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Analog Devices Inc. LT1167AIN8#PBF
- Part No.:
- LT1167AIN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1167AIN8#PBF.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,522
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Product details
Overview
LT1167AIN8#PBF from Analog Devices (formerly Linear Technology) is a precision instrumentation amplifier requiring only one external resistor to set gains from 1 to 10,000. It delivers 7.5 nV/√Hz input voltage noise at 1 kHz, 0.3 μV/°C max input offset drift, and 90 dB CMRR at G = 1 - enabling high-accuracy bridge signal conditioning in industrial sensor interfaces.
For engineers reviewing the LT1167AIN8#PBF datasheet, LT1167AIN8#PBF pinout, LT1167AIN8#PBF application, or LT1167AIN8#PBF equivalent, key selection criteria include guaranteed –40°C to +85°C operation, laser-trimmed 75 μV max input offset voltage (I-grade), 1.6 mA max supply current, and PDIP-8 package compatibility with legacy PCB layouts.
Technical Context
The LT1167AIN8#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 programmability while maintaining matched thermal tracking across temperature.
Input bias current remains ≤600 pA over –40°C to +85°C, and the REF pin establishes output reference potential with 1 ±0.0001 gain accuracy - critical for ratiometric sensor systems where excitation and measurement share a common reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 10,000 via single external resistor RG - eliminates multi-resistor matching errors in precision gain setting. |
| Input Offset Voltage (max) | 75 μV at –40°C to +85°C - ensures <0.0075% error at 10 V full-scale with G = 100. |
| CMRR (G = 1) | 86 dB min over full temperature range - maintains rejection of 10 V common-mode interference down to ~1.5 mV differential error. |
| Supply Current (max) | 1.6 mA at –40°C to +85°C - supports low-power battery-operated sensor nodes without sacrificing DC accuracy. |
| Input Voltage Noise | 7.5 nV/√Hz at 1 kHz - preserves signal integrity in low-level thermocouple or strain gauge outputs. |
| Bandwidth (G = 100) | 120 kHz - sufficient for 50/60 Hz line-powered industrial monitoring with >10× oversampling margin. |
| ESD Rating | 13 kV HBM - withstands handling and board-level ESD events without protection diodes or layout overhead. |
Pinout & Package
LT1167AIN8#PBF is housed in an 8-pin plastic DIP (PDIP-8) package with 0.3-inch width, compatible with through-hole assembly and legacy socketing. Thermal resistance θJA = 130°C/W enables operation up to +85°C ambient without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | RG (Gain Set) | Connects external resistor to program gain per G = 1 + 49.4kΩ/RG - no trimming required for 0.08% gain error at G = 10. |
| 2 | –IN | Inverting input terminal - accepts differential signals with 200 GΩ input resistance and 1.6 pF differential capacitance. |
| 3 | +IN | Non-inverting input terminal - matched to Pin 2 for optimal CMRR; requires bias current return path for floating sources. |
| 4 | –VS | Negative supply rail - supports ±2.3 V to ±18 V operation; input common-mode extends to –VS + 2.1 V. |
| 5 | REF | Output reference node - output voltage is VOUT = VREF + G·(V+IN – V–IN); series resistance degrades CMRR. |
| 6 | OUTPUT | Single-ended amplified output - drives loads ≥2 kΩ with ±10 V swing on ±15 V supplies; stable with 1000 pF capacitive load. |
| 7 | +VS | Positive supply rail - complements Pin 4; PSRR ≥100 dB at G = 1 minimizes supply ripple coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed gain-setting resistors | 24.7 kΩ absolute value with 0.05% matching - enables 0.08% gain error at G = 10 without external calibration. |
| Superbeta NPN input stage | ≤600 pA max input bias current at +85°C - avoids voltage errors in high-impedance Wheatstone bridges (>100 kΩ). |
| Reference pin accuracy | 1 ±0.0001 gain from REF to OUTPUT - supports ratiometric designs where REF ties to bridge excitation voltage. |
| Full-temperature-range specifications | All key DC parameters (VOS, CMRR, PSRR, IB) guaranteed over –40°C to +85°C - eliminates derating calculations for industrial deployments. |
| IEC 1000-4-2 Level 4 compliance | Passes 8 kV contact / 15 kV air discharge when used with two 5 kΩ external resistors - meets industrial EMC requirements out-of-box. |
Applications
| Strain Gauge Amplifier | Thermocouple Amplifier |
|---|---|
Use Scenario: Amplifying microvolt-level differential output from a 350 Ω foil strain gauge in a load cell under mechanical stress. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing gain, common-mode rejection, and low-noise buffering before ADC sampling. Use Value: 75 μV max input offset ensures <0.0075% full-scale error at 10 mV bridge output; 120 kHz bandwidth supports dynamic force measurement up to 10 kHz. | Use Scenario: Conditioning Type K thermocouple output (≈41 μV/°C) with cold-junction compensation in a furnace controller. IC Role / Device Role / Timing Role: High-input-impedance, low-drift amplifier rejecting millivolt-level common-mode noise from heater switching. Use Value: 0.3 μV/°C max VOS drift contributes <0.03°C error over 100°C span; 200 GΩ input resistance prevents thermocouple self-heating. |
| Differential-to-Single-Ended Converter | Medical Instrumentation Front-End |
Use Scenario: Converting balanced EEG electrode signals into single-ended form for analog filtering and digitization. IC Role / Device Role / Timing Role: Low-noise, high-CMRR instrumentation amplifier isolating biopotential signals from 50/60 Hz mains interference. Use Value: 86 dB min CMRR at G = 1 rejects >99.9% of 10 V common-mode noise; 7.5 nV/√Hz noise preserves sub-μV neural signal fidelity. | Use Scenario: Amplifying low-amplitude ECG differential leads in portable patient monitors with strict power budgets. IC Role / Device Role / Timing Role: Ultra-low-power precision amplifier enabling battery life extension while maintaining diagnostic-grade signal integrity. Use Value: 1.6 mA max supply current allows continuous 24-hour operation on coin-cell batteries; 13 kV HBM ESD rating protects against clinical handling events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8421ARZ | Higher bandwidth (10 MHz @ G = 1), lower noise (3.5 nV/√Hz), but requires dual supply and has higher quiescent current (2.5 mA). | Better suited for high-speed data acquisition; less optimal for low-power, wide-temperature industrial sensors. | Select AD8421ARZ when bandwidth >1 MHz or noise <4 nV/√Hz is mandatory; retain LT1167AIN8#PBF for cost-sensitive, low-power, extended-temperature designs. |
| INA128UA | Lower max gain (10,000), similar offset drift (0.3 μV/°C), but wider supply range (±2.25 V to ±18 V) and higher input bias current (1 nA). | Compatible with ultra-low-voltage single-supply systems; less suitable for high-impedance thermocouples or piezoresistive sensors. | Choose INA128UA for designs requiring <±2.3 V supplies or tighter PCB space; prefer LT1167AIN8#PBF for lowest input bias current and guaranteed I-grade performance. |
Compared with AD8421ARZ and INA128UA, the LT1167AIN8#PBF offers the best balance of guaranteed –40°C to +85°C operation, 600 pA max input bias current, and single-resistor gain programming - making it optimal for ruggedized industrial sensor front-ends where long-term stability and ease of calibration outweigh raw speed or ultra-low noise.
