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Analog Devices Inc. LT1357CN8#PBF
- Part No.:
- LT1357CN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1357CN8#PBF.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,821
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Product details
Overview
LT1357CN8#PBF from Analog Devices (formerly Linear Technology) is a high-speed, voltage-feedback operational amplifier with current-feedback slewing behavior, designed for precision data acquisition and fast settling applications. It delivers 25MHz gain bandwidth, 600V/µs slew rate at ±15V supplies, 8nV/√Hz input noise, and unity-gain stability into any capacitive load - enabling use in DAC I-to-V converters, active filters, and photodiode amplifiers.
For engineers reviewing the LT1357CN8#PBF datasheet, LT1357CN8#PBF pinout, LT1357CN8#PBF application, or LT1357CN8#PBF equivalent, key selection criteria include its C-load stability, low 2.5mA max supply current at ±15V, ±12V output swing into 500Ω, 115ns 0.1% settling time (10V step), and guaranteed performance across –40°C to +85°C.
Technical Context
The LT1357CN8#PBF employs a single-stage voltage-feedback topology with complementary NPN/PNP input buffering and a high-impedance gain node, enabling both high DC gain (20V/mV min at RL=1k) and current-feedback–like slewing. Its internal compensation dynamically adapts to capacitive loads via bootstrapped RC networks, ensuring stability without external components.
This architecture achieves 220ns 0.01% settling (10V step) and maintains ≥7dB open-loop gain margin at 10MHz, while supporting rail-to-rail input common-mode range (±13.4V at ±15V supplies) and differential gain/phase <0.1%/0.5° at 3.58MHz - critical for video and instrumentation signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 25MHz typical at ±15V - enables stable closed-loop operation up to 10MHz with AV ≥ 2.5. |
| Slew Rate | 600V/µs typical at ±15V, AV = –2 - supports full-scale 10V transitions in ≤17ns, essential for fast DAC buffering. |
| Input Noise Voltage | 8nV/√Hz at 10kHz - preserves SNR in low-level sensor and photodiode amplification stages. |
| Supply Current | 2.5mA maximum at ±15V - balances speed and power efficiency for portable or thermally constrained systems. |
| Output Swing | ±12V into 500Ω at ±15V supplies - drives standard 50Ω/75Ω cables and ADC inputs without level-shifting. |
| Settling Time | 115ns to 0.1%, 10V step, AV = –1 - meets 12-bit accuracy requirements in multiplexed data acquisition. |
| Capacitive Load Drive | Stable with unlimited capacitive load - eliminates need for isolation resistors in buffer, cable driver, or anti-alias filter applications. |
Pinout & Package
N8 package: 8-lead plastic DIP (0.300" wide), through-hole mount, θJA = 130°C/W. RoHS-compliant, Pb-free finish (#PBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | NULL | Offset null pins - connect external 10kΩ potentiometer wiper to V–, ends to V+ and V– for fine DC offset trimming. |
| 2 | –IN | Inverting input - high-impedance node (80MΩ differential, 35MΩ common-mode) with bipolar PNP/NPN cancellation. |
| 3 | +IN | Non-inverting input - matched to –IN for CMRR ≥97dB; accepts input voltages from –13.2V to +13.4V at ±15V supplies. |
| 4 | V– | Negative supply terminal - supports ±2.5V to ±15V dual supplies; total supply voltage ≤36V. |
| 5 | NC | No connect - internally unused; must remain unconnected per datasheet. |
| 6 | VOUT | Amplifier output - capable of ±2.5V into 150Ω (±5V supplies) or ±12V into 500Ω (±15V supplies); short-circuit safe. |
| 7 | V+ | Positive supply terminal - complements V–; supplies must be symmetric for specified AC performance. |
Key Features
| Feature | Design Value |
|---|---|
| C-Load™ stability | Guaranteed unity-gain stability with any capacitive load - eliminates external compensation in cable drivers and filter buffers. |
| High slew rate / low IQ trade-off | 600V/µs slew at only 2.5mA supply current - outperforms legacy 50MHz op-amps drawing >4mA. |
| Wide supply range | Operates from ±2.5V to ±15V - supports low-voltage portable designs and high-dynamic-range industrial systems on same platform. |
| Low distortion at high frequency | 0.1% differential gain / 0.5° differential phase at 3.58MHz - suitable for composite video and medical imaging front-ends. |
| Fast settling with precision | 115ns to 0.1% (10V step) and 20V/mV minimum DC gain - enables accurate 12-bit+ sampling in time-multiplexed systems. |
Applications
| DAC I-to-V Conversion | Active Anti-Aliasing Filter |
|---|---|
|
Use Scenario: Converting 12–16-bit DAC current outputs (e.g., AD5422) into precise, low-noise voltage signals for ADC input or analog control loops. IC Role / Device Role / Timing Role: High-speed transimpedance amplifier with C-load stability, driving 100pF–1nF filter capacitance directly. Use Value: Eliminates external isolation resistor and compensation network, reducing board area and preserving 115ns settling for 1MSPS data rates. |
Use Scenario: Implementing 4th-order Butterworth low-pass filtering before high-speed ADCs in oscilloscopes or spectrum analyzers. IC Role / Device Role / Timing Role: Unity-gain stable, low-distortion buffer and gain stage in Sallen-Key or multiple-feedback topologies. Use Value: Maintains flat group delay and <0.1% gain error up to 250kHz while driving 1nF capacitor banks without peaking. |
| Photodiode Transimpedance Amplifier | Video Line Driver |
|
Use Scenario: Amplifying low-level photocurrents (pA–nA) from scientific or medical photodiodes with minimal added noise. IC Role / Device Role / Timing Role: Low-noise (8nV/√Hz), low-input-bias-current (500nA max) TIA front-end with programmable gain. Use Value: Achieves >100dB dynamic range at 10kHz while rejecting common-mode interference via 97dB CMRR. |
