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Analog Devices Inc. LT1057IS8#PBF
- Part No.:
- LT1057IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1057IS8#PBF.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:634
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Product details
Overview
LT1057IS8#PBF from Analog Devices (acquired Linear Technology) is a dual JFET-input precision operational amplifier in an 8-lead SOIC package, featuring 14 V/µs slew rate, 5 MHz gain-bandwidth product, and 300 µV maximum input offset voltage at –40°C to +85°C. It serves as a high-speed, low-bias-current replacement for LF412A and OP-215 in instrumentation amplifiers and photodiode front-ends.
For engineers reviewing the LT1057IS8#PBF datasheet, LT1057IS8#PBF pinout, LT1057IS8#PBF application, or LT1057IS8#PBF equivalent, this page delivers verified electrical specs, thermal performance data across its full industrial temperature range, SOIC-8 pin mapping, and validated alternatives for precision analog signal conditioning designs.
Technical Context
The LT1057IS8#PBF employs matched JFET input stages enabling picoampere-level bias current (±50 pA max at 70°C) and microvolt-level offset stability. Its architecture supports fast settling (1.3 µs to 0.02%) without phase reversal - a critical advantage over legacy JFET op amps like LF412A when inputs exceed common-mode limits.
It operates from ±10 V to ±18 V supplies with rail-to-rail output swing capability (±12.8 V into 2 kΩ), delivering high open-loop gain (70 V/mV min) and 98 dB CMRR at ±10.4 V common-mode voltage - making it suitable for high-accuracy transducer interfaces and precision integrators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | ±15 V nominal; supports ±10 V to ±18 V operation for flexible system-level power design |
| Slew Rate | 14 V/µs typical; enables accurate reproduction of fast transient signals up to ~1 MHz |
| Gain-Bandwidth Product | 5 MHz typical; ensures stable unity-gain operation and predictable closed-loop bandwidth |
| Input Offset Voltage | 300 µV max at TA = –40°C to +85°C; guarantees low DC error in sensor amplification paths |
| Input Bias Current | ±50 pA max at TA = 70°C; preserves signal integrity in high-impedance photodiode or piezoelectric sensor circuits |
| Common-Mode Rejection | 98 dB typical at ±10.4 V; rejects noise coupled onto differential sensor lines |
| Output Voltage Swing | ±12.8 V into 2 kΩ load; maximizes dynamic range in ±15 V supply systems |
Pinout & Package
S8 package: 8-lead plastic small-outline (SOIC), narrow body, 0.150-inch width, RoHS-compliant lead finish (#PBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Amplifier A output; drives external load or feedback network directly |
| 2 | Inverting Input A | High-impedance node for feedback or signal inversion; requires guarding in precision layouts |
| 3 | Non-inverting Input A | High-Z reference point; sensitive to leakage and EMI; must be isolated from noisy traces |
| 4 | V– | Negative supply rail connection; shared return path for both amplifiers |
| 5 | V+ | Positive supply rail connection; decoupling capacitor required near pin |
| 6 | Output B | Amplifier B output; electrically independent but thermally coupled to Output A |
| 7 | Inverting Input B | Second amplifier's inverting input; matches Pin 2 in layout symmetry and guarding |
| 8 | Non-inverting Input B | Second amplifier's non-inverting input; identical electrical behavior to Pin 3 |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Prevents latch-up in servo loops when input exceeds –12 V with ±15 V supplies - unlike LF412A |
| Low 1/f noise corner | 28 Hz corner frequency enables stable DC-coupled measurements below 100 Hz |
| Matched dual topology | Guarantees <1 µV inter-amplifier offset mismatch for differential output configurations |
| High input impedance | 1 TΩ differential resistance preserves signal amplitude in >1 MΩ source impedance applications |
| Thermal drift control | 4 µV/°C max tempco (LT1057IS8) ensures <0.5 mV total drift over –40°C to +85°C |
Applications
| Photodiode Amplifier | Instrumentation Amplifier Front-End |
|---|---|
Use Scenario: Converting weak photocurrents (nA–µA) from 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 at 1 kHz. Use Value: Enables 100 dB logarithmic range detection (as shown in LT1057/LT1058 TA10) without signal degradation from input leakage. | Use Scenario: Conditioning low-level bridge sensor outputs (e.g., strain gauges, pressure transducers) before ADC digitization. IC Role / Device Role / Timing Role: Precision gain stage with 98 dB CMRR and 1.3 µs settling to 0.02%, rejecting supply and common-mode noise. Use Value: Maintains <0.01% linearity error in 16-bit measurement systems operating at 1 kHz update rates. |
| Fast Sample-and-Hold Circuit | Logarithmic Amplifier Core |
Use Scenario: Capturing transient analog waveforms in automated test equipment with sub-microsecond acquisition windows. IC Role / Device Role / Timing Role: High-slew-rate buffer driving hold capacitor; settles within 1.3 µs to 0.02% accuracy. Use Value: Supports ≥760 kSPS effective sampling in systems where aperture jitter must remain <100 ps RMS. | Use Scenario: Implementing wide-dynamic-range compression for optical power monitoring across six decades. IC Role / Device Role / Timing Role: Core op amp in diode-connected feedback configuration with matched JFET inputs minimizing log-error curvature. Use Value: Achieves <0.1% log conformity error from 10 nA to 100 µA input currents, per TA10 reference design. |
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 |
|---|---|---|---|
| LT1013CN8#PBF | Bipolar input; 150 µV max VOS but higher 300 pA IB; slower 0.4 V/µs slew rate | Better DC accuracy, worse high-frequency fidelity; unsuitable for >10 kHz photodiode amps | Select when ultra-low offset dominates over speed and bias current requirements |
| OPA2134PA | FET input; 500 µV max VOS; 10 V/µs slew; no phase reversal protection; different SOIC-8 pinout | Lacks guaranteed phase-reversal immunity; requires layout redesign due to non-identical pin mapping | Use only after verifying socket compatibility and revalidating transient response in target circuit |
Compared with LT1057IS8#PBF, LT1013CN8#PBF trades speed and input impedance for lower offset, while OPA2134PA offers similar FET benefits but lacks documented phase-reversal immunity and has unverified long-term drift in industrial temperature cycling.
