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Analog Devices Inc. LT1167CS8#PBF
- Part No.:
- LT1167CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1167CS8#PBF.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,995
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Product details
Overview
LT1167CS8#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 sensor conditioning in industrial and medical instrumentation.
For engineers reviewing the LT1167CS8#PBF datasheet, LT1167CS8#PBF pinout, LT1167CS8#PBF application, or LT1167CS8#PBF equivalent, key selection criteria include single-resistor gain programming, ±2.3V to ±18V dual-supply operation, 0.08% max gain error at G = 10, and SO-8 package compatibility with space-constrained PCB layouts.
Technical Context
The LT1167CS8#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, stable amplification without matched external resistor networks.
It features ESD-protected inputs (13 kV HBM), rail-to-rail output swing capability (±VS − 1.2 V), and full operational stability with capacitive loads up to 1000 pF - eliminating need for external compensation in most sensor interface designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 10,000 via single external resistor RG - eliminates complex resistor matching and reduces BOM count. |
| Input Offset Voltage Drift | 0.3 μV/°C max - ensures <10 μV total drift over 0°C to 70°C operating range, critical for long-term sensor calibration stability. |
| CMRR at G = 1 | 90 dB min - rejects common-mode interference from noisy industrial environments without external filtering. |
| Supply Current | 1.3 mA max - supports low-power portable and battery-operated instrumentation systems. |
| Input Voltage Noise | 7.5 nV/√Hz at 1 kHz - preserves signal integrity in low-level thermocouple and strain gauge measurements. |
| Bandwidth at G = 10 | 800 kHz - enables accurate amplification of dynamic pressure or vibration signals up to ~100 kHz. |
| Operating Temperature | 0°C to 70°C - qualified for commercial and industrial control applications with ambient thermal cycling. |
Pinout & Package
LT1167CS8#PBF is housed in an 8-lead plastic SO (SO-8) surface-mount package with standard JEDEC MS-012AC footprint and 1.27 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RG (Gain Set) | Connects to external resistor to program gain per G = 1 + (49.4 kΩ / RG); high-impedance node requiring clean layout. |
| 2 | –IN (Inverting Input) | Differential input terminal; requires matched trace length and impedance to Pin 3 for optimal CMRR. |
| 3 | +IN (Non-Inverting Input) | Differential input terminal; forms high-Z, low-bias-current (350 pA max) interface with bridge sensors. |
| 4 | –VS (Negative Supply) | Connects to negative supply rail; decoupling capacitor must be placed within 5 mm for PSRR integrity. |
| 5 | REF (Reference) | Output reference point; series resistance >2 Ω degrades CMRR below 80 dB and increases gain error. |
| 6 | OUTPUT | Single-ended output referenced to Pin 5; drives 2 kΩ load with ±10 V swing and 0.75 V/μs slew rate. |
| 7 | +VS (Positive Supply) | Connects to positive supply rail; shares same decoupling requirements as Pin 4 for balanced PSRR. |
| 8 | RG (Gain Set) | Duplicate RG connection for Kelvin-style routing; both Pins 1 and 8 must connect to same external resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed gain-setting resistors | 24.7 kΩ absolute value with 0.05% accuracy at G = 100 - guarantees gain error ≤0.08% without external trimming. |
| Superbeta NPN input stage | 350 pA max input bias current - enables direct interfacing with high-impedance piezoresistive and thermocouple sources. |
| ESD-hardened inputs | 13 kV HBM rating - meets IEC 1000-4-2 Level 4 when used with two 5 kΩ external resistors, reducing system-level protection cost. |
| Capacitive load drive | Stable with up to 1000 pF on output - eliminates need for isolation resistors in ADC driver or filter-stage applications. |
| Low 0.1 Hz–10 Hz noise | 0.28 μVP-P at G = 1 - minimizes baseline drift in DC-coupled medical ECG and pressure monitoring circuits. |
Applications
| Bridge Amplifiers | Thermocouple Amplifiers |
|---|---|
|
Use Scenario: Amplifying mV-level differential output from Wheatstone bridge pressure transducers in HVAC and industrial process control. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing programmable gain, high CMRR, and low drift to convert bridge imbalance into calibrated voltage. Use Value: Single-resistor gain setting simplifies calibration across product variants; 0.3 μV/°C drift ensures <±10 μV error over 0°C–70°C ambient range. |
Use Scenario: Cold-junction compensated amplification of Type K thermocouple outputs in furnace temperature controllers. IC Role / Device Role / Timing Role: High-input-impedance, low-noise instrumentation amplifier rejecting thermocouple lead noise while preserving microvolt-level signal fidelity. Use Value: 7.5 nV/√Hz noise density and 350 pA input bias current prevent self-heating errors and preserve resolution down to 0.1°C. |
| Differential to Single-Ended Converters | Medical Instrumentation |
|
Use Scenario: Converting isolated differential biosensor outputs (e.g., EEG, EMG) to single-ended signals compatible with SAR ADC front-ends. IC Role / Device Role / Timing Role: Low-power, rail-swinging instrumentation amplifier driving ADC reference with minimal settling time and no phase inversion. Use Value: 14 μs settling to 0.01% for 10 V step at G = 100 ensures accurate sampling of transient neural activity without acquisition window extension. |
