AD7124-4BRUZ - 24-Bit Sigma-Delta ADC | Analog Devices
部品番号: AD7124-4BRUZ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $13.6364 | $13.64 |
| 10 | $9.8485 | $98.49 |
| 100 | $8.7121 | $871.21 |
| 500 | $8.3333 | $4,166.65 |
| 1,000 | $7.9545 | $7,954.50 |
AD7124-4BRUZ 概要
An analog-to-digital converter (ADC) is a device that converts a continuous analog signal into a discrete digital representation. The AD7124-4 is a sigma-delta ADC, which uses oversampling and noise shaping to achieve high resolution and excellent noise performance. It is part of the precision ADC family, which is essential in applications requiring accurate measurement of physical quantities such as temperature, pressure, and strain. The AD7124-4 integrates key signal chain components, including a PGA, reference, and excitation current sources, reducing external component count and simplifying design.
Key features of the AD7124-4BRUZ include a 24-bit resolution, low noise performance, and low power consumption. It offers a maximum output data rate of 19.2 kSPS, with programmable gain from 1 to 128. The device includes an internal band gap reference with low drift, and also accepts an external differential reference. It supports SPI communication, and includes diagnostic functions such as open-circuit detection and overvoltage monitoring. The AD7124-4 is recommended for new designs, with a 1ku list price starting from $6.55.
The AD7124-4 uses a sigma-delta architecture with a digital filter, providing high resolution and rejection of out-of-band noise. The PGA allows direct connection of low-level sensors, such as thermocouples and strain gauges, without additional amplification. The device operates from a 2.7V to 3.6V analog supply and a 1.8V to 3.6V digital supply, with a typical current consumption of 1.2 mA in full power mode. The internal reference has a typical drift of 10 ppm/°C, ensuring stable measurements over temperature.
Typical applications include temperature measurement with RTDs and thermocouples, pressure measurement with bridge sensors, and industrial process control. The AD7124-4 is also suitable for battery-powered portable instruments due to its low power consumption. Its integrated excitation current sources simplify RTD and thermocouple biasing, while the PGA and reference reduce external component count.
When designing with the AD7124-4, ensure proper decoupling of the AVDD and DVDD supplies, and place the reference decoupling capacitor close to the REF pin. The SPI interface should be isolated if the ADC is used in noisy industrial environments. The device supports both internal and external references, and the choice depends on the required accuracy and temperature drift.
ドロップイン代替品: AD7124-4BRUZ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: AD7124-4BRUZ （同一形状・フットプリント） — 相違点: Input Type, Number of Channels, Operating Temperature Range, Package, Sampling Rate.
クイック比較ツール — 並列比較する代替部品を選択:
AD7124-4BRUZ-RL7
✓ 在庫あり
$7.9545 / 個
データシートを見る →AD7124-4BBCPZ-RL7
✓ 在庫あり
$28.6364 / 個
データシートを見る →AD7190BRUZ
✓ 在庫あり
$7.6364 / 個
データシートを見る →AD7799BRUZ
✓ 在庫あり
$5.41 / 個
データシートを見る →AD7124-8BRUZ
📋 参考代替品（カタログ未掲載）
AD7124-4BRUZ 最大定格＆電気的特性
| 分解能 | 24 Bit |
| Number of Channels | 4 Differential or 7 Single-Ended/Pseudo Differential |
| Input Type | Differential, Single-Ended, Pseudo Differential |
| Data Interface | SPI |
| Architecture | Sigma-Delta |
| サンプリングレート | 19.2 kSPS (Maximum) |
| Programmable Gain | 1 to 128 |
| Analog Supply Voltage | 2.7 V to 3.6 V |
| Digital Supply Voltage | 1.8 V to 3.6 V |
| Typical Current Consumption | 1.2 mA (Full Power Mode) |
| Internal Reference Drift | 10 ppm/°C (Typical) |
| 動作温度範囲 | -40°C to +125°C |
| パッケージ | 24-Lead TSSOP |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
AD7124-4BRUZ ピン構成
| ピン 1 | SCLK — Serial Clock Input |
| ピン 2 | DIN — Serial Data Input |
| ピン 3 | DOUT/RDY — Serial Data Output / Ready |
| ピン 4 | CS — Chip Select |
| ピン 5 | DVDD — Digital Supply Voltage |
| ピン 6 | GND — Ground |
| ピン 7 | AVDD — Analog Supply Voltage |
| ピン 8 | REFIN1+ — Positive Reference Input 1 |
| ピン 9 | REFIN1- — Negative Reference Input 1 |
| ピン 10 | REFIN2+ — Positive Reference Input 2 |
| ピン 11 | REFIN2- — Negative Reference Input 2 |
| ピン 12 | AIN0 — Analog Input 0 |
| ピン 13 | AIN1 — Analog Input 1 |
| ピン 14 | AIN2 — Analog Input 2 |
| ピン 15 | AIN3 — Analog Input 3 |
| ピン 16 | AIN4 — Analog Input 4 |
| ピン 17 | AIN5 — Analog Input 5 |
| ピン 18 | AIN6 — Analog Input 6 |
| ピン 19 | VBIAS — Bias Voltage Output |
| ピン 20 | IOUT0 — Excitation Current Output 0 |
| ピン 21 | IOUT1 — Excitation Current Output 1 |
| ピン 22 | P0 — General Purpose Output 0 |
| ピン 23 | P1 — General Purpose Output 1 |
| ピン 24 | SYNC — Synchronization Input |
主な用途
AD7124-4BRUZ の用途: 6 件s: Temperature Measurement with RTDs, Pressure Measurement with Bridge Sensors, Industrial Process Control, Battery-Powered Portable Instruments, Weigh Scale and Strain Gauge, Data Acquisition Systems.
Temperature Measurement with RTDs
The AD7124-4BRUZ is ideal for RTD temperature measurement due to its integrated excitation current sources and high resolution. It provides 24-bit resolution and programmable gain up to 128, allowing direct connection to RTDs without external amplification. The internal reference with low drift ensures accurate temperature readings over a wide range. The device's low power consumption makes it suitable for battery-powered temperature loggers. With SPI interface, it easily interfaces with microcontrollers for data acquisition and control.
おすすめ
Pressure Measurement with Bridge Sensors
The AD7124-4BRUZ is well-suited for pressure measurement using bridge sensors. Its PGA allows direct connection to low-level bridge outputs, and the 24-bit resolution provides high accuracy. The device's low noise performance ensures precise pressure readings even in noisy industrial environments. The integrated reference and excitation current sources simplify the signal chain, reducing external components. The SPI interface enables easy integration with microcontrollers for real-time monitoring and control.
おすすめ
Industrial Process Control
In industrial process control, the AD7124-4BRUZ provides high-resolution, low-noise analog-to-digital conversion for monitoring and control loops. Its 24-bit resolution and programmable gain allow accurate measurement of process variables such as temperature, pressure, and flow. The device's low power consumption is beneficial for field instruments powered by loop power. The SPI interface supports isolated communication in noisy environments. The integrated diagnostics, such as open-circuit detection, enhance system reliability.
おすすめ
Battery-Powered Portable Instruments
The AD7124-4BRUZ is ideal for battery-powered portable instruments due to its low power consumption of 1.2 mA typical. It operates from a 2.7V to 3.6V supply, making it compatible with single-cell lithium-ion batteries. The device's integrated PGA and reference reduce external component count, saving board space and power. The 24-bit resolution ensures accurate measurements for portable data loggers and handheld meters. The SPI interface allows low-power microcontrollers to interface efficiently.
おすすめ
Weigh Scale and Strain Gauge
The AD7124-4BRUZ is well-suited for weigh scale and strain gauge applications. Its high resolution and low noise enable precise weight measurements. The PGA allows direct connection to strain gauge bridges, and the integrated excitation current sources simplify sensor biasing. The device's low drift internal reference ensures stable measurements over temperature. The SPI interface facilitates communication with microcontrollers for display and control. The low power consumption is beneficial for portable scales.
おすすめ
Data Acquisition Systems
The AD7124-4BRUZ is a versatile ADC for data acquisition systems, offering 4 differential or 7 single-ended inputs. Its 24-bit resolution and programmable gain allow accurate digitization of various analog signals. The device's low noise and high PSRR make it suitable for precision data acquisition in industrial and laboratory settings. The SPI interface supports high-speed data transfer to microcontrollers or DSPs. The integrated reference and diagnostics reduce external components and enhance system reliability.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: AD7124-4BRUZ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | AD7124-4BRUZ-RL7 | AD7124-4BBCPZ-RL7 | AD7124-8BRUZ | AD7190BRUZ |
|---|---|---|---|---|---|
| Package | 24-Lead TSSOP | 24-Lead TSSOP | 32-Lead LFCSP | 24-Lead TSSOP | 24-Lead TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 24 Bit | 24 Bit | 24 Bit | 24 Bit | 24 Bit |
| Number of Channels | 4 Differential / 7 Single-Ended | 4 Differential / 7 Single-Ended | 4 Differential / 7 Single-Ended | 8 Differential / 15 Single-Ended | 2 Differential / 4 Single-Ended |
| Maximum Output Data Rate | 19.2 kSPS | 19.2 kSPS | 19.2 kSPS | 19.2 kSPS | 4.8 kSPS |
| Programmable Gain | 1 to 128 | 1 to 128 | 1 to 128 | 1 to 128 | 1 to 128 |
| Typical Current Consumption | 1.2 mA | 1.2 mA | 1.2 mA | 1.2 mA | 6.5 mA |
| Integrated Excitation Current Sources | Yes | Yes | Yes | Yes | No |
主な差別化要因
- Integrated excitation current sources （vs AD7190BRUZ)
- Lower power consumption （vs AD7190BRUZ)
- More input channels （vs AD7190BRUZ)
設計ノート
Ensure proper decoupling of AVDD and DVDD supplies. Place 0.1uF and 10uF capacitors close to the AVDD and DVDD pins. The analog and digital supplies should be separated to minimize noise coupling. Use a low-noise LDO for AVDD to maintain ADC performance.
Place the reference decoupling capacitor close to the REFIN pins. Use a 10uF ceramic capacitor for the internal reference. For external reference, use a low-drift reference and place its decoupling capacitor close to the REFIN pins. Keep analog input traces short and shielded to reduce noise pickup.
Avoid exceeding the absolute maximum ratings for AVDD and DVDD. Ensure the SPI interface is isolated if used in noisy industrial environments. The SYNC pin should be tied to DVDD if not used. Do not leave unused analog inputs floating; connect them to AVDD or GND as appropriate.
コンプライアンス情報
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free per datasheet.
