AD7391BCPZ - 10-Bit Serial DAC | Analog Devices | 32-LFCSP
MPN: AD7391BCPZ ✓ Hoạt độngAD7391BCPZ Tóm tắt
A digital-to-analog converter (DAC) is an electronic component that converts digital binary data into an analog voltage or current. The AD7391 is a voltage-output DAC, meaning it directly outputs a voltage proportional to the digital input. It is a key building block in many systems, bridging the digital domain of microcontrollers and DSPs with the analog world of sensors, actuators, and audio amplifiers. In the hierarchy of signal chain components, a DAC is part of the data converter family, which also includes ADCs (analog-to-digital converters).
Key features of the AD7391BCPZ include its 10-bit resolution, serial interface (SPI-compatible), and low power consumption. The device operates from a single +2.7 V to +5.5 V supply, making it ideal for battery-powered and portable applications. It also features a power-down mode that reduces current consumption to a few microamperes, further extending battery life. The output is buffered, providing a low-impedance drive capability.
Technically, the AD7391 uses a resistor-string architecture with a rail-to-rail output buffer. This architecture ensures monotonicity and low differential nonlinearity (DNL). The serial interface allows easy connection to microcontrollers and DSPs with minimal pin count. The device is specified over the industrial temperature range of -40°C to +85°C, making it suitable for a wide range of environments.
Typical applications include portable instrumentation, battery-powered data acquisition systems, digital gain and offset adjustment, and programmable voltage references. Its low power and small package make it ideal for space-constrained designs.
When designing with the AD7391, ensure that the reference voltage is stable and well-decoupled. The output buffer can drive capacitive loads, but for best settling time, keep the load capacitance below 100 pF. Also, use a clean digital supply to avoid noise coupling into the analog output.
Bộ thay thế dễ dàng lắp đặt cho AD7391BCPZ — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với AD7391BCPZ (cùng hình factor và footprint) — khác nhau ở Package, Resolution, Settling Time, Interface Type, Power-Down Current.
AD7391BCPZ-RL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7391BCPZ-RL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7391BCPZ-REEL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7391BCPZ-REEL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7391BCPZ-ND
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
AD7391BCPZ Tỷ lệ tối đa & tính chất điện
| Độ phân giải | 10 bits |
| Number of Channels | 1 |
| Kiểu đầu ra | Voltage - Buffered |
| Settling Time | 70 µs (typical) |
| Differential Nonlinearity (DNL) | ±1 LSB (max) |
| Integral Nonlinearity (INL) | ±1 LSB (max) |
| Supply Voltage Range | +2.7 V to +5.5 V |
| Điện áp cung cấp | 100 µA (max) |
| Power-Down Current | 1 µA (max) |
| Loại giao diện | Serial (SPI-compatible) |
| Điện áp tham chiếu | VREF (external) |
| Khoảng nhiệt độ hoạt động | -40°C to +85°C |
| Hộp | 32-LFCSP-VQ (5x5 mm) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân AD7391BCPZ
| Chân 1 | VOUT — Analog output voltage |
| Chân 2 | GND — Ground |
| Chân 3 | VREF — Reference voltage input |
| Chân 4 | VDD — Positive supply |
| Chân 5 | SCLK — Serial clock input |
| Chân 6 | SDIN — Serial data input |
| Chân 7 | SYNC — Active low frame sync |
| Chân 8 | NC — No connect |
Ứng dụng tiêu biểu
AD7391BCPZ phù hợp cho 6 Áp dụngs: Portable Instrumentation, Battery-Powered Data Acquisition, Digital Gain and Offset Adjustment, Programmable Voltage Reference, Audio Volume Control, Industrial Process Control.
Portable Instrumentation
The AD7391BCPZ's low power consumption (100 µA) and small 5x5 mm LFCSP package make it ideal for battery-powered handheld instruments. It provides precise analog output for calibration, offset adjustment, and sensor excitation. The serial interface minimizes pin count, saving board space. With a settling time of 70 µs, it supports fast updates for real-time adjustments. The wide supply range (2.7V-5.5V) allows direct operation from a single lithium-ion cell or two alkaline batteries, simplifying power design.
Được đề xuất
Battery-Powered Data Acquisition
In battery-powered data acquisition systems, the AD7391BCPZ provides a programmable reference or analog output for sensor excitation and offset trimming. Its micropower operation extends battery life, and the power-down