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Analog Devices Inc. LT1167AIS8-1#PBF
- Part No.:
- LT1167AIS8-1#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1167AIS8-1#PBF.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,423
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Product details
Overview
LT1167AIS8-1#PBF from Analog Devices (formerly Linear Technology) is a precision instrumentation amplifier with single-resistor gain programming (G = 1 to 10,000), 0.3 μV/°C max input offset drift, 90 dB min CMRR at G = 1, and ±2.3V to ±18V dual-supply operation. It delivers 7.5 nV/√Hz input voltage noise at 1 kHz and supports bridge sensor amplification in industrial pressure transducers.
For engineers reviewing the LT1167AIS8-1#PBF datasheet, LT1167AIS8-1#PBF pinout, LT1167AIS8-1#PBF application, or LT1167AIS8-1#PBF equivalent, this page provides verified package mapping (8-pin SO), confirmed thermal grade (–40°C to +85°C), validated IEC 1000-4-2 Level 4 ESD compliance with external 5 kΩ resistors, and real-world settling time (14 μs to 0.01% for 10 V step at G ≤ 100).
Technical Context
The LT1167AIS8-1#PBF implements a three-op-amp instrumentation architecture with laser-trimmed 24.7 kΩ internal resistors and superbeta NPN input transistors. Its gain equation G = 1 + (49.4 kΩ/RG) enables precise gain setting via one external resistor while maintaining <0.08% gain error at G = 10.
It features a differential preamp stage that impresses input voltage across RG, feeding a unity-gain difference amplifier. Input bias current remains ≤350 pA across –40°C to +85°C, and output drives capacitive loads up to 1000 pF without instability - critical for sensor signal chains with long cables or ADC input filters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 10,000 set by single external resistor RG - eliminates multi-resistor networks and matching errors. |
| Input Offset Drift | 0.3 μV/°C max - ensures stable DC accuracy over industrial temperature range without recalibration. |
| CMRR | 90 dB min at G = 1 (1 kΩ source imbalance) - rejects common-mode noise from bridge sensors and motor drives. |
| Supply Current | 1.3 mA max - enables low-power battery-operated instrumentation without sacrificing precision. |
| Input Voltage Noise | 7.5 nV/√Hz at 1 kHz - preserves signal integrity in low-level thermocouple and strain gauge measurements. |
| ESD Rating | 13 kV HBM - survives handling and system-level transients when used with two 5 kΩ external resistors per IEC 1000-4-2 Level 4. |
| Operating Temp | –40°C to +85°C - qualified for automotive under-hood, industrial PLC, and outdoor environmental monitoring. |
Pinout & Package
LT1167AIS8-1#PBF is housed in an 8-lead plastic SO (S8) package with standard SOIC-8 footprint (5.0 mm × 4.0 mm, 1.27 mm pitch). Thermal resistance θJA = 190°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (RG) | Gain Set Resistor Connection | Connects external resistor RG to program gain per G = 1 + (49.4 kΩ/RG); open-circuit disables amplifier. |
| 2 (–IN) | Inverting Input | Differential input node; requires matched impedance path to ground for optimal CMRR and bias current return. |
| 3 (+IN) | Non-Inverting Input | Differential input node; high-Z (200 GΩ) input enables direct connection to high-impedance sensors. |
| 4 (–VS) | Negative Supply Rail | Accepts –2.3V to –18V; supplies input stage and output driver; must be decoupled locally. |
| 5 (REF) | Reference Output Reference | Output voltage is referenced to this pin; series resistance degrades CMRR and gain accuracy. |
| 6 (OUTPUT) | Amplified Single-Ended Output | Drives loads ≥2 kΩ; stable with up to 1000 pF capacitance; swing is –VS + 1.4 V to +VS – 1.3 V. |
| 7 (+VS) | Positive Supply Rail | Accepts +2.3V to +18V; supplies input stage and output driver; must be decoupled locally. |
| 8 (RG) | Gain Set Resistor Connection | Second terminal of external RG; forms Kelvin connection to minimize parasitic resistance effects. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed input offset | 40 μV max (G = 10) - eliminates need for external trimming in most precision sensor interfaces. |
| Single-supply compatible REF pin | Operates with REF tied to –VS - enables true single-supply operation down to +4.6 V total supply. |
| High CMRR vs. gain | 126 dB at G = 1000 - maintains rejection of power-line interference even at high gains. |
| Low 0.1–10 Hz noise | 0.28 μVP-P at G = 1 - critical for DC-stable medical and weigh-scale applications. |
| Wide supply range | ±2.3V to ±18V - supports both low-voltage portable systems and high-dynamic-range industrial rails. |
| IEC 1000-4-2 Level 4 ready | Passes 8 kV contact / 15 kV air discharge with two 5 kΩ resistors - reduces system-level ESD design effort. |
Applications
| Strain Gauge Amplifier | Thermocouple Amplifier |
|---|---|
|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from load cells in industrial weighing systems. IC Role / Device Role: Precision differential-to-single-ended converter with programmable gain and rail-to-rail output swing. Use Value: 10 ppm max nonlinearity at G = 10 enables 16-bit+ effective resolution without post-calibration. |
Use Scenario: Cold-junction compensated thermocouple measurement in furnace controllers. IC Role / Device Role: High-impedance, low-drift front-end amplifier rejecting thermocouple lead noise. Use Value: 0.3 μV/°C drift ensures <±0.5°C error over 0–100°C ambient range without software compensation. |
| Differential-to-SE Converter | Medical Instrumentation |
|
Use Scenario: Converting isolated differential signals from current-sense transformers into single-ended ADC inputs. IC Role / Device Role: Low-noise, high-CMRR buffer isolating measurement domain from noisy digital subsystems. Use Value: 105 dB PSRR at G = 1 suppresses switching regulator ripple coupling into sensitive analog paths. |
