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Analog Devices Inc. LT1167IS8#PBF
- Part No.:
- LT1167IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1167IS8#PBF.pdf
- Description:
- IC INST AMP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:11,730
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Product details
Overview
LT1167IS8#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 LT1167IS8#PBF datasheet, LT1167IS8#PBF pinout, LT1167IS8#PBF application, or LT1167IS8#PBF equivalent, key selection criteria include guaranteed –40°C to +85°C operation, laser-trimmed 40 μV max input offset voltage, single-resistor gain programming, ESD-hardened inputs (13 kV HBM), and SO-8 package compatibility with IEC 61000-4-2 Level 4 compliance when used with two 5 kΩ resistors.
Technical Context
The LT1167IS8#PBF implements a three-op-amp architecture with laser-trimmed 24.7 kΩ internal resistors and matched NPN superbeta input transistors, ensuring precise gain accuracy (0.08% max at G = 10) and low thermal drift. Its transconductance-based preamp stage scales bandwidth inversely with gain - delivering 1 MHz BW at G = 1 but maintaining 12 kHz at G = 1000 - without proportional bandwidth collapse.
Input bias current remains ≤350 pA across the full –40°C to +85°C range due to superbeta processing, while the REF pin establishes output reference potential with 1 ±0.0001 gain accuracy. The device supports true single-supply operation down to ±2.3 V, with rail-to-rail input common-mode range extending to within 1.9 V of either supply rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Range | 1 to 10,000 via single external RG resistor; enables flexible sensor scaling without multi-resistor networks |
| Input Offset Voltage | 40 μV max (G = 10); laser-trimmed for minimal calibration burden in precision measurement systems |
| CMRR | 90 dB min at G = 1; maintains rejection of interference in noisy industrial environments |
| Supply Current | 1.3 mA max; supports low-power battery-operated instrumentation without sacrificing accuracy |
| Input Voltage Noise | 7.5 nV/√Hz at 1 kHz; preserves signal integrity in low-level thermocouple and strain gauge amplification |
| Operating Temp | –40°C to +85°C; qualified for harsh industrial and automotive under-hood sensor interfaces |
| ESD Rating | 13 kV HBM; withstands handling and system-level ESD events without external protection |
Pinout & Package
LT1167IS8#PBF is housed in an 8-lead plastic SOIC (S8) package with standard JEDEC MS-012AC dimensions (4.9 mm × 3.9 mm × 1.75 mm), optimized for automated assembly and thermal performance (θJA = 190°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | RG (Gain Set) | Connects external resistor to program gain per G = 1 + 49.4 kΩ/RG; sets transconductance of preamp stage |
| 2 | –IN | Inverting input terminal; accepts differential signal with 200 GΩ input resistance and 1.6 pF capacitance |
| 3 | +IN | Non-inverting input terminal; matched to Pin 2 for optimal CMRR and low input offset |
| 4 | –VS | Negative supply rail connection; supports operation down to –2.3 V |
| 5 | REF | Output reference node; defines output DC level; series resistance >2 Ω degrades CMRR and gain accuracy |
| 6 | OUTPUT | Single-ended amplified output; drives capacitive loads up to 1000 pF without instability |
| 7 | +VS | Positive supply rail connection; supports operation up to +18 V |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed gain resistors | 24.7 kΩ absolute value ensures 0.05% gain accuracy at G = 100 with single RG |
| Superbeta input transistors | 350 pA max input bias current enables direct interfacing with high-impedance sensors (e.g., piezoresistive bridges) |
| Thermal drift tracking | 0.3 μV/°C max input offset drift ensures stable calibration over temperature in field-deployed equipment |
| Capacitive load drive | Stable with up to 1000 pF on OUTPUT pin - eliminates need for isolation resistors in PCB layout |
| IEC 61000-4-2 Level 4 ready | Passes 8 kV contact / 15 kV air discharge when used with two external 5 kΩ resistors |
Applications
| Strain Gauge Amplifier | Thermocouple Amplifier |
|---|---|
Use Scenario: Amplifying mV-level differential output from a Wheatstone bridge in a load cell or pressure sensor. IC Role / Device Role / Timing Role: Precision instrumentation amplifier providing programmable gain and high CMRR to reject bridge excitation noise. Use Value: Enables direct interface to 350 Ω or 1 kΩ bridges with <10 ppm nonlinearity at G = 10, eliminating post-amplifier calibration. | Use Scenario: Conditioning microvolt-level thermocouple outputs in industrial furnace controllers. IC Role / Device Role / Timing Role: Cold-junction-compensated signal conditioner with ultra-low input bias current to avoid thermocouple self-heating errors. Use Value: 350 pA max input bias current prevents voltage drop across thermocouple wire resistance, preserving absolute temperature accuracy. |
| Medical Instrumentation | Differential-to-Single-Ended Converter |
