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Analog Devices Inc. LT1167ACS8#TRPBF
- Part No.:
- LT1167ACS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1167ACS8#TRPBF.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,083
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Product details
Overview
LT1167ACS8#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, 0.3 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 LT1167ACS8#TRPBF datasheet, LT1167ACS8#TRPBF pinout, LT1167ACS8#TRPBF application, or LT1167ACS8#TRPBF equivalent, this page provides verified gain-setting behavior, ESD-hardened input performance (13 kV HBM), single-supply barometer interface capability, and SO-8 package thermal characteristics for PCB layout and system-level signal integrity planning.
Technical Context
The LT1167ACS8#TRPBF implements a laser-trimmed, three-op-amp topology with superbeta NPN input transistors achieving 350 pA max input bias current and 200 GΩ input resistance. Its gain equation G = 1 + (49.4 kΩ / RG) is realized via matched internal 24.7 kΩ resistors trimmed to 0.05% accuracy at G = 100.
It supports rail-to-rail output swing within ±1.2 V of supplies (±2.3 V to ±18 V), handles capacitive loads up to 1000 pF without instability, and maintains 0.08% max gain error at G = 10 across 0°C to 70°C - critical for strain gauge and thermocouple amplification where thermal tracking dominates error budgets.
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 IA designs. |
| Input Offset Drift | 0.3 μV/°C max - ensures <10 μV total drift over 40°C industrial ambient range, preserving DC accuracy in load cell systems. |
| CMRR at G = 1 | 90 dB min - rejects common-mode interference from 50/60 Hz mains or motor noise in noisy factory environments. |
| Supply Current | 1.3 mA max - enables low-power operation in battery-powered portable medical devices and handheld test equipment. |
| Input Voltage Noise | 7.5 nV/√Hz at 1 kHz - supports high-resolution measurement of microvolt-level signals from RTDs and thermopiles. |
| ESD Rating | 13 kV HBM - withstands handling and board-level ESD events without protection diodes or external clamping. |
| Operating Temp | 0°C to 70°C - qualified for commercial/industrial control systems where extended temperature testing is not required. |
Pinout & Package
LT1167ACS8#TRPBF is housed in an 8-lead plastic SO (S8) package with 1.27 mm pitch, JEDEC MS-012AC compliant, and rated 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 + 49.4kΩ/RG; high-impedance node sensitive to leakage. |
| 2 (–IN) | Inverting Input | Differential input terminal; requires matched impedance path to REF or ground for bias current return. |
| 3 (+IN) | Non-Inverting Input | Differential input terminal; input resistance >200 GΩ enables direct connection to high-Z sensors like piezoresistive bridges. |
| 4 (–VS) | Negative Supply Rail | Accepts –2.3 V to –18 V; must be decoupled locally to suppress PSRR degradation above 100 kHz. |
| 5 (REF) | Reference Output Reference | Output is referenced to this pin; series resistance >2 Ω degrades CMRR to ≤80 dB and adds gain error. |
| 6 (OUTPUT) | Amplified Single-Ended Output | Drives loads ≥2 kΩ; stable with up to 1000 pF capacitance - supports direct connection to ADC inputs or long cables. |
| 7 (+VS) | Positive Supply Rail | Accepts +2.3 V to +18 V; dual-supply or single-supply operation supported when REF tied to –VS. |
| 8 (RG) | Gain Set Resistor Connection | Second terminal of external RG; forms Kelvin connection with Pin 1 to eliminate PCB trace resistance error. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed gain resistors | 24.7 kΩ internal resistors trimmed to 0.05% at G = 100 - guarantees accurate gain setting without calibration. |
| Superbeta NPN input stage | 350 pA max input bias current and 0.3 μV/°C offset drift - enables high-impedance sensor interfacing with minimal thermal error. |
| ESD-hardened inputs | 13 kV HBM rating - eliminates need for external TVS diodes in field-deployed equipment exposed to human handling. |
| IEC 1000-4-2 Level 4 compliance | Passes 8 kV contact / 15 kV air discharge with two external 5 kΩ resistors - meets industrial EMC immunity requirements. |
| Capacitive load drive | Stable with 1000 pF output capacitance - allows direct routing to SAR ADCs or long traces without isolation resistors. |
Applications
| Strain Gauge Amplifier | Thermocouple Amplifier |
|---|---|
|
Use Scenario: Wheatstone bridge output from metal foil strain gauges in load cells or pressure transducers. IC Role / Device Role / Timing Role: Precision differential-to-single-ended conversion with programmable gain and low-drift offset. Use Value: 10 ppm max gain nonlinearity at G = 10 enables 0.001% full-scale accuracy in Class III weighing systems. |
Use Scenario: Cold-junction compensated thermocouple measurement in furnace controllers or HVAC sensors. IC Role / Device Role / Timing Role: High-CMRR front-end amplifying µV-level Seebeck voltage while rejecting thermocouple wire EMI. Use Value: 90 dB CMRR at G = 1 suppresses 60 Hz pickup from adjacent power lines, reducing post-processing filtering. |
| Differential to Single-Ended Converter | Medical Instrumentation |
|
Use Scenario: Converting balanced outputs from MEMS accelerometers or current-sense transformers. IC Role / Device Role / Timing Role: Low-noise, unity-gain differential receiver driving ADC reference planes. Use Value: 7.5 nV/√Hz input noise preserves SNR in 24-bit delta-sigma ADC systems sampling at 10 kSPS. |
