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Analog Devices Inc. LT1057S8#TRPBF
- Part No.:
- LT1057S8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1057S8#TRPBF.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:851
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Product details
Overview
LT1057S8#TRPBF from Analog Devices (acquired Linear Technology) is a dual JFET-input precision operational amplifier in an 8-lead SOIC package, delivering 14 V/µs slew rate, 5 MHz gain-bandwidth product, and 250 µV max input offset voltage at 25°C. It operates from ±15 V supplies, supports ±12 V output swing into 2 kΩ, and targets high-speed precision signal conditioning in instrumentation and data acquisition systems.
For engineers reviewing the LT1057S8#TRPBF datasheet, LT1057S8#TRPBF pinout, LT1057S8#TRPBF application, or LT1057S8#TRPBF equivalent, key selection criteria include its picoampere-level bias current (±50 pA at 70°C), low 13 nV/√Hz input noise density at 1 kHz, and guaranteed fast settling to 0.02% in 1.3 µs - critical for sample-and-hold and photodiode amplifier designs.
Technical Context
The LT1057S8#TRPBF uses matched JFET input stages to achieve ultra-low input bias current and high input impedance (>10¹² Ω differential), enabling accurate amplification of high-impedance sources like photodiodes and piezoelectric sensors. Its internal compensation ensures stable unity-gain operation without external components.
Unlike standard bipolar op amps, it incorporates phase reversal protection to prevent output inversion when common-mode inputs exceed –12 V (with ±15 V supplies), eliminating servo lock-up risks in closed-loop systems. The S8 package features a standardized SOIC pinout distinct from PDIP/CERDIP variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 14 V/µs - enables clean amplification of fast transients up to ~1 MHz without slewing distortion |
| Gain-Bandwidth Product | 5 MHz - supports stable closed-loop gains up to 50 at 100 kHz |
| Input Offset Voltage (max) | 250 µV at 25°C - ensures ≤0.0025% error in 10 V full-scale precision measurement circuits |
| Input Bias Current (max) | ±50 pA at TA = 70°C - preserves signal integrity in >1 GΩ source impedance applications |
| Input Noise Density | 13 nV/√Hz at 1 kHz - contributes <1.3 µV RMS noise in 10 kHz bandwidth, critical for low-level analog front-ends |
| Common-Mode Rejection | 98 dB - rejects >99.9% of 1 V common-mode interference on differential sensor outputs |
| Supply Current per Amp | 2.8 mA - balances speed and power efficiency for dual-channel portable instrumentation |
Pinout & Package
LT1057S8#TRPBF is housed in an 8-lead plastic SOIC (S8) package with 1.27 mm lead pitch, JEDEC MS-012AC compliant, and rated for 0°C to 70°C operation. Pin 1 is marked by a bevel edge or dimple.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Amplifier A output - drives loads up to ±12 V into 2 kΩ; requires local decoupling for stability |
| 2 | Inverting Input A (–IN A) | High-impedance node - guard ring routing essential to maintain picoampere bias performance |
| 3 | Non-inverting Input A (+IN A) | High-impedance node - matches –IN A in offset and drift; symmetric PCB layout required |
| 4 | V– (Negative Supply) | Ground reference for negative rail - must be low-impedance path to minimize PSRR degradation |
| 5 | V+ (Positive Supply) | Power rail input - bypass with 0.1 µF ceramic capacitor near pin to suppress high-frequency noise |
| 6 | Output B | Amplifier B output - electrically isolated from Output A; supports independent feedback networks |
| 7 | Inverting Input B (–IN B) | Second high-impedance input - shares same process-matched characteristics as –IN A |
| 8 | Non-inverting Input B (+IN B) | Second high-impedance input - enables dual-channel synchronous signal processing |
Key Features
| Feature | Design Value |
|---|---|
| Phase reversal protection | Prevents output inversion when common-mode input drops below –12 V, eliminating servo system lock-up |
| Matched dual architecture | Guarantees <1 µV inter-amplifier offset mismatch - enables precise differential gain and chopperless auto-zero topologies |
| Low 1/f noise corner | 28 Hz - ensures minimal drift in DC-coupled integrators and logarithmic amplifiers over time |
| High channel separation | 130 dB at DC - prevents crosstalk between channels in dual-sensor readout systems |
| Robust capacitive load drive | Stable with ≥100 pF load - simplifies connection to ADC input buffers and long PCB traces without isolation resistors |
Applications
| Photodiode Amplifier | Precision Sample-and-Hold |
|---|---|
|
Use Scenario: Amplifying weak current from a PIN photodiode in optical power meters or spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1 GΩ feedback resistor, leveraging ultra-low input bias current and 13 nV/√Hz noise density. Use Value: Enables detection of sub-nA photocurrents with <1 µV RMS noise floor in 10 kHz bandwidth, directly supporting 16-bit dynamic range. |
Use Scenario: Holding analog sensor outputs during ADC conversion cycles in industrial PLC modules. IC Role / Device Role / Timing Role: Fast-settling buffer (1.3 µs to 0.02%) driving the hold capacitor, minimizing droop and aperture uncertainty. Use Value: Reduces sampling error to <0.001% for 12-bit systems operating at 100 kSPS, eliminating need for external guard drivers. |
| Logarithmic Converter | Instrumentation Amplifier Front-End |
|
Use Scenario: Converting wide-dynamic-range photodiode currents (100 nA to 100 µA) into linear voltage outputs for fiber optic receivers. IC Role / Device Role / Timing Role: Core op amp in diode-connected feedback configuration, exploiting matched dual topology for temperature-stable log slope. Use Value: Achieves 100 dB input range with <0.1% nonlinearity using single LT1057S8#TRPBF, avoiding multi-op-amp discrete solutions. |
