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Analog Devices Inc. LT1101CN8#PBF
- Part No.:
- LT1101CN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1101CN8#PBF.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,854
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Product details
Overview
LT1101CN8#PBF from Analog Devices (formerly Linear Technology) is a precision micropower instrumentation amplifier with fixed gains of 10 or 100 in an 8-lead PDIP package. It delivers 0.04% max gain error, 0.0008% (8 ppm) max gain nonlinearity, and 4 ppm/°C max gain drift, operating from single 1.8V supplies or dual ±15V rails. It is widely used in battery-powered bridge transducer interfaces for strain gauges and thermocouples.
For engineers reviewing the LT1101CN8#PBF datasheet, LT1101CN8#PBF pinout, LT1101CN8#PBF application, or LT1101CN8#PBF equivalent, key selection criteria include guaranteed rail-to-rail input/output swing on single supply, no external gain-setting resistor required, micropower operation (105 µA max supply current), and built-in common-mode rejection enhancement via optional 82 pF capacitor between pins 1 and 2.
Technical Context
The LT1101CN8#PBF implements a three-op-amp instrumentation topology with PNP input stages enabling ±36 V differential input tolerance and robust input protection. Its fixed-gain architecture eliminates external resistor matching errors and reduces PCB area versus programmable alternatives.
It supports both single-supply (e.g., 5 V/0 V) and dual-supply (±15 V) operation, with input common mode range extending to within millivolts of ground and output sinking capability to ground-eliminating need for pull-down resistors. CMRR exceeds 100 dB at G = 100 with 1 kΩ source imbalance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Options | Fixed G = 10 or G = 100; selected by shorting pins (no external resistor needed) |
| Gain Error | 0.04% max ensures high-accuracy signal scaling without calibration |
| Input Offset Voltage | 160 µV max enables precise DC-coupled sensor measurements |
| Supply Current | 105 µA max allows multi-year operation on coin-cell batteries |
| Min Supply Voltage | 1.8 V enables use with single lithium or two Ni-Cd cells |
| CMRR (G=100) | 100 dB min rejects interference in noisy industrial environments |
| 0.1–10 Hz Noise | 0.9 µVp-p typ supports low-frequency precision sensing (e.g., thermocouples) |
Pinout & Package
Package: 8-lead plastic DIP (N8), 0.300-inch width, through-hole mounting, RoHS-compliant #PBF finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Reference (REF) | Ground reference node for output common-mode level; sets output center point |
| 2 | Inverting Input (–IN) | Differential input terminal; accepts negative leg of bridge or sensor |
| 3 | Noninverting Input (+IN) | Differential input terminal; accepts positive leg of bridge or sensor |
| 4 | V– | Negative supply pin; tied to 0 V in single-supply configurations |
| 5 | NC | No connection; internally unused |
| 6 | V+ | Positive supply pin; supports 1.8 V to ±22 V operation |
| 7 | NC | No connection; internally unused |
| 8 | Output (OUT) | Amplified differential output; sinks current to ground in single-supply mode |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation down to 1.8 V | Enables direct interface with low-voltage microcontrollers and battery-powered IoT sensors |
| Rail-to-rail input and output swing | Maximizes dynamic range on 5 V or 3.3 V systems without level-shifting circuitry |
| No external gain-setting resistor required | Reduces BOM count, layout area, and resistor-matching sensitivity in production |
| 82 pF capacitor-enhanced CMRR | Adds >30 dB CMRR improvement at 60 Hz when placed between pins 1 and 2 (G = 100 only) |
| PNP input stage with ±36 V differential tolerance | Withstands transient overloads common in industrial field wiring without damage or bias shift |
Applications
| Strain Gauge Bridge Amplifier | Thermocouple Signal Conditioning |
|---|---|
Use Scenario: Amplifying mV-level differential output from a 350 Ω Wheatstone bridge under mechanical load. IC Role / Device Role / Timing Role: Precision instrumentation amplifier with fixed G = 100, referenced to local ground. Use Value: Delivers 0.04% gain accuracy and 0.9 µVp-p low-frequency noise for sub-0.1% strain resolution. | Use Scenario: Cold-junction-compensated amplification of Type K thermocouple output (≈41 µV/°C). IC Role / Device Role / Timing Role: Micropower front-end amplifier with single 3.3 V supply and rail-to-rail output swing. Use Value: 105 µA supply current enables multi-year battery life; 160 µV offset supports ±0.5°C measurement accuracy. |
| 4–20 mA Loop Receiver | Remote Temperature Sensor Node |
Use Scenario: Converting loop current (4–20 mA) to calibrated voltage (0–5 V) across precision shunt resistor. IC Role / Device Role / Timing Role: Fixed-gain (G = 10) differential amplifier rejecting common-mode noise on long cables. Use Value: 100 dB CMRR suppresses induced 50/60 Hz interference; 4 ppm/°C gain drift maintains calibration stability. | Use Scenario: Battery-powered temperature node using LM134 current source and 10 kΩ NTC thermistor. IC Role / Device Role / Timing Role: Low-drift, low-noise amplifier driving ADC input with minimal power overhead. Use Value: 0.4 µV/°C offset drift and 1.8 V minimum supply enable accurate readings across –40°C to +85°C with 10-year shelf life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD620ARZ | Gain set by external resistor (not fixed); higher supply current (1.3 mA); wider gain range (1–1000) | Requires precision resistor and layout care; less suitable for ultra-low-power or space-constrained designs | Select when variable gain or higher bandwidth (>1 MHz) is required; not drop-in for LT1101CN8#PBF |
| INA126PA | Fixed G = 10 or 100; 170 µA supply current; 250 µV max offset; SO-8 package only | Higher power consumption; surface-mount only; lacks 1.8 V operation and PNP input ruggedness | Choose for modern SMT assembly where PDIP is unacceptable; verify 1.8 V compatibility if battery voltage drops below 2.3 V |
Compared with AD620ARZ and INA126PA, the LT1101CN8#PBF uniquely combines micropower operation (105 µA), true 1.8 V single-supply functionality, and through-hole PDIP packaging-making it irreplaceable in legacy industrial sensors and ultra-long-life battery applications where external resistors or higher quiescent current are disqualifying.
