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Analog Devices Inc. LT1167CS8#TRPBF
- Part No.:
- LT1167CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1167CS8#TRPBF.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,845
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Product details
Overview
LT1167CS8#TRPBF 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, 0.08% max gain error at G = 10, and 40 μV max input offset voltage (laser-trimmed), operating from ±2.3 V to ±15 V supplies. It is widely used in strain gauge and thermocouple amplification where high CMRR and low drift are critical.
For engineers reviewing the LT1167CS8#TRPBF datasheet, LT1167CS8#TRPBF pinout, LT1167CS8#TRPBF application, or LT1167CS8#TRPBF equivalent, this page provides verified specifications, SO-8 package terminal mapping, real-world bridge-sensor interface use cases, and validated alternative parts for design continuity and sourcing flexibility.
Technical Context
The LT1167CS8#TRPBF implements a three-op-amp instrumentation architecture with laser-trimmed 24.7 kΩ internal resistors enabling accurate gain setting via a single external RG resistor (G = 1 + 49.4 kΩ/RG). Its superbeta NPN input stage achieves 350 pA max input bias current and 200 GΩ input resistance while maintaining 90 dB min CMRR at G = 1 over temperature.
It features fully differential input stage with constant-current biasing through feedback loops that impress input differential voltage across RG, ensuring gain accuracy independent of source imbalance. The output stage drives capacitive loads up to 1000 pF without instability and supports reference-level shifting via the dedicated REF pin for single-supply operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 10,000 set by single external resistor RG - eliminates multi-resistor matching errors in discrete designs |
| Input Offset Voltage | 40 μV max (G = 10, TA = 25°C) - enables sub-100 μV system-level offset budgets in precision sensor front-ends |
| CMRR | 90 dB min at G = 1 (0°C to 70°C) - rejects common-mode interference from noisy industrial environments |
| Supply Current | 1.3 mA max (±2.3 V to ±18 V) - supports low-power portable and battery-backed instrumentation |
| Input Voltage Noise | 7.5 nV/√Hz at 1 kHz - preserves signal integrity in low-level transducer outputs like strain gauges |
| Bandwidth | 1000 kHz at G = 1, 12 kHz at G = 1000 - supports DC-coupled static measurements and moderate-speed dynamic sensing |
| Operating Temp | 0°C to 70°C - qualified for commercial and industrial control applications without extended thermal validation |
Pinout & Package
LT1167CS8#TRPBF is housed in an 8-lead plastic SO (Small Outline) package, RoHS-compliant and tape-and-reel packaged for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RG (Gain Set) | Connects to external resistor to define gain (G = 1 + 49.4 kΩ/RG); high-impedance node sensitive to leakage |
| 2 | –IN (Inverting Input) | Differential input terminal; requires matched impedance path to avoid CMRR degradation |
| 3 | +IN (Non-inverting Input) | Differential input terminal; paired with Pin 2 for bridge, thermocouple, or other differential sources |
| 4 | –VS (Negative Supply) | Ground or negative rail connection; must be low-impedance to maintain PSRR >105 dB |
| 5 | REF (Reference) | Output reference level; output = VOUT – VREF = G × (V+IN – V–IN); series resistance degrades CMRR |
| 6 | OUTPUT | Single-ended amplified output; capable of driving ≥2 kΩ load with <10 ppm nonlinearity |
| 7 | +VS (Positive Supply) | Positive supply rail; supports wide range from ±2.3 V to ±18 V for flexible system integration |
| 8 | RG (Gain Set) | Duplicate RG terminal - internally connected to Pin 1; both pins must be tied 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 - ensures gain error ≤0.08% without calibration |
| Superbeta NPN input stage | 350 pA max input bias current and 200 GΩ input resistance - enables direct connection to high-Z sensors (e.g., piezoresistive bridges) |
| ESD-hardened inputs | 13 kV HBM rating - survives handling and board-level ESD events without protection circuitry |
| Capacitive load drive | Stable with up to 1000 pF on output - eliminates need for isolation resistors in PCB layout |
| IEC 1000-4-2 Level 4 compliance | Achieved with two external 5 kΩ resistors - meets industrial immunity requirements without added components |
Applications
| Strain Gauge Amplifier | Thermocouple Amplifier |
|---|---|
|
Use Scenario: Amplifying mV-level Wheatstone bridge output from metal foil or semiconductor strain gauges in load cells and pressure sensors. IC Role / Device Role / Timing Role: Precision differential-to-single-ended conversion with programmable gain and high CMRR to reject bridge excitation noise. Use Value: 10 ppm max gain nonlinearity at G = 10 ensures ≤0.001% full-scale error in 16-bit data acquisition systems. |
Use Scenario: Conditioning microvolt-level Seebeck voltage from Type K or J thermocouples in industrial temperature monitoring. IC Role / Device Role / Timing Role: Cold-junction-compensated front-end with low input bias current to avoid thermocouple self-heating errors. Use Value: 0.3 μV/°C max input offset drift maintains ±0.1°C accuracy over 0°C–70°C ambient without recalibration. |
| Differential-to-SE Converter | Medical Instrumentation |
|
Use Scenario: Converting balanced analog signals (e.g., from isolated ADC drivers or transformer-coupled sensors) to single-ended for SAR ADC input. IC Role / Device Role / Timing Role: High-PSRR (105 dB min) and low-noise amplification preserving signal fidelity in mixed-signal signal chains. Use Value: 7.5 nV/√Hz input noise density enables >100 dB SNR in 100 Hz bandwidth applications without oversampling. |
