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Analog Devices Inc. LT1723IS8#PBF
- Part No.:
- LT1723IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1723IS8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:162
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Product details
Overview
LT1723IS8#PBF from Analog Devices (formerly Linear Technology) is a dual, low-noise, high-speed precision operational amplifier in an 8-lead SO package, rated for –40°C to +85°C operation. It delivers 200MHz gain bandwidth, 70V/µs slew rate, and 3.8nV/√Hz input voltage noise, enabling high-fidelity video line driving and wideband active filtering with ±5V or single 5V supplies.
For engineers reviewing the LT1723IS8#PBF datasheet, LT1723IS8#PBF pinout, LT1723IS8#PBF application, or LT1723IS8#PBF equivalent, this page provides verified pin functions, real-world video/RF signal conditioning use cases, thermal and stability data for capacitive loads up to 100pF, and validated alternative op-amps for dual-channel high-speed amplification.
Technical Context
The LT1723IS8#PBF employs a voltage-feedback architecture with a folded-cascode input stage and complementary emitter-follower output stage, fabricated on Linear's low-voltage complementary bipolar process. Its input bias current cancellation technique eliminates the need for matched source impedances while maintaining <300nA max input bias current and <400µV max input offset voltage.
It achieves unity-gain stability with ≤100pF capacitive load and drives ±3V into 150Ω with ±5V supplies or 1.5V–3.5V swing into 500Ω with single 5V supply referenced to 2.5V - critical for differential CAT-5 video transmission and ADSL receiver front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 200MHz at f = 200kHz - ensures >100dB open-loop gain at 1MHz video frequencies. |
| Slew Rate | 70V/µs - supports full-swing 2V step response in <100ns with 0.1% settling. |
| Input Noise Voltage | 3.8nV/√Hz at 10kHz - optimized for source resistances 0.8k–12kΩ, minimizing total system noise. |
| Output Current | 23mA min - drives 150Ω loads to ±3V, enabling direct interface with 75Ω/62.5Ω video termination networks. |
| Supply Current | 3.7mA per amplifier - enables dual-channel high-speed operation within 7.4mA total at ±5V. |
| Input Offset Voltage | 400µV max - guarantees DC accuracy in precision buffer and active filter configurations. |
| Capacitive Load Stability | Stable up to 100pF - allows direct connection to PCB traces, cables, or ADC input capacitance without external isolation. |
Pinout & Package
LT1723IS8#PBF is housed in an 8-lead plastic SO (Small Outline) package, 0.150-inch narrow body, with JEDEC MS-012AC compliance and 190°C/W junction-to-ambient thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT A | Inverting amplifier output A | Delivers rail-to-rail capable output swing; requires no series resistor for 150Ω load drive. |
| 2: –IN A | Inverting input A | Differential input protected by back-to-back diodes; limits differential voltage to ±0.7V. |
| 3: +IN A | Non-inverting input A | High-impedance node (5MΩ differential); bias current cancellation reduces matching requirements. |
| 4: V– | Negative supply rail | Accepts –5V or ground; common return for both amplifiers and bypass capacitor. |
| 5: V+ | Positive supply rail | Accepts +5V or +5V; decoupling with 0.01–0.1µF RF capacitor required near pin. |
| 6: +IN B | Non-inverting input B | Independent high-Z input for second channel; shares same internal bias structure as Pin 3. |
| 7: –IN B | Inverting input B | Matched to Pin 2; enables fully differential or independent dual-channel configurations. |
| 8: OUT B | Inverting amplifier output B | Electrically isolated from OUT A; channel separation ≥82dB at 1MHz ensures crosstalk immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Low input noise voltage | 3.8nV/√Hz enables high-SNR signal conditioning in video and RF receiver chains without added gain-stage noise. |
| Unity-gain stable | Operates stably with CL ≤ 100pF - eliminates need for external compensation in most buffer and driver applications. |
| Input bias current cancellation | Reduces effective input bias current to <300nA - removes requirement for matched source resistors in precision DC-coupled designs. |
| Wide supply range | Specified for ±5V and single 5V operation - supports legacy ±5V systems and modern low-voltage embedded interfaces. |
| High output drive | 23mA minimum output current - directly drives 75Ω coaxial lines, CAT-5 twisted pairs, or multiple downstream inputs. |
Applications
| Differential Video Line Driver | ADSL/VDSL Receiver Front-End |
|---|---|
Use Scenario: Driving balanced video signals over CAT-5 twisted-pair cabling in broadcast monitoring equipment. IC Role / Device Role / Timing Role: Dual-channel differential line driver with matched gain and phase response across channels. Use Value: 82dB channel separation and 200MHz GBW preserve multiburst video fidelity and minimize inter-channel crosstalk. | Use Scenario: Amplifying weak analog signals from DSL line transformers before ADC sampling. IC Role / Device Role / Timing Role: Low-noise, high-linearity transimpedance and gain stage in receive path. Use Value: 3.8nV/√Hz input noise and –85dBc THD at 1MHz maximize dynamic range for high-bitrate VDSL2 reception. |
| Active Bandpass Filter | High-Speed Data Acquisition Buffer |
Use Scenario: Implementing a 10MHz center-frequency bandpass filter for EMI-immune sensor signal extraction. IC Role / Device Role / Timing Role: Dual op-amp configured as high-Q active filter with precise pole placement. Use Value: 70V/µs slew rate and 200MHz GBW maintain filter shape integrity up to third harmonic without droop or phase distortion. | Use Scenario: Isolating and buffering fast analog inputs (e.g., oscilloscope front-end) prior to multiplexed ADC conversion. IC Role / Device Role / Timing Role: Unity-gain buffer with fast settling (<112ns to 0.01%) and low output impedance (0.15Ω). Use Value: 0.15Ω output resistance minimizes settling error during multiplexer switching transients and maintains signal fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4898-2ARMZ | Lower input noise (1.1nV/√Hz), higher supply current (10.5mA), wider supply range (±5V to ±12V) | Better SNR in ultra-low-noise instrumentation; less suitable for power-constrained video systems | Select when sub-2nV/√Hz noise is mandatory and supply headroom allows ±12V operation. |
| OPA2837IDGKT | Higher GBW (340MHz), lower input offset (100µV typ), but only specified for 0°C to 70°C | Superior small-signal bandwidth for RF IF stages; not qualified for industrial temperature range | Choose for commercial-grade high-frequency test equipment where extended temperature rating is unnecessary. |
Compared with LT1723IS8#PBF, ADA4898-2ARMZ trades 2.7× higher quiescent power for 3.5× lower input noise, while OPA2837IDGKT doubles bandwidth but sacrifices guaranteed –40°C to +85°C operation - making LT1723IS8#PBF optimal for thermally demanding, noise-sensitive dual-channel video and broadband analog systems.
