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Analog Devices Inc. LT1723CS8#PBF
- Part No.:
- LT1723CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1723CS8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:174
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Product details
Overview
LT1723CS8#PBF from Analog Devices (formerly Linear Technology) is a dual, low-noise, high-speed precision operational amplifier optimized for video and RF signal conditioning. It delivers 200MHz gain bandwidth, 70V/μs slew rate, 3.8nV/√Hz input voltage noise, ±3.4V output swing into 150Ω with ±5V supplies, and unity-gain stability up to 100pF capacitive load - enabling high-fidelity differential video line driving and active filter design.
For engineers reviewing the LT1723CS8#PBF datasheet, LT1723CS8#PBF pinout, LT1723CS8#PBF application, or LT1723CS8#PBF equivalent, key selection criteria include its dual-channel SO-8 package, specified 0°C to 70°C operating range, low-input-bias-current architecture with bias current cancellation, and verified performance in ADSL/VDSL receiver front-ends and wideband buffer stages.
Technical Context
The LT1723CS8#PBF employs a voltage-feedback topology built on Linear Technology's advanced low-voltage complementary bipolar process. Its folded-cascode first stage with degeneration resistor and bootstrapped current mirror enables simultaneous high DC gain (>10 V/mV), low input offset voltage (≤400 μV), and wide open-loop bandwidth.
It features input protection via back-to-back diodes per input pair and ESD clamps to both rails, allowing safe operation with differential inputs up to ±0.7V and common-mode voltages from –4V to +3.5V under ±5V supplies - critical for robustness in noisy communication interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 200MHz - ensures ≥60dB open-loop gain at 1MHz, supporting high-accuracy closed-loop gain control in video amplifiers. |
| Slew Rate | 70V/μs - enables full-swing response to fast transients without distortion in 1080p video timing paths. |
| Input Noise Voltage | 3.8nV/√Hz @ 10kHz - minimizes added noise in low-level signal chains such as DSL receiver baseband filters. |
| Output Drive | ±3.4V into 150Ω @ ±5V - directly drives 75Ω coaxial lines with 2× termination (e.g., CAT-5 twisted-pair video distribution). |
| Input Offset Voltage | 400μV max - supports DC-coupled active filters and instrumentation-grade signal conditioning without nulling circuitry. |
| Supply Current | 3.7mA per amplifier - balances speed and power efficiency for dual-channel applications in space-constrained designs. |
| Capacitive Load Stability | Stable up to 100pF - eliminates need for external isolation resistors when driving ADC input capacitance or long PCB traces. |
Pinout & Package
LT1723CS8#PBF is housed in an 8-lead plastic SO (Small Outline) package, 0.150-inch body width, with standard JEDEC MS-012AC footprint and gull-wing leads. Thermal resistance θJA = 190°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - capable of sourcing/sinking ≥23mA; requires local 0.1μF bypass capacitor. |
| 2 | V– | Negative supply rail - must be connected to ground or negative rail; shared return path for both amplifiers. |
| 3 | –IN A | Inverting input of Amplifier A - protected by back-to-back diodes; limit differential input to <±0.7V. |
| 4 | +IN A | Non-inverting input of Amplifier A - high-impedance node; source resistance ≤12kΩ recommended for optimal noise. |
| 5 | +IN B | Non-inverting input of Amplifier B - electrically isolated from Channel A; same input structure and protection. |
| 6 | –IN B | Inverting input of Amplifier B - independent bias current path; no need to match source impedances across channels. |
| 7 | OUT B | Amplifier B output - fully independent; supports differential output configurations with matched layout. |
| 8 | V+ | Positive supply rail - accepts +5V single-supply or ±5V dual-supply; decouple with 1μF tantalum + 0.1μF ceramic. |
Key Features
| Feature | Design Value |
|---|---|
| Low input bias current cancellation | IB ≤ 300nA - eliminates need for input bias compensation resistors in high-Z sensor interfaces. |
| Unity-gain stable architecture | No external compensation required - simplifies layout for gain-of-1 buffers and I-to-V converters. |
| Optimized total input noise | Minimum at 0.8k–12kΩ source resistance - enables best SNR in photodiode transimpedance and line-receiver applications. |
| Dual-channel channel separation | ≥82dB @ 1MHz - prevents crosstalk between video sync and luminance channels in multi-function video ICs. |
| Wide input common-mode range | –4V to +3.5V @ ±5V supplies - supports level-shifting and rail-to-rail input signal acquisition without attenuation. |
Applications
| Differential Video Line Driver | ADSL/VDSL Receiver Front-End |
|---|---|
Use Scenario: Driving balanced video signals over CAT-5 twisted-pair cables in broadcast monitoring systems. IC Role / Device Role / Timing Role: Dual-channel op amp configured as differential driver with 62.5Ω source termination and 125Ω load matching. Use Value: Maintains <–85dBc THD at 1MHz while delivering ±3.4V swing into 150Ω, preserving NTSC/PAL timing integrity and color fidelity. | Use Scenario: Baseband signal amplification and filtering in xDSL line cards prior to analog-to-digital conversion. IC Role / Device Role / Timing Role: Low-noise, high-linearity gain block for downstream receive path with DC-coupled active filter integration. Use Value: 3.8nV/√Hz input noise and 200MHz GBW enable >70dB SNR in 17MHz VDSL2 band without added gain-stage noise penalty. |
| Active Low-Pass Filter | High-Speed Buffer for Data Acquisition |