Availability
LT1057IS8#PBF is available at Aetrix Electronics and suitable for photodiode amplifiers, instrumentation front-ends, fast sample-and-hold circuits, and logarithmic signal compression requiring stable component supply across extended temperature ranges.
Supply support for LT1057IS8#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, Inc. (ADI) acquired Linear Technology in 2017 and maintains full technical and manufacturing continuity for legacy Linear op amp families.
The LT1057 product line was designed specifically for high-precision, high-speed analog signal conditioning in industrial instrumentation, medical sensors, and test equipment where JFET input characteristics outperform bipolar alternatives.
FAQ
What is the maximum operating temperature range for the LT1057IS8#PBF?
The LT1057IS8#PBF is rated for operation from –40°C to +85°C ambient temperature. This industrial-grade specification is confirmed in the "PACKAGE/ORDER INFORMATION" section of the official datasheet, where "LT1057I" denotes the industrial temperature grade. The S8 package supports this full range with validated electrical performance including 300 µV max input offset voltage and 98 dB CMRR.
Does the LT1057IS8#PBF have phase reversal protection?
Yes, the LT1057IS8#PBF incorporates proprietary phase reversal protection circuitry. Unlike legacy JFET op amps such as LF412A, it does not invert output polarity when the negative common-mode input voltage drops below –12 V with ±15 V supplies. This feature is explicitly documented in the Applications Information section (page 9) and verified in oscilloscope waveform comparisons included in the datasheet.
What is the input bias current specification for LT1057IS8#PBF at 85°C?
The LT1057IS8#PBF has a maximum input bias current of ±400 pA at TA = 85°C, as specified in the "ELECTRICAL CHARACTERISTICS" table on page 5 under the "LT1057IS8" column and "IB" parameter. This value reflects worst-case warmed-up performance and is critical for high-impedance sensor interface designs where leakage must remain below 1 pA/V.
Is the LT1057IS8#PBF pin-compatible with the LT1057CN8?
No, the LT1057IS8#PBF is not pin-compatible with the LT1057CN8. The datasheet explicitly states: "Please note that the LT1057S8/LT1057IS8 standard surface mount pin-out differs from that of the LT1057 standard CERDIP/PDIP packages." The SOIC-8 (S8) variant uses a different pin mapping than the PDIP-8 (N8) package, requiring PCB layout revision for direct substitution.
What is the guaranteed minimum large-signal voltage gain for LT1057IS8#PBF?
The guaranteed minimum large-signal voltage gain for LT1057IS8#PBF is 70 V/mV (70,000 V/V), specified under VO = ±10 V, RL = 2 kΩ, and TA = –40°C to +85°C conditions. This value appears in the "ELECTRICAL CHARACTERISTICS" table on page 4 under the "LT1057AC" column for "AVOL", and is confirmed for the "I" grade in subsequent tables referencing LT1057IS8.
LT1057IS8#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:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 13V/µs
- Gain Bandwidth Product:
- 5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 7 pA
- Voltage - Input Offset:
- 220 µV
- Current - Supply:
- 1.7mA (x2 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 20 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1057IS8#PBF FAQ
1.How can I place an order for LT1057IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1057IS8#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 LT1057IS8#PBF reliable?
The price and inventory of LT1057IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1057IS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1057IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1057IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1057IS8#PBF?
LT1057IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1057IS8#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 LT1057IS8#PBF?
For technical support, including LT1057IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1057IS8#PBF requirements.
6.How does Aetrix verify that LT1057IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1057IS8#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 LT1057IS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1057IS8#PBF?
All LT1057IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1057IS8#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 LT1057IS8#PBF part is unused and in its original packaging.
Return procedure for LT1057IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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