Use Scenario: Biopotential signal acquisition in ECG or EEG front-ends where electrode impedance varies widely. IC Role / Device Role / Timing Role: High-input-impedance instrumentation amplifier rejecting 50/60 Hz mains interference while amplifying sub-mV signals. Use Value: 200 GΩ input resistance and 90 dB CMRR ensure stable gain even with dry electrodes or saline-solution interfaces. | Use Scenario: Converting balanced analog sensor outputs (e.g., LVDT, RTD bridges) to single-ended signals for ADC input. IC Role / Device Role / Timing Role: Differential input stage referenced to programmable REF pin, enabling level-shifting to match ADC input range. Use Value: REF pin allows output swing to be centered at 2.5 V or 0 V - simplifying anti-aliasing filter design and eliminating level-shifting op amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar instrumentation amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8421ARZ | Higher bandwidth (12 MHz vs 1 MHz at G = 1), lower noise (3.5 nV/√Hz), but requires dual supply ≥±4.5 V and lacks IEC 61000-4-2 Level 4 qualification | Better suited for high-speed data acquisition; less ideal for low-voltage battery-powered or ESD-critical industrial sensors | Select AD8421ARZ when bandwidth >1 MHz and noise <4 nV/√Hz are required; verify supply headroom and ESD test compliance separately |
| INA128UA | Lower quiescent current (700 μA vs 1.3 mA), wider supply range (±2.25 V to ±18 V), but higher input offset (125 μV max) and no guaranteed –40°C to +85°C performance | Preferred for ultra-low-power portable devices; not recommended for extended-temperature industrial deployments | Select INA128UA only for cost-sensitive, room-temperature applications where power budget is tighter than accuracy requirements |
Compared with AD8421ARZ and INA128UA, LT1167IS8#PBF uniquely balances extended-temperature operation, ESD robustness, and single-resistor gain simplicity - making it optimal for industrial sensor modules requiring long-term calibration stability and field-reliability certification.
Availability
LT1167IS8#PBF is available at Aetrix Electronics and suitable for industrial pressure transducers, medical biopotential monitors, and aerospace strain measurement systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1167IS8#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LT1167IS8#PBF belongs to ADI's legacy Linear Technology precision amplifier portfolio, engineered specifically for low-drift, low-noise instrumentation applications where sensor signal integrity and long-term calibration stability are critical.
FAQ
What is the maximum gain achievable with LT1167IS8#PBF?
The LT1167IS8#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 LT1167IS8#PBF maintains 12 kHz bandwidth and 0.16% max gain error even at this highest gain setting under full temperature range conditions.
Does LT1167IS8#PBF require external trimming for offset voltage?
No, the LT1167IS8#PBF is laser-trimmed during manufacturing to achieve ≤40 μV max input offset voltage at G = 10 and ≤0.3 μV/°C drift - eliminating the need for external trim circuits in most applications. An optional offset adjustment circuit using an external op amp buffer is documented in the datasheet (Figure 2) only for cases demanding sub-10 μV RTI offset.
Can LT1167IS8#PBF operate from a single 5 V supply?
Yes, the LT1167IS8#PBF supports single-supply operation from +5 V (with ground as –VS). The input common-mode range extends to within 1.9 V of either rail, and the output swings to within 1.3 V of each rail at RL = 10 kΩ. For proper operation, the REF pin must be biased appropriately (e.g., to 2.5 V), and one input must remain ≥2.5 V above ground - as demonstrated in the barometer application circuit.
What is the purpose of the REF pin on LT1167IS8#PBF?
Pin 5 (REF) sets the DC reference level for the LT1167IS8#PBF output voltage. The output follows VOUT = VREF + G × (V+IN – V–IN). This allows level-shifting the output to match downstream ADC input ranges. Series resistance on the REF pin degrades CMRR and gain accuracy - a 2 Ω resistor reduces CMRR from 90 dB to 80 dB and adds 0.02% gain error.
How does LT1167IS8#PBF meet IEC 61000-4-2 Level 4 ESD requirements?
The LT1167IS8#PBF passes IEC 61000-4-2 Level 4 (8 kV contact / 15 kV air) when used with two external 5 kΩ resistors between each input and the REF pin - forming a current-limiting network that clamps ESD transients before they reach the internal input stage. This configuration is validated in the datasheet and requires no additional TVS diodes or layout changes beyond the specified resistor placement.
LT1167IS8#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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1167IS8#PBF FAQ
1.How can I place an order for LT1167IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1167IS8#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 LT1167IS8#PBF reliable?
The price and inventory of LT1167IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1167IS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1167IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1167IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1167IS8#PBF?
LT1167IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1167IS8#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 LT1167IS8#PBF?
For technical support, including LT1167IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1167IS8#PBF requirements.
6.How does Aetrix verify that LT1167IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1167IS8#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 LT1167IS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1167IS8#PBF?
All LT1167IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1167IS8#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 LT1167IS8#PBF part is unused and in its original packaging.
Return procedure for LT1167IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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