AD8513ARZ - Quad Precision Low Noise JFET Op Amp | Analog Devices
N.º da peça: AD8513ARZ ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $3.5 | $3,50 |
| 10 | $3.15 | $31,50 |
| 100 | $2.8 | $280,00 |
| 500 | $2.5 | $1.250,00 |
| 1.000 | $2.25 | $2.250,00 |
AD8513ARZ Visão geral
A JFET-input operational amplifier is a type of op amp that uses junction field-effect transistors at its input stage, providing very high input impedance and extremely low input bias current. This makes JFET op amps particularly suited for applications where the source impedance is high, such as photodiode amplifiers, pH probes, and high-impedance sensors. The AD8513 belongs to the precision amplifier category, which emphasizes low offset voltage, low drift, and low noise for accurate signal processing.
Key features of the AD8513ARZ include a fast settling time of 500 ns to 0.1%, a maximum offset voltage of 400 µV, and a low input bias current of 1 pA. The device also offers a wide bandwidth of 8 MHz and a slew rate of 20 V/µs, enabling it to handle fast signals while maintaining precision. The low noise performance, with input voltage noise of 8 nV/√Hz, ensures minimal signal degradation in sensitive applications.
Technically, the AD8513 uses a precision JFET input stage combined with a bipolar output stage, achieving a good balance between input impedance and output drive capability. The amplifier is designed for single or dual supply operation, and its output can swing close to the rails, maximizing dynamic range. The device is fully specified over the industrial temperature range of -40°C to +125°C, ensuring reliable operation in harsh environments.
Typical applications include precision data acquisition systems, medical instrumentation, audio preamplifiers, and active filters. The low input bias current and low noise make it particularly suitable for high-impedance sensor interfaces, such as photodiode and piezoelectric sensors. The quad configuration allows multiple channels to be processed in a single package, saving board space and cost.
When designing with the AD8513ARZ, it is important to provide adequate power supply decoupling with 0.1 µF ceramic capacitors close to the supply pins. Additionally, for high-impedance sources, a guard ring around the input pins can help reduce leakage currents and maintain accuracy.
Alternativas drop-in para AD8513ARZ — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
AD8513ARZ-REEL7
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
OPA4140AIDR
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
LMC6484IMX
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
AD8513ARZ Classificações máximas e características elétricas
| Amplifier Type | J-FET |
| Number of Circuits | 4 |
| Encapsulamento | 14-SOIC |
| Supply Voltage Range | ±5 V to ±15 V |
| Offset Voltage (max) | 400 µV |
| Input Bias Current | 1 pA |
| Input Voltage Noise | 8 nV/√Hz |
| Settling Time | 500 ns to 0.1% |
| Bandwidth | 8 MHz |
| Slew Rate | 20 V/µs |
| Faixa de temperatura de operação | -40°C to +125°C |
| Tipo de montagem | Surface Mount |
| Status RoHS | Compliant |
| Tipo de saída | Rail-to-Rail |
| Input Type | JFET |
Configuração de pinos do AD8513ARZ
| Pino 1 | OUT A — Output of amplifier A |
| Pino 2 | -IN A — Inverting input of amplifier A |
| Pino 3 | +IN A — Non-inverting input of amplifier A |
| Pino 4 | V+ — Positive supply |
| Pino 5 | +IN B — Non-inverting input of amplifier B |
| Pino 6 | -IN B — Inverting input of amplifier B |
| Pino 7 | OUT B — Output of amplifier B |
| Pino 8 | OUT C — Output of amplifier C |
| Pino 9 | -IN C — Inverting input of amplifier C |
| Pino 10 | +IN C — Non-inverting input of amplifier C |
| Pino 11 | V- — Negative supply |
| Pino 12 | +IN D — Non-inverting input of amplifier D |
| Pino 13 | -IN D — Inverting input of amplifier D |
| Pino 14 | OUT D — Output of amplifier D |
Aplicações típicas
AD8513ARZ é adequado para 6 aplicaçãos: Precision Data Acquisition Systems, Medical Instrumentation, Audio Preamplifiers, Active Filters, Photodiode Amplifiers, Sensor Signal Conditioning.
Precision Data Acquisition Systems
The AD8513ARZ is ideal for precision data acquisition systems due to its low offset voltage (400 µV max), low input bias current (1 pA), and fast settling time (500 ns to 0.1%). These parameters ensure accurate signal conditioning for multi-channel ADC inputs. The quad configuration allows four channels to be processed in a single package, reducing board space and cost. Its wide bandwidth (8 MHz) supports high-speed sampling without compromising accuracy. The low noise (8 nV/√Hz) minimizes signal degradation, making it suitable for high-resolution ADCs. According to the datasheet, the device operates over the industrial temperature range, ensuring reliable performance in demanding environments.
