Part A
OPA552UA
Texas Instruments
- Lifecycle
- Active
- Stock
- 6960 PCS
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Replacement verdict
Compatible functional replacement candidate
The OPA551UAG4 is a viable functional replacement candidate for the OPA552UA in most high-voltage, high-current op-amp applications, provided the designer validates the higher quiescent current and reduced bandwidth against the target circuit requirements.
Package Type
High match
Pin Configuration
High match
Supply Current
Validation required
Gain Bandwidth Product
Validation required
Parts at a glance
Part B
OPA551UAG4
Texas Instruments
- Lifecycle
- Active
- Stock
- 6197 PCS
- Package
- SOIC-8
- Series
- Linear - Amplificadores - Instrumentação, OP Amps, Buffer Amps
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | OPA552UA | OPA551UAG4 | Why it matters |
|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Same manufacturer ensures consistent process technology and quality standards. |
| Amplifier Type | Voltage Feedback | Voltage Feedback | Both are voltage-feedback op amps, so the basic feedback topology and compensation behavior are compatible. |
| Number of Channels | 1 | 1 | Single-channel devices are pin-compatible in single-op-amp sockets. |
| Supply Voltage Range | ±4 V to ±30 V | ±4 V to ±30 V | Identical supply range allows direct substitution in the same power rails. |
| Gain Bandwidth Product | 12 MHz | 3 MHz | Higher GBW in OPA552UA supports faster signal processing; OPA551UAG4 is slower and may limit high-frequency applications. |
| Slew Rate | 24 V/µs | 15 V/µs | Slew rate affects large-signal response; OPA552UA slews faster, which matters for pulse and transient applications. |
| Input Offset Voltage (max) | ±5 mV | ±5 mV | Similar offset voltage means comparable DC accuracy in precision circuits. |
| Quiescent Current (typ) | 7 mA | 7 mA | Same quiescent current means similar power dissipation and thermal behavior. |
| Output Current (typ) | 200 mA | 200 mA | Equal output drive capability supports similar load-driving applications. |
| Package | SOIC-8 | SOIC-8 | Same package footprint allows drop-in replacement on existing PCBs. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | OPA552UA | OPA551UAG4 |
|---|---|---|
| Supplier | - | Texas Instruments |
| Part Status | Active | Discontinued at Digi-Key |
| Amplifier Type | General Purpose | General Purpose |
| Number of Circuits | 1 | 1 |
| Slew Rate | 24V/µs | 15V/µs |
| Gain Bandwidth Product | 12 MHz | 3 MHz |
| Current - Input Bias | 20 pA | 20 pA |
| Voltage - Input Offset | 1 mV | 1 mV |
| Supply Current | 7mA | 7mA |
| Voltage - Supply Span(Min) | 8 V | 8 V |
| Voltage - Supply Span(Max) | 60 V | 60 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Current - Output / Channel | 200 mA | - |
Frequently asked questions
What are the main differences between the OPA552UA and OPA551UAG4?
The OPA552UA and OPA551UAG4 are both high-voltage, high-current operational amplifiers from Texas Instruments. The primary difference is the package: the OPA552UA is supplied in an SOIC-8 package, while the OPA551UAG4 is supplied in an SOIC-8 package with a green (RoHS-compliant) molding compound. Electrically, the OPA552UA is specified for a minimum supply voltage of ±4 V (8 V total) and has a slew rate of 24 V/µs, whereas the OPA551UAG4 is specified for a minimum supply voltage of ±4 V (8 V total) and has a slew rate of 15 V/µs. The OPA552UA also has a higher gain-bandwidth product of 12 MHz compared to 3 MHz for the OPA551UAG4.
Are the OPA552UA and OPA551UAG4 pin-compatible?
Yes, both devices are offered in the same SOIC-8 package with identical pinouts. Pin 1 is the offset null, pin 2 is the inverting input, pin 3 is the non-inverting input, pin 4 is V−, pin 5 is the offset null, pin 6 is the output, pin 7 is V+, and pin 8 is the enable/disable pin. This allows them to be used in the same PCB footprint, but electrical differences must be validated for the target design.
Can the OPA552UA and OPA551UAG4 operate from the same supply voltages?
Both devices support a wide supply range. The OPA552UA is specified for operation from ±4 V to ±30 V (8 V to 60 V total), and the OPA551UAG4 is specified for operation from ±4 V to ±30 V (8 V to 60 V total). However, the OPA552UA is optimized for higher speed, while the OPA551UAG4 is optimized for higher output current and lower quiescent current. Always verify the absolute maximum ratings and recommended operating conditions in the respective datasheets.
Which device has a higher output current capability?
The OPA551UAG4 is specified with a continuous output current of 200 mA, while the OPA552UA is specified with a continuous output current of 200 mA. Both devices feature internal current limiting and thermal shutdown protection. The OPA551UAG4 is often selected for applications requiring high output current with lower quiescent current, whereas the OPA552UA is selected for higher speed requirements.
What are the typical applications for the OPA552UA and OPA551UAG4?
Both devices are used in high-voltage, high-current applications such as piezo drivers, valve drivers, servo drivers, and power supplies. The OPA552UA is preferred for applications requiring higher slew rate and gain-bandwidth product, such as fast pulse generation and high-speed data acquisition. The OPA551UAG4 is preferred for applications requiring lower quiescent current and higher output current stability, such as portable instrumentation and battery-powered systems.
Are the OPA552UA and OPA551UAG4 RoHS compliant?
The OPA551UAG4 is explicitly identified by the "G4" suffix as a green, RoHS-compliant version. The OPA552UA is available in both standard and RoHS-compliant versions; the specific ordering part number must be checked to confirm RoHS status. Always refer to the manufacturer's product page or datasheet for the latest compliance information.
What is the quiescent current difference between the OPA552UA and OPA551UAG4?
The OPA552UA has a typical quiescent current of 7 mA per channel, while the OPA551UAG4 has a typical quiescent current of 7.5 mA per channel. Both values are specified at ±15 V supply. These differences are minor, but the OPA551UAG4 may offer slightly better efficiency in battery-powered applications where quiescent current is critical.
Can the OPA552UA and OPA551UAG4 be used interchangeably in existing designs?
Because they share the same package and pinout, they can be interchanged in many designs. However, the OPA552UA has a higher slew rate (24 V/µs vs. 15 V/µs) and higher gain-bandwidth product (12 MHz vs. 3 MHz), which may affect stability, compensation, and noise performance. The OPA551UAG4 has a lower quiescent current and is RoHS-compliant. A thorough review of the circuit's requirements and the respective datasheets is required before substitution.