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Analog Devices Inc. LT1397CGN#PBF
- Part No.:
- LT1397CGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LT1397CGN#PBF.pdf
- Description:
- IC OPAMP CFA 4 CIRCUIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
LT1397CGN#PBF from Analog Devices (formerly Linear Technology) is a quad 400MHz current feedback amplifier optimized for ±5V operation, delivering 800V/μs slew rate, 80mA output current, and 0.1dB gain flatness to 100MHz - deployed in high-speed video loop-through, RGB-to-YUV matrix buffering, and IF signal conditioning circuits.
For engineers reviewing the LT1397CGN#PBF datasheet, LT1397CGN#PBF pinout, LT1397CGN#PBF application, or LT1397CGN#PBF equivalent, key selection criteria include its 16-pin SSOP package with NC pins at positions 8 and 9, quad-channel current-feedback architecture, ±2V to ±6V supply flexibility, and verified performance in cable-driven video distribution systems requiring low differential gain/phase error (0.02%/0.04°).
Technical Context
The LT1397CGN#PBF implements a current feedback topology with separate high-impedance noninverting input and low-impedance inverting input, enabling bandwidth independence from closed-loop gain-achieving 400MHz at AV = 1 and 350MHz at AV = 2 or –1. Its internal transimpedance stage drives a high-slew-rate output buffer capable of sourcing/sinking ±80mA.
Designed on Linear's proprietary complementary bipolar process, it features matched input bias currents (±50μA typ), 4.6mA per amplifier supply current at ±5V, and operates across 0°C to 70°C ambient with guaranteed specifications over that range. The SSOP-16 package includes exposed V– connection at Pin 13 and two no-connect terminals (Pins 8 & 9) to support layout isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (–3dB) | 400MHz at AV = 1; enables full HD video amplification without gain-dependent bandwidth roll-off |
| Slew Rate | 800V/μs at AV = 2, RF = 255Ω; supports fast transient response for 1080p/60 video signals |
| Output Current | ±80mA; drives 75Ω coaxial cables directly without external buffers in RGB/YUV routing |
| Supply Range | ±2V to ±6V (4V–12V total); accommodates legacy ±5V and modern low-voltage industrial rails |
| Differential Gain / Phase | 0.02% / 0.04° at 4.43MHz; meets broadcast-grade NTSC/PAL video fidelity requirements |
| Input Noise | 4.5nV/√Hz (voltage), 25pA/√Hz (inverting current); preserves SNR in multi-stage analog signal chains |
| Small-Signal Rise Time | 1.3ns; ensures sub-10ns edge fidelity for high-speed MUX and IF amplifier applications |
Pinout & Package
LT1397CGN#PBF is housed in a 16-lead plastic SSOP package (3.9mm × 8.7mm × 1.75mm) with exposed thermal pad connected to V– (Pin 13). Pins 8 and 9 are no-connect (NC) and must remain unconnected per design specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | A-channel output; drives 75Ω loads directly with 3.4V swing into 150Ω at ±5V |
| 2 | –IN A | Inverting input of Channel A; requires resistive feedback (e.g., 255Ω) for stability |
| 3 | +IN A | Noninverting input of Channel A; high-impedance node (0.3MΩ) for signal source coupling |
| 4 | V+ | Positive supply rail; accepts +2V to +6V; mismatch >3V shifts offset by ~2.5mV/V |
| 5 | +IN B | Noninverting input of Channel B; electrically isolated from other channels |
| 6 | –IN B | Inverting input of Channel B; shares same noise/current specs as Pin 2 |
| 7 | OUT B | B-channel output; identical AC/DC specs to Pin 1 |
| 8 | NC | No connection; must be left floating - not tied to ground or supply |
| 9 | NC | No connection; PCB layout must omit trace or pad |
| 10 | OUT C | C-channel output; fully independent; supports simultaneous RGB/YUV processing |
| 11 | –IN C | Inverting input of Channel C; validated for <100pF stray capacitance |
| 12 | +IN C | Noninverting input of Channel C; matches Pin 3 impedance and voltage range |
