My Inquiry
My Account
Analog Devices Inc. LT1102IN8#PBF
- Part No.:
- LT1102IN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1102IN8#PBF.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,599
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LT1102IN8#PBF from Analog Devices (acquired Linear Technology) is a high-speed, precision JFET-input instrumentation amplifier in 8-lead PDIP package with fixed gains of 10 or 100, 30V/μs slew rate, 35MHz gain-bandwidth product, and 3μs 0.01% settling time. It delivers ±150mA output current and is used in multiplexed data acquisition systems requiring fast, low-error amplification of high-impedance bridge and photodetector signals.
For engineers reviewing the LT1102IN8#PBF datasheet, LT1102IN8#PBF pinout, LT1102IN8#PBF application, or LT1102IN8#PBF equivalent, key selection criteria include guaranteed 0.05% max gain error at 25°C, 40pA max input bias current at 70°C, ±20V supply range, and validated performance in G=10/G=100 configurations without external gain-setting resistors.
Technical Context
The LT1102IN8#PBF uses a two-op-amp architecture where the second stage is decompensated for G=10 stability, enabling high slew rate and bandwidth. Its FET input structure provides >10¹²Ω common-mode input resistance and eliminates doubling of input bias current with temperature rise.
Common-mode rejection is optimized at G=10 via matched op-amp bandwidths; at G=100, an 18pF capacitor between pins 1 and 2 improves CMRR by 10× from 200Hz to 30kHz. Input protection allows ±40V differential voltage with ±20V supplies and clamps safely outside supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Slew Rate | 30V/μs at G=10 - enables clean amplification of fast transient signals up to ~3MHz without slewing distortion. |
| Gain-Bandwidth Product | 35MHz - supports stable closed-loop operation at G=10 with usable bandwidth beyond 3MHz. |
| Settling Time (0.01%) | 3μs at G=10 - ensures accurate digitization in 16-bit+ data acquisition systems with <100kSPS throughput. |
| Input Bias Current | 40pA max at 70°C - preserves signal integrity from sensors with >100MΩ source impedance (e.g., piezoresistive bridges). |
| Gain Error | 0.05% max at 25°C - reduces calibration burden in precision measurement systems requiring <0.1% total system gain uncertainty. |
| Supply Voltage Range | ±20V - accommodates industrial sensor interfaces operating across wide analog input ranges without level-shifting. |
| Output Short-Circuit Duration | Indefinite - allows robust operation in test equipment and sensor excitation circuits subject to accidental shorts. |
Pinout & Package
LT1102IN8#PBF is housed in an 8-lead plastic dual in-line package (PDIP), N8 package variant, with 0.300-inch body width and through-hole mounting compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (–IN) | Differential input node; referenced to internal summing junction; requires matched layout for optimal CMRR. |
| 2 | Non-inverting Input (+IN) | Differential input node; high-impedance JFET input (≥10¹²Ω); sensitive to PCB leakage and guarding. |
| 3 | Reference Input (REF) | DC bias level setting for output common-mode voltage; tied to ground or system reference for single-ended output. |
| 4 | Negative Supply (V–) | Connects to negative rail (e.g., –15V); case-connected in H-package but isolated in N8; decoupling required within 1cm. |
| 5 | Output (OUT) | Amplified, buffered output capable of ±150mA drive into 75Ω loads; requires local 0.1μF ceramic bypass. |
| 6 | Positive Supply (V+) | Connects to positive rail (e.g., +15V); shares thermal path with output stage; separate decoupling from V– recommended. |
| 7 | Gain Select (G=100) | Internally connected to set G=100; open-circuit or floating configures G=10; no external resistor needed. |
| 8 | NC (No Connect) | Not internally bonded; must remain unconnected per datasheet to avoid parasitic coupling or latch-up risk. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed G=10/G=100 architecture | Eliminates external gain-setting resistor tolerance errors and board space; guarantees 0.01% typical gain accuracy. |
| FET input stage | Delivers 40pA max input bias current at 70°C - avoids drift-induced errors in high-resistance sensor interfaces. |
| Indefinite output short-circuit rating | Enables use in sensor excitation and test fixtures without external current-limiting circuitry or thermal shutdown concerns. |
| 18pF pin-1-to-pin-2 compensation | Restores CMRR >80dB from 200Hz–30kHz at G=100, critical for AC-coupled bridge measurements with narrowband filtering. |
| ±40V differential input rating | Withstands overvoltage transients in industrial field wiring without clamp diode conduction or damage - exceeds typical ±13V limits of bipolar-input competitors. |
Applications
| Bridge Amplifier | Multiplexed Data Acquisition |
|---|---|
Use Scenario: Amplifying mV-level outputs from full Wheatstone bridges in load cells and pressure sensors with <1Hz lowpass filtering. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing fixed G=100 gain, rejecting common-mode noise from long sensor cables while maintaining DC accuracy. Use Value: Achieves <0.05% gain error and 3ppm nonlinearity, reducing system calibration frequency and enabling 18-bit effective resolution. | Use Scenario: High-speed switching between 4+ differential sensor channels in automated test equipment with 800kHz multiplexing capability. IC Role / Device Role / Timing Role: Fast-settling (3μs to 0.01%) front-end amplifier driving ADC inputs after channel selection, minimizing inter-channel crosstalk. Use Value: Enables >300kSPS aggregate sampling across multiple channels without settling-related gain error accumulation. |
| Photodetector Interface | High-Impedance Capacitive Sensor |
