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OPA2251UA/2K5
Texas Instruments
IC OPAMP GP 2 CIRCUIT 8SOIC
1499 Pcs New Original In Stock
General Purpose Amplifier 2 Circuit Rail-to-Rail 8-SOIC
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5.0 / 5.0
- (38 Ratings)
OPA2251UA/2K5
Product Overview
12796079
DiGi Electronics Part Number
OPA2251UA/2K5-DGManufacturer
Texas Instruments
OPA2251UA/2K5
Description
IC OPAMP GP 2 CIRCUIT 8SOICInventory
1499 Pcs New Original In Stock
General Purpose Amplifier 2 Circuit Rail-to-Rail 8-SOIC
Quantity
Minimum 1
Minimum 1
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OPA2251UA/2K5 Technical Specifications
Category
Linear, Amplifiers, Instrumentation, Op Amps, Buffer Amps
Packaging
Tape & Reel (TR)
Series
microPOWER™
Product Status
Active
Amplifier Type
General Purpose
Number of Circuits
2
Output Type
Rail-to-Rail
Slew Rate
0.01V/µs
Gain Bandwidth Product
35 kHz
Current - Input Bias
20 nA
Voltage - Input Offset
100 µV
Current - Supply
27µA (x2 Channels)
Current - Output / Channel
50 mA
Voltage - Supply Span (Min)
2.7 V
Voltage - Supply Span (Max)
36 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SOIC
Base Product Number
OPA2251
Datasheet & Documents
Manufacturer Product Page
OPA2251UA/2K5 Specifications
HTML Datasheet
OPA2251UA/2K5-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.33.0001
Additional Information
Other Names
296-46149-6
OPA2251UA/2K5-DG
296-46149-1
296-46149-2
OPA2251UA/2K5-NDR
Standard Package
2,500
Alternative Parts
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MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
Leur gestion logistique irréprochable garantit une disponibilité constante des produits.
de desembre 02, 2025
The careful packaging ensures that items reach me without any issues or damage.
de desembre 02, 2025
The staff was genuinely helpful and attentive, making me feel appreciated as a customer.
de desembre 02, 2025
Great prices offered on a wide range of electronics, very economical.
de desembre 02, 2025
Thanks to their efficient shipping, I received my order much sooner than anticipated.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the OPA2251UA/2K5 in low-power sensor signal conditioning circuits with tight bandwidth requirements?
When designing with the OPA2251UA/2K5 in low-power sensor applications, a key risk is its limited 35 kHz gain bandwidth product and slow 0.01V/µs slew rate, which may distort faster signal transients or limit performance in systems expecting higher dynamic response. Engineers should verify that the total signal bandwidth—including modulation or step changes—stays well below 35 kHz. To mitigate risk, use the OPA2251UA/2K5 only in DC or low-frequency applications (e.g., strain gauges, temperature sensors) and simulate closed-loop stability under actual load and PCB parasitic conditions. Its rail-to-rail output and 27µA/channel supply current make it ideal for battery-powered systems where speed is not critical.
Can the OPA2251UA/2K5 replace the AD8642ARZ-REEL7 in a dual-channel precision amplifier circuit without affecting noise and thermal stability?
Replacing the AD8642ARZ-REEL7 with the OPA2251UA/2K5 requires careful evaluation: while both are dual, rail-to-rail amplifiers, the OPA2251UA/2K5 has lower gain bandwidth (35 kHz vs. 1 MHz) and higher input bias current (20 nA vs. 1 pA), increasing the risk of noise injection and thermal drift in high-impedance sensor interfaces. The OPA2251UA/2K5 is better suited for low-bandwidth, ultra-low power applications where the AD8642’s performance would be over-specified. If replacing, ensure signal frequencies are <10 kHz, guard traces are used for leakage control, and DC accuracy is verified over temperature due to the OPA2251UA/2K5’s higher bias current sensitivity.
How does the OPA2251UA/2K5 perform in industrial environments near the upper limit of its 85°C operating temperature, and what reliability concerns should be addressed?
The OPA2251UA/2K5 is rated for operation up to 85°C, but designers must account for derating and long-term reliability in sustained high-temperature environments. At elevated temperatures, input offset voltage drift and input bias current can increase, potentially degrading DC accuracy in precision circuits. To ensure reliability, avoid placing the OPA2251UA/2K5 near heat sources, use thermal vias to dissipate PCB heat, and validate performance over temperature in worst-case conditions. Also, consider its MSL 3 rating—bake the device if exposed to >60% RH before soldering to prevent popcorning during reflow.
What are the critical PCB layout considerations for maintaining stability and minimizing leakage in high-impedance applications using the OPA2251UA/2K5?
For high-impedance applications with the OPA2251UA/2K5, PCB leakage currents can dominate input errors due to its 20 nA input bias current. Use guard rings around input traces, routed to a low-impedance node at common-mode voltage, to shunt leakage away. Keep input paths short, avoid flux residues (use no-clean or clean thoroughly), and consider placing a solder mask slit under high-resistance traces. Additionally, ensure power supply decoupling with a 100 nF ceramic capacitor close to each supply pin to prevent oscillation, especially given its microPOWER™ low-current operation and potential for supply impedance coupling.
Is the OPA2251UA/2K5 a viable drop-in replacement for the LT1632CS8#TRPBF in dual micro-power comparators or amplifier stages in 3V battery-powered systems?
The OPA2251UA/2K5 can replace the LT1632CS8#TRPBF in dual amplifier stages of 3V battery-powered systems, but not as a comparator drop-in due to architectural differences. While both support 2.7V to 36V supplies and offer micro-power operation, the LT1632 is optimized for comparator use with faster response. The OPA2251UA/2K5’s 35 kHz GBW and 0.01V/µs slew rate make it unsuitable for fast comparison tasks. Use it only in linear amplification roles—e.g., amplifying sensor outputs—where low quiescent current (27µA per channel) and rail-to-rail output are critical. Verify loop stability and add hysteresis externally if configuring in open-loop scenarios.
Quality Assurance (QC)
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OPA2251UA/2K5 CAD Models
Texas Instruments OPA2251UA/2K5 PCB symbols & footprints
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