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Analog Devices Inc. LT1167CN8#PBF
- Part No.:
- LT1167CN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1167CN8#PBF.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:528
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Product details
Overview
LT1167CN8#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 LT1167CN8#PBF datasheet, LT1167CN8#PBF pinout, LT1167CN8#PBF application, or LT1167CN8#PBF equivalent, key selection criteria include gain error (0.08% max at G = 10), input bias current (350 pA max), supply range (±2.3 V to ±18 V), and PDIP-8 package compatibility with legacy analog signal chains.
Technical Context
The LT1167CN8#PBF implements a three-op-amp topology with laser-trimmed 24.7 kΩ internal resistors and superbeta NPN input transistors, enabling precise gain setting via single external RG and achieving <0.3 μV/°C input offset drift. Its preamp stage transconductance scales with programmed gain, maintaining bandwidth efficiency across G = 1–1000.
It supports single-supply operation with REF pin referenced to negative rail, handles capacitive loads up to 1000 pF, and meets IEC 1000-4-2 Level 4 ESD (13 kV HBM) when used with two external 5 kΩ resistors - critical for ruggedized sensor front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 10,000 set by single external resistor RG; enables flexible scaling without complex resistor networks. |
| Input Voltage Noise | 7.5 nV/√Hz at 1 kHz; ensures low-noise amplification of microvolt-level sensor outputs like strain gauges. |
| Input Offset Drift | 0.3 μV/°C max; minimizes thermal-induced errors in unregulated environments (0°C to 70°C operating range). |
| CMRR | 90 dB min at G = 1; rejects common-mode interference from noisy industrial power supplies or long sensor cables. |
| Supply Current | 1.3 mA max; supports low-power portable instrumentation and battery-backed systems. |
| Input Bias Current | 350 pA max; preserves signal integrity with high-impedance sources (e.g., thermocouples, piezoresistive sensors). |
| Output Swing | ±VS − 1.3 V (RL = 10 kΩ); delivers full-rail-compatible output into standard ADC reference ranges. |
Pinout & Package
LT1167CN8#PBF is housed in an 8-pin plastic dual in-line package (PDIP), suitable for through-hole prototyping and legacy PCB layouts. Thermal resistance θJA = 130°C/W enables stable operation at ambient temperatures up to +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | RG (Gain Set) | Connects external resistor to program gain per G = 1 + 49.4 kΩ/RG; no trimming required. |
| 2 | −IN | Inverting input terminal; differential pair base node for high-CMRR signal acquisition. |
| 3 | +IN | Non-inverting input terminal; matched to −IN for <10 ppm nonlinearity at G = 10. |
| 4 | −VS | Negative supply rail; supports ±2.3 V to ±18 V operation; must be decoupled locally. |
| 5 | REF | Reference output node; sets output common-mode level; series resistance degrades CMRR. |
| 6 | OUTPUT | Single-ended amplified output; drives capacitive loads ≤1000 pF without instability. |
| 7 | +VS | Positive supply rail; complements −VS for bipolar or single-supply configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed precision | 40 μV max input offset voltage and 0.08% gain error at G = 10 ensure calibration-free accuracy. |
| Single-resistor gain programming | Eliminates matching errors and layout sensitivity associated with discrete resistor networks. |
| ESD-hardened inputs | 13 kV human-body-model protection enables direct connection to exposed sensor terminals. |
| Capacitive load drive | Stable operation with up to 1000 pF on OUTPUT simplifies anti-aliasing filter integration. |
| Wide supply range | ±2.3 V to ±18 V operation supports both low-voltage portable designs and industrial ±15 V rails. |
Applications
| Strain Gauge Amplifier | Thermocouple Amplifier |
|---|---|
|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from load cells or pressure transducers in factory automation. IC Role / Device Role / Timing Role: Precision differential-to-single-ended conversion with programmable gain and low drift. Use Value: 10 ppm nonlinearity at G = 10 and 0.3 μV/°C drift enable sub-0.1% total error over 0°C–70°C. |
Use Scenario: Cold-junction-compensated amplification of Type K/J thermocouple signals in HVAC controllers. IC Role / Device Role / Timing Role: High-input-impedance, low-bias-current front-end rejecting millivolt-level common-mode noise. Use Value: 350 pA input bias current prevents voltage drop across high-Z thermocouple leads and cold-junction resistors. |
| Differential to Single-Ended Converter | Medical Instrumentation |
|
Use Scenario: Converting isolated differential biosensor outputs (e.g., EEG, EMG) to single-ended signals for ADC sampling. IC Role / Device Role / Timing Role: Low-noise, high-CMRR buffer isolating patient-connected circuits from digital processing stages. Use Value: 7.5 nV/√Hz noise density and 90 dB CMRR suppress 50/60 Hz mains interference without active filtering. |
