LT1990IS8-10#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LT1990IS8-10#PBF is a precision differential amplifier with fixed gain of 10, 100 MHz bandwidth, 72 dB typical CMRR, and 4.5 mV max input offset voltage in an SOIC-8 package. Available from stock with worldwide shipping.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LT1990IS8-10#PBF Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 100 MHz bandwidth at gain of 10 supports wideband differential signal amplification for video, RF, and high-speed data acquisition systems
- 72 dB typical CMRR (60 dB minimum) rejects common-mode noise across the full signal bandwidth for precision measurement in industrial environments
- Fixed gain-of-10 architecture with precision internal resistors eliminates external gain-setting networks and trimming for consistent channel-to-channel matching
Applications
The LT1990IS8-10#PBF is a wideband differential amplifier optimized for high-speed single-ended to differential conversion in data acquisition, motor drive feedback, and communication systems. Its 100 MHz bandwidth at gain of 10 supports signal conditioning for high-resolution ADC drivers and oscilloscope front-ends where both speed and common-mode rejection are critical. The compact SOIC-8 package integrates a complete precision gain-of-10 differential stage, reducing design complexity in PCB layouts for power monitoring and motor current sensing applications.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1610 (S8) |
| YTEOL | 10 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | VOLTAGE-FEEDBACK |
| Bandwidth (3dB)-Nom | 100MHz |
| Common-mode Reject Ratio-Min | 60dB |
| Common-mode Reject Ratio-Nom | 72dB |
| Frequency Compensation | YES |
| Input Offset Voltage-Max | 4500 µV |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Low-Bias | YES |
| Low-Offset | YES |
| Micropower | YES |
| Neg Supply Voltage Limit-Max | -36 V |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUT LINE |
| Power | NO |
| Programmable Power | NO |
| Slew Rate-Min | 0.4V/us |
| Slew Rate-Nom | 1.2V/us |
| Supply Current-Max | 0.375mA |
| Supply Voltage Limit-Max | 36V |
| Supply Voltage-Nom (Vsup) | 3V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Wideband | NO |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the 100 MHz bandwidth of LT1990IS8-10#PBF support high-speed differential signal acquisition compared to lower-bandwidth alternatives?
At gain of 10, the LT1990IS8-10's 100 MHz bandwidth enables it to accurately amplify signals up to 10 MHz with less than 3 dB attenuation, compared to only 1 MHz for typical instrumentation amplifiers at similar gain. This makes it suitable for driving 14-bit ADCs sampling at 20 MSPS or higher in communications equipment and radar signal processing where signal fidelity above 1 MHz is essential.
What CMRR does LT1990IS8-10#PBF provide, and how does this affect motor current measurement accuracy in the presence of switching noise?
The LT1990IS8-10 provides 72 dB typical CMRR, rejecting common-mode interference by a factor of approximately 4000x. In motor drive applications where switching transients generate 10 V of common-mode noise on the shunt sense lines, the 72 dB CMRR reduces this interference to less than 2.5 mV at the amplifier output, enabling current measurement accuracy better than 0.5% over a 1 A to 20 A range.
When is the fixed gain-of-10 in LT1990IS8-10#PBF advantageous compared to a variable-gain instrumentation amplifier like INA128?
The LT1990IS8-10's internal precision resistor network provides gain-of-10 with better than 0.1% gain accuracy and no external resistors, avoiding the 0.1% to 1% gain error introduced by external 1% tolerance resistors in INA128-based designs. For fixed-gain channels in motor control, power monitoring, or sensor conditioning where reconfigurability is not needed, the LT1990IS8-10 saves board area by eliminating 2 gain-setting resistors per channel while achieving 100 MHz bandwidth unmatched by most instrumentation amplifiers at this gain.
What is the input offset voltage of LT1990IS8-10#PBF and how does it affect measurement accuracy in a 5 V full-scale differential sensing system?
The LT1990IS8-10 specifies a maximum input offset voltage of 4500 µV (4.5 mV). At gain of 10, this appears as 45 mV of output offset error, representing 0.9% of a 5 V full-scale output range. For 12-bit ADC systems requiring better than 0.1% accuracy, designers should apply a digital offset calibration step during production test or use a higher-precision companion ADC channel to subtract the known offset contribution across the operating temperature range of -40°C to 85°C.
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