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Analog Devices Inc. LT1167ACN8#PBF
- Part No.:
- LT1167ACN8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1167ACN8#PBF.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,301
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Product details
Overview
LT1167ACN8#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 signal conditioning in industrial pressure transducers and medical instrumentation.
For engineers reviewing the LT1167ACN8#PBF datasheet, LT1167ACN8#PBF pinout, LT1167ACN8#PBF application, or LT1167ACN8#PBF equivalent, key selection criteria include guaranteed 0.08% max gain error at G = 10, ±2.3V to ±15V supply operation, 8-pin PDIP package with 0°C to 70°C temperature range, and laser-trimmed input offset voltage ≤40 μV.
Technical Context
The LT1167ACN8#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 using a single external resistor while maintaining matched transconductance scaling across gain settings.
Input bias current remains ≤350 pA via superbeta processing, and ESD protection withstands 13 kV (HBM). The device supports capacitive loads up to 1000 pF without instability and meets IEC 1000-4-2 Level 4 when used with two external 5 kΩ resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 10,000, set by single external resistor RG per G = 1 + (49.4 kΩ / RG) |
| Input Voltage Noise | 7.5 nV/√Hz at 1 kHz - enables low-noise amplification of microvolt-level bridge outputs |
| Input Offset Drift | 0.3 μV/°C max - ensures stable DC accuracy over industrial temperature range |
| CMRR | 90 dB min at G = 1 - rejects common-mode interference from noisy plant environments |
| Supply Current | 1.3 mA max - supports low-power portable and battery-backed instrumentation |
| Input Offset Voltage | 40 μV max - reduces calibration burden in precision weigh-scale and strain-gauge systems |
| PSRR | 105 dB min at G = 1 - maintains accuracy despite ripple on shared power rails |
Pinout & Package
LT1167ACN8#PBF is housed in an 8-lead plastic dual in-line package (PDIP), with 0.3-inch body width and standard through-hole mounting. Thermal resistance θJA = 130°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | RG (Gain Set) | Connects external resistor to program gain; pins are internally tied for single-point connection |
| 2 | –IN | Inverting input terminal; accepts differential input signals with 200 GΩ input resistance |
| 3 | +IN | Non-inverting input terminal; matched to Pin 2 for optimal CMRR |
| 4 | –VS | Negative supply rail connection; supports operation down to –2.3 V |
| 5 | REF | Reference output level; output voltage is VOUT = VREF + G × (V+IN – V–IN) |
| 6 | OUTPUT | Single-ended amplified output; drives loads ≥2 kΩ with ±10 V swing at ±15 V supplies |
| 7 | +VS | Positive supply rail connection; supports operation up to +15 V |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor gain programming | Enables field-adjustable gain from 1 to 10,000 without redesigning feedback networks |
| Laser-trimmed input stage | Guarantees ≤40 μV input offset voltage and ≤0.3 μV/°C drift for stable long-term calibration |
| 13 kV HBM ESD protection | Eliminates need for external transient suppressors in handheld test equipment and field-deployed sensors |
| Capacitive load drive | Stable operation with up to 1000 pF output capacitance - simplifies routing to ADC inputs or long cables |
| IEC 1000-4-2 Level 4 compliance | Validated with two external 5 kΩ resistors - meets industrial immunity requirements out-of-the-box |
Applications
| Bridge Amplifiers | Thermocouple Amplifiers |
|---|---|
Use Scenario: Amplifying mV-level differential output from a 350 Ω strain gauge in a load cell under varying ambient temperatures. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing gain, common-mode rejection, and low-drift DC accuracy. Use Value: 10 ppm max nonlinearity at G = 10 ensures <0.001% measurement error across full scale, critical for Class III weighing systems. | Use Scenario: Conditioning Type K thermocouple output (≈41 μV/°C) in a furnace controller with cold-junction compensation. IC Role / Device Role / Timing Role: High-input-impedance, low-bias-current amplifier rejecting millivolt-level common-mode noise from heating elements. Use Value: 350 pA max input bias current prevents voltage drop across high-impedance thermocouple leads, preserving absolute temperature accuracy. |
| Medical Instrumentation | Differential to Single-Ended Converters |
Use Scenario: Amplifying ECG electrode signals (0.5–5 mV) in a portable patient monitor with battery-powered operation. IC Role / Device Role / Timing Role: Low-power, low-noise instrumentation amplifier with rail-to-rail compatible output swing. Use Value: 0.9 mA typical supply current extends battery life; 7.5 nV/√Hz noise preserves QRS complex fidelity for arrhythmia detection. | Use Scenario: Converting differential analog output from an isolated current-sense amplifier to single-ended signal for SAR ADC input. IC Role / Device Role / Timing Role: Precision gain block with user-defined reference level (REF pin) for level-shifting. Use Value: REF pin allows direct interface to ADC reference voltage, eliminating level-shifting op amps and reducing component count. |
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 (12 MHz vs 1 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 data acquisition; lacks REF pin flexibility for single-ended ADC interfacing | Select AD8421ARMZ when bandwidth >10× LT1167ACN8#PBF is required and REF pin functionality is not needed |
| INA128UA | Lower max gain (10,000 vs same), higher input bias current (1 nA vs 350 pA), wider supply range (±2.25V to ±18V), but lower cost | Acceptable for general-purpose industrial sensing where ultra-low bias current is not critical | Select INA128UA for cost-sensitive applications with relaxed DC accuracy and bias current requirements |
Compared with AD8421ARMZ and INA128UA, the LT1167ACN8#PBF uniquely balances laser-trimmed DC precision, single-resistor gain control, and REF-pin-based level shifting - making it optimal for embedded sensor nodes requiring calibrated, low-drift, low-component-count signal chains.