Use Scenario: Biopotential signal acquisition in ECG/EMG modules with dry electrodes and high source impedance. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier providing patient-isolated, low-drift gain before analog filters. Use Value: 350 pA max input bias current prevents electrode polarization errors in sub-100 nA biopotential currents. |
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 vs 1 MHz at G = 1), lower noise (3.5 nV/√Hz), but requires dual supply and has no IEC 1000-4-2 certification. | Preferred for high-speed data acquisition; unsuitable for cost-sensitive industrial sensors needing ESD certification. | Select AD8421ARMZ when bandwidth >1 MHz and noise <4 nV/√Hz are mandatory; verify PCB layout for higher-frequency stability. |
| INA128UA | Lower max gain (1000 vs 10,000), higher input bias current (500 pA), but offers better PSRR (130 dB vs 105 dB at G = 1). | Better suited for single-supply, low-voltage (±2.5 V) systems where ultra-high gain is unnecessary. | Choose INA128UA for battery-powered portable instruments with tight supply constraints and moderate gain needs. |
Compared with AD8421ARMZ and INA128UA, the LT1167ACS8#TRPBF uniquely balances ultra-high gain programmability (1–10,000), certified ESD robustness, and low-cost SO-8 packaging - making it optimal for industrial bridge sensor interfaces where gain flexibility and field reliability outweigh raw speed or ultra-low noise.
Availability
LT1167ACS8#TRPBF is available at Aetrix Electronics and suitable for strain gauge amplifiers, thermocouple interfaces, and differential-to-single-ended converters requiring stable component supply across industrial OEM production cycles.
Supply support for LT1167ACS8#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 precision analog product lines with rigorous qualification and long-term manufacturing commitment.
The LT1167 belongs to Linear's legacy instrumentation amplifier family designed specifically for high-accuracy sensor signal conditioning in industrial, medical, and test equipment - emphasizing laser-trimmed DC precision, ESD resilience, and single-resistor gain configurability.
FAQ
What is the maximum gain achievable with LT1167ACS8#TRPBF and how is it set?
The LT1167ACS8#TRPBF supports gains from 1 to 10,000, set using a single external resistor RG connected between Pins 1 and 8. The relationship is G = 1 + (49.4 kΩ / RG); for G = 10,000, RG = 4.94 Ω. At high gains, input-referred noise is dominated by the superbeta NPN input transistors, maintaining 7.5 nV/√Hz performance.
Does LT1167ACS8#TRPBF support single-supply operation?
Yes, LT1167ACS8#TRPBF supports single-supply operation when the REF pin (Pin 5) is tied to the negative supply rail (Pin 4). This configuration requires the input common-mode voltage to remain ≥2.5 V above ground and the output to stay within the specified swing limits - as demonstrated in the barometer application circuit on page 1 of the datasheet.
What is the ESD rating of LT1167ACS8#TRPBF and is external protection needed?
LT1167ACS8#TRPBF is rated for 13 kV HBM ESD protection on all pins. With two external 5 kΩ resistors, it passes IEC 1000-4-2 Level 4 (8 kV contact, 15 kV air discharge). No external TVS diodes or series resistors are required for standard industrial handling - simplifying BOM and layout for ruggedized sensor nodes.
How does LT1167ACS8#TRPBF handle capacitive loads on its output?
LT1167ACS8#TRPBF is internally compensated to remain stable with output capacitive loads up to 1000 pF across all gain settings. This allows direct connection to ADC input capacitors, long PCB traces, or shielded cables without external isolation resistors - preserving signal integrity in distributed sensor systems.
What is the guaranteed operating temperature range for LT1167ACS8#TRPBF?
LT1167ACS8#TRPBF is specified for 0°C to 70°C operation (AC grade). Key parameters including gain error (0.08% max at G = 10), input offset drift (0.3 μV/°C), and CMRR (90 dB min at G = 1) are guaranteed across this range. For extended temperature operation, the AI-grade variant LT1167AIS8#TRPBF (–40°C to 85°C) is available.
LT1167ACS8#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:
- 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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1167ACS8#TRPBF FAQ
1.How can I place an order for LT1167ACS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1167ACS8#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 LT1167ACS8#TRPBF reliable?
The price and inventory of LT1167ACS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1167ACS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1167ACS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1167ACS8#TRPBF transactions.
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4.How is shipping managed for LT1167ACS8#TRPBF?
LT1167ACS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1167ACS8#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 LT1167ACS8#TRPBF?
For technical support, including LT1167ACS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1167ACS8#TRPBF requirements.
6.How does Aetrix verify that LT1167ACS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1167ACS8#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 LT1167ACS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1167ACS8#TRPBF?
All LT1167ACS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1167ACS8#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 LT1167ACS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1167ACS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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