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Analog Devices Inc. LT1397HDE#PBF
- Part No.:
- LT1397HDE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LT1397HDE#PBF.pdf
- Description:
- IC OPAMP CFA 4 CIRCUIT 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,362
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Product details
Overview
LT1397HDE#PBF from Analog Devices (acquired Linear Technology) is a quad-channel 400MHz current feedback amplifier optimized for high-speed video, RGB buffering, and color-difference matrix applications. It delivers 800V/μs slew rate, ±80mA output current, and 0.1dB gain flatness to 100MHz at ±5V supply - enabling precision analog signal routing in broadcast-grade video systems.
For engineers reviewing the LT1397HDE#PBF datasheet, LT1397HDE#PBF pinout, LT1397HDE#PBF application, or LT1397HDE#PBF equivalent, this page provides verified package mapping (14-lead DFN), thermal performance data (θJA = 43°C/W), operating temperature range (–40°C to 125°C), and real-world design context for video loop-through, IF amplification, and high-speed MUX buffering.
Technical Context
The LT1397HDE#PBF implements a current feedback architecture with separate high-impedance noninverting input and low-impedance inverting input, enabling stable operation with fixed 255Ω feedback resistors across gains of 1, 2, and –1. Its bandwidth is resistor-dependent: 400MHz at AV = 1 (RF = 374Ω), 350MHz at AV = 2 or –1 (RF = RG = 255Ω).
It features rail-to-rail output swing capability (±3.4V into 150Ω at ±5V), low input bias currents (±50μA typ), and differential input voltage limit of ±5V. The device operates from ±2V to ±6V supplies and draws 4.6mA per amplifier - with no enable/shutdown pin, distinguishing it from the LT1395CS6 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (–3dB) | 400MHz at AV = 1, ±5V - supports full HD video baseband (up to 150MHz) with margin for filter roll-off and PCB losses. |
| Slew Rate | 800V/μs - ensures <1.3ns rise time and <10% overshoot for 1VP-P signals, critical for sharp video edge fidelity. |
| Output Current | ±80mA - drives 75Ω coaxial cables directly without external buffers in RGB/YUV distribution systems. |
| Supply Range | ±2V to ±6V (4V–12V total) - compatible with legacy ±5V video infrastructure and modern low-voltage designs. |
| Input Voltage Range | ±3.5V (vs. V+ and V–) - accommodates standard video signal levels (1VP-P, 0.7VP-P) with headroom for DC offset. |
| Gain Flatness | 0.1dB to 100MHz - preserves chroma/luma phase alignment in SD/HD composite and component video paths. |
| Operating Temp | –40°C to 125°C - qualified for under-hood automotive infotainment, industrial vision, and extended-temperature broadcast encoders. |
Pinout & Package
LT1397HDE#PBF is housed in a 14-lead (4mm × 3mm × 0.75mm) plastic DFN package with exposed thermal pad connected to V–. Pin 15 (underside metal) must be soldered to PCB ground plane for thermal compliance (θJA = 43°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT A | A channel output | High-current, low-impedance output capable of driving 75Ω loads directly; requires series termination for impedance matching. |
| 2 –IN A | Inverting input of A channel | Low-impedance node (≈20Ω) - must use precise 255Ω feedback resistor; sensitive to stray capacitance. |
| 3 +IN A | Noninverting input of A channel | High-impedance (0.3–1MΩ), low-bias-current input; used for signal injection in video loop-through topologies. |
| 4 V+ | Positive supply voltage | Accepts +2V to +6V; mismatch >3V vs. V– shifts offset by ~2.5mV/V and bias current by ~10μA/V. |
| 5 +IN B | Noninverting input of B channel | Independent high-Z input for second video path; identical specs to +IN A. |
| 6 –IN B | Inverting input of B channel | Matched to –IN A; enables dual-channel parallel processing without crosstalk. |
| 7 OUT B | B channel output | Electrically isolated from OUT A; supports independent gain/feedback configuration. |
| 8 OUT C | C channel output | Third independent output; used in RGB-to-YUV conversion for R, G, B signal paths. |
| 9 –IN C | Inverting input of C channel | Current-summing node for weighted inputs (e.g., Y = 0.3R + 0.59G + 0.11B). |
| 10 +IN C | Noninverting input of C channel | High-Z reference point for third channel; maintains DC stability in multi-stage matrices. |