Use Scenario: Driving 75Ω coaxial video lines (SD/HD composite, Y/C) with minimal overshoot and phase distortion. IC Role / Device Role / Timing Role: High-slew, low-phase-error buffer with 0.1% differential gain and 0.5° differential phase at 3.58MHz. Use Value: Preserves color fidelity and timing integrity in broadcast equipment without requiring external termination networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1358CS8#PBF | Dual-channel version in SOIC-8; identical AC specs but higher 5mA max supply current per amplifier. | Preferred for space-constrained dual-amplifier circuits (e.g., instrumentation amp front-end), not single-channel cost-sensitive designs. | Select when needing two matched high-speed amps on one die; avoid if only one channel required and DIP footprint is preferred. |
| LT1360CS8#PBF | Higher 50MHz GBW and 800V/µs slew rate, but 4mA supply current and no guaranteed C-load stability. | Suitable for >30MHz signal paths where capacitive loading is controlled externally; not drop-in for direct cable drive. | Choose for bandwidth-critical RF/IF stages; reject if driving unknown or variable capacitive loads without redesign. |
Compared with LT1358CS8#PBF and LT1360CS8#PBF, the LT1357CN8#PBF uniquely combines DIP packaging, lowest supply current among 25MHz-class op-amps, and unconditional capacitive-load stability - making it optimal for legacy-compatible, thermally sensitive, or unbuffered cable-driving applications.
Availability
LT1357CN8#PBF is available at Aetrix Electronics and suitable for data acquisition systems, precision instrumentation, video line driving, and photodiode amplification requiring stable component supply across extended temperature ranges.
Supply support for LT1357CN8#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; Linear pioneered high-performance analog ICs with emphasis on precision, speed, and robustness in harsh environments.
The LT1357CN8#PBF belongs to Linear's C-Load™ op-amp family, engineered for applications demanding simultaneous high speed, low noise, and unconditional stability into reactive loads - especially in test equipment, medical imaging, and industrial automation.
FAQ
What is the maximum capacitive load the LT1357CN8#PBF can drive without oscillation?
The LT1357CN8#PBF is explicitly characterized and guaranteed stable with *any* capacitive load - including infinite capacitance - due to its adaptive C-Load™ compensation architecture. This eliminates the need for external series resistors or feedback capacitors in cable driver, filter, or DAC buffer configurations, unlike conventional op-amps which require careful load-dependent compensation.
Does the LT1357CN8#PBF support single-supply operation?
The LT1357CN8#PBF is specified for dual-supply operation (±2.5V to ±15V) and does not support true single-supply use. Its input common-mode range extends to within ~1.1V of V– and ~1.7V of V+, and output swing is asymmetric near rails. For single-supply applications, consider rail-to-rail input/output op-amps like the ADA4897-1, not the LT1357CN8#PBF.
What is the purpose of the NC pin (Pin 5) on the LT1357CN8#PBF?
Pin 5 of the LT1357CN8#PBF is designated NC (No Connect) and is internally unused. The datasheet mandates that this pin remain unconnected - soldering or routing to any net may compromise device reliability or AC performance. It serves solely as a mechanical placeholder in the 8-pin DIP layout.
How does the LT1357CN8#PBF achieve both high slew rate and low supply current?
The LT1357CN8#PBF uses a patented topology combining complementary NPN/PNP input followers with a 500Ω input resistor and mirrored current sources at the gain node. This allows large transient currents for slewing while maintaining low quiescent current (2.5mA max) - unlike traditional current-feedback op-amps that draw >5mA. The result is 600V/µs slew at just 2.5mA, a 2× efficiency gain over peers.
Can the LT1357CN8#PBF replace older op-amps like the LM7171 in existing designs?
The LT1357CN8#PBF can replace the LM7171 in many high-speed applications but requires validation of pin compatibility (both are 8-pin DIP) and nulling circuit removal - the LT1357CN8#PBF uses Pins 1/8 for offset null, whereas LM7171 uses Pins 1/5. Also, LT1357CN8#PBF offers lower input bias current (500nA vs 1.7µA), lower noise (8nV/√Hz vs 10nV/√Hz), and guaranteed C-load stability - advantages requiring layout review but no schematic change.
LT1357CN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- C-Load™
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 600V/µs
- Gain Bandwidth Product:
- 25 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 120 nA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 2mA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1357CN8#PBF FAQ
1.How can I place an order for LT1357CN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1357CN8#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 LT1357CN8#PBF reliable?
The price and inventory of LT1357CN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1357CN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1357CN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1357CN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1357CN8#PBF?
LT1357CN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1357CN8#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 LT1357CN8#PBF?
For technical support, including LT1357CN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1357CN8#PBF requirements.
6.How does Aetrix verify that LT1357CN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1357CN8#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 LT1357CN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1357CN8#PBF?
All LT1357CN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1357CN8#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 LT1357CN8#PBF part is unused and in its original packaging.
Return procedure for LT1357CN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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