OPA2277P - 10µV Precision Dual Op Amp | Texas Instruments
Teilenummer: OPA2277P ✓ AktivOPA2277P Übersicht
An operational amplifier is a voltage-controlled differential amplifier whose inverting and non-inverting inputs determine the gain and output behavior of an analog signal chain. The precision operational-amplifier category sits between general-purpose amplifiers and application-specific signal-conditioning ICs. It is part of the broader amplifier hierarchy and supports instrumentation, sensor measurement, control, conversion, and reference-buffer circuits where low offset, low drift, bias-current control, and power-supply rejection are important.
The OPA2277P’s 10 µV offset and 0.1 µV/°C drift are the principal precision specifications. These characteristics reduce output error in high-gain circuits, particularly when small sensor signals are amplified over a wide temperature range. Low bias current supports high-impedance sources, while high common-mode rejection and high power-supply rejection improve immunity to signals shared by both inputs and to disturbances originating from the supply rails.
The device contains two amplifier channels in one package. Its improved noise and wider output swing make it useful in precision integrators, low-level signal conditioners, measurement systems, and analog control loops. The low quiescent current also suits battery-operated and compact industrial equipment where each milliamp of supply demand can affect the achievable operating duration. The two-channel package reduces component count when the signal chain needs matched functional channels.
OPA2277P is offered in the 8-pin PDIP package, making it suitable for through-hole assembly and legacy industrial or instrumentation platforms that do not require a surface-mount package. Designers should preserve the polarity of the differential inputs, avoid exceeding the power-supply ratings, and provide suitable bypassing at the supply pins. Stable operation also depends on maintaining the required output-load conditions and preventing excessive output saturation.
This product summary combines the manufacturer’s device description with practical selection guidance for engineers evaluating precision signal chains. It distinguishes the OPA2277P from lead-free ordering variants, identifies the package and pin assignments, and explains where offset, drift, bias current, noise, and supply rejection matter. Current commercial availability, lead time, and a formal quote should be handled through XAIPART’s Request a Quote form rather than static pricing information.
Drop-in-Alternativen für OPA2277P – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
OPA2277PG4
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
OPA2277P Grenzwerte & elektrische Eigenschaften
| Amplifier Type | Precision operational amplifier |
| Number of Channels | 2 circuits |
| Offset Voltage | 10 µV |
| Offset Voltage Drift | 0.1 µV/°C |
| Gehäuse | 8-pin PDIP |
| Montageart | Through-hole |
OPA2277P Pin-Konfiguration
| Pin 1 | NC — Not connected |
| Pin 2 | 1IN- — Inverting input for amplifier 1 |
| Pin 3 | 1IN+ — Non-inverting input for amplifier 1 |
| Pin 4 | V- — Negative power supply |
| Pin 5 | 2IN+ — Non-inverting input for amplifier 2 |
| Pin 6 | 2IN- — Inverting input for amplifier 2 |
| Pin 7 | 2OUT — Output for amplifier 2 |
| Pin 8 | 1OUT — Output for amplifier 1 |
Typische Anwendungen
OPA2277P ist geeignet für 6 Anwendungs: Precision Instrumentation, Precision Integrator, Low-Level Sensor Signal Conditioning, Low-Power Measurement Systems, Analog Control Loops, Precision Reference Buffering.
Precision Instrumentation
OPA2277P fits precision instrumentation because its 10 µV offset voltage and 0.1 µV/°C offset drift reduce amplified DC error in sensor and measurement circuits. The low-bias-current characteristic supports high-impedance signal sources, while high common-mode rejection and high power-supply rejection reduce errors caused by common-mode inputs and supply variation. Its dual-channel configuration can implement two coordinated functions in one 8-pin PDIP package. Engineers should still verify noise, bandwidth, input range, and output swing against the specific measurement bandwidth and temperature requirements.
Empfohlen
Precision Integrator
OPA2277P is well matched to precision integration because its 10 µV offset and 0.1 µV/°C drift limit errors that can accumulate during charge transfer on a feedback capacitor. The two amplifier channels offer flexibility for paired analog functions, while low quiescent current supports compact and battery-powered instruments. The design must preserve stable feedback operation, account for input bias current, and keep the integrator output within the amplifier’s specified swing. Component selection for the feedback capacitor should be based on leakage, dielectric behavior, and the required integration time constant.
