OPA37GU - 63MHz Ultra-Low-Noise Precision Op Amp | TI
N.º da peça: OPA37GU ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
OPA37GU Visão geral
An operational amplifier is an analog integrated circuit that amplifies the voltage difference between its inverting and non-inverting inputs. Precision operational amplifiers add low offset, low bias current, high open-loop gain, and common-mode rejection for instrumentation, audio, sensor, and measurement systems. The OPA37 is a decompensated amplifier, so its stable operating-gain requirement must be considered when selecting feedback values.
Key verified features include 4.5 nV/√Hz maximum input noise at 1 kHz, 100 µV maximum input offset voltage, 0.4 µV/°C offset drift, 117 dB minimum open-loop gain, 100 dB minimum common-mode rejection, and 94 dB minimum power-supply rejection. The supplied product information identifies a ±4 V to ±22 V supply range and a 59 A device-level rating in distributor search data, although the exact application limits should be confirmed against the manufacturer datasheet.
OPA37 family devices use a decompensated architecture intended for higher closed-loop gain than a unity-gain-stable amplifier. The 63 MHz gain-bandwidth product and 11.9 V/µs slew rate support wideband small-signal and precision signal paths, while the low-noise specification is particularly relevant to audio and measurement front ends. Stable feedback-network design remains essential because decompensated amplifiers may require a minimum closed-loop gain.
Typical applications include professional audio equipment, low-noise microphone preamplifiers, instrumentation amplifiers, precision measurement front ends, active filters, and signal-conditioning circuits. The 8-pin SOIC package supports conventional surface-mount PCB assembly, while its low offset and noise help reduce calibration burden when the signal source is close to the input noise floor.
When laying out an OPA37GU circuit, place input, feedback, and decoupling components close to the relevant pins, maintain short ground-return paths, and verify the required minimum closed-loop gain. Use the manufacturer datasheet for complete electrical limits, compensation guidance, common-mode range, output-drive capability, and package drawings. This page combines verified source data with selection and design guidance intended to support engineering comparison rather than replace the datasheet.
Alternativas drop-in para OPA37GU — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com OPA37GU (mesmo formato e footprint) — diferindo em Operating Temperature Range, Manufacturer, Amplifier Type, Number of Circuits, Product Type.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
OPA37GU
✅ Drop-In✓ Em estoque
Consulte o preço
Ver ficha técnica →OPA37GP
✅ Drop-In✓ Em estoque
Consulte o preço
Ver ficha técnica →OPA37GU/2K5
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
OPA37GU-2K5G4
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
OPA27GU
✅ Drop-In✓ Em estoque
$3.08 / unidade
Ver ficha técnica →AD510SH
✅ Drop-In✓ Em estoque
$26.75 / unidade
Ver ficha técnica →AD5174BRMZ-10
✅ Drop-In✓ Em estoque
$2.89 / unidade
Ver ficha técnica →OPA37GU Classificações máximas e características elétricas
| Amplifier Type | Single decompensated precision operational amplifier |
| Number of Channels | 1 channel |
| Gain-Bandwidth Product | 63 MHz |
| Slew Rate | 11.9 V/µs |
| Input Noise Density | 4.5 nV/√Hz maximum at 1 kHz |
| Input Offset Voltage | 100 µV maximum |
| Input Offset Voltage Drift | 0.4 µV/°C maximum |
| Open-Loop Gain | 117 dB minimum |
| Common-Mode Rejection | 100 dB minimum |
| Power-Supply Rejection | 94 dB minimum |
| Supply Voltage Range | ±4 V to ±22 V |
| Encapsulamento | 8-pin SOIC |
| Tipo de montagem | Surface Mount |
| Faixa de temperatura de operação | -40 °C to +85 °C |
Guia de Configuração de Pinos do OPA37GU 8-pin soic
Configuração de pinos para OPA37GU (pacote 8-pin soic). Este componente analógico possui pinos de entrada, saída e alimentação. Consulte o datasheet do fabricante para configurações de offset null, compensação e pino de enable. Ideal para circuitos de condicionamento de sinal e amplificadores.
Nenhum dado detalhado de pinagem disponível para OPA37GU.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
OPA37GU é adequado para 6 aplicaçãos: Professional Audio Preamplifier, Precision Instrumentation Front End, Active Audio Filter, Low-Noise Sensor Signal Conditioning, Precision Measurement Amplifier, Precision Voltage Reference Buffer.
Professional Audio Preamplifier
OPA37GU fits low-noise professional audio preamplification because the verified data specifies 4.5 nV/√Hz maximum input noise density at 1 kHz and 11.9 V/µs slew rate. Place it in a closed-loop gain stage with feedback and compensation values selected according to the decompensated OPA37 architecture. The low-noise input stage can improve signal-to-noise ratio for microphone or line-level sources, while the 63 MHz gain-bandwidth product preserves bandwidth for transient-rich audio. Confirm output swing, load impedance, supply headroom, and stability before production; the headline bandwidth does not remove the need for correct gain configuration.