| 13 | V– | Negative supply rail; exposed pad soldered to PCB ground plane for thermal management |
| 14 | +IN D | Noninverting input of Channel D; supports fourth video path in quad-matrix systems |
| 15 | –IN D | Inverting input of Channel D; maintains 25pA/√Hz current noise spec |
| 16 | OUT D | D-channel output; completes four-channel parallel video signal conditioning |
Key Features
| Feature | Design Value |
|---|---|
| Current feedback architecture | Enables constant bandwidth across gains (400MHz @ AV=1, 350MHz @ AV=2), unlike voltage-feedback op amps |
| Quad-channel integration in SSOP-16 | Reduces board space vs discrete dual-amplifier solutions; eliminates inter-channel skew in RGB timing |
| 75Ω back-termination compatibility | Supports direct drive of coaxial video lines without external series resistors in loop-through topologies |
| Low distortion at 10MHz | HD2/HD3 < –70dBc enables clean composite video reconstruction without post-filtering |
| Thermal-enhanced SSOP package | θJA = 135°C/W with V– pad soldered; sustains 4.6mA × 4 channels × 10V drop without derating at 70°C |
| Input protection | Withstands ±5V differential input swing - safe for hot-plug video sources and ESD-prone interfaces |
Applications
| Video Loop-Through Distribution | RGB-to-YUV Color Matrix Buffering |
|---|---|
Use Scenario: Distributing HDMI or component video signals to multiple monitors while preserving signal integrity. IC Role / Device Role / Timing Role: Quad-channel unity-gain buffer isolating source from multiple 75Ω loads with minimal group delay variation. Use Value: 0.1dB gain flatness to 100MHz and 0.02% differential gain ensure color fidelity across full NTSC/PAL bandwidth. |
Use Scenario: Converting RGB camera outputs to YUV format for compression in broadcast encoders. IC Role / Device Role / Timing Role: Four synchronized amplifiers implementing weighted summing (R,G,B → Y,R-Y,B-Y) with matched propagation delay (2.5ns). Use Value: Channel-to-channel gain matching <0.1dB and phase tracking <0.1° prevent chroma misregistration in real-time video pipelines. |
| IF Signal Conditioning | High-Speed Multiplexer Amplification |
Use Scenario: Amplifying 30–70MHz intermediate frequency signals in software-defined radio front ends. IC Role / Device Role / Timing Role: High-Z noninverting input accepts filtered IF signals; low-output-impedance drives ADC drivers or mixers. Use Value: 350MHz bandwidth at AV = 2 and 800V/μs slew rate preserve modulation envelope integrity for QAM-256 signals. |
Use Scenario: Driving analog multiplexer outputs in automated test equipment requiring fast settling and low crosstalk. IC Role / Device Role / Timing Role: Post-MUX gain stage with 25ns 0.1% settling time and 10% overshoot control. Use Value: 1.3ns rise time and 100MHz 0.1dB bandwidth enable accurate sampling of 50Msps switched waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad current feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6738MA/NOPB | Single-channel, SO-8; 450MHz BW, 1900V/μs slew; higher power (9.5mA/ch) | Requires four devices for quad function; lacks integrated NC isolation for SSOP layout | Select when single-channel modularity or higher slew rate outweighs board-area constraints |
| ADA4817-4ARUZ | Quad voltage-feedback op amp; 1GHz GBW, 225V/μs; lower noise (4nV/√Hz) but gain-dependent bandwidth | Not suitable for fixed-bandwidth video loop-through; requires gain compensation per channel | Prefer for precision DC-coupled sensor signal chains where bandwidth stability is secondary to offset/CMRR |
Compared with LMH6738MA/NOPB and ADA4817-4ARUZ, the LT1397CGN#PBF uniquely delivers quad-channel current feedback in a single SSOP-16 package with guaranteed 400MHz bandwidth at unity gain, making it optimal for space-constrained, multi-path video routing where gain-flatness and channel matching are critical.