Empfohlen
Low-Level Sensor Signal Conditioning
OPA2277P can condition low-level sensor outputs where source impedance and temperature drift make offset error important. Its low bias current limits loading on high-impedance sensors, and the 10 µV offset specification provides a defined basis for gain-error calculations. High common-mode rejection helps preserve accuracy when the sensor signal shares a large voltage with the amplifier inputs. For practical use, engineers should verify the selected package’s pin functions, supply limits, input common-mode range, and output swing before adding gain, filtering, or level-shifting stages around the device.
Empfohlen
Low-Power Measurement Systems
OPA2277P suits low-power measurement systems because the OPAx277 family combines precision operation with reduced quiescent current relative to the OP-177 reference amplifier. A dual amplifier in one package can reduce board area and component count when two precision channels are required. Low supply demand is particularly valuable in portable or field-installed equipment where the measurement electronics must operate from a limited energy budget. Power calculations should use the exact supply voltage and channel activity from the manufacturer’s operating-current tables, since overall consumption also depends on the external circuit.
Empfohlen
Analog Control Loops
OPA2277P can serve in analog control loops where DC offset and temperature drift would create a persistent control error. Its 10 µV offset specification is especially relevant in high-gain error amplifiers, while the dual-channel package can implement coordinated drive or sensing functions. High common-mode rejection and power-supply rejection support operation in systems containing switching or changing supply rails. Loop stability, output-current capability, load capacitance, and compensation must be checked against the specific topology. The manufacturer’s stability and typical-performance curves should guide compensation and output-stage design.
Empfohlen
Precision Reference Buffering
OPA2277P can buffer a low-level reference signal when the downstream circuit requires low offset, low drift, and low input bias current. The device’s dual-channel arrangement allows one channel to perform the main buffering function while the second channel supports monitoring, biasing, or another precision function. Low bias current reduces disturbance to a high-impedance reference source, and high power-supply rejection helps isolate the buffer from rail noise. The output must remain within the specified swing range, and stability with the reference network’s capacitance should be confirmed before production release.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für OPA2277P – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | OPA2277PG4 |
|---|---|---|
| Package | 8-pin PDIP | 8-pin PDIP |
| Brand | Texas Instruments | Texas Instruments |
| Amplifier Type | High-precision operational amplifier | OPA2277-family precision operational amplifier |
| Family Position | OPAx277 precision operational-amplifier family | OPA2277-family ordering variant |
| Ordering Suffix | P | PG4 |
Wichtigste Unterscheidungsmerkmale
- Very low offset for precision gain stages (vs. OPA2277PG4)
- Low thermal drift for changing environments (vs. OPA2277PG4)
- Dual precision channels in a through-hole package (vs. OPA2277PG4)
Designhinweise
Place the power-supply bypass capacitors close to the OPA2277P supply pins and route the return current directly to the device ground reference. Keep sensitive input traces short, avoid routing them beside switching nodes and high-current returns, and use a solid ground plane on the through-hole board. Because precision amplifiers can amplify both differential signal errors and supply disturbances, PCB geometry directly affects the benefit obtained from the specified common-mode and power-supply rejection.
Do not assume that low offset voltage guarantees accurate operation across the complete signal range. Input bias current, input offset current, common-mode limits, output swing, noise, and bandwidth can dominate the total error at very low signal levels or high gain. Check the application against the manufacturer’s electrical-characteristics table, preserve the correct differential-input polarity, and ensure the feedback network provides stable operation with the selected source and load impedances.
Estimate total supply consumption by multiplying the applicable per-channel operating current by the number of active channels and adding the external circuit demand, then multiplying by the supply voltage. The OPAx277 family is positioned as a low-power precision-amplifier family, but the final thermal and battery-life calculation should use the exact operating-current limits and typical values in the manufacturer datasheet. Include startup, load, and temperature effects in the worst-case assessment.
For precision integrators, characterize capacitor dielectric absorption and leakage because the amplifier’s low offset and drift cannot remove errors introduced by the feedback capacitor. Keep the summing node physically small, use a guard or driven shield when leakage is significant, and avoid routing the input node near high-impedance leakage paths. Confirm loop stability and output-swing margin over the intended signal and temperature ranges.
Compliance-Informationen
Exact compliance attributes were not stated for the OPA2277P ordering suffix. Confirm current material declarations with Texas Instruments before production release.