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Analog Devices Inc. LT1101IN8#PBF
- Part No.:
- LT1101IN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1101IN8#PBF.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,451
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Product details
Overview
LT1101IN8#PBF from Analog Devices (formerly Linear Technology) is a micropower, single-supply 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, enabling high-accuracy bridge transducer amplification in battery-powered industrial sensors.
For engineers reviewing the LT1101IN8#PBF datasheet, LT1101IN8#PBF pinout, LT1101IN8#PBF application, or LT1101IN8#PBF equivalent, key selection criteria include its 1.8V minimum supply voltage, rail-to-rail output swing to ground without pull-down resistors, and guaranteed ±10V output drive into 2kΩ under ±15V supplies - critical for low-power remote temperature sensing and 4–20 mA transmitter designs.
Technical Context
The LT1101IN8#PBF implements a three-op-amp topology with internal resistor networks that eliminate external gain-setting components. Its PNP input stage enables ±36V differential input tolerance and robust input protection, unlike NPN-based competitors limited to ±1.3V before bias current surge.
It operates across dual ±2.2V to ±22V or single 1.8V to 15V supplies, with common-mode input range extending to within millivolts of ground in single-supply mode. CMRR reaches 100 dB min at G = 100 with 1kΩ source imbalance, and improves >30 dB at 60 Hz when an 82 pF capacitor bridges pins 1 and 2 - exclusively in G = 100 configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Options | Fixed G = 10 or G = 100; selected via pin strapping (pins 2–1 and 7–8 shorted for G = 10), no external resistor required |
| Gain Error | 0.04% max at G = 100, RL = 50kΩ - ensures <±4 mV error on 10 V output, critical for precision sensor calibration |
| Supply Current | 105 µA max at TA = 25°C - enables multi-year operation on coin-cell or two Ni-Cad batteries |
| Input Offset Voltage | 160 µV max - contributes <±1.6 mV error at G = 10, directly limiting system-level DC accuracy |
| Min Supply Voltage | 1.8 V guaranteed - supports direct lithium cell (2.7–4.2 V) or depleted Ni-Cad (1.8 V) operation without regulation |
| Output Swing | Within 1 mV of ground (sinking) and to within 600 mV of V+ (sourcing) at G = 10, RL = 2kΩ - eliminates need for external pull-downs |
| CMRR | 100 dB min at G = 100 - rejects >99.999% of 10 V common-mode noise, essential for strain gauge measurements |
Pinout & Package
LT1101IN8#PBF uses an 8-lead plastic DIP (N8) package, 0.300-inch width, with JEDEC MS-001AC outline. Pin 1 is ground/reference (REF), pin 8 is output (OUT), and gain selection is implemented by shorting pins 2→1 and 7→8 for G = 10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Ground / Reference (REF) | Reference node for output common-mode level; tied to system ground in single-supply configurations |
| 2 | Inverting Input (–IN) | Differential input terminal; internally connected to first-stage inverting op-amp input |
| 3 | Noninverting Input (+IN) | Differential input terminal; internally connected to first-stage noninverting op-amp input |
| 4 | V– | Negative supply pin; accepts 0 V (single supply) or negative rail down to –22 V |
| 5 | V+ | Positive supply pin; accepts 1.8 V to +22 V, enabling ultra-low-voltage or high-voltage operation |
| 6 | NC | No connect - internally unused; must remain unconnected per datasheet |
| 7 | NC | No connect - internally unused; must remain unconnected per datasheet |
| 8 | Output (OUT) | Amplified differential output; drives ≥2 kΩ load to ±10 V with <0.04% gain error |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 75 µA typical supply current - extends battery life in portable data loggers and wireless sensor nodes |
| Single-supply capability | Operates from 1.8 V with inputs and outputs swinging to within 1 mV of ground - eliminates dual-rail power design complexity |
| Fixed-gain architecture | G = 10 or G = 100 set by pin strapping only - removes gain-setting resistor tolerance and layout sensitivity |
| Robust input protection | ±36 V differential input rating with PNP inputs - withstands transient overloads in industrial field wiring without damage |
| Low 0.1–10 Hz noise | 0.9 µVp-p typical - minimizes drift-induced errors in slow-sampling thermocouple and strain gauge systems |
Applications
| Remote Temperature Sensing | 4–20 mA Loop Receiver |
|---|---|
|
Use Scenario: Amplifying µV-level signals from a remote LM134-3 current-source temperature sensor across long cables with high common-mode noise. IC Role / Device Role / Timing Role: Precision differential amplifier conditioning the sensor's 10 mV/°C output while rejecting cable-induced CM noise. Use Value: Delivers ±0.5°C accuracy over 2.5–150°C range using single 3 V supply, with no external gain resistor or offset null circuitry required. |
Use Scenario: Converting 4–20 mA loop current to 0–10 V analog signal in PLC I/O modules with galvanically isolated front ends. IC Role / Device Role / Timing Role: High-CMRR instrumentation amplifier converting shunt voltage with minimal error contribution from supply ripple. Use Value: Maintains 100 dB CMRR at 60 Hz (enhanced to >130 dB with 82 pF cap), ensuring stable output despite noisy AC mains coupling. |
| Low-Voltage Strain Gauge Bridge | Portable Battery-Powered Data Logger |
|
Use Scenario: Amplifying microvolt outputs from a quarter-bridge strain gauge powered by a single 1.8 V lithium cell in structural health monitoring. IC Role / Device Role / Timing Role: Micropower signal conditioner providing fixed G = 100 gain with rail-to-rail output swing near ground. Use Value: Enables full-scale bridge excitation at 20 mV minimum, achieving usable SNR without boost converters or LDOs. |
