AD7390BCPZ - 12-Bit Serial DAC, 3V Supply | Analog Devices
部品番号: AD7390BCPZ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.95 | $4.95 |
| 10 | $4.5 | $45.00 |
| 100 | $3.8 | $380.00 |
| 500 | $3.2 | $1,600.00 |
| 1,000 | $2.9 | $2,900.00 |
AD7390BCPZ 概要
A digital-to-analog converter (DAC) is an electronic component that converts digital binary data into an analog voltage or current. The AD7390 is a voltage-output DAC, meaning it directly outputs a voltage proportional to the digital input code. It is part of the broader family of data converters, which also includes analog-to-digital converters (ADCs). DACs are essential in systems where digital processing must interface with the analog world, such as audio playback, motor control, and sensor calibration.
Key features of the AD7390BCPZ include 12-bit resolution, a serial interface compatible with SPI/QSPI/MICROWIRE, and a buffered output that can drive capacitive loads. The device includes a power-on reset that clears the output to zero scale, ensuring predictable startup behavior. The low supply current of less than 100 µA extends battery life in portable devices. The LFCSP package is lead-free and RoHS compliant, meeting modern environmental standards.
Technically, the AD7390 uses a resistor-string architecture with an output buffer amplifier. The serial interface allows easy connection to microcontrollers and DSPs with minimal pin count. The device supports a wide operating temperature range of -40°C to +85°C, suitable for industrial environments. The output voltage range is 0 V to VREF, where VREF can be set externally up to the supply voltage. The DAC's settling time is typically 10 µs, enabling moderate-speed applications.
Typical applications include digital gain and offset adjustment, programmable voltage references, and industrial process control. In portable instrumentation, the low power consumption is critical for extending battery life. The AD7390BCPZ is also used in automotive electronics for sensor calibration and in communication systems for bias control.
When designing with the AD7390BCPZ, ensure that the reference voltage is stable and well-decoupled to achieve full 12-bit accuracy. The serial clock should be kept clean to avoid data corruption. The output buffer can drive up to 100 pF capacitive load without oscillation, but for larger loads, an external buffer may be required.
ドロップイン代替品: AD7390BCPZ — 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: AD7390BCPZ （同一形状・フットプリント） — 相違点: Package, Resolution, Settling Time, Interface Type, Power-Down Current.
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AD7391BCPZ
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$2.88 / 個
データシートを見る →AD7390BCPZ 最大定格＆電気的特性
| 分解能 | 12 bits |
| Number of Channels | 1 |
| Supply Voltage Range | +2.7 V to +5.5 V |
| 電源電流 | < 100 µA |
| 出力タイプ | Voltage - Buffered |
| 出力電圧範囲 | 0 V to VREF |
| Settling Time | 10 µs (typical) |
| インターフェース | SPI, QSPI, MICROWIRE |
| Reference Type | External |
| 動作温度範囲 | -40°C to +85°C |
| パッケージ | 8-Lead LFCSP (3mm x 3mm) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
| Lead-Free | Yes |
| Power-On Reset | Output to Zero Scale |
AD7390BCPZ ピン構成
| ピン 1 | VOUT — Analog output voltage |
| ピン 2 | GND — Ground |
| ピン 3 | VDD — Positive supply voltage |
| ピン 4 | VREF — Reference voltage input |
| ピン 5 | SYNC — Active low chip select |
| ピン 6 | SCLK — Serial clock input |
| ピン 7 | SDIN — Serial data input |
| ピン 8 | NC — No connect |
主な用途
AD7390BCPZ の用途: 6 件s: Portable Instrumentation, Industrial Process Control, Automotive Electronics, Communication Systems, Medical Devices, Test and Measurement.
Portable Instrumentation
The AD7390BCPZ's ultra-low supply current of less than 100 µA and wide supply range of +2.7 V to +5.5 V make it ideal for battery-powered instruments. It provides precise analog output for sensor calibration and offset adjustment while extending battery life. The small 8-lead LFCSP package saves board space in handheld devices. Its serial interface minimizes pin count, simplifying connection to low-power microcontrollers.