Availability
LT1167ACN8#PBF is available at Aetrix Electronics and suitable for industrial pressure transducers, medical ECG monitors, and precision weigh-scale systems requiring stable component supply across multi-year production cycles.
Supply support for LT1167ACN8#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 legacy of high-precision analog ICs for demanding measurement applications.
The LT1167 product line was designed specifically for low-power, high-accuracy instrumentation tasks - emphasizing laser-trimmed DC performance, single-resistor gain flexibility, and robustness in harsh industrial and medical environments.
FAQ
What is the maximum gain achievable with LT1167ACN8#PBF?
The LT1167ACN8#PBF supports gains from 1 to 10,000, set by a single external resistor RG using the formula G = 1 + (49.4 kΩ / RG). At G = 10,000, RG = 4.945 Ω; practical layout and tolerance considerations recommend using precision metal-film resistors with ≤0.1% tolerance for gains above 100. The LT1167ACN8#PBF maintains 10 ppm nonlinearity even at G = 1000.
Does LT1167ACN8#PBF support single-supply operation?
Yes, the LT1167ACN8#PBF supports single-supply operation when the REF pin is tied to a defined bias voltage (e.g., mid-supply) and input common-mode voltage stays within specified limits (e.g., ≥2.5 V above ground for ±15 V equivalent operation). The barometer application in the datasheet demonstrates valid single-supply use with output referenced to ground. The LT1167ACN8#PBF does not require dual supplies but benefits from them in high-CMRR applications.
What is the purpose of the REF pin on LT1167ACN8#PBF?
The REF pin on the LT1167ACN8#PBF sets the output voltage reference level: VOUT = VREF + G × (V+IN – V–IN). It enables level-shifting without external op amps - for example, connecting REF to an ADC's reference voltage eliminates offset errors in digitized measurements. Series resistance >2 Ω degrades CMRR; the LT1167ACN8#PBF datasheet specifies that low-impedance buffering is essential for best performance.
How does LT1167ACN8#PBF handle capacitive loads?
The LT1167ACN8#PBF is internally compensated to drive capacitive loads up to 1000 pF in any gain configuration without oscillation or excessive overshoot. This capability simplifies interface to ADC input capacitors, long PCB traces, or shielded cables. For loads >1000 pF, external isolation resistance (e.g., 10–50 Ω in series with output) restores stability. The LT1167ACN8#PBF maintains ≤1% overshoot at 1000 pF per typical performance curves.
Is LT1167ACN8#PBF RoHS compliant and lead-free?
Yes, the LT1167ACN8#PBF carries the #PBF suffix, indicating lead-free finish and full RoHS compliance per EU Directive 2011/65/EU. The part uses matte tin lead plating and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30°C/60% RH. The LT1167ACN8#PBF is qualified for reflow soldering per IPC/JEDEC J-STD-020 standards.
LT1167ACN8#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:
- -
- 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
LT1167ACN8#PBF FAQ
1.How can I place an order for LT1167ACN8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1167ACN8#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 LT1167ACN8#PBF reliable?
The price and inventory of LT1167ACN8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1167ACN8#PBF is usually 5 days.
3.What payment methods are accepted for LT1167ACN8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1167ACN8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1167ACN8#PBF?
LT1167ACN8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1167ACN8#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 LT1167ACN8#PBF?
For technical support, including LT1167ACN8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1167ACN8#PBF requirements.
6.How does Aetrix verify that LT1167ACN8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1167ACN8#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 LT1167ACN8#PBF meets industry standards.
7.What is the process for return or replacement of LT1167ACN8#PBF?
All LT1167ACN8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1167ACN8#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 LT1167ACN8#PBF part is unused and in its original packaging.
Return procedure for LT1167ACN8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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