Recomendado
Medical Instrumentation
In medical instrumentation, the AD8513ARZ provides the low noise and low bias current required for accurate biopotential measurements, such as ECG and EEG. Its input bias current of 1 pA minimizes errors when interfacing with high-impedance electrodes. The low offset voltage (400 µV) ensures DC accuracy, while the wide bandwidth (8 MHz) supports fast signal processing. The quad configuration enables multi-channel monitoring in a compact footprint. The device's industrial temperature range (-40°C to +125°C) ensures reliability in clinical environments. According to the datasheet, the low noise (8 nV/√Hz) is critical for detecting small physiological signals.
Recomendado
Audio Preamplifiers
The AD8513ARZ is well-suited for audio preamplifiers due to its low noise (8 nV/√Hz) and low distortion. Its wide bandwidth (8 MHz) and high slew rate (20 V/µs) ensure accurate reproduction of audio signals. The low input bias current (1 pA) makes it compatible with high-impedance sources like electric guitars and condenser microphones. The quad configuration allows multiple audio channels to be processed in a single package, saving space in mixing consoles and audio interfaces. The device operates from ±5 V to ±15 V supplies, providing headroom for audio signals. According to the datasheet, the low offset voltage (400 µV) minimizes DC offset in the audio path.
Recomendado
Active Filters
The AD8513ARZ is ideal for active filter designs due to its wide bandwidth (8 MHz) and high slew rate (20 V/µs), which allow it to handle high-frequency signals without distortion. Its low offset voltage (400 µV) and low noise (8 nV/√Hz) ensure accurate filter response. The quad configuration enables multi-stage filters in a single package, reducing component count. The device's low input bias current (1 pA) is beneficial for high-impedance filter networks. According to the datasheet, the fast settling time (500 ns) is advantageous for switched-capacitor filters. The industrial temperature range ensures stable performance in various environments.
Recomendado
Photodiode Amplifiers
The AD8513ARZ is excellent for photodiode amplifiers due to its extremely low input bias current (1 pA), which minimizes leakage current errors. Its low noise (8 nV/√Hz) ensures accurate detection of small photocurrents. The wide bandwidth (8 MHz) supports high-speed optical communication. The quad configuration allows multiple photodiode channels to be processed in one package, ideal for array detectors. The device operates from ±5 V to ±15 V, providing flexibility in supply design. According to the datasheet, the low offset voltage (400 µV) reduces DC errors in the transimpedance stage.
Recomendado
Sensor Signal Conditioning
The AD8513ARZ is ideal for sensor signal conditioning due to its low input bias current (1 pA) and low offset voltage (400 µV), which are critical for high-impedance sensors like piezoelectric and pH probes. Its low noise (8 nV/√Hz) ensures accurate measurement of small signals. The wide bandwidth (8 MHz) supports dynamic sensor signals. The quad configuration allows multiple sensors to be conditioned in a single package, saving space. The device's industrial temperature range (-40°C to +125°C) ensures reliable operation in harsh environments. According to the datasheet, the fast settling time (500 ns) is beneficial for multiplexed sensor systems.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para AD8513ARZ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | AD8513ARZ-REEL7 | OPA4140AIDR | LMC6484IMX |
|---|---|---|---|---|
| Package | 14-SOIC | 14-SOIC | 14-SOIC | 14-SOIC |
| Brand | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments |
| Number of Circuits | 4 | 4 | 4 | 4 |
| Supply Voltage Range | ±5 V to ±15 V | ±5 V to ±15 V | ±4.5 V to ±18 V | 3 V to 15 V |
| Offset Voltage (max) | 400 µV | 400 µV | 120 µV | 3 mV |
| Input Bias Current | 1 pA | 1 pA | 0.5 pA | 20 fA |
| Bandwidth | 8 MHz | 8 MHz | 11 MHz | 1.5 MHz |
| Slew Rate | 20 V/µs | 20 V/µs | 20 V/µs | 1.3 V/µs |
Principais diferenciais
- Low input bias current of 1 pA (vs OPA4140AIDR)
- Wide supply voltage range (vs LMC6484IMX)
- Higher bandwidth (vs LMC6484IMX)
Notas de projeto
Provide adequate power supply decoupling with 0.1 µF ceramic capacitors placed close to the V+ and V- pins. For high-frequency noise, add a 10 µF tantalum capacitor in parallel. This is critical for maintaining the low noise performance of the AD8513ARZ, as power supply noise can couple into the signal path.
For high-impedance sources, use a guard ring around the input pins to reduce leakage currents. This is especially important for photodiode and pH probe applications where input bias current is critical. The guard ring should be driven by a low-impedance source at the same potential as the input pins.
Avoid exceeding the absolute maximum supply voltage of ±18 V. Also, ensure that the input common-mode voltage does not exceed the supply rails. The AD8513ARZ is not a rail-to-rail input op amp, so input signals must stay within the specified common-mode range to avoid distortion.
Informações de conformidade
RoHS compliant per distributor listings. No AEC-Q100 qualification indicated.
