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Analog Devices Inc. LT1057ACN8#PBF
- Part No.:
- LT1057ACN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1057ACN8#PBF.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:141
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Product details
Overview
LT1057ACN8#PBF from Analog Devices (formerly Linear Technology) is a dual JFET-input precision high-speed operational amplifier in an 8-lead PDIP package, featuring 14 V/µs slew rate, 5 MHz gain-bandwidth product, 250 µV max input offset voltage, and 50 pA bias current at 70°C. It serves as a drop-in upgrade for LF412A and OP-215 in instrumentation amplifiers, photodiode front-ends, and precision sample-and-hold circuits.
For engineers reviewing the LT1057ACN8#PBF datasheet, LT1057ACN8#PBF pinout, LT1057ACN8#PBF application, or LT1057ACN8#PBF equivalent, key selection criteria include guaranteed AC performance over 0°C to 70°C, low 13 nV/√Hz input noise density at 1 kHz, and phase-reversal immunity beyond –12 V common-mode input - critical for servo stability and high-impedance sensor interfaces.
Technical Context
The LT1057ACN8#PBF employs matched JFET input pairs with laser-trimmed thin-film resistors to achieve low offset and drift. Its architecture avoids phase reversal by incorporating internal protection circuitry that clamps input stage conduction when common-mode voltage exceeds –12 V under ±15 V supplies.
It delivers fast settling (1.3 µs to 0.02%) and high channel separation (132 dB DC to 5 kHz), enabled by isolated die layout and optimized compensation. The N8 plastic DIP package supports through-hole prototyping and legacy board compatibility without requiring layout changes from LF412A footprints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 14 V/µs min - enables clean 10 Vpp output at ≥1 MHz without slewing distortion |
| Gain-Bandwidth Product | 5 MHz typ - supports stable unity-gain buffer or gain-of-100 amplification up to 50 kHz |
| Input Offset Voltage | 250 µV max at 25°C - ensures ≤0.25 mV error in 10 V full-scale precision measurement paths |
| Bias Current | ±50 pA max at 70°C - preserves signal integrity in >100 MΩ source impedance applications (e.g., photodiodes) |
| Input Noise Density | 13 nV/√Hz at 1 kHz - contributes <1.3 µV RMS noise in 10 kHz bandwidth, critical for low-level analog sensing |
| Common-Mode Rejection | 98 dB min - rejects >99.9% of 1 V common-mode interference on differential inputs |
| Supply Current | 2.8 mA per amplifier max - allows dual-channel operation within 6 mA total budget for low-power systems |
Pinout & Package
Package: 8-lead plastic DIP (N8), 0.300-inch width, through-hole mount, RoHS-compliant #PBF finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Amplifier A output - drives loads up to ±13 V swing into 2 kΩ |
| 2 | Inverting Input A | High-impedance (≥1 TΩ) node - requires guard ring routing for picoampere-level leakage control |
| 3 | Non-inverting Input A | Matched to Pin 2 for CMRR optimization - ties to reference or sensor in non-inverting configurations |
| 4 | V– | Negative supply rail - must be decoupled locally with 0.1 µF ceramic capacitor |
| 5 | V+ | Positive supply rail - accepts ±15 V nominal; absolute max ±20 V |
| 6 | Output B | Amplifier B output - electrically isolated from Output A; shares no internal substrate coupling |
| 7 | Inverting Input B | Independent high-Z input - enables dual-channel simultaneous sampling without crosstalk |
| 8 | Non-inverting Input B | Matched pair with Pin 7 - supports differential input stages or independent signal conditioning |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Operates safely down to –14 V common-mode input (±15 V supplies), eliminating servo lock-up risks |
| Low 1/f noise corner | 28 Hz corner frequency - maintains flat 13 nV/√Hz density above audio band for precision DC-coupled designs |
| Matched dual topology | Guaranteed tracking of offset voltage and drift between channels - essential for differential instrumentation |
| High input resistance | ≥1 TΩ differential and common-mode impedance - minimizes loading on high-Z sources like piezoelectric sensors |
| Fast settling to 0.02% | 1.3 µs settling time - meets requirements for 1 MSPS data acquisition with 12-bit accuracy |
Applications
| Photodiode Amplifier | Precision Sample-and-Hold |
|---|---|
Use Scenario: Converting weak photocurrents (nA–µA range) from scientific-grade PIN photodiodes into stable voltage outputs. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias current and 13 nV/√Hz noise density. Use Value: Enables 100 dB dynamic range detection with sub-picoamp resolution, validated in LT1057/LT1058 TA10 reference design. | Use Scenario: Capturing and holding fast analog waveforms (e.g., radar pulses, ultrasound echoes) with minimal droop and aperture error. IC Role / Device Role / Timing Role: Buffer amplifier driving the hold capacitor; leverages 14 V/µs slew rate and 1.3 µs settling to 0.02%. Use Value: Supports ≤1 µs acquisition windows at 12-bit linearity, confirmed in LT1055/LT1056 application note test circuits. |
| Instrumentation Amplifier Front-End | Logarithmic Converter for Optical Sensing |