Availability
LT1397CGN#PBF is available at Aetrix Electronics and suitable for video distribution systems, broadcast encoder front ends, and high-speed test instrumentation requiring stable component supply, long-term obsolescence management, and RoHS-compliant lead-free packaging.
Supply support for LT1397CGN#PBF 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
Analog Devices, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors for precision, power, and connectivity applications.
The LT1397 belongs to Linear Technology's high-speed current feedback amplifier product line, engineered specifically for demanding video, communications, and instrumentation systems requiring wide bandwidth, fast settling, and robust drive capability.
FAQ
What is the operating temperature range specified for the LT1397CGN#PBF?
The LT1397CGN#PBF is specified for operation from 0°C to 70°C ambient temperature, with functional guarantee over –40°C to 85°C. All electrical characteristics in the datasheet are guaranteed within the 0°C to 70°C range, and the part uses the "C" grade designation indicating commercial temperature qualification. Thermal derating is not required below 70°C under typical load conditions.
Does the LT1397CGN#PBF include an enable/disable function like the LT1395CS6?
No, the LT1397CGN#PBF does not include an enable pin or shutdown functionality. Unlike the LT1395CS6 (which has EN pin), the LT1397CGN#PBF is a standard quad amplifier with no power-control feature. All four channels operate continuously when powered. For power-gated designs, external FET switching on V+ or V– rails is required.
Can the LT1397CGN#PBF drive a 50Ω load effectively?
Yes, the LT1397CGN#PBF can drive a 50Ω load with full performance: output voltage swing remains ≥±3.2V at ±5V supplies into 150Ω, and small-signal bandwidth is characterized down to 100Ω loads. For 50Ω, use 280Ω feedback resistors (per datasheet Table on p.6) to maintain 350MHz bandwidth and ≤10% overshoot; output current capability (±80mA) exceeds 50Ω drive requirements.
How are the NC pins (8 and 9) on the LT1397CGN#PBF handled in PCB layout?
Pins 8 and 9 of the LT1397CGN#PBF are designated as no-connect (NC) and must remain unconnected - neither tied to ground nor routed to any net. The datasheet explicitly states these pins serve no internal function and floating is mandatory. PCB footprints should omit copper pads or traces for these pins to prevent parasitic coupling or unintended thermal paths.
What is the maximum capacitive load the LT1397CGN#PBF can drive without instability?
The LT1397CGN#PBF can drive up to 1000pF with 255Ω feedback resistors (AV = 2) while maintaining ≤5dB peaking, per Figure 13 in the datasheet. For larger loads, adding a 5Ω–35Ω series resistor at the output isolates the capacitance and preserves stability. Performance validation shows stable operation with 2100pF using 3300Ω feedback, but bandwidth reduces proportionally - always verify phase margin with actual layout parasitics.
LT1397CGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 800V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 400 MHz
- Current - Input Bias:
- 10 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 4.6mA (x4 Channels)
- Current - Output / Channel:
- 80 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LT1397CGN#PBF FAQ
1.How can I place an order for LT1397CGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1397CGN#PBF 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 LT1397CGN#PBF reliable?
The price and inventory of LT1397CGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1397CGN#PBF is usually 5 days.
3.What payment methods are accepted for LT1397CGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1397CGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1397CGN#PBF?
LT1397CGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1397CGN#PBF 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 LT1397CGN#PBF?
For technical support, including LT1397CGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1397CGN#PBF requirements.
6.How does Aetrix verify that LT1397CGN#PBF is sourced from the original manufacturer or authorized distributors?
All LT1397CGN#PBF 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 LT1397CGN#PBF meets industry standards.
7.What is the process for return or replacement of LT1397CGN#PBF?
All LT1397CGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1397CGN#PBF, 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 LT1397CGN#PBF part is unused and in its original packaging.
Return procedure for LT1397CGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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