Recomendado
Precision Instrumentation Front End
OPA37GU is suitable for precision instrumentation when low offset and high rejection improve signal integrity. The verified values include 100 µV maximum input offset voltage, 0.4 µV/°C maximum offset drift, 117 dB minimum open-loop gain, and 100 dB minimum common-mode rejection. Use the amplifier in a gain stage that respects the OPA37 minimum closed-loop gain, with short input traces and a quiet reference or sensor return. The 63 MHz bandwidth provides margin for measurement bandwidth, but designers must still evaluate noise bandwidth, source impedance, input bias current, and common-mode limits with the complete manufacturer datasheet.
Recomendado
Active Audio Filter
OPA37GU can be used in active filtering where low noise and wideband signal capability are valuable. Its verified 63 MHz gain-bandwidth product and 11.9 V/µs slew rate provide dynamic range for filter stages operating above audio frequencies, while the 4.5 nV/√Hz maximum noise density at 1 kHz helps limit added circuit noise. Because the device is decompensated, choose the closed-loop gain and feedback values required by the OPA37 family rather than copying a unity-gain filter. Simulate component tolerances and verify phase margin, output drive, and supply headroom at the intended load.
Recomendado
Low-Noise Sensor Signal Conditioning
OPA37GU is appropriate for sensor signal conditioning when the sensor output is small and system noise is important. The verified specifications of 100 µV maximum input offset voltage and 0.4 µV/°C maximum drift help reduce fixed and temperature-related error, while 100 dB minimum common-mode rejection can suppress common-mode disturbances in the measurement path. Use a gain stage above the required decompensated minimum, keep sensor and amplifier grounds short, and control leakage around high-impedance inputs. Verify input bias current and common-mode behavior because those values are not provided in the supplied source data.
Recomendado
Precision Measurement Amplifier
OPA37GU can serve in precision measurement amplifiers where small differential signals must be amplified while rejecting supply and common-mode disturbances. The verified 117 dB minimum open-loop gain, 94 dB minimum power-supply rejection, and 94 dB-class supply-noise performance support accurate signal recovery, while the 63 MHz bandwidth allows higher-bandwidth instrumentation than a slow precision-only amplifier. The decompensated topology requires deliberate gain selection and stability verification. Keep input and feedback components compact, use low-noise supplies, and confirm output current and settling behavior against the complete manufacturer datasheet.
Recomendado
Precision Voltage Reference Buffer
OPA37GU can be used to buffer a precision reference when the load requires low added noise and accurate drive. Its 100 µV maximum input offset voltage, 0.4 µV/°C maximum offset drift, 94 dB minimum power-supply rejection, and high open-loop gain are useful for reducing reference-chain error. Configure the amplifier at a closed-loop gain permitted by the OPA37 decompensated architecture and confirm that the output reference current, capacitive loading, and supply range remain within the manufacturer’s limits. The source data does not provide output-current or settling-time values, so those requirements must not be assumed.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para OPA37GU — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | OPA37GU/2K5 | OPA37GU-2K5G4 | OPA27GU | AD510 |
|---|---|---|---|---|---|
| Package | 8-pin SOIC | SOIC-8 family variant | SOIC-8 family variant | SOIC-8 related family variant | SOIC-8 cross-reference candidate |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
Principais diferenciais
- Verified low-noise performance for precision audio and measurement (vs OPA27GU)
- High-bandwidth decompensated precision architecture (vs AD510)
- Precision DC error specifications (vs AD517)
Notas de projeto
OPA37GU is decompensated, so stability begins with selecting the intended closed-loop gain and a feedback network that satisfies the OPA37 family’s minimum-gain requirement. Do not design it as an unrestricted unity-gain buffer. Check phase margin across the intended noise and signal bandwidth, especially when capacitive loading is present. The verified 63 MHz gain-bandwidth product is a useful bandwidth indicator, but it does not establish stability without the correct topology.
Keep the non-inverting and inverting input paths short, particularly when source impedance is high. Place feedback resistors and compensation-related components close to the amplifier pins, use a continuous low-impedance ground return, and place supply bypass capacitance at the device supply pins. These layout practices reduce parasitic capacitance, leakage, and supply-impedance effects that can degrade a low-noise precision amplifier.
Design the power rails around the verified ±4 V to ±22 V supply range while separately checking absolute maximum limits, common-mode range, output swing, and dissipation in the manufacturer datasheet. A dual-supply notation of ±22 V describes a rail-to-rail span of 44 V, not a 44 V output capability. Use local decoupling and keep the amplifier’s supply current within the package and thermal design limits; those current and thermal figures are not included in the supplied data.
Do not approve a substitute solely because it has the same 8-pin SOIC outline. Confirm exact pin functions, decompensation or minimum-gain behavior, supply range, input common-mode range, noise, offset, bandwidth, slew rate, output drive, and temperature grade. The provided cross-reference material identifies OPA37 family socket candidates but does not supply complete verified electrical data for every candidate, so each substitution requires datasheet review and bench validation.
Informações de conformidade
The supplied verified data does not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification status for OPA37GU. These fields remain unknown rather than being inferred.