Use Scenario: Conditioning low-level bridge signals (e.g., strain gauges, pressure transducers) in industrial test equipment. IC Role / Device Role / Timing Role: First-stage gain block with 98 dB CMRR and matched dual topology for common-mode rejection. Use Value: Achieves <0.01% gain error over temperature via laser-trimmed resistor matching, per LT1057/LT1058 TA09 schematic. | Use Scenario: Compressing 100 dB optical intensity range (1 nW–100 µW) into linear voltage output for fiber-optic power monitoring. IC Role / Device Role / Timing Role: Core amplifier in diode-log configuration; exploits low VOS drift (≤7 µV/°C) for stable log slope over temperature. Use Value: Maintains ±0.1 V accuracy across 0°C–70°C ambient, demonstrated in LT1057/LT1058 TA10 logarithmic photodiode circuit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual JFET-input op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL082CP | Higher 15 mV max VOS, 200 pA bias current at 25°C, no phase-reversal protection | Limited to non-critical AC-coupled or low-precision DC applications | Select only if cost sensitivity outweighs precision and stability requirements |
| LF412CN | 10 V/µs slew rate, 4 MHz GBW, 500 µV max VOS, susceptible to phase reversal below –12 V | Acceptable for legacy designs where LT1057ACN8#PBF socket replacement is not required | Choose when upgrading existing LF412-based boards but retaining original performance envelope |
Compared with TL082CP and LF412CN, the LT1057ACN8#PBF delivers 5× lower offset voltage, 4× faster slew rate, and guaranteed phase-reversal immunity - making it the sole option among the three for high-stability servo loops and picoampere-sensitivity photodiode interfaces.
Availability
LT1057ACN8#PBF is available at Aetrix Electronics and suitable for precision instrumentation, medical sensor front-ends, and industrial test equipment requiring stable component supply across extended production lifecycles.
Supply support for LT1057ACN8#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 support for its precision analog portfolio, including legacy op amps with military- and industrial-grade reliability.
The LT1057 series was designed specifically for high-speed precision applications demanding both JFET input impedance and bipolar-like speed - bridging the gap between legacy LF-series devices and modern rail-to-rail solutions.
FAQ
What is the maximum operating temperature range for the LT1057ACN8#PBF?
The LT1057ACN8#PBF is rated for 0°C to 70°C ambient operation, as indicated by the "AC" grade suffix. This range is validated per the manufacturer's electrical characteristics tables for parameters including input offset voltage (250 µV max), bias current (±50 pA max at 70°C), and CMRR (98 dB min). Operation outside this range may violate guaranteed specifications.
Does the LT1057ACN8#PBF require external compensation for unity-gain stability?
No, the LT1057ACN8#PBF is internally compensated for unity-gain stability. Its phase margin is specified at 58° with 10 pF capacitive load (per G14 plot), and it remains stable driving ≥100 pF loads in unity-gain follower configurations. External compensation is unnecessary unless driving highly reactive loads (>1 µF) or operating in high-frequency closed-loop gains >100.
Can the LT1057ACN8#PBF replace the LF412A in existing sockets without modification?
Yes, the LT1057ACN8#PBF uses the industry-standard 8-pin PDIP footprint and pinout identical to the LF412A, enabling direct socket replacement. The datasheet explicitly states "The LT1057 may be inserted directly in LF412A sockets," and both share identical pin functions: Pins 1/6 = outputs, 2/7 = inverting inputs, 3/8 = non-inverting inputs, 4 = V–, 5 = V+.
What is the typical input noise voltage density of the LT1057ACN8#PBF at 10 Hz?
The LT1057ACN8#PBF exhibits 26 nV/√Hz input noise voltage density at 10 Hz, as specified in the Electrical Characteristics table (page 3). This value reflects its 1/f noise behavior and is critical for low-frequency precision applications such as DC-coupled sensor signal conditioning where sub-Hz bandwidths dominate.
Is the LT1057ACN8#PBF RoHS compliant and lead-free?
Yes, the "#PBF" suffix in LT1057ACN8#PBF denotes lead-free (Pb-free) packaging per RoHS Directive 2011/65/EU. The device uses matte tin lead finish and complies with JEDEC J-STD-609A Class 2a marking requirements. Full compliance documentation is available in Analog Devices' official product change notices for the LT1057 family.
LT1057ACN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 14V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 pA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 1.6mA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 20 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1057ACN8#PBF FAQ
1.How can I place an order for LT1057ACN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1057ACN8#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 LT1057ACN8#PBF reliable?
The price and inventory of LT1057ACN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1057ACN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1057ACN8#PBF?
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4.How is shipping managed for LT1057ACN8#PBF?
LT1057ACN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1057ACN8#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 LT1057ACN8#PBF?
For technical support, including LT1057ACN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1057ACN8#PBF requirements.
6.How does Aetrix verify that LT1057ACN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1057ACN8#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 LT1057ACN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1057ACN8#PBF?
All LT1057ACN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1057ACN8#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 LT1057ACN8#PBF part is unused and in its original packaging.
Return procedure for LT1057ACN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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