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Analog Devices Inc. LT1723CMS8#PBF
- Part No.:
- LT1723CMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LT1723CMS8#PBF.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,865
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Product details
Overview
LT1723CMS8#PBF from Analog Devices (formerly Linear Technology) is a dual, low-noise, high-speed precision operational amplifier in an 8-lead MSOP package. It delivers 200MHz gain bandwidth, 70V/μs slew rate, and 3.8nV/√Hz input voltage noise, operating from ±5V or single 5V supplies. It drives 150Ω loads to ±3V and supports unity-gain stability with ≤100pF capacitive load - ideal for differential video line drivers and wideband active filters.
For engineers reviewing the LT1723CMS8#PBF datasheet, LT1723CMS8#PBF pinout, LT1723CMS8#PBF application, or LT1723CMS8#PBF equivalent, key selection criteria include its specified 0°C to 70°C temperature range, MS8 package thermal resistance (θJA = 250°C/W), low 400μV max input offset voltage, and verified performance in ADSL/VDSL receiver front-ends and high-fidelity buffer stages.
Technical Context
The LT1723CMS8#PBF implements a voltage-feedback architecture with a folded-cascode first stage and complementary emitter-follower output stage, optimized for simultaneous high DC accuracy and wideband AC performance. Its input bias current cancellation technique eliminates the need for matched source impedances, and internal protection diodes limit differential input voltage to ±0.7V.
It operates stably under ±5V or single 5V supply conditions, delivering rail-to-rail-compatible output swing (±3.1V into 150Ω) and maintaining ≥82dB channel separation at 1MHz. The device is characterized for 0°C to 70°C operation and exhibits guaranteed 200MHz gain bandwidth only under ±5V conditions per datasheet Note 10.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 200MHz - enables stable closed-loop gain >100 at 2MHz video frequencies |
| Slew Rate | 70V/μs - supports full-swing 10MHz square waves without distortion |
| Input Noise Voltage | 3.8nV/√Hz @ 10kHz - optimal for source impedances 0.8k–12kΩ |
| Input Offset Voltage | 400μV max - ensures <0.5% error in 12-bit data acquisition systems |
| Supply Current | 3.7mA per amplifier - enables dual-channel operation below 8mA total at ±5V |
| Capacitive Load Drive | Stable up to 100pF - allows direct connection to ADC input capacitance or long PCB traces |
| Output Current | 23mA min - drives 150Ω CAT-5 twisted-pair lines with 6Vpp differential signal |
Pinout & Package
The LT1723CMS8#PBF is housed in an 8-lead plastic MSOP (MS8) package, 3mm × 3mm × 0.85mm profile, with exposed pad not electrically connected. Thermal resistance θJA = 250°C/W reflects its compact footprint and moderate power dissipation capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A | Inverting amplifier output A | Delivers full-swing output referenced to V–; requires local 0.1μF bypass to V– |
| –IN A | Inverting input A | High-impedance node; protected by back-to-back diodes limiting differential voltage to ±0.7V |
| +IN A | Non-inverting input A | Matches –IN A in bias current; no external balancing resistor required |
| V– | Negative supply rail | Reference for both amplifiers; must be decoupled with 1μF tantalum + 0.1μF ceramic |
| V+ | Positive supply rail | Shared supply for both channels; same decoupling as V– |
| +IN B | Non-inverting input B | Independent of Channel A; ESD clamped to V+ and V– |
| –IN B | Inverting input B | Electrically isolated from Channel A inputs; supports separate feedback networks |
| OUT B | Inverting amplifier output B | Independent output; layout symmetry recommended to minimize crosstalk (>82dB) |
Key Features
| Feature | Design Value |
|---|---|
| Low input noise voltage | 3.8nV/√Hz enables high-SNR signal conditioning in RF/IF receiver chains |
| Unity-gain stability | Operates stably with CL ≤ 100pF - eliminates need for external compensation in most buffer designs |
| Input bias current cancellation | Reduces effective IB to tens of nA - removes requirement for matched source resistors |
| Dual-channel isolation | 82dB channel separation at 1MHz - preserves signal integrity in differential line drivers |
| Wide supply range | Operates on ±2.3V to ±5.5V or single 5V - supports legacy 5V systems and low-voltage mixed-signal boards |
Applications
| Differential Video Line Driver | ADSL/VDSL Receiver Front-End |
|---|---|
Use Scenario: Driving balanced 62.5Ω CAT-5 twisted-pair cable over 100m with multiburst video signals. IC Role / Device Role / Timing Role: Dual op-amp configured as differential driver with gain = 1, rejecting common-mode noise on long cables. Use Value: 70V/μs slew rate ensures <1% distortion at 5MHz; 200MHz GBW maintains flat group delay across NTSC/PAL baseband. | Use Scenario: Amplifying weak analog signals from DSL line interface ICs before ADC sampling. IC Role / Device Role / Timing Role: Low-noise preamplifier stage with 10–20dB gain, DC-coupled to preserve low-frequency DSL tones. Use Value: 3.8nV/√Hz input noise dominates only above 12kΩ source impedance - matches typical line transformer secondaries. |
| High-Speed Active Filter | 12-Bit Data Acquisition Buffer |
Use Scenario: Implementing 4th-order Butterworth anti-aliasing filter at 5MHz cutoff for 10MSPS ADCs. IC Role / Device Role / Timing Role: Dual-channel voltage-feedback op-amp in MFB topology, each channel handling one 2nd-order section. Use Value: 200MHz GBW provides >40dB open-loop gain at 5MHz - ensures filter Q and fc accuracy within ±0.5%. | Use Scenario: Isolating precision DAC outputs or sensor front-ends from multiplexed ADC inputs. IC Role / Device Role / Timing Role: Unity-gain buffer with low VOS (≤400μV) and high CMRR (≥80dB) to prevent channel crosstalk. Use Value: 400μV max VOS contributes <0.1 LSB error in 12-bit (2.5V full-scale) systems; 23mA drive handles 500Ω ADC input loads. |