Use Scenario: Signal conditioning for portable blood pressure monitors using MEMS-based barometric sensors. IC Role / Device Role / Timing Role: Precision gain block in single-supply barometer interface, referenced to mid-rail for full-scale analog output compliance. Use Value: Guaranteed 0.08% gain error at G = 10 and 10 ppm nonlinearity enable ±0.5 mmHg pressure accuracy without factory recalibration. |
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 (10 MHz at 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 battery-powered, low-drift DC measurement. | Select AD8421ARMZ when bandwidth >1 MHz and ultra-low noise dominate over power and drift specs. |
| INA128UA | Lower max gain (10,000 vs 1000), higher input bias current (500 pA), wider offset drift (0.5 μV/°C), but lower cost and pin-compatible SO-8 footprint. | Acceptable for cost-sensitive industrial gauges where 0.1°C or 0.1% FS accuracy suffices. | Select INA128UA when budget constraints outweigh need for sub-0.08% gain error and <0.3 μV/°C drift. |
Compared with AD8421ARMZ and INA128UA, LT1167CS8#PBF uniquely balances ultra-low drift (0.3 μV/°C), single-resistor gain flexibility, and 1.3 mA supply current - making it optimal for precision, low-power, production-calibrated sensor interfaces where long-term stability is non-negotiable.
Availability
LT1167CS8#PBF is available at Aetrix Electronics and suitable for bridge amplifiers, thermocouple interfaces, and medical sensor signal chains requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle support.
Supply support for LT1167CS8#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) 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 designed specifically for precision DC-coupled sensor signal conditioning - emphasizing laser-trimmed accuracy, low drift, and single-resistor configurability in compact SO-8 packaging.
FAQ
What is the maximum gain achievable with LT1167CS8#PBF?
The LT1167CS8#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 - requiring careful layout and low-tolerance resistor selection. The LT1167CS8#PBF maintains 10 ppm nonlinearity at G = 100 and 20 ppm at G = 1000 under specified load conditions.
Does LT1167CS8#PBF support single-supply operation?
Yes, LT1167CS8#PBF supports single-supply operation when the REF pin is biased appropriately - for example, at mid-rail - and input common-mode voltage remains within specified limits (e.g., ≥2.5 V above ground for one input). The barometer application circuit in the datasheet demonstrates valid single-supply use with ±10 V output swing referenced to 0 V.
What is the recommended external RG resistor tolerance for G = 100 accuracy?
For G = 100, RG = 499 Ω. To maintain the LT1167CS8#PBF's guaranteed 0.08% max gain error, a 0.05% tolerance metal-film resistor is recommended. Laser-trimmed internal resistors ensure the dominant error source is RG tolerance - not IC matching drift - making tight external resistor selection essential for production calibration.
How does LT1167CS8#PBF handle capacitive loads on its output?
The LT1167CS8#PBF is internally compensated to remain stable with capacitive loads up to 1000 pF across all gain settings. This eliminates need for series isolation resistors typically required with op-amps, preserving signal integrity in ADC driver and active filter applications without sacrificing phase margin or introducing peaking.
Is LT1167CS8#PBF RoHS-compliant and lead-free?
Yes, LT1167CS8#PBF carries the #PBF suffix indicating lead-free finish and full RoHS compliance. It uses matte tin lead plating and meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL-3), with reflow peak temperature up to 260°C - suitable for standard Pb-free SMT assembly processes.
LT1167CS8#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:
- 80 pA
- Voltage - Input Offset:
- 20 µV
- Current - Supply:
- 900µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.6 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1167CS8#PBF FAQ
1.How can I place an order for LT1167CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1167CS8#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 LT1167CS8#PBF reliable?
The price and inventory of LT1167CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1167CS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1167CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1167CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1167CS8#PBF?
LT1167CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1167CS8#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 LT1167CS8#PBF?
For technical support, including LT1167CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1167CS8#PBF requirements.
6.How does Aetrix verify that LT1167CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1167CS8#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 LT1167CS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1167CS8#PBF?
All LT1167CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1167CS8#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 LT1167CS8#PBF part is unused and in its original packaging.
Return procedure for LT1167CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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