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Analog Devices Inc. LT1101SW#PBF
- Part No.:
- LT1101SW#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
LT1101SW#PBF.pdf
- Description:
- IC INST AMP 1 CIRCUIT 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:193
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Product details
Overview
LT1101SW#PBF from Analog Devices (acquired Linear Technology) is a precision micropower instrumentation amplifier with fixed gains of 10 or 100, designed for single-supply operation down to 1.8V. It delivers 0.04% max gain error, 0.0008% (8ppm) max gain nonlinearity, and 4ppm/°C max gain drift, enabling high-accuracy bridge transducer amplification in battery-powered sensor systems.
For engineers reviewing the LT1101SW#PBF datasheet, LT1101SW#PBF pinout, LT1101SW#PBF application, or LT1101SW#PBF equivalent, this page provides verified pin configuration, real-world single-supply performance boundaries, gain-select wiring methods, and validated alternatives for low-power precision signal conditioning.
Technical Context
The LT1101SW#PBF implements a three-op-amp topology with internal 90R/9R resistor network enabling fixed G = 10 or G = 100 without external components. Its PNP input stage allows ±36V differential input voltage tolerance and rail-to-rail common-mode range near ground on single supply.
It operates from ±22V dual supplies or 1.8V to 15V single supply, with output guaranteed to swing within millivolts of ground while sinking current-eliminating need for pull-down resistors. CMRR reaches 100dB min at G = 100 with 1k 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 required) |
| Gain Error | 0.04% max at G = 100, RL = 50kΩ - enables <±0.1% system-level accuracy in strain gauge interfaces |
| Input Offset Voltage | 250µV max (LT1101SW grade) - supports µV-level DC-coupled thermocouple amplification |
| Supply Current | 105µA max - allows multi-year operation on coin-cell batteries in remote sensors |
| Common-Mode Range | Within millivolts of ground on single 5V supply - eliminates level-shifting circuitry in 3.3V/5V microcontroller systems |
| Min Supply Voltage | 1.8V guaranteed - compatible with lithium primary cells and two Ni-Cd cells |
| Output Swing | Drives 2kΩ load to ±10V on ±15V supplies; sinks current to ground on single supply - no external pull-down needed |
Pinout & Package
LT1101SW#PBF uses a 16-lead plastic SOIC (wide .300") package (S16W), with θJA = 100°C/W and TJMAX = 150°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | REF (Reference) | Ground reference for output common-mode level; tied to system ground in single-supply configurations |
| 2 | –IN (Inverting Input) | Differential input node; accepts negative leg of bridge or sensor |
| 3 | V– (Negative Supply) | Connect to ground in single-supply mode; –15V max in dual-supply operation |
| 4 | NC | No connection; internally unused |
| 5 | NC | No connection; internally unused |
| 6 | NC | No connection; internally unused |
| 7 | NC | No connection; internally unused |
| 8 | NC | No connection; internally unused |
| 9 | NC | No connection; internally unused |
| 10 | NC | No connection; internally unused |
| 11 | NC | No connection; internally unused |
| 12 | NC | No connection; internally unused |
| 13 | NC | No connection; internally unused |
| 14 | NC | No connection; internally unused |
| 15 | V+ (Positive Supply) | Accepts 1.8V to 15V single supply or +15V in dual supply; powers all internal circuitry |
| 16 | OUTPUT | Amplified differential output; swings to within mV of ground when sinking current |
Key Features
| Feature | Design Value |
|---|---|
| Single-supply operation from 1.8V | Enables direct interfacing with Li-MnO₂, Li-SOCl₂, and dual Ni-Cd cells without voltage boosting |
| Rail-to-rail output sink capability | Eliminates external pull-down resistors and associated power loss in low-voltage sensor nodes |
| Fixed-gain architecture (G = 10/100) | Removes gain-setting resistor tolerance errors and PCB layout sensitivity in production systems |
| ±36V differential input tolerance | Withstands transient overvoltage events in industrial fieldbus or motor control feedback paths |
| 8ppm max gain nonlinearity | Supports 16-bit+ effective resolution in precision weigh-scale and pressure transducer applications |
Applications
| Bridge Transducer Amplifier | Micropower Remote Temperature Sensor |
|---|---|
Use Scenario: Amplifying mV-level differential output from a 350Ω strain gauge bridge powered by 3.3V rail. IC Role / Device Role / Timing Role: Instrumentation amplifier providing fixed G = 100, referenced to system ground, with rail-to-rail output swing. Use Value: Delivers 0.04% gain accuracy and 8ppm linearity without trimming, enabling ±0.05% full-scale measurement repeatability. | Use Scenario: Conditioning output of LM134-3 temperature sensor (10mV/°C) in battery-powered environmental monitor. IC Role / Device Role / Timing Role: Fixed-gain (G = 10) amplifier referenced to ground, operating from single 3.6V lithium cell. Use Value: 105µA supply current extends battery life beyond 5 years; 250µV max VOS ensures ±0.5°C accuracy across 0–70°C. |
| 4–20mA Loop Receiver | Differential Voltage-to-Current Converter |
