AD4852BCPZ - 20-Bit 250kSPS 4-Ch DAS | Analog Devices
부품 번호: AD4852BCPZ ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $26.98 | $26.98 |
| 10 | $24.28 | $242.80 |
| 100 | $21.58 | $2,158.00 |
| 500 | $19.89 | $9,945.00 |
| 1,000 | $18.19 | $18,190.00 |
AD4852BCPZ 개요
A data acquisition system (DAS) is a complete signal chain that conditions, samples, and converts analog signals into digital data. The AD4852 integrates the analog front-end, ADC, and reference, simplifying design and reducing component count. It sits within the hierarchy: DAS -> ADC -> data converter -> mixed-signal IC -> semiconductor. This integration is critical for high-channel-count systems where board space and power are at a premium.
Key features include ±75pA typical input leakage at 25°C, full-scale input step settling time of less than 300ns, and an integrated 4.096V reference. The differential inputs with wide common-mode range allow direct connection to sensors and transducers without external conditioning. The device also features a flexible digital interface supporting SPI and daisy-chain modes, enabling multiple devices to be cascaded for higher channel counts.
Technically, the AD4852 uses a successive approximation register (SAR) architecture with internal buffering, eliminating the need for external driver amplifiers. The integrated reference buffer ensures stable and accurate conversions over temperature. The device includes a temperature sensor and a 1.024V output for system diagnostics. Its power dissipation scales with throughput, making it suitable for battery-powered and thermal-constrained applications.
Typical applications include industrial automation, motor control, power line monitoring, and multi-phase energy metering. The simultaneous sampling capability is essential for applications requiring phase-accurate measurements across multiple channels, such as three-phase power monitoring and vibration analysis. The wide common-mode input range and high input impedance simplify sensor interfacing.
When designing with the AD4852, ensure adequate decoupling on the AVDD and DVDD supplies, and use the integrated reference buffer to drive the reference input. The device supports a 1.8V to 5V digital interface, allowing direct connection to modern microcontrollers and FPGAs. For optimal performance, follow the layout guidelines in the datasheet, including a solid ground plane and minimal trace lengths on the analog inputs.
드롭인 대체품: AD4852BCPZ — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
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대체품 요청AD4852BCPZ 최대 정격 & 전기적 특성
| 분해능 | 20 bits |
| Number of Channels | 4 |
| 샘플링 속도 | 250 kSPS per channel |
| Input Type | Differential |
| Input Leakage Current | ±75 pA typical at 25°C |
| Settling Time | < 300 ns (full-scale step) |
| 기준 전압 | 4.096 V (internal) |
| Power Dissipation | 36 mW per channel at 250 kSPS |
| 공급 전압 | 5 V (low voltage) |
| Digital Interface | SPI, daisy-chain |
| 패키지 | 64-lead LFCSP |
| Integrated Reference | Yes (4.096 V) |
| Integrated Supply Decoupling | Yes |
| RoHS 상태 | Compliant |
AD4852BCPZ 핀 구성
| 핀 1 | AVDD — Analog power supply |
| 핀 2 | AIN0+ — Positive analog input channel 0 |
| 핀 3 | AIN0- — Negative analog input channel 0 |
| 핀 4 | AIN1+ — Positive analog input channel 1 |
| 핀 5 | AIN1- — Negative analog input channel 1 |
| 핀 6 | AIN2+ — Positive analog input channel 2 |
| 핀 7 | AIN2- — Negative analog input channel 2 |
| 핀 8 | AIN3+ — Positive analog input channel 3 |
| 핀 9 | AIN3- — Negative analog input channel 3 |
| 핀 10 | REF — Reference input/output |
| 핀 11 | GND — Ground |
| 핀 12 | DVDD — Digital power supply |
일반적인 애플리케이션
AD4852BCPZ 적합 용도: 6 애플리케이션s: Industrial Automation, Motor Control, Power Line Monitoring, Multi-Phase Energy Metering, Vibration Analysis, Test and Measurement.
Industrial Automation
The AD4852BCPZ's 20-bit resolution and 250kSPS per channel enable precise, simultaneous sampling of multiple analog signals in industrial control systems. Its differential inputs with wide common-mode range reject noise in harsh factory environments. The integrated reference and buffers reduce external component count, simplifying design. With 36mW per channel, it suits power-sensitive PLC and process control modules. The SPI interface allows easy connection to industrial microcontrollers, and the daisy-chain capability supports multi-device synchronization for larger channel counts.
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Motor Control
In motor control, the AD4852BCPZ provides simultaneous sampling of phase currents and voltages, essential for accurate vector control. Its 20-bit resolution captures fine current details, improving torque ripple and efficiency. The fast settling time (<300ns) ensures accurate sampling during PWM switching transients. The integrated reference and buffers simplify the analog front-end, reducing board space. Operating from a 5V supply, it easily interfaces with motor control DSPs or FPGAs via SPI. The wide common-mode input range allows direct connection to shunt resistors and sensor bridges.
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Power Line Monitoring
The AD4852BCPZ is ideal for power line monitoring, where simultaneous sampling of voltage and current across multiple phases is critical for accurate power quality analysis. Its 20-bit resolution provides high dynamic range to measure small signals in the presence of large line voltages. The differential inputs with wide common-mode range handle high-voltage sensing via external dividers or CTs. The integrated reference ensures stable measurements over temperature. With 250kSPS per channel, it can capture harmonics up to the 50th order. The SPI interface enables easy integration with metering SoCs.
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Multi-Phase Energy Metering
For multi-phase energy metering, the AD4852BCPZ provides simultaneous sampling of all phases, ensuring accurate phase angle measurements. Its 20-bit resolution enables precise energy calculation even at low currents. The integrated reference and buffers reduce external component count, making it suitable for compact meter designs. The device's low power dissipation (36mW per channel) is beneficial for always-on metering applications. The SPI interface with daisy-chain support allows multiple AD4852s to be cascaded for more channels. The wide common-mode input range simplifies connection to current transformers and voltage dividers.
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Vibration Analysis
The AD4852BCPZ's simultaneous sampling and 20-bit resolution make it suitable for multi-axis vibration analysis. It can capture high-frequency vibration signals with low noise, enabling early fault detection in rotating machinery. The differential inputs reject common-mode noise from long sensor cables. The fast settling time ensures accurate sampling of transient events. With 250kSPS per channel, it can capture vibration frequencies up to 125kHz (Nyquist). The integrated reference and buffers simplify the signal chain, reducing board space in portable vibration analyzers. The SPI interface allows easy connection to DSPs for real-time FFT processing.
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Test and Measurement
In test and measurement equipment, the AD4852BCPZ provides high-resolution, simultaneous sampling for multi-channel data acquisition. Its 20-bit resolution and 250kSPS per channel enable accurate capture of fast transients. The integrated reference and buffers reduce external component count, making it ideal for compact instruments. The device's low power dissipation is beneficial for portable equipment. The SPI interface with daisy-chain support allows easy expansion to more channels. The wide common-mode input range and high input impedance simplify connection to various sensors and signal sources.
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추천 제품 요약
엔지니어링 참조 데이터: AD4852BCPZ — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | AD4852BBCZ | AD7384-4BCPZ | AD7383-4BCPZ | AD7606BSTZ |
|---|---|---|---|---|---|
| Package | 64-lead LFCSP | 64-BGA (7x7) | LFCSP | LFCSP | LQFP-64 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 20 bits | 20 bits | 16 bits | 16 bits | 16 bits |
| Number of Channels | 4 | 4 | 4 | 4 | 8 |
| Sampling Rate | 250 kSPS | 250 kSPS | 4 MSPS | 4 MSPS | 200 kSPS |
| Input Type | Differential | Differential | Differential | Differential | Differential |
| Integrated Reference | Yes (4.096V) | Yes (4.096V) | Yes (2.5V) | Yes (2.5V) | Yes (2.5V) |
| Power Dissipation | 36 mW/channel | 36 mW/channel | 38 mW/channel | 38 mW/channel | 100 mW/channel |
주요 차별점
- 20-bit resolution with simultaneous sampling (vs AD7384-4BCPZ)
- Integrated reference and buffers (vs AD7606BSTZ)
- Lower power dissipation (vs AD7606BSTZ)
설계 노트
The AD4852BCPZ operates from a 5V supply. Use separate analog (AVDD) and digital (DVDD) supplies to minimize digital noise coupling. Place 0.1uF and 10uF decoupling capacitors close to each supply pin. The integrated supply decoupling capacitors help, but external capacitors are still required for optimal performance. Refer to the datasheet's power supply recommendations.
For best performance, use a solid ground plane and minimize trace lengths on analog inputs. Keep analog input traces away from digital signals to reduce crosstalk. Use differential routing for the analog inputs to maintain common-mode rejection. Follow the layout guidelines in the AD4852 datasheet, including proper placement of decoupling capacitors and reference bypassing.
Ensure the reference input is properly bypassed with a 10uF capacitor. Do not exceed the absolute maximum ratings on the analog inputs. The device supports a 1.8V to 5V digital interface; ensure the host logic levels are compatible. For daisy-chain operation, configure the SPI correctly to avoid data corruption. Verify the power-up sequence as recommended in the datasheet.
규정 준수 정보
RoHS compliant per Analog Devices product page. Other compliance data not specified in provided data.