Use Scenario: Biopotential signal conditioning in ECG/EMG front-ends requiring ultra-low input current. IC Role / Device Role: First-stage amplifier with 350 pA max input bias current to prevent electrode polarization. Use Value: 13 kV HBM ESD rating protects against electrostatic discharge during patient handling and probe insertion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8421ARMZ | Higher bandwidth (12 MHz vs. 1 MHz at G = 1), lower noise (3.5 nV/√Hz), but requires dual external resistors for gain setting. | Better suited for high-speed data acquisition; less ideal for ultra-low-power or cost-sensitive bridge sensor nodes. | Select AD8421ARMZ when bandwidth >1 MHz or noise <5 nV/√Hz is required; verify layout for dual-resistor matching. |
| INA128UA | Lower supply current (700 μA vs. 1.3 mA), wider temp range (–55°C to +125°C), but higher offset drift (1 μV/°C) and no IEC 1000-4-2 qualification. | Preferred for aerospace or extended-temperature environments where ESD robustness is secondary. | Choose INA128UA for extreme temperature operation or ultra-low quiescent power; accept higher drift and reduced ESD margin. |
Compared with AD8421ARMZ and INA128UA, the LT1167AIS8-1#PBF uniquely balances single-resistor simplicity, industrial-grade ESD immunity, and sub-μV/°C drift - making it optimal for cost-sensitive, high-reliability sensor signal chains where layout efficiency and field robustness are prioritized over raw speed or ultra-low power.
Availability
LT1167AIS8-1#PBF is available at Aetrix Electronics and suitable for industrial pressure transducers, medical biopotential monitors, structural health sensing systems, and other applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1167AIS8-1#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 LT1167 product line was originally developed by Linear Technology (acquired by ADI in 2017) to deliver precision instrumentation amplifiers optimized for low-drift, low-noise, and single-resistor gain configuration in harsh industrial environments.
FAQ
What is the maximum gain achievable with LT1167AIS8-1#PBF?
The LT1167AIS8-1#PBF supports gains from 1 to 10,000 using a single external resistor RG, calculated as G = 1 + (49.4 kΩ/RG). At G = 10,000, RG = 4.94 Ω; practical minimum RG is ~5 Ω due to PCB trace resistance and tolerance. Bandwidth drops to 12 kHz at G = 1000, limiting high-gain AC response.
Does LT1167AIS8-1#PBF require external offset trimming?
No. The LT1167AIS8-1#PBF is laser trimmed for input offset voltage (40 μV max at G = 10) and drift (0.3 μV/°C), eliminating external trimming in most applications. An optional offset adjust circuit using an op amp buffer on the REF pin is documented for cases demanding sub-10 μV RTI offset.
Can LT1167AIS8-1#PBF operate from a single 5V supply?
Yes. The LT1167AIS8-1#PBF supports single-supply operation: tie REF to –VS (pin 4), ensure one input stays ≥2.5 V above ground, and keep output within –VS + 1.4 V to +VS – 1.3 V. With +5V and GND rails, output swings from 1.4 V to 3.7 V - sufficient for many 3.3 V ADC interfaces.
How does LT1167AIS8-1#PBF achieve IEC 1000-4-2 Level 4 ESD compliance?
The LT1167AIS8-1#PBF passes IEC 1000-4-2 Level 4 (8 kV contact, 15 kV air) only when two 5 kΩ resistors are placed in series with each input (±IN) before the IC. These resistors limit ESD current into the internal protection diodes and are explicitly validated in the datasheet - no additional external TVS or clamping is required.
What is the purpose of the dual RG pins (pins 1 and 8) on LT1167AIS8-1#PBF?
Pins 1 and 8 are Kelvin connections for the external gain-setting resistor RG. This 4-terminal configuration eliminates errors from PCB trace resistance and solder joint variability, ensuring accurate gain setting - especially critical at high gains (G > 100) where RG values drop below 500 Ω.
LT1167AIS8-1#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Instrumentation
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1.2V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 15 µV
- Current - Supply:
- 900µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.6 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1167AIS8-1#PBF FAQ
1.How can I place an order for LT1167AIS8-1#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1167AIS8-1#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 LT1167AIS8-1#PBF reliable?
The price and inventory of LT1167AIS8-1#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1167AIS8-1#PBF is usually 5 days.
3.What payment methods are accepted for LT1167AIS8-1#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1167AIS8-1#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1167AIS8-1#PBF?
LT1167AIS8-1#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1167AIS8-1#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 LT1167AIS8-1#PBF?
For technical support, including LT1167AIS8-1#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1167AIS8-1#PBF requirements.
6.How does Aetrix verify that LT1167AIS8-1#PBF is sourced from the original manufacturer or authorized distributors?
All LT1167AIS8-1#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 LT1167AIS8-1#PBF meets industry standards.
7.What is the process for return or replacement of LT1167AIS8-1#PBF?
All LT1167AIS8-1#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1167AIS8-1#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 LT1167AIS8-1#PBF part is unused and in its original packaging.
Return procedure for LT1167AIS8-1#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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