My Inquiry
My Account
Texas Instruments OPA684IDBVTG4
- Part No.:
- OPA684IDBVTG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
OPA684IDBVTG4.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,661
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA684IDBVTG4 from Texas Instruments is a low-power, current-feedback operational amplifier with disable control, designed for high-bandwidth video and signal conditioning applications. It delivers 120MHz bandwidth at G = +10, –78dBc 2nd-harmonic distortion at 5MHz (RL ≥ 1kΩ), ±4V output swing on ±5V supplies, and 1.7mA quiescent current - enabling broadcast video drivers, ADC input stages, and multichannel summing amplifiers.
For engineers reviewing the OPA684IDBVTG4 datasheet, OPA684IDBVTG4 pinout, OPA684IDBVTG4 application, or OPA684IDBVTG4 equivalent, key selection criteria include its CFBplus architecture's gain-independent bandwidth, 100µA shutdown current, SOT-23-6 package footprint, and verified performance in NTSC composite video (0.04% differential gain, 0.02° differential phase) under ±5V operation.
Technical Context
The OPA684IDBVTG4 employs a patented CFBplus architecture featuring an internally closed-loop input buffer stage that linearizes inverting-input impedance, minimizing bandwidth degradation and harmonic distortion across gain settings. This enables stable 0.1dB gain flatness up to 19MHz at G = +2 and supports peaking-free frequency response tuning via external feedback elements.
Its dual-supply (±2.5V to ±6V) and single-supply (+2.8V to +12V) operation is enabled by supply-independent biasing, while the DIS pin provides true high-impedance I/O state during shutdown. The inverting input presents only 2.5Ω open-loop resistance, and the non-inverting input exhibits 50kΩ || 2pF impedance - critical for maintaining stability in high-speed summing and filter configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth (G = +10) | 120MHz - supports >100MHz video baseband and IF signal paths without gain-dependent roll-off |
| 2nd-Harmonic Distortion (5MHz, RL ≥ 1kΩ) | –78dBc - meets broadcast-grade NTSC/PAL video linearity requirements |
| Output Current (Sourcing) | 160mA min - drives 100Ω loads with ±4V swing and supports up to four 150Ω video loads |
| Quiescent Current | 1.7mA max (±5V) - enables battery-powered or thermally constrained portable video systems |
| Shutdown Current | 100µA max - reduces system standby power by >94% while preserving PCB layout |
| Differential Gain/Phase (NTSC) | 0.04% / 0.02° - qualifies for professional camera and studio broadcast signal chain use |
| Rise/Fall Time (G = +2, 4V step) | 6.8ns - ensures sub-10ns transient response for fast-pulse and digital waveform conditioning |
Pinout & Package
SOT-23-6 package (DBV), 6-pin surface-mount, 1.6mm × 2.9mm footprint, 0.95mm height, thermal resistance θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier Output | Low-impedance, high-current node capable of sourcing/sinking ≥120mA into 100Ω load |
| 2 (–IN) | Inverting Input | 2.5Ω open-loop resistance; senses feedback error current; requires precise RF placement for stability |
| 3 (+IN) | Noninverting Input | 50kΩ || 2pF impedance; sets common-mode reference; DC-biased at VS/2 in single-supply configs |
| 4 (–VS) | Negative Supply Rail | Supports bipolar operation down to –6V; connects to ground in single-supply mode |
| 5 (DIS) | Disable Control (Active-Low) | Pulled LOW disables amplifier, reducing supply current to ≤100µA and placing I/O in high-Z state |
| 6 (+VS) | Positive Supply Rail | Accepts +2.8V to +12V (single) or ±2.5V to ±6V (dual); internal biasing maintains performance across range |
Key Features
| Feature | Design Value |
|---|---|
| CFBplus Architecture | Internally buffered inverting input enables near-constant bandwidth (120MHz @ G=+10, 160MHz @ G=+2) and <–78dBc distortion across gain range |
| Wide Supply Range | Operates from ±2.5V to ±6V or +2.8V to +12V - eliminates need for dedicated voltage rails in mixed-signal systems |
| Video-Optimized Linearity | 0.04% differential gain / 0.02° differential phase at NTSC frequencies - certified for broadcast video driver duty |
| Fast Enable/Disable | 40ns enable time and 4ms disable time - supports dynamic power gating in multi-channel video processors |
| Low Input Noise | 3.7nV/√Hz voltage noise + 9.4pA/√Hz noninverting current noise - preserves SNR in ADC front-end and sensor interface stages |
Applications
| Broadcast Video Line Driver | ADC Input Driver |
|---|---|
|
Use Scenario: Driving multiple 150Ω composite video loads over coaxial cable in professional camera heads. IC Role / Device Role / Timing Role: Final-stage video buffer with gain = +2, DC-coupled, driving doubly terminated 50Ω or 75Ω lines. Use Value: Delivers 0.04% dG / 0.02° dP across 4 parallel loads while consuming only 1.7mA - replaces higher-power op-amps in space-constrained modules. |
Use Scenario: Conditioning analog signals before 12-bit+ SAR or pipeline ADCs in test equipment. IC Role / Device Role / Timing Role: High-speed, low-distortion gain block with 120MHz bandwidth and <–78dBc THD+N at 5MHz. Use Value: Maintains ENOB >11.5 bits at 5MHz input due to ultra-low harmonic distortion and 6.8ns pulse response - minimizes aperture jitter impact. |
| SAW Filter Post-Amplifier | Multichannel Summing Amplifier |
|
Use Scenario: Boosting low-level outputs from 100–200MHz SAW filters in RF receiver IF chains. IC Role / Device Role / Timing Role: High-gain (G = +10 to +20), wideband post-filter amplifier with minimal group delay variation. Use Value: 104MHz bandwidth at G = +20 and 1.7mA supply current enable compact, low-power IF gain stages without external compensation. |
Use Scenario: Summing 4–8 video or sensor channels into a single high-fidelity output bus. IC Role / Device Role / Timing Role: Inverting-summing node with matched 50Ω inputs and 100Ω output termination. Use Value: Linearized inverting input impedance allows >100MHz summing bandwidth without gain-dependent peaking - avoids post-sum filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA683IDBVT | Lower quiescent current (1.3mA), reduced bandwidth (80MHz @ G=+10), no disable pin | Better suited for always-on, ultra-low-power portable video where shutdown is unnecessary | Select when system-level power budget is tighter than 1.5mA and full OPA684 bandwidth is not required |
| OPA691IDBVR | Higher slew rate (1800 V/µs), greater output current (200mA), 500MHz bandwidth, 2.5mA supply current | Targeted at high-speed instrumentation requiring >300MHz small-signal BW and >100mA drive into 50Ω | Choose when OPA684IDBVTG4 bandwidth or output current is insufficient for demanding IF or pulse applications |
Compared with OPA684IDBVTG4, OPA683IDBVT trades bandwidth and disable functionality for lower static power, while OPA691IDBVR delivers significantly higher speed and drive at increased supply current - making OPA684IDBVTG4 the optimal balance of low power, video-grade linearity, and integrated disable control in SOT-23-6.