Use Scenario: Front-end amplification in portable ECG monitors requiring FDA-compliant signal fidelity and low power. IC Role / Device Role / Timing Role: Precision gain stage meeting IEC 60601-1 leakage current and noise requirements. Use Value: 1.3 mA supply current and ±2.3 V minimum supply support battery-operated 24/7 monitoring. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD620ARZ | Higher supply current (1.3 mA vs 1.3 mA typ), lower CMRR (100 dB min at G = 1), no integrated ESD protection. | Requires external ESD diodes for harsh environments; less suitable for direct sensor interface without protection circuitry. | Preferred where ultra-low cost and wide availability outweigh need for integrated ESD robustness. |
| INA128UA | Lower input bias current (50 pA), higher gain error (0.15% max at G = 10), narrower supply range (±2.25 V to ±18 V). | Better for ultra-high-impedance pH or ion-selective electrodes; less optimal for wide-temp industrial use due to higher drift. | Select when bias current dominates design constraints and temperature range is limited to 0°C–70°C. |
Compared with AD620ARZ and INA128UA, the LT1167CN8#PBF offers superior ESD immunity (13 kV HBM), tighter gain error (0.08% vs ≥0.15%), and guaranteed performance across its full 0°C–70°C range - making it optimal for ruggedized, calibration-sensitive sensor interfaces.
Availability
LT1167CN8#PBF is available at Aetrix Electronics and suitable for strain gauge amplifiers, thermocouple conditioners, medical biosignal front-ends, and industrial process monitoring requiring stable component supply and long-term obsolescence management.
Supply support for LT1167CN8#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 DSP solutions, serving industrial, automotive, communications, and healthcare markets.
The LT1167CN8#PBF belongs to Linear Technology's precision instrumentation amplifier product line, designed specifically for low-drift, low-noise sensor signal conditioning in demanding measurement applications.
FAQ
What is the maximum gain achievable with LT1167CN8#PBF?
The LT1167CN8#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 (±0.1% tolerance recommended). The LT1167CN8#PBF maintains 10 ppm nonlinearity at G = 100 and 20 ppm at G = 1000 under specified conditions.
Does LT1167CN8#PBF require external trimming for offset voltage?
No - the LT1167CN8#PBF is laser trimmed to deliver ≤40 μV input offset voltage and ≤0.3 μV/°C drift, eliminating the need for external nulling circuits in most applications. Optional offset adjustment is possible via the REF pin using an external op-amp buffer, as shown in Figure 2 of the datasheet.
Can LT1167CN8#PBF operate from a single 5V supply?
Yes - the LT1167CN8#PBF supports single-supply operation down to +4.6 V total (±2.3 V equivalent). With REF tied to ground or mid-rail, and inputs biased within −VS + 2.1 V to +VS − 1.3 V, the LT1167CN8#PBF delivers rail-to-rail compatible output swing while maintaining CMRR and PSRR specifications.
What is the thermal resistance (θJA) of the LT1167CN8#PBF package?
The LT1167CN8#PBF uses an 8-lead PDIP package with θJA = 130°C/W. This value assumes standard JEDEC 2S2P test board conditions; actual junction temperature rise depends on PCB copper area, airflow, and ambient temperature. For continuous operation at +70°C ambient, power dissipation should remain below 156 mW.
How does LT1167CN8#PBF handle capacitive loads on its output?
The LT1167CN8#PBF is internally compensated to drive capacitive loads up to 1000 pF in any gain configuration without oscillation or excessive overshoot. This allows direct connection to RC anti-aliasing filters or ADC input capacitance without external isolation resistors - verified in Typical Performance Characteristic Figure 1167 G25.
LT1167CN8#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:
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LT1167CN8#PBF FAQ
1.How can I place an order for LT1167CN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1167CN8#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 LT1167CN8#PBF reliable?
The price and inventory of LT1167CN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1167CN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1167CN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1167CN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1167CN8#PBF?
LT1167CN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1167CN8#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 LT1167CN8#PBF?
For technical support, including LT1167CN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1167CN8#PBF requirements.
6.How does Aetrix verify that LT1167CN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1167CN8#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 LT1167CN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1167CN8#PBF?
All LT1167CN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1167CN8#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 LT1167CN8#PBF part is unused and in its original packaging.
Return procedure for LT1167CN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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