Use Scenario: 5th-order Butterworth anti-aliasing filter in 10MSps data acquisition modules. IC Role / Device Role / Timing Role: Dual op amp implementing Sallen-Key topology with precise pole placement via matched RC networks. Use Value: 70V/μs slew rate and 200MHz GBW ensure <0.01% settling in <112ns for 2V step inputs, meeting 12-bit accuracy requirements. | Use Scenario: Isolating and driving multiplexed analog sensor outputs to successive-approximation ADC inputs. IC Role / Device Role / Timing Role: Unity-gain buffer with low output impedance (<0.2Ω) and fast transient recovery after channel switching. Use Value: 0.15Ω typical output resistance and 100pF capacitive load tolerance eliminate droop and ringing during 1μs sample-and-hold transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4897-2ARMZ | Lower noise (1nV/√Hz), higher supply current (10.5mA), 220MHz GBW, MSOP-8 package. | Better suited for ultra-low-noise photodiode preamps; less optimal for power-sensitive video drivers. | Select when SNR >85dB is mandatory and supply headroom allows higher quiescent current. |
| LMH6629MA/NOPB | Higher slew rate (1000V/μs), wider supply range (±2.5V to ±6V), 1.5GHz GBW, SO-8 package. | Targeted at RF IF amplification above 100MHz; over-specified for baseband video and consumes more power. | Choose only when >500MHz small-signal bandwidth is required and thermal management is available. |
Compared with ADA4897-2ARMZ and LMH6629MA/NOPB, the LT1723CS8#PBF offers the optimal balance of noise (3.8nV/√Hz), speed (200MHz), and power (3.7mA/ch) for cost-sensitive, thermally constrained video and broadband communications designs - without requiring layout changes or additional decoupling complexity.
Availability
LT1723CS8#PBF is available at Aetrix Electronics and suitable for video line driving, DSL receiver front-ends, active filter implementation, and high-speed data acquisition systems requiring stable component supply across industrial and telecom production cycles.
Supply support for LT1723CS8#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 full product continuity, documentation, and technical support for the LT® series.
The LT1723CS8#PBF belongs to Linear Technology's precision high-speed op amp family, designed specifically for demanding analog signal paths in communications infrastructure, test equipment, and professional video systems where low noise, high bandwidth, and DC accuracy must coexist.
FAQ
What is the operating temperature range for the LT1723CS8#PBF?
The LT1723CS8#PBF is specified for operation from 0°C to 70°C. This commercial-grade temperature range is clearly indicated in the order information table of the datasheet and applies to all electrical characteristics marked with the ● symbol. It is not rated for extended industrial (–40°C to 85°C) operation unless the 'I' grade variant (LT1723IS8#PBF) is selected.
Does the LT1723CS8#PBF require external compensation for unity-gain stability?
No, the LT1723CS8#PBF is internally compensated for unity-gain stability with capacitive loads up to 100pF. The datasheet explicitly states "unity-gain stable (CLOAD ≤ 100pF)" and confirms stable operation in gain-of-1 configurations without added feedback capacitors - a key advantage over many high-speed op amps requiring external compensation networks.
Can the LT1723CS8#PBF drive a 75Ω coaxial cable directly?
Yes - the LT1723CS8#PBF can drive a 75Ω coaxial cable when configured as a differential line driver with proper termination. In the documented "Differential Video Line Driver" application, it sources ±3.4V into 150Ω (two 75Ω legs), matching standard video line impedance. For single-ended 75Ω loads, a series 37.5Ω resistor is recommended to maintain stability and minimize reflections.
What is the maximum output current capability of the LT1723CS8#PBF?
The LT1723CS8#PBF delivers a minimum output current of 23mA per amplifier under ±3V output swing conditions with ±5V supplies. Short-circuit current is rated at 35mA minimum. These values are guaranteed across the 0°C to 70°C operating range and enable direct driving of terminated video lines and moderate-impedance active filters without external boost stages.
How does the input bias current cancellation technique benefit circuit design with the LT1723CS8#PBF?
The LT1723CS8#PBF uses an input bias current cancellation technique that reduces net input bias current to ≤300nA while maintaining low input offset voltage. This eliminates the need to balance source impedances on inverting and non-inverting inputs - a critical simplification for high-precision active filters, transimpedance amplifiers, and DC-coupled sensor interfaces where resistor matching errors would otherwise degrade accuracy.
LT1723CS8#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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1723CS8#PBF FAQ
1.How can I place an order for LT1723CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1723CS8#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 LT1723CS8#PBF reliable?
The price and inventory of LT1723CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1723CS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1723CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1723CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1723CS8#PBF?
LT1723CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1723CS8#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 LT1723CS8#PBF?
For technical support, including LT1723CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1723CS8#PBF requirements.
6.How does Aetrix verify that LT1723CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1723CS8#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 LT1723CS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1723CS8#PBF?
All LT1723CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1723CS8#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 LT1723CS8#PBF part is unused and in its original packaging.
Return procedure for LT1723CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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