Availability
OPA684IDBVTG4 is available at Aetrix Electronics and suitable for broadcast video line drivers, ADC input conditioning, SAW filter post-amplification, and multichannel summing amplifiers requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for OPA684IDBVTG4 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 OPA684IDBVTG4 belongs to TI's CFBplus current-feedback op-amp family, engineered specifically for low-power, high-linearity video, communications, and data acquisition systems where bandwidth stability across gain and ultra-low distortion are critical.
FAQ
What supply voltages does the OPA684IDBVTG4 support?
The OPA684IDBVTG4 operates from ±2.5V to ±6V dual supplies or +2.8V to +12V single supply. Its internal biasing maintains consistent AC performance across this full range. At ±5V, it achieves 120MHz bandwidth at G = +10 and 1.7mA quiescent current; at +5V single supply, bandwidth reduces to 87MHz at G = +10 but retains video-grade linearity and 1.44mA supply current - verified in TI's SBOS219D datasheet Section 4.
How does the OPA684IDBVTG4 achieve gain-independent bandwidth?
The OPA684IDBVTG4 uses a patented CFBplus architecture with an internally closed-loop input buffer that linearizes the inverting-input impedance to ~2.5Ω. This isolates bandwidth from gain-setting resistor (RG) variations, enabling 160MHz bandwidth at G = +2 and 120MHz at G = +10 - a <25% reduction versus conventional CFB amps. This behavior is confirmed in Figure 1 and Table 1 of the SBOS219D datasheet.
What is the function of the DIS pin on the OPA684IDBVTG4?
The DIS pin on the OPA684IDBVTG4 is an active-low disable control. When pulled LOW, it reduces supply current to ≤100µA and places both input and output pins in high-impedance state - enabling dynamic power gating. Leaving DIS open or HIGH maintains normal operation. Enable time is 40ns and disable time is 4ms, as measured in Figure 7 of the SBOS219D datasheet.
Can the OPA684IDBVTG4 drive multiple 150Ω video loads?
Yes - the OPA684IDBVTG4 delivers 160mA sourcing current and ±4V output swing on ±5V supplies, enabling it to drive up to four parallel 150Ω video loads (equivalent to 37.5Ω) while maintaining 0.09% differential gain and 0.09° differential phase per TI's Figure 15. This capability is validated in the "Low-Power Video Line Driver Applications" section of SBOS219D.
What is the typical harmonic distortion performance of the OPA684IDBVTG4 at 5MHz?
At 5MHz, G = +2, VO = 2VPP, and RL ≥ 1kΩ, the OPA684IDBVTG4 achieves –78dBc 2nd-harmonic distortion and –89dBc 3rd-harmonic distortion - meeting broadcast video standards. With RL = 100Ω, distortion degrades to –67dBc (2nd) and –70dBc (3rd), as specified in Table 1 (AC Performance) of SBOS219D. This performance is enabled by the CFBplus input stage's improved linearity.
OPA684IDBVTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 820V/µs
- Gain Bandwidth Product:
- 1.9 GHz
- -3db Bandwidth:
- 210 MHz
- Current - Input Bias:
- 5 µA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 1.7mA
- Current - Output / Channel:
- 160 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
OPA684IDBVTG4 FAQ
1.How can I place an order for OPA684IDBVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA684IDBVTG4 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 OPA684IDBVTG4 reliable?
The price and inventory of OPA684IDBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA684IDBVTG4 is usually 5 days.
3.What payment methods are accepted for OPA684IDBVTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA684IDBVTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA684IDBVTG4?
OPA684IDBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA684IDBVTG4 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 OPA684IDBVTG4?
For technical support, including OPA684IDBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA684IDBVTG4 requirements.
6.How does Aetrix verify that OPA684IDBVTG4 is sourced from the original manufacturer or authorized distributors?
All OPA684IDBVTG4 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 OPA684IDBVTG4 meets industry standards.
7.What is the process for return or replacement of OPA684IDBVTG4?
All OPA684IDBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA684IDBVTG4, 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 OPA684IDBVTG4 part is unused and in its original packaging.
Return procedure for OPA684IDBVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA684IDBVTG4 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