Availability
LT1101CN8#PBF is available at Aetrix Electronics and suitable for strain gauge amplifiers, thermocouple interfaces, and 4–20 mA loop receivers requiring stable component supply across extended product lifecycles.
Supply support for LT1101CN8#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 legacy Linear precision analog products.
The LT1101 belongs to Linear's pioneering micropower instrumentation amplifier family, designed specifically for battery-operated sensor signal conditioning where zero external components, rail-to-rail operation, and extreme gain accuracy are mandatory.
FAQ
What are the pin configuration and gain selection method for the LT1101CN8#PBF?
The LT1101CN8#PBF uses an 8-pin PDIP package with fixed gain selection: G = 100 requires no pin connections beyond standard V+, V–, REF (pin 1), –IN (pin 2), +IN (pin 3), and OUT (pin 8); G = 10 requires shorting pin 2 to pin 1 and pin 7 to pin 8. Pin 5 and pin 7 are NC. This eliminates external gain resistors and associated matching errors inherent in the LT1101CN8#PBF design.
Does the LT1101CN8#PBF support true single-supply operation down to 1.8 V?
Yes, the LT1101CN8#PBF is fully specified for single-supply operation from 1.8 V (V+ = 1.8 V, V– = 0 V), maintaining 0.04% gain error and rail-to-rail input/output swing. Its PNP input stage and output sink capability allow inputs and outputs to operate within millivolts of ground-enabling direct interfacing with low-voltage microcontrollers without level-shifting circuitry in the LT1101CN8#PBF application.
How does the LT1101CN8#PBF achieve enhanced CMRR at 60 Hz?
The LT1101CN8#PBF achieves >30 dB improvement in CMRR at 60 Hz by adding an 82 pF capacitor between pin 1 (REF) and pin 2 (–IN), but only when configured for G = 100. This passive network compensates for internal phase mismatch, raising CMRR from 100 dB to >130 dB at line frequency-critical for industrial sensor nodes operating near AC mains in the LT1101CN8#PBF implementation.
What is the maximum differential input voltage the LT1101CN8#PBF can withstand?
The LT1101CN8#PBF tolerates up to ±36 V differential input voltage (with ±18 V supplies) due to its rugged PNP input transistors-far exceeding the ±1.3 V limit of NPN-input competitors. When inputs exceed the supply rails, internal clamping diodes limit current; damage is prevented if input current is restricted to ≤20 mA, making the LT1101CN8#PBF suitable for harsh industrial field environments.
Can the LT1101CN8#PBF drive a 2 kΩ load to ±10 V with full accuracy?
Yes, the LT1101CN8#PBF guarantees ±10 V output swing into a 2 kΩ load while maintaining its specified 0.04% gain error and 8 ppm gain nonlinearity. This performance is validated across the full operating temperature range (0°C to 70°C for the 'C' grade) and supports precision applications such as data acquisition front-ends where loading effects must not degrade measurement fidelity in the LT1101CN8#PBF system.
LT1101CN8#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:
- 0.1V/µs
- Gain Bandwidth Product:
- 37 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 6 nA
- Voltage - Input Offset:
- 60 µV
- Current - Supply:
- 94µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.2 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1101CN8#PBF FAQ
1.How can I place an order for LT1101CN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1101CN8#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 LT1101CN8#PBF reliable?
The price and inventory of LT1101CN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1101CN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1101CN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1101CN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1101CN8#PBF?
LT1101CN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1101CN8#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 LT1101CN8#PBF?
For technical support, including LT1101CN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1101CN8#PBF requirements.
6.How does Aetrix verify that LT1101CN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1101CN8#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 LT1101CN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1101CN8#PBF?
All LT1101CN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1101CN8#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 LT1101CN8#PBF part is unused and in its original packaging.
Return procedure for LT1101CN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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