3 dB gain accuracy over 0–1 V VG range, enabling sub-1% amplitude regulation. | Use Scenario: Dynamically adjusting signal level in RF test benches or optical transceivers before ADC sampling. IC Role / Device Role / Timing Role: Voltage-controlled attenuator with linear-in-V/V transfer function and wide dynamic range. Use Value: Provides >40 dB attenuation range while preserving phase linearity and minimizing harmonic distortion (–68 dBc). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar variable gain amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VCA821IDR | 420-MHz bandwidth, lower 7.0 nV/√Hz input noise, same SOIC-14/VSSOP-10 packaging | Better suited for higher-frequency IF/RF gain control where bandwidth >200 MHz is required | Select VCA821IDR when small-signal bandwidth >300 MHz is needed; VCA822IDR preferred for video/DC-coupled precision |
| LMH6503MA/NOPB | 40-dB gain range, 1.2 GHz bandwidth, no differential input; requires external input buffer | Used in RF signal chains where AC-coupling and higher frequency are prioritized over DC fidelity | Choose LMH6503MA/NOPB for RF front-end AGC; VCA822IDR offers integrated differential input and DC coupling |
Compared with VCA822IDR, VCA821IDR delivers 2.8× higher bandwidth but trades off slightly higher quiescent current (42 mA vs. 37 mA), while LMH6503MA/NOPB lacks differential input and DC coupling-requiring additional components for equivalent functionality.
Availability
VCA822IDR is available at Aetrix Electronics and suitable for differential line receivers, pulse amplitude compensation systems, and video equalization circuits requiring stable component supply, long-term manufacturability, and TI-qualified industrial-grade performance.
Supply support for VCA822IDR 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 signal chain and power management ICs.
The VCA822IDR belongs to TI's wideband variable gain amplifier product line, designed specifically for precision analog applications demanding DC coupling, high output drive, and linear-in-V/V gain control in video, test equipment, and communications infrastructure.
FAQ
What is the maximum gain-setting range supported by the VCA822IDR?
The VCA822IDR supports a maximum gain (AVMAX) range of +2 V/V to +100 V/V, set externally using RG and RF resistors per the formula AVMAX = 2 × (RF / RG). This allows flexible configuration for low-gain buffering or high-gain amplification without changing the VCA822IDR itself.
Does the VCA822IDR support DC-coupled operation?
Yes, the VCA822IDR is explicitly designed as a DC-coupled VGA. Its input common-mode range extends to the supply rails, and it maintains gain accuracy and linearity from 0 Hz, making it suitable for pulse amplitude compensation and video DC restoration where AC coupling would distort low-frequency content.
What is the recommended supply voltage for the VCA822IDR?
The VCA822IDR is characterized for operation from ±5-V supplies, with absolute maximum ratings of ±6.5 V. The recommended operating range is ±3.5 V to ±6.5 V. Operation at ±5 V ensures full specification compliance including 150-MHz bandwidth, 1700 V/μs slew rate, and ±160 mA output current.
How does gain control linearity perform across temperature for the VCA822IDR?
At AVMAX = +10 V/V and 0 < VG < 1 V, the VCA822IDR exhibits ±0.34 dB gain deviation over 0°C to +70°C and ±0.37 dB over –40°C to +85°C. This tight linearity enables robust automatic gain control in industrial environments without recalibration.
Can the VCA822IDR drive 75-Ω video loads directly?
Yes, the VCA822IDR delivers ±160 mA output current and supports ±3.7 V swing into 100-Ω loads. When configured for unity or moderate gain, it can directly drive one or more 75-Ω video loads (e.g., composite or component video) with minimal external components, as validated in TI's SBOS343D typical application circuits.
VCA822IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Variable Gain
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1700V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 168 MHz
- Current - Input Bias:
- 19 µA
- Voltage - Input Offset:
- 4 mV
- Current - Supply:
- 36mA
- Current - Output / Channel:
- 160 mA
- Voltage - Supply Span (Min):
- 7 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
VCA822IDR FAQ
1.How can I place an order for VCA822IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for VCA822IDR 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 VCA822IDR reliable?
The price and inventory of VCA822IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VCA822IDR is usually 5 days.
3.What payment methods are accepted for VCA822IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VCA822IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VCA822IDR?
VCA822IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VCA822IDR 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 VCA822IDR?
For technical support, including VCA822IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VCA822IDR requirements.
6.How does Aetrix verify that VCA822IDR is sourced from the original manufacturer or authorized distributors?
All VCA822IDR 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 VCA822IDR meets industry standards.
7.What is the process for return or replacement of VCA822IDR?
All VCA822IDR units undergo pre-shipment inspection (PSI). If there is an issue with VCA822IDR, 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 VCA822IDR part is unused and in its original packaging.
Return procedure for VCA822IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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