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Industrial Process Control
In industrial environments, the AD7390BCPZ provides accurate analog outputs for controlling valves, actuators, and setpoints. Its industrial temperature range of -40°C to +85°C ensures reliable operation in harsh conditions. The 12-bit resolution allows fine adjustments, and the serial interface enables easy integration with PLCs and industrial microcontrollers. The low power consumption reduces heat generation in control cabinets.
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Automotive Electronics
The AD7390BCPZ is suitable for automotive applications such as sensor calibration and battery management systems. Its wide supply voltage range accommodates automotive power rails that vary with load and temperature. The low power consumption is beneficial for always-on modules. The device's small footprint and serial interface simplify PCB design in space-constrained automotive ECUs.
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Communication Systems
In communication equipment, the AD7390BCPZ can be used for bias control and gain adjustment in RF and baseband circuits. Its fast settling time of 10 µs supports dynamic adjustments. The low noise and high accuracy ensure minimal signal distortion. The serial interface allows easy configuration via a host processor, and the small package is ideal for dense circuit boards.
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Medical Devices
The AD7390BCPZ is used in medical devices such as patient monitors and diagnostic equipment for precise voltage generation. Its low power consumption is critical for battery-operated portable medical devices. The wide operating temperature range ensures reliability in clinical environments. The small package and serial interface facilitate compact, low-cost designs.
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Test and Measurement
The AD7390BCPZ is ideal for test equipment requiring programmable voltage references and calibration sources. Its 12-bit resolution and low drift provide accurate and stable outputs. The serial interface enables remote programming, and the low power consumption reduces thermal drift. The compact package allows high channel density in multi-channel instruments.
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おすすめ製品の概要
エンジニアリング参考データ: AD7390BCPZ — 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 | AD7391BCPZ | AD5300BRTZ | DAC121S101CIMK | MCP4921-E/SN |
|---|---|---|---|---|---|
| Package | 8-Lead LFCSP | 8-Lead LFCSP | SOT-23-6 | SOT-23-6 | SOIC-8 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Microchip Technology |
| Resolution | 12 bits | 10 bits | 8 bits | 12 bits | 12 bits |
| Supply Voltage Range | +2.7 V to +5.5 V | +2.7 V to +5.5 V | +2.7 V to +5.5 V | +2.7 V to +5.5 V | +2.7 V to +5.5 V |
| Supply Current | < 100 µA | < 100 µA | 140 µA | 170 µA | 350 µA |
| Settling Time | 10 µs | 10 µs | 8 µs | 10 µs | 4.5 µs |
| Interface | SPI, QSPI, MICROWIRE | SPI, QSPI, MICROWIRE | SPI | SPI | SPI |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | -40°C to +105°C | -40°C to +105°C | -40°C to +125°C |
主な差別化要因
- Ultra-low supply current of less than 100 µA （vs MCP4921-E/SN)
- Wide supply voltage range of +2.7 V to +5.5 V （vs DAC121S101CIMK)
- Compact 8-lead LFCSP package （vs AD5300BRTZ)
設計ノート
The AD7390BCPZ operates from a single supply of +2.7 V to +5.5 V. To achieve full 12-bit accuracy, ensure the supply is clean and well-decoupled. Place a 0.1 µF ceramic capacitor close to the VDD pin and a 1 µF tantalum capacitor nearby. The reference voltage (VREF) should also be decoupled with a 0.1 µF capacitor to minimize noise.
For optimal performance, keep the analog output trace short and away from digital signals. Use a ground plane to minimize noise coupling. The LFCSP package has an exposed pad that should be soldered to the PCB ground for thermal and electrical performance. Ensure proper solder mask openings for the pad.
One common mistake is driving the output with a load that exceeds the buffer's capability. The output can drive up to 100 pF capacitive load; for larger loads, use an external buffer. Also, ensure the serial clock is clean and free of glitches to avoid data corruption. The SYNC pin must be held low during data transfer and brought high after the last bit.
コンプライアンス情報
RoHS compliant and lead-free per Analog Devices product page. Other compliance data not specified in provided sources.