Use Scenario: Signal conditioning stage in handheld environmental sensor (thermistor, humidity, pressure) with multi-year battery life target. IC Role / Device Role / Timing Role: Low-drift, low-noise front-end amplifier digitized by a 16-bit SAR ADC. Use Value: 0.4 µV/°C offset drift and 8 ppm gain nonlinearity preserve measurement integrity across temperature cycling without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD620ARZ | Higher supply current (1.3 mA typ), requires external gain resistor (G = 1–1000), no 1.8 V operation | Designed for higher-speed, higher-precision lab equipment; not suitable for micropower or single-cell battery use | Select AD620ARZ only when bandwidth >1 MHz or gain flexibility >1000 is required; avoid for battery-constrained designs. |
| LTC6915CMS8#PBF | Digital gain control (SPI), 125 µA supply current, G = 1–128, but no sub-2 V operation or rail-to-ground output | Targeted at programmable gain stages in automated test equipment, not fixed-gain sensor interfaces | Choose LTC6915CMS8#PBF when dynamic gain adjustment is needed; LT1101IN8#PBF remains superior for static, ultra-low-power deployments. |
Compared with AD620ARZ and LTC6915CMS8#PBF, the LT1101IN8#PBF uniquely combines micropower operation (<105 µA), true single-supply functionality down to 1.8 V, and guaranteed rail-to-ground output sinking - making it irreplaceable in energy-harvested and long-life battery sensor nodes where external components and supply headroom are constrained.
Availability
LT1101IN8#PBF is available at Aetrix Electronics and suitable for remote temperature sensing, 4–20 mA loop receivers, low-voltage strain gauge bridges, portable battery-powered data loggers, and industrial sensor signal conditioning requiring stable component supply and long-term obsolescence support.
Supply support for LT1101IN8#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LT1101IN8#PBF belongs to Linear Technology's legacy precision instrumentation amplifier family, engineered specifically for micropower, single-supply sensor interface applications in harsh industrial and remote environments.
FAQ
What is the minimum operating supply voltage for the LT1101IN8#PBF?
The LT1101IN8#PBF is guaranteed to operate down to 1.8 V supply voltage, verified across temperature and process corners. At this voltage, gain accuracy degrades minimally - maintaining 0.04% max gain error and functional output swing - enabling direct use with aging Ni-Cad cells or low-voltage lithium chemistries without regulation.
How do I configure the LT1101IN8#PBF for G = 10 versus G = 100?
To configure the LT1101IN8#PBF for G = 10, short pin 2 to pin 1 (REF) and pin 7 to pin 8 (OUT). For G = 100, leave pins 2 and 7 unconnected (NC); the device defaults to G = 100. No external resistors or solder jumpers beyond these two shorts are required - the gain network is fully internal.
Does the LT1101IN8#PBF require external offset nulling circuitry?
No, the LT1101IN8#PBF does not include dedicated offset null pins and is not intended for external trimming. Its 160 µV max input offset voltage and 0.4 µV/°C drift are sufficiently low for most bridge and thermocouple applications; system-level calibration (e.g., bridge zero-adjust) inherently compensates for LT1101IN8#PBF offset without added components.
Can the LT1101IN8#PBF drive a 2 kΩ load to ±10 V?
Yes - the LT1101IN8#PBF guarantees ±10 V output swing into a 2 kΩ load when operated from ±15 V supplies, with ≤0.04% gain error. This capability is explicitly characterized in the datasheet and validated across temperature, making it suitable for driving ADC reference buffers or analog output stages without additional buffering.
What is the purpose of the 82 pF capacitor between pins 1 and 2 on the LT1101IN8#PBF?
The 82 pF capacitor between pins 1 (REF) and 2 (–IN) enhances CMRR by >30 dB at 60 Hz - but only when the LT1101IN8#PBF is configured for G = 100. It compensates for internal phase mismatch in the input stage, significantly improving rejection of mains-borne interference in industrial sensor installations without affecting DC performance or stability.
LT1101IN8#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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1101IN8#PBF FAQ
1.How can I place an order for LT1101IN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1101IN8#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 LT1101IN8#PBF reliable?
The price and inventory of LT1101IN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1101IN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1101IN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1101IN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1101IN8#PBF?
LT1101IN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1101IN8#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 LT1101IN8#PBF?
For technical support, including LT1101IN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1101IN8#PBF requirements.
6.How does Aetrix verify that LT1101IN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1101IN8#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 LT1101IN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1101IN8#PBF?
All LT1101IN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1101IN8#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 LT1101IN8#PBF part is unused and in its original packaging.
Return procedure for LT1101IN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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