Use Scenario: Conditioning weak current outputs from photodiodes and phototransistors in optical encoders and spectrometers. IC Role / Device Role / Timing Role: Low-input-bias-current (40pA) amplifier converting photocurrent to voltage with minimal dark-current offset contribution. Use Value: Maintains sub-picoamp sensitivity and 2μV/°C offset drift, preserving dynamic range in ambient-temperature-varying environments. | Use Scenario: Reading capacitance shifts in MEMS accelerometers and humidity sensors using charge-transfer or oscillator-based readout. IC Role / Device Role / Timing Role: High-input-impedance (≥10¹²Ω) buffer isolating capacitive sensing elements from downstream signal chain loading. Use Value: Prevents RC time constant degradation and phase shift, ensuring accurate timing alignment in resonant sensor interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8429ARZ | Higher 5.5nV/√Hz input voltage noise (vs. 19nV/√Hz typ), 2.5MHz GBW, 20V/μs slew rate; requires external gain resistors for G≠100. | Better noise performance below 100Hz but slower settling (7.5μs to 0.01%); suited for ultra-low-noise DC-coupled applications, not high-speed multiplexing. | Select AD8429ARZ when sub-10nV/√Hz noise dominates design requirements and speed is secondary. |
| INA128UA | Lower 1.5V/μs slew rate, 120kHz BW at G=100, 100pA input bias current; fixed G=10/100/1000, no pin-1-to-pin-2 compensation option. | Optimized for battery-powered portable instruments; lacks 30V/μs speed and 150mA drive needed for 75Ω video or RF test loads. | Select INA128UA for cost-sensitive, low-power applications where 120kHz bandwidth suffices and output drive <10mA. |
Compared with LT1102IN8#PBF, AD8429ARZ trades speed and drive strength for lower broadband noise, while INA128UA sacrifices bandwidth and output current for lower quiescent power and cost - neither matches the LT1102IN8#PBF's combination of 30V/μs slew rate, 150mA output, and 40pA bias current in a resistorless fixed-gain package.
Availability
LT1102IN8#PBF is available at Aetrix Electronics and suitable for industrial sensor conditioning, automated test equipment, and precision data acquisition systems requiring stable component supply across extended temperature ranges (–40°C to 85°C).
Supply support for LT1102IN8#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) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets since 1965.
The LT1102IN8#PBF belongs to Linear Technology's legacy precision instrumentation amplifier product line, designed specifically for high-speed, low-drift amplification of weak signals from bridges, photodetectors, and capacitive sensors in harsh industrial environments.
FAQ
What is the maximum operating temperature range for the LT1102IN8#PBF?
The LT1102IN8#PBF is rated for operation from –40°C to +85°C (I-grade). This extended industrial temperature range ensures reliable performance in factory automation, motor control feedback, and outdoor instrumentation where ambient temperatures fluctuate widely. The device maintains specified gain error (0.05% max), input bias current (40pA max), and settling time (3μs to 0.01%) across this full range, as verified in the LT1102 datasheet Section 1.
Does the LT1102IN8#PBF require external components to configure gain?
No, the LT1102IN8#PBF does not require external gain-setting resistors. It offers factory-trimmed fixed gains of 10 or 100: G=10 is the default configuration when pin 7 is left open; G=100 is selected by connecting pin 7 to V– (pin 4). This resistorless architecture eliminates resistor tolerance errors and PCB layout sensitivity, delivering 0.01% typical gain accuracy as confirmed in the LT1102 Electrical Characteristics table on page 3 of the datasheet.
Can the LT1102IN8#PBF drive a 75Ω video load at 330kHz?
Yes, the LT1102IN8#PBF can drive a 75Ω load to ±10V at 330kHz with G=10, as explicitly demonstrated in the Typical Application diagram TA01 on page 1 of the datasheet. Its ±150mA output current capability and 30V/μs slew rate prevent slew-induced distortion at this frequency and load, making it suitable for analog video signal conditioning and high-speed test equipment interfaces.
How does the LT1102IN8#PBF handle input overvoltage conditions?
The LT1102IN8#PBF withstands ±40V differential input voltage (with ±20V supplies) and clamps safely when inputs exceed the supply rails, thanks to its JFET input stage. Unlike bipolar-input amplifiers that conduct milliampere currents above ±13V, the LT1102IN8#PBF draws only microamps during overvoltage events, preventing damage if input current is limited to 20mA - a key reliability feature for industrial sensor interfaces exposed to ESD and field-wiring faults.
Is pin 8 of the LT1102IN8#PBF functional or should it be left unconnected?
Pin 8 of the LT1102IN8#PBF is designated NC (No Connect) and must remain unconnected. It is not internally bonded and serves no electrical function. Connecting pin 8 to any potential - including ground, supply, or signal traces - risks introducing parasitic coupling, degrading CMRR, or causing unpredictable behavior, as stated in the "Basic Connections" section (page 10) and Package Description (page 12) of the LT1102 datasheet.
LT1102IN8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 30V/µs
- Gain Bandwidth Product:
- 3.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 4 pA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 3.4mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 18 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1102IN8#PBF FAQ
1.How can I place an order for LT1102IN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1102IN8#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 LT1102IN8#PBF reliable?
The price and inventory of LT1102IN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1102IN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1102IN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1102IN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1102IN8#PBF?
LT1102IN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1102IN8#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 LT1102IN8#PBF?
For technical support, including LT1102IN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1102IN8#PBF requirements.
6.How does Aetrix verify that LT1102IN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1102IN8#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 LT1102IN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1102IN8#PBF?
All LT1102IN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1102IN8#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 LT1102IN8#PBF part is unused and in its original packaging.
Return procedure for LT1102IN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1102IN8#PBF Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