Use Scenario: Conditioning low-level bridge sensor outputs (e.g., strain gauges) in weigh scales and pressure transducers. IC Role / Device Role / Timing Role: First-stage gain amplifier with 10¹² Ω input impedance, rejecting common-mode noise before programmable gain stage. Use Value: Delivers 120 dB CMRR at 60 Hz while preserving microvolt-level resolution, reducing need for expensive shielded cabling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual JFET-input precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1881IS8#TRPBF | Rail-to-rail output, 50 µV max VOS, 200 pA max IB, but only 1.5 MHz GBW and 0.6 V/µs slew rate | Better DC accuracy and lower power (135 µA per amp), but insufficient speed for >100 kHz settling-critical apps | Select LT1881IS8#TRPBF only when ultra-low offset and rail-to-rail swing outweigh bandwidth needs |
| OPA2134UA | 10 MHz GBW, 20 V/µs slew rate, 500 µV max VOS, 10 pA max IB at 25°C (but degrades to ±200 pA at 70°C) | Higher speed and lower room-temp IB, but wider VOS distribution and no phase reversal protection | Choose OPA2134UA for higher bandwidth where phase reversal risk is mitigated externally |
Compared with LT1881IS8#TRPBF and OPA2134UA, the LT1057S8#TRPBF uniquely balances 5 MHz bandwidth, 14 V/µs slew rate, and guaranteed ±50 pA bias current at 70°C - making it optimal for dual-channel, medium-speed, high-impedance signal chains where both speed and leakage control are non-negotiable.
Availability
LT1057S8#TRPBF is available at Aetrix Electronics and suitable for precision instrumentation, photodiode signal conditioning, and fast sample-and-hold circuits requiring stable component supply across industrial and test equipment production lifecycles.
Supply support for LT1057S8#TRPBF 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) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LT1057S8#TRPBF belongs to Linear Technology's legacy precision op amp family, engineered specifically for applications demanding simultaneous high speed, ultra-low input current, and microvolt-level DC accuracy - such as optical sensing and precision data acquisition.
FAQ
What is the maximum operating temperature range for the LT1057S8#TRPBF?
The LT1057S8#TRPBF is specified for 0°C to 70°C ambient operation. This commercial-grade temperature range is clearly defined in the "PACKAGE/ORDER INFORMATION" section of the datasheet and applies to all S8-package variants including LT1057S8#TRPBF. Operation outside this range may result in parametric violations, especially in input offset voltage drift and bias current.
Does the LT1057S8#TRPBF have phase reversal protection?
Yes, the LT1057S8#TRPBF includes built-in phase reversal protection, a key differentiator versus legacy JFET op amps like LF412A. When the common-mode input voltage drops below –12 V (with ±15 V supplies), the LT1057S8#TRPBF maintains correct polarity at the output - preventing servo lock-up and system instability. This feature is explicitly documented in the Applications Information section.
What is the typical input noise voltage density of the LT1057S8#TRPBF at 1 kHz?
The LT1057S8#TRPBF has a typical input noise voltage density of 13 nV/√Hz at 1 kHz, as confirmed in the Electrical Characteristics table under "en Input Noise Voltage Density". This value is measured with VS = ±15 V and TA = 25°C, and remains consistent across S8-package variants. It directly impacts signal-to-noise ratio in low-level amplification stages.
Can the LT1057S8#TRPBF drive capacitive loads without oscillation?
Yes, the LT1057S8#TRPBF is characterized for stable operation with ≥100 pF capacitive loads, as shown in the "Capacitive Load Handling" typical performance curve (Figure G15). Its internal compensation allows direct driving of ADC input capacitors or long PCB traces without series isolation resistors - a design advantage over many uncompensated precision op amps.
How does the LT1057S8#TRPBF compare to the LT1057CN8 in terms of pin compatibility?
The LT1057S8#TRPBF and LT1057CN8 share identical pin functions but differ in physical pinout orientation: the S8 (SOIC) package uses a standard 8-lead narrow SO footprint with Pin 1 at bottom-left, whereas the N8 (PDIP) places Pin 1 at top-left. Their electrical behavior is identical, but PCB layout must follow respective JEDEC outlines - they are not drop-in replacements without board revision.
LT1057S8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1057S8#TRPBF FAQ
1.How can I place an order for LT1057S8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1057S8#TRPBF 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 LT1057S8#TRPBF reliable?
The price and inventory of LT1057S8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1057S8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1057S8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1057S8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1057S8#TRPBF?
LT1057S8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1057S8#TRPBF 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 LT1057S8#TRPBF?
For technical support, including LT1057S8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1057S8#TRPBF requirements.
6.How does Aetrix verify that LT1057S8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1057S8#TRPBF 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 LT1057S8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1057S8#TRPBF?
All LT1057S8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1057S8#TRPBF, 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 LT1057S8#TRPBF part is unused and in its original packaging.
Return procedure for LT1057S8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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