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Texas Instruments VCA822IDGSR
- Part No.:
- VCA822IDGSR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
VCA822IDGSR.pdf
- Description:
- IC VARIABLE GAIN 1 CIRC 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,079
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Product details
Overview
VCA822IDGSR from Texas Instruments is a DC-coupled, wideband variable gain amplifier (VGA) with linear-in-V/V gain control, differential input to single-ended output conversion, 150-MHz small-signal bandwidth at +10 V/V, 0.1-dB gain flatness to 28 MHz, and ±160 mA output current. It operates from ±5-V supplies and is used in high-speed differential equalizers, pulse amplitude compensation circuits, and voltage-tunable active filters.
For engineers reviewing the VCA822IDGSR datasheet, VCA822IDGSR pinout, VCA822IDGSR application, or VCA822IDGSR equivalent, key selection criteria include gain linearity over ±0.9 V control range, 1700 V/μs slew rate, 8.2 nV/√Hz input voltage noise, and compatibility with 10-pin VSSOP layout constraints for high-density signal chain designs.
Technical Context
The VCA822IDGSR 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 RG− pins and adjusted linearly by VG across ±1 V, enabling precise analog gain scaling without digital control overhead.
It supports AVMAX configuration from +2 V/V to +100 V/V using RF and RG resistors, delivers 137 MHz large-signal (5 VPP) bandwidth at +10 V/V, and maintains < ±0.3 dB gain deviation over 0–1 V control range at +25°C - critical for closed-loop amplitude stabilization in video and instrumentation systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal bandwidth | 150 MHz at +10 V/V - enables baseband-to-UHF signal processing in test equipment front-ends |
| Slew rate | 1700 V/μs - supports fast transient response for pulse-amplitude-modulated signals up to 137 MHz |
| Gain adjust range | >40 dB - provides wide dynamic range control for automatic gain control (AGC) loops |
| Input voltage noise | 8.2 nV/√Hz - ensures low-noise amplification in sensitive receiver chains |
| Output current | ±160 mA - drives 100 Ω loads directly without external buffer stages |
| Gain flatness | 0.1 dB to 28 MHz - preserves signal integrity in broadband video and comms applications |
| Supply voltage | ±5 V (±3.5 V min) - compatible with standard dual-rail lab and industrial power systems |
Pinout & Package
Package: 10-pin VSSOP (3.00 mm × 3.00 mm), thermally enhanced for high-speed analog operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary analog ground return path; must be low-inductance connection to minimize noise coupling |
| VOUT | Amplified output | Single-ended output capable of ±3.7 V swing into 100 Ω; requires local decoupling |
| –VCC | Negative supply | Accepts –5 V rail; connects to dedicated negative plane for PSRR optimization |
| –VIN | Inverting input | Differential input node; matched impedance required for common-mode rejection |
| –RG | Gain set resistor | Connects to RG resistor bottom; sets nominal gain with +RG to define AVMAX |
| FB | Feedback resistor input | Connects to RF; configures closed-loop gain and bandwidth per external resistor ratio |
| +VCC | Positive supply | Accepts +5 V rail; bypassed with 0.1 μF ceramic near pin for stability |
| VG | Gain control voltage | Analog control input (–1 V to +1 V); 2.6 mA max bias current affects DAC driver design |
| +VIN | Noninverting input | Differential input node; complements –VIN for balanced signal injection |
| +RG | Gain set resistor | Connects to RG resistor top; forms gain-setting network with –RG and RF |
Key Features
| Feature | Design Value |
|---|---|
| DC-coupled architecture | Enables gain control of baseband signals including video sync pulses and low-frequency sensor outputs |
| Linear-in-V/V gain law | Eliminates logarithmic correction circuitry; simplifies AGC loop design with predictable dB/V slope |
| Integrated current-feedback output | Delivers high output current without external drivers, reducing board area and component count |
| High CMRR (60 dB) | Maintains signal fidelity in noisy environments such as industrial motor drive feedback paths |
| Drop-in upgrade to LMH6503 | Direct replacement in legacy designs with identical pinout and improved bandwidth/noise performance |
Applications
| Differential Line Receivers | Differential Equalizers |
|---|---|
Use Scenario: Receiving high-speed LVDS or RS-422 signals over lossy PCB traces or cables with frequency-dependent attenuation. IC Role / Device Role / Timing Role: VGA compensates for channel loss by boosting high-frequency components while preserving DC and low-frequency content. Use Value: Restores signal integrity without requiring complex digital equalization; supports >150 MHz data rates with <0.1 dB ripple. | Use Scenario: Compensating RC-induced roll-off in video distribution networks or backplane interconnects. IC Role / Device Role / Timing Role: Acts as programmable peaking filter with adjustable zero/pole placement via RG and RF. Use Value: Enables real-time adjustment of equalization profile during system calibration; eliminates fixed-component tuning. |
| Pulse Amplitude Compensation | Voltage-Tunable Active Filters |
Use Scenario: Stabilizing pulse height in time-of-flight sensors or laser diode drivers where temperature drift affects amplitude. IC Role / Device Role / Timing Role: Closed-loop gain controller modulates output amplitude in response to feedback from peak detector. Use Value: Maintains constant pulse amplitude over ±40°C with <±0.3 dB error, improving measurement repeatability. | Use Scenario: Implementing tunable bandpass/band-reject filters in spectrum analyzers or EMI test receivers. IC Role / Device Role / Timing Role: Core gain element in transconductance-capacitor (OTA-C) or state-variable filter topologies. Use Value: Enables electronic cutoff frequency adjustment via analog voltage; avoids mechanical potentiometers or switched capacitor banks. |
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 small-signal bandwidth, 7.0 nV/√Hz input noise, SOIC-8 package | Better suited for higher-frequency IF/RF gain control; lower noise but reduced output drive (±100 mA) | Select when bandwidth >300 MHz is required and load drive ≤100 mA suffices |
| VCA824IDGSR | 420 MHz bandwidth, 7.0 nV/√Hz noise, same 10-pin VSSOP footprint | Higher bandwidth alternative with identical pinout and layout compatibility | Choose for UHF applications needing >300 MHz small-signal response without PCB redesign |
Compared with VCA822IDGSR, VCA821IDR offers higher bandwidth but lower output current, while VCA824IDGSR matches the VSSOP package and exceeds bandwidth by 2.8× - making it ideal for next-generation wideband receivers where layout reuse is critical.