Use Scenario: Front-end amplification for ECG, EEG, or EMG electrodes where ultra-low input bias current prevents skin-electrode polarization. IC Role / Device Role / Timing Role: Biopotential amplifier with high input impedance (>200 GΩ) and low 0.28 μVP-P 0.1–10 Hz noise for clean bio-signal capture. Use Value: 350 pA max input bias current avoids DC offset shifts during long-duration patient monitoring sessions. |
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 no integrated REF pin | Better suited for high-speed, low-noise applications (e.g., fast transient detection); lacks single-supply flexibility of LT1167CS8#TRPBF | Select AD8421ARMZ when bandwidth >1 MHz and noise <4 nV/√Hz are required; verify REF-level handling in system architecture |
| INA128UA | Lower max gain (10,000), higher input bias current (500 pA), wider temp range (–40°C to 125°C), but lower cost and pin-compatible SO-8 footprint | Preferred for cost-sensitive, extended-temperature industrial controls where 0.15% gain error is acceptable | Choose INA128UA for high-volume production with tighter BOM cost targets; confirm 0.15% gain error meets system accuracy budget |
Compared with AD8421ARMZ and INA128UA, the LT1167CS8#TRPBF uniquely balances ultra-low input bias current (350 pA), integrated REF pin for flexible level-shifting, and IEC 1000-4-2 compliance - making it optimal for precision, low-power, and EMC-robust sensor interfaces in commercial-grade equipment.
Availability
LT1167CS8#TRPBF is available at Aetrix Electronics and suitable for strain gauge amplifiers, thermocouple interfaces, and medical biopotential front-ends requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for LT1167CS8#TRPBF 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 legacy of high-precision analog ICs with rigorous process control and laser trimming.
The LT1167 product line was designed specifically for low-power, high-accuracy sensor signal conditioning - targeting applications where single-resistor gain programming, low drift, and robust ESD immunity are essential.
FAQ
What is the maximum gain achievable with LT1167CS8#TRPBF and how is it set?
The LT1167CS8#TRPBF supports gains from 1 to 10,000, set precisely using a single external resistor RG connected between Pins 1 and 8. The gain equation is G = 1 + 49.4 kΩ/RG; for G = 10,000, RG = 4.94 Ω. The LT1167CS8#TRPBF's laser-trimmed internal resistors ensure 0.08% max gain error at G = 10, eliminating need for multi-resistor networks or calibration.
Does LT1167CS8#TRPBF support single-supply operation?
Yes, the LT1167CS8#TRPBF supports single-supply operation by tying the REF pin (Pin 5) to a defined reference voltage (e.g., mid-rail or ground), provided the input common-mode voltage stays within spec (e.g., ≥2.5 V above ground for ±15 V equivalent operation) and output remains within swing limits. The barometer application in the datasheet demonstrates valid single-supply use with LT1167CS8#TRPBF.
What is the input bias current specification for LT1167CS8#TRPBF and why does it matter?
The LT1167CS8#TRPBF has a maximum input bias current of 350 pA at 25°C, achieved via superbeta NPN input transistors. This ultra-low value prevents voltage errors when interfacing with high-impedance sources like piezoresistive bridges or thermocouples - ensuring measurement accuracy isn't degraded by bias current flowing through source impedances. The LT1167CS8#TRPBF's 200 GΩ input resistance further supports such applications.
How does LT1167CS8#TRPBF handle capacitive loads on its output?
The LT1167CS8#TRPBF is internally compensated to remain stable with capacitive loads up to 1000 pF across all gain configurations - a key advantage over many instrumentation amplifiers requiring external isolation resistors. This allows direct connection to ADC input capacitors, long PCB traces, or filtering networks without risk of peaking or oscillation, simplifying layout and improving signal integrity in the LT1167CS8#TRPBF-based design.
Is LT1167CS8#TRPBF compliant with IEC 61000-4-2 ESD standards?
Yes, the LT1167CS8#TRPBF passes IEC 61000-4-2 Level 4 (±8 kV contact, ±15 kV air) when used with two external 5 kΩ resistors on its inputs - a configuration explicitly validated in the datasheet. Its inputs withstand 13 kV HBM ESD stress, making the LT1167CS8#TRPBF suitable for industrial environments where electrostatic discharge immunity is mandatory.
LT1167CS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 27 mA
- 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#TRPBF FAQ
1.How can I place an order for LT1167CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1167CS8#TRPBF 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#TRPBF reliable?
The price and inventory of LT1167CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1167CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1167CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1167CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1167CS8#TRPBF?
LT1167CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1167CS8#TRPBF 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#TRPBF?
For technical support, including LT1167CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1167CS8#TRPBF requirements.
6.How does Aetrix verify that LT1167CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1167CS8#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1167CS8#TRPBF?
All LT1167CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1167CS8#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LT1167CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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