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 |
|---|---|---|---|
| ADA4898-2ARMZ | Lower 1.1nV/√Hz noise, higher 290MHz GBW, but 12.5mA supply current per amp | Better SNR in ultra-low-noise IF amps; less suitable for battery-powered or thermally constrained designs | Choose ADA4898-2ARMZ when noise floor is critical and power budget allows ≥25mA total |
| LMH6629MA/NOPB | Higher 400MHz GBW, 1000V/μs slew rate, but 5.5mA supply current and 1.2mV VOS max | Superior for >10MHz small-signal amplification; less accurate for DC-coupled precision buffering | Choose LMH6629MA/NOPB for wideband AC-coupled gain stages where DC offset is filtered out |
Compared with LT1723CMS8#PBF, ADA4898-2ARMZ offers superior noise and bandwidth at triple the quiescent power, while LMH6629MA/NOPB trades DC precision for extreme speed - making LT1723CMS8#PBF the optimal balance for cost-sensitive, thermally constrained dual-channel video and DSL applications requiring sub-400μV offset and proven 100pF capacitive load stability.
Availability
LT1723CMS8#PBF is available at Aetrix Electronics and suitable for differential video transmission, DSL receiver front-ends, high-speed active filtering, and precision data acquisition systems requiring stable component supply across industrial and communications equipment lifecycles.
Supply support for LT1723CMS8#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 support, documentation, and manufacturing continuity for the LT172x family.
The LT1723CMS8#PBF belongs to Linear Technology's precision high-speed op-amp product line, designed specifically for applications demanding low noise, low distortion, and wide bandwidth in space-constrained dual-channel configurations - especially video, DSL, and instrumentation signal paths.
FAQ
What is the maximum capacitive load the LT1723CMS8#PBF can drive while remaining unity-gain stable?
The LT1723CMS8#PBF is unity-gain stable with capacitive loads up to 100pF, as confirmed in the Absolute Maximum Ratings and Applications Information sections of the official datasheet. Driving larger loads requires series isolation (e.g., 25Ω) or feedback compensation. This 100pF limit applies directly to the LT1723CMS8#PBF in its MS8 package under ±5V supply conditions.
Does the LT1723CMS8#PBF require matched input resistors for optimal DC performance?
No. The LT1723CMS8#PBF uses an input bias current cancellation technique, so matching source resistances at +IN and –IN is unnecessary and may degrade DC accuracy. The datasheet explicitly advises against adding balancing resistors, especially above 12kΩ, as they increase noise and offset drift. This behavior is intrinsic to the LT1723CMS8#PBF design.
What is the guaranteed operating temperature range for the LT1723CMS8#PBF?
Per the Order Information table, the LT1723CMS8#PBF is specified for 0°C to 70°C operation. It is part of the 'C' grade (commercial) variant, distinct from the 'I' grade (–40°C to 85°C) versions like LT1723IMS8#PBF. All electrical characteristics in the datasheet marked with ● apply strictly within this 0°C to 70°C range for the LT1723CMS8#PBF.
Can the LT1723CMS8#PBF operate from a single 5V supply, and what is its output swing under that condition?
Yes, the LT1723CMS8#PBF is fully specified for single 5V operation. With a 500Ω load referenced to 2.5V, its output swings from 1.5V to 3.5V - a 2Vpp range centered at mid-supply. This rail-complementary behavior makes the LT1723CMS8#PBF suitable for single-supply data acquisition and video driver applications without level-shifting circuitry.
How does the LT1723CMS8#PBF achieve low input noise while maintaining low supply current?
The LT1723CMS8#PBF achieves 3.8nV/√Hz input voltage noise at only 3.7mA per amplifier by optimizing its internal bipolar transistor geometry and biasing on Linear Technology's advanced low-voltage complementary bipolar process. The noise-performance trade-off is tuned for source resistances between 0.8kΩ and 12kΩ - a range where thermal noise from the source dominates, allowing the LT1723CMS8#PBF to minimize its own contribution without excessive current draw.
LT1723CMS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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:
- 150 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-MSOP
LT1723CMS8#PBF FAQ
1.How can I place an order for LT1723CMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1723CMS8#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 LT1723CMS8#PBF reliable?
The price and inventory of LT1723CMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1723CMS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1723CMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1723CMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1723CMS8#PBF?
LT1723CMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1723CMS8#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 LT1723CMS8#PBF?
For technical support, including LT1723CMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1723CMS8#PBF requirements.
6.How does Aetrix verify that LT1723CMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1723CMS8#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 LT1723CMS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1723CMS8#PBF?
All LT1723CMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1723CMS8#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 LT1723CMS8#PBF part is unused and in its original packaging.
Return procedure for LT1723CMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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