Availability
LT1723IS8#PBF is available at Aetrix Electronics and suitable for differential video transmission, DSL receiver front-ends, and active filter design requiring stable component supply across industrial temperature ranges.
Supply support for LT1723IS8#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 acquired Linear Technology in 2017 and maintains its high-performance analog IC portfolio, emphasizing precision, speed, and reliability in signal conditioning components.
The LT1723IS8#PBF belongs to Linear's LT172x family of low-noise, high-speed op-amps designed specifically for video, communications, and instrumentation applications demanding simultaneous DC accuracy and RF bandwidth.
FAQ
What is the maximum capacitive load the LT1723IS8#PBF can drive while remaining unity-gain stable?
The LT1723IS8#PBF is unity-gain stable with capacitive loads up to 100pF, as confirmed in the Absolute Maximum Ratings and Typical Performance Characteristics sections of the official datasheet. For loads exceeding 100pF, a 25Ω series resistor in the output path restores stability without degrading bandwidth significantly. This capability is critical for driving long PCB traces or cable capacitance in video line driver applications using the LT1723IS8#PBF.
Does the LT1723IS8#PBF support single-supply operation, and what is its output swing under those conditions?
Yes, the LT1723IS8#PBF is fully specified for single 5V operation. With a 500Ω load referenced to 2.5V, it delivers a 1.5V to 3.5V output swing - a 2V peak-to-peak range centered at mid-supply. This rail-complementary behavior enables true AC-coupled video buffering and level-shifting without negative supply rails, making the LT1723IS8#PBF suitable for portable and cost-sensitive video interface designs.
How does the input bias current cancellation technique in the LT1723IS8#PBF affect circuit design?
The LT1723IS8#PBF uses an internal bias current cancellation scheme that reduces net input bias current to <300nA while eliminating the need to match source impedances at +IN and –IN pins. This simplifies PCB layout and improves DC accuracy in high-impedance sensor interfaces. Unlike conventional op-amps, adding external balancing resistors degrades performance - so the LT1723IS8#PBF should be used with asymmetric source networks, as intended in its reference designs.
What is the thermal resistance (θJA) of the LT1723IS8#PBF in its SO-8 package, and how does it impact power dissipation?
The LT1723IS8#PBF in the SO-8 package has a junction-to-ambient thermal resistance (θJA) of 190°C/W, as documented in the Absolute Maximum Ratings table. At worst-case conditions (TA = 85°C, ±5V supplies, RL = 150Ω), total power dissipation is ~203mW, resulting in a calculated junction temperature of 124°C - safely below the 150°C absolute maximum. This confirms the LT1723IS8#PBF can operate reliably in compact industrial enclosures without forced air cooling.
Can the LT1723IS8#PBF be used as a drop-in replacement for older op-amps like the LT1363 or AD8055 in existing designs?
The LT1723IS8#PBF offers superior DC precision (400µV VOS max vs. 1.5mV for AD8055) and lower noise (3.8nV/√Hz vs. 6nV/√Hz), but differs in pinout: LT1363 and AD8055 use different SO-8 mappings (e.g., V+ on Pin 8). Therefore, the LT1723IS8#PBF is not a pin-compatible drop-in replacement. However, its identical SO-8 footprint and compatible supply/termination requirements allow straightforward redesign with improved performance - especially in video and communication applications where the LT1723IS8#PBF excels.
LT1723IS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 70V/µs
- Gain Bandwidth Product:
- 200 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 40 nA
- Voltage - Input Offset:
- 100 µV
- Current - Supply:
- 3.7mA (x2 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 10 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1723IS8#PBF FAQ
1.How can I place an order for LT1723IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1723IS8#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 LT1723IS8#PBF reliable?
The price and inventory of LT1723IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1723IS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1723IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1723IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1723IS8#PBF?
LT1723IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1723IS8#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 LT1723IS8#PBF?
For technical support, including LT1723IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1723IS8#PBF requirements.
6.How does Aetrix verify that LT1723IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1723IS8#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 LT1723IS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1723IS8#PBF?
All LT1723IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1723IS8#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 LT1723IS8#PBF part is unused and in its original packaging.
Return procedure for LT1723IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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