Availability
VCA822IDGSR is available at Aetrix Electronics and suitable for differential equalizers, pulse amplitude compensation systems, and voltage-tunable active filters requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for VCA822IDGSR 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 solutions.
The VCA822IDGSR belongs to TI's wideband variable gain amplifier product line, designed specifically for precision analog gain control in test & measurement, medical imaging, and high-speed communications infrastructure.
FAQ
What is the maximum gain adjust range of the VCA822IDGSR?
The VCA822IDGSR provides >40 dB of gain adjust range, achieved by varying the gain control voltage (VG) from –1 V to +1 V relative to the externally set maximum gain (AVMAX). At AVMAX = +10 V/V, this corresponds to a linear-in-V/V range from 0.1 V/V (–20 dB) to 10 V/V (+20 dB), verified across –40°C to +85°C operating conditions per SBOS343D Rev D.
Does the VCA822IDGSR require external output buffering?
No, the VCA822IDGSR does not require external output buffering. Its integrated current-feedback output stage delivers ±160 mA into 5 Ω loads and sustains ±3.7 V swing into 100 Ω, enabling direct drive of coaxial cables, ADC inputs, or downstream op-amps without added components - a key feature confirmed in the device description and electrical characteristics tables of the VCA822IDGSR datasheet.
What is the small-signal bandwidth of the VCA822IDGSR at +10 V/V gain?
The VCA822IDGSR achieves 150 MHz small-signal bandwidth at +10 V/V gain with ±5-V supplies, RL = 100 Ω, and VG = +1 V, as specified in Section 7.5 "Electrical Characteristics" of the official SBOS343D datasheet. This bandwidth applies to the 10-pin VSSOP (DGS) package and is validated at 25°C with 1 VPP output signal.
Can the VCA822IDGSR operate from a single supply?
No, the VCA822IDGSR requires dual ±5-V supplies for specified operation, with absolute maximum ratings limiting supply voltage to ±6.5 V. The device features separate +VCC and –VCC pins and is not characterized for single-supply use; attempting single-rail operation violates recommended conditions and risks distortion, clipping, or latch-up per Section 7.3 of the VCA822IDGSR datasheet.
What is the input voltage noise density of the VCA822IDGSR?
The VCA822IDGSR has a typical input voltage noise density of 8.2 nV/√Hz at f > 100 kHz and VG = +1 V, as measured under VS = ±5 V, AVMAX = +10 V/V, RF = 1 kΩ, RG = 200 Ω, and RL = 100 Ω conditions. This value is specified in the "Electrical Characteristics" table (Section 7.5) and remains stable across the full operating temperature range.
VCA822IDGSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 10-VSSOP
VCA822IDGSR FAQ
1.How can I place an order for VCA822IDGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for VCA822IDGSR 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 VCA822IDGSR reliable?
The price and inventory of VCA822IDGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VCA822IDGSR is usually 5 days.
3.What payment methods are accepted for VCA822IDGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VCA822IDGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VCA822IDGSR?
VCA822IDGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VCA822IDGSR 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 VCA822IDGSR?
For technical support, including VCA822IDGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VCA822IDGSR requirements.
6.How does Aetrix verify that VCA822IDGSR is sourced from the original manufacturer or authorized distributors?
All VCA822IDGSR 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 VCA822IDGSR meets industry standards.
7.What is the process for return or replacement of VCA822IDGSR?
All VCA822IDGSR units undergo pre-shipment inspection (PSI). If there is an issue with VCA822IDGSR, 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 VCA822IDGSR part is unused and in its original packaging.
Return procedure for VCA822IDGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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