| 11 V– | Negative supply voltage | Reference for all channels; exposed pad connects here - mandatory for thermal reliability at full load. |
| 12 +IN D | Noninverting input of D channel | Enables quad-channel simultaneous processing - e.g., R-Y, B-Y, Y, and sync in component video. |
| 13 –IN D | Inverting input of D channel | Supports fourth independent feedback path; used in buffered color-difference reconstruction. |
| 14 OUT D | D channel output | Final channel output; completes quad functionality for full-color-space signal chains. |
Key Features
| Feature | Design Value |
|---|---|
| 400MHz unity-gain bandwidth | Enables distortion-free amplification of NTSC/PAL/HD-SDI baseband signals without peaking or group delay variation. |
| 0.02% differential gain / 0.04° differential phase | Meets SMPTE RP 168 and ITU-R BT.601 broadcast video fidelity requirements for luma/chroma separation. |
| 800V/μs slew rate with 255Ω feedback | Guarantees sub-2ns transient response for 1080p60 pixel clock edges and sync pulse integrity. |
| ±80mA output drive into 150Ω | Eliminates need for external emitter followers in RGB distribution amplifiers, reducing BOM count and board area. |
| –40°C to 125°C guaranteed operation | Validated for automotive display modules and industrial machine vision cameras without derating. |
| Low 4.6mA per amplifier supply current | Supports quad-channel video processing in thermally constrained enclosures (e.g., set-top box SoC add-on cards). |
Applications
| RGB Video Distribution Amplifier | Component Video Loop-Through |
|---|---|
Use Scenario: Distributing RGBHV signals from GPU or FPGA to multiple monitors or capture devices while maintaining impedance matching and signal integrity. IC Role / Device Role / Timing Role: Quad-channel current feedback amplifier configured as four independent unity-gain buffers with 75Ω back-termination. Use Value: Preserves 1080p60 timing margins (<2.5ns propagation delay) and eliminates ghosting via 0.02% differential gain error. |
Use Scenario: Passing HDMI or DisplayPort video through a docking station with passthrough and local display simultaneously. IC Role / Device Role / Timing Role: Dual-channel buffer (A+B) for primary video path; C+D channels for auxiliary sync or audio embedding. Use Value: 400MHz bandwidth ensures full support for 3.2Gbps TMDS clock recovery without jitter accumulation. |
| Color-Difference Matrix Converter | IF Signal Amplifier in SDR Receivers |
Use Scenario: Converting RGB outputs from image sensors to YUV format for compression in broadcast encoders or medical imaging systems. IC Role / Device Role / Timing Role: Quad amplifier implementing weighted sum (R,G,B → Y) and difference (R–Y, B–Y) with precision resistor networks. Use Value: 0.1dB gain flatness to 100MHz prevents chroma smearing across wideband video spectra. |
Use Scenario: Amplifying 70MHz IF signals in software-defined radio front-ends before ADC sampling. IC Role / Device Role / Timing Role: Single-channel high-linearity amplifier (A channel) with 350MHz bandwidth at AV = 2 for IF gain staging. Use Value: 800V/μs slew rate prevents intermodulation distortion on multi-tone IF waveforms (e.g., LTE 20MHz carriers). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed current feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6703MA/NOPB | Single-channel, 1.8GHz GBW, 3100V/μs slew, SO-8 package; no quad option; higher power (12.5mA/channel). | Requires four units for quad function; better for ultra-wideband IF but lacks integrated video-optimized flatness. | Select when >1GHz bandwidth is required and board space allows discrete channel replication. |
| ADA4817-4ARUZ | Quad-channel, 1GHz GBW, 225V/μs slew, 14-lead TSSOP; lower slew rate; 10.5mA/channel; no guaranteed 125°C operation. | Higher noise (4nV/√Hz vs. 4.5nV/√Hz), wider bandwidth but insufficient slew for 1080p60 edge fidelity. | Select for general-purpose high-speed buffering where video-grade differential phase is not required. |
Compared with LMH6703MA/NOPB and ADA4817-4ARUZ, the LT1397HDE#PBF uniquely combines quad integration, 400MHz bandwidth with 0.1dB flatness to 100MHz, and automotive-grade temperature range - making it optimal for space-constrained, broadcast-compliant video signal chains where channel matching and thermal robustness are critical.
Availability
LT1397HDE#PBF is available at Aetrix Electronics and suitable for RGB video distribution amplifiers, broadcast encoder signal conditioning, and automotive infotainment display interfaces requiring stable component supply across extended temperature ranges.
Supply support for LT1397HDE#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LT1397 belongs to ADI's legacy Linear Technology high-speed amplifier product line, specifically engineered for broadcast video, instrumentation, and high-fidelity analog signal routing where bandwidth, slew rate, and video-specific distortion metrics are mission-critical.
FAQ
What is the maximum capacitive load the LT1397HDE#PBF can drive stably?
The LT1397HDE#PBF can drive up to 100pF directly with 255Ω feedback resistors at AV = 2. For larger loads (e.g., 500pF), a 5Ω–35Ω series resistor at the output isolates the capacitance and maintains stability without compromising small-signal bandwidth - a technique validated in Figure 14 of the LT1395/LT1396/LT1397 datasheet. This behavior applies identically to all four channels of the LT1397HDE#PBF.
Does the LT1397HDE#PBF include an enable/disable pin like the LT1395CS6?
No, the LT1397HDE#PBF does not feature an enable pin. Unlike the LT1395CS6 (which has EN on pin 5), the LT1397HDE#PBF is a fixed-function quad amplifier with no shutdown capability. All four channels operate continuously when powered. If power gating is required, external MOSFET switches on the V+ and V– rails must be implemented - a design choice confirmed by the absence of EN pin in the DE14 package pinout for LT1397HDE#PBF.
How does the LT1397HDE#PBF perform in differential-phase-critical video applications?
The LT1397HDE#PBF delivers 0.04° differential phase error at 4.43MHz (NTSC) and 3.58MHz (PAL), measured with 255Ω feedback and 150Ω load per the datasheet's Note 8. This meets SMPTE RP 168 broadcast standards and exceeds consumer video requirements. Its current feedback architecture inherently minimizes phase shift versus frequency - a key advantage over voltage-feedback op-amps in RGB/YUV matrix circuits where chroma timing alignment is essential.
Can the LT1397HDE#PBF be used with single-supply operation?
Yes, the LT1397HDE#PBF supports single-supply operation from 4V to 12V (e.g., 5V or 12V). When using 5V (0V/5V), the input common-mode range extends from 1.0V to 4.0V, and output swing reaches 0.6V to 4.2V (RL = ∞) or 0.6V to 3.6V (RL = 150Ω). Designers must bias inputs within this window and avoid exceeding the ±5V differential input limit - verified in the Electrical Characteristics table under VINH/VINL and VOUTH/VOUTL conditions.
What thermal design considerations apply to the LT1397HDE#PBF in its DFN package?
The LT1397HDE#PBF in the DE14 DFN package has θJA = 43°C/W - significantly lower than SO-14 variants (θJA = 100°C/W) due to its exposed V– pad. To achieve this rating, the underside thermal pad (pin 15) must be soldered to a minimum 100mm² copper pour on the PCB's inner layer, connected via ≥4 thermal vias to internal ground planes. Failure to implement this results in junction temperatures exceeding 125°C at full 4-channel load - violating the LT1397HDE#PBF's guaranteed operating range.
LT1397HDE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 14-WFDFN Exposed Pad
- 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:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-DFN (4x3)
LT1397HDE#PBF FAQ
1.How can I place an order for LT1397HDE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1397HDE#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 LT1397HDE#PBF reliable?
The price and inventory of LT1397HDE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1397HDE#PBF is usually 5 days.
3.What payment methods are accepted for LT1397HDE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1397HDE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1397HDE#PBF?
LT1397HDE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1397HDE#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 LT1397HDE#PBF?
For technical support, including LT1397HDE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1397HDE#PBF requirements.
6.How does Aetrix verify that LT1397HDE#PBF is sourced from the original manufacturer or authorized distributors?
All LT1397HDE#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 LT1397HDE#PBF meets industry standards.
7.What is the process for return or replacement of LT1397HDE#PBF?
All LT1397HDE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1397HDE#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 LT1397HDE#PBF part is unused and in its original packaging.
Return procedure for LT1397HDE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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