Availability
LT1167AIN8#PBF is available at Aetrix Electronics and suitable for industrial sensor conditioning, medical device front-ends, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1167AIN8#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 its precision analog portfolio, emphasizing high-performance signal conditioning ICs for demanding industrial and medical applications.
The LT1167 product line was designed specifically for high-accuracy, low-power instrumentation amplifier applications - targeting strain gauges, thermocouples, and bridge-based sensors where laser-trimmed DC precision and robust ESD tolerance are non-negotiable.
FAQ
What is the maximum guaranteed input offset voltage for LT1167AIN8#PBF over its full operating temperature range?
The LT1167AIN8#PBF guarantees a maximum input offset voltage of 75 μV over the full –40°C to +85°C operating temperature range. This specification is verified per the manufacturer's I-grade characterization and appears in the "ELECTRICAL CHARACTERISTICS" table for LT1167AI/LT1167AI-1 conditions. The LT1167AIN8#PBF achieves this via laser trimming of internal resistors and input transistor pairs during wafer sort.
Can LT1167AIN8#PBF operate from a single 5 V supply, and what are the constraints?
Yes, the LT1167AIN8#PBF supports single-supply operation down to +5 V (with ground as –VS), provided the REF pin is biased within the valid range (–VS + 1.6 V to +VS – 1.6 V) and input common-mode voltage stays within –VS + 2.1 V to +VS – 1.4 V. For a +5 V supply, REF must be between 1.6 V and 3.4 V, and inputs must remain between 2.1 V and 3.6 V. The LT1167AIN8#PBF datasheet confirms this in the "Single Supply Operation" section.
How does the gain-setting resistor RG connect, and what tolerance is recommended?
The gain-setting resistor RG connects between Pins 1 and 8 of the LT1167AIN8#PBF, forming part of the internal transconductance network. The gain equation is G = 1 + (49.4 kΩ / RG). For 0.08% gain error at G = 10, a 0.1% tolerance metal-film resistor is recommended - the LT1167AIN8#PBF's laser-trimmed 24.7 kΩ internal resistors ensure the ratio dominates accuracy, not RG's absolute value.
Does LT1167AIN8#PBF require external ESD protection when used per IEC 1000-4-2 Level 4?
No, the LT1167AIN8#PBF passes IEC 1000-4-2 Level 4 (8 kV contact, 15 kV air) without external protection when two 5 kΩ resistors are placed in series with the +IN and –IN pins - as documented in the "FEATURES" and "APPLICATIONS INFORMATION" sections. This configuration leverages the LT1167AIN8#PBF's inherent 13 kV HBM ESD rating and internal clamping structure.
What is the minimum load resistance the LT1167AIN8#PBF can drive while maintaining specified linearity?
The LT1167AIN8#PBF maintains its specified 10 ppm gain nonlinearity at G = 10 down to a 2 kΩ load resistance, as confirmed in the "ELECTRICAL CHARACTERISTICS" table under "Gain Nonlinearity" conditions. Driving lighter loads (e.g., 600 Ω) increases nonlinearity to 15 ppm - the LT1167AIN8#PBF's output stage is optimized for precision, not high-current delivery, and should interface with high-impedance ADC inputs or buffer stages.
LT1167AIN8#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:
- 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:
- 27 mA
- Voltage - Supply Span (Min):
- 4.6 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1167AIN8#PBF FAQ
1.How can I place an order for LT1167AIN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1167AIN8#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 LT1167AIN8#PBF reliable?
The price and inventory of LT1167AIN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1167AIN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1167AIN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1167AIN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1167AIN8#PBF?
LT1167AIN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1167AIN8#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 LT1167AIN8#PBF?
For technical support, including LT1167AIN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1167AIN8#PBF requirements.
6.How does Aetrix verify that LT1167AIN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1167AIN8#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 LT1167AIN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1167AIN8#PBF?
All LT1167AIN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1167AIN8#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 LT1167AIN8#PBF part is unused and in its original packaging.
Return procedure for LT1167AIN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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