Use Scenario: Converting 4–20mA loop current into 0.2–1.0V single-ended signal for ADC input in PLC analog input module. IC Role / Device Role / Timing Role: G = 10 instrumentation amplifier with REF pin grounded, driving 250Ω shunt resistor. Use Value: 100dB CMRR rejects common-mode noise from shared ground returns; 1.8V min supply supports wide-input-range isolated loop receivers. | Use Scenario: Generating precise 0–5mA output proportional to differential input voltage in medical sensor front-end. IC Role / Device Role / Timing Role: G = 10 amplifier with REF pin biased to set output compliance; output drives MOSFET gate in Howland current source. Use Value: 0.4µV/°C offset drift minimizes temperature-induced current error; rail-to-rail output ensures full 0–5mA range at low supply voltages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8420ARZ | G = 10–1000 programmable via external resistor; 125µA supply current; 50ppm/°C gain drift | Requires external gain resistor and layout optimization; higher drift limits DC stability in long-term monitoring | Select when variable gain or higher bandwidth (>1.5MHz) is required; not drop-in for LT1101SW#PBF's fixed-G, ultra-low-drift use cases |
| LTC6915IMS8#PBF | Digital gain control (1–100×); 120µA supply current; 10ppm/°C gain drift; SPI interface | Needs MCU firmware integration and SPI routing; adds complexity for simple fixed-gain sensor nodes | Choose when remote gain adjustment or calibration is needed; unsuitable for passive, resistorless designs |
Compared with AD8420ARZ and LTC6915IMS8#PBF, the LT1101SW#PBF offers lower gain drift (4ppm/°C vs ≥10ppm/°C), zero external component count for fixed gain, and guaranteed 1.8V operation-making it optimal for maintenance-free, ultra-low-power, high-accuracy analog front-ends where simplicity and long-term stability are critical.
Availability
LT1101SW#PBF is available at Aetrix Electronics and suitable for battery-powered sensor nodes, industrial process transmitters, portable medical devices, and remote environmental monitors requiring stable component supply across extended product lifecycles.
Supply support for LT1101SW#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.
The LT1101SW#PBF belongs to Linear Technology's legacy precision instrumentation amplifier family, engineered specifically for micropower, single-supply, fixed-gain sensor signal conditioning in space-constrained, battery-operated systems.
FAQ
What are the pin connections required to configure LT1101SW#PBF for G = 10?
To configure LT1101SW#PBF for G = 10, short Pin 2 (–IN) to Pin 1 (REF) and short Pin 16 (OUTPUT) to Pin 1 (REF). This wiring leverages the internal 90R/9R network to set the gain ratio. No external resistors are needed, preserving layout simplicity and eliminating resistor tolerance errors in the LT1101SW#PBF signal path.
Does LT1101SW#PBF support true rail-to-rail output swing on single supply?
Yes, LT1101SW#PBF supports output swing to within millivolts of ground when sinking current, and up to V+ – 1.2V when sourcing. On a 5V single supply, typical output swing is 0.003V to 3.9V into 2kΩ. This rail-to-rail sink capability eliminates external pull-down resistors, reducing power consumption and board area in the LT1101SW#PBF design.
What is the minimum supply voltage specification for LT1101SW#PBF, and under what conditions is it guaranteed?
The LT1101SW#PBF is guaranteed to operate at 1.8V minimum supply voltage across its specified temperature range (0°C to 70°C), with performance degradation limited to gain accuracy only. This specification is verified per the power supply rejection test and confirmed in actual operation with lithium primary cells - a key differentiator of the LT1101SW#PBF versus earlier instrumentation amplifiers.
How does LT1101SW#PBF achieve high common-mode rejection without external trimming?
The LT1101SW#PBF achieves ≥100dB CMRR at G = 100 through laser-trimmed internal thin-film resistors and matched PNP input transistors. Its three-op-amp topology inherently balances common-mode signals, and the 90R/9R network is trimmed during wafer sort. No external components or user calibration are required to meet the LT1101SW#PBF's published CMRR spec.
Can LT1101SW#PBF be used with a 3.3V microcontroller ADC without level shifting?
Yes, LT1101SW#PBF can directly interface with 3.3V microcontroller ADCs. With V+ = 3.3V and REF = 0V, its output swings from ~3mV to ~2.1V into 10kΩ, fully contained within the 0–3.3V ADC input range. The LT1101SW#PBF's rail-to-rail sink capability and 1.8V min supply ensure compatibility with modern low-voltage MCUs without external level-shifting circuitry.
LT1101SW#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- 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:
- 250 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:
- Surface Mount
- Supplier Device Package:
- 16-SO
LT1101SW#PBF FAQ
1.How can I place an order for LT1101SW#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1101SW#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 LT1101SW#PBF reliable?
The price and inventory of LT1101SW#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1101SW#PBF is usually 5 days.
3.What payment methods are accepted for LT1101SW#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1101SW#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1101SW#PBF?
LT1101SW#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1101SW#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 LT1101SW#PBF?
For technical support, including LT1101SW#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1101SW#PBF requirements.
6.How does Aetrix verify that LT1101SW#PBF is sourced from the original manufacturer or authorized distributors?
All LT1101SW#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 LT1101SW#PBF meets industry standards.
7.What is the process for return or replacement of LT1101SW#PBF?
All LT1101SW#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1101SW#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 LT1101SW#PBF part is unused and in its original packaging.
Return procedure for LT1101SW#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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