LT1920CN8 Linear Technology Integrated Circuit (Dual-In-Line Packages) In Stock
LT1920CN8 is a single resistor gain programmable precision instrumentation amplifier in an 8-pin DIP package. It provides 1 MHz bandwidth, 75 dB minimum CMRR, and 185 µV maximum input offset voltage. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Linear Technology
- Package
- Dual-In-Line Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- LT1920CN8 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 70.0°C
- RoHS
- Non-compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Single external resistor sets gain, simplifying PCB design versus multi-resistor networks in traditional instrumentation amplifiers
- 1 MHz bandwidth (3 dB) with 75 dB minimum common-mode rejection ratio for precision differential signal acquisition
- Ultra-low input offset current of 1 nA maximum and 2 nA maximum bias current for high-impedance sensor interfacing
Applications
The LT1920CN8 is designed for precision data acquisition systems where a single resistor gain-setting simplifies board layout in bridge sensor amplification, thermocouple signal conditioning, and medical instrumentation. Its 75 dB CMRR and sub-200 µV offset voltage make it suitable for extracting small differential signals from noisy industrial environments. It is also used in weigh scales, strain gauge signal conditioners, and portable medical devices requiring low input bias current and 8-pin DIP form factor.
Specifications
| Reach Compliance Code | Not Compliant |
| YTEOL | 0 |
| Amplifier Type | INSTRUMENTATION AMPLIFIER |
| Average Bias Current-Max (IIB) | 0.002 µA |
| Bandwidth (3dB)-Nom | 1MHz |
| Common-mode Reject Ratio-Min | 75dB |
| Input Offset Current-Max (IIO) | 0.001 µA |
| Input Offset Voltage-Max | 185 µV |
| JESD-30 Code | R-PDIP-T8 |
| JESD-609 Code | e0 |
| Neg Supply Voltage Limit-Max | -20 V |
| Neg Supply Voltage-Nom (Vsup) | -15 V |
| Non-linearity-Max | 0.003% |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Qualification Status | Not Qualified |
| Slew Rate-Nom | 1.2V/us |
| Supply Voltage Limit-Max | 20V |
| Supply Voltage-Nom (Vsup) | 15V |
| Surface Mount | NO |
| Technology | BIPOLAR |
| Temperature Grade | OTHER |
| Terminal Finish | Tin/Lead (Sn/Pb) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Voltage Gain-Max | 10000 |
| Voltage Gain-Min | 1 |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Non-compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does gain setting work on the LT1920CN8 and what values are achievable?
Gain on the LT1920CN8 is set with a single external resistor connected between pins 1 and 8. The gain formula is G = 1 + (49.4 kΩ / RG), allowing gains from 1 to over 1000 V/V depending on the selected RG. This simplifies PCB design by eliminating the matched resistor networks required in traditional 3-op-amp instrumentation amplifier topologies.
For a bridge sensor application, what CMRR and offset voltage specifications does the LT1920CN8 provide?
The LT1920CN8 provides a minimum CMRR of 75 dB and a maximum input offset voltage of 185 µV, making it well suited for amplifying small differential signals from Wheatstone bridge strain gauges and pressure sensors. The 1 MHz bandwidth supports dynamic measurements, while the 2 nA maximum bias current minimizes error in high-impedance sensor circuits.
When is the LT1920CN8 8-pin DIP package preferred over surface-mount alternatives for prototyping?
The LT1920CN8 in PDIP-8 (DIP-8) package is preferred during prototyping and breadboard development because it plugs directly into standard 0.1-inch pitch sockets without soldering. Engineers evaluating precision instrumentation amplifier designs with gains set by a single resistor can iterate quickly on gain values by swapping RG resistors in socket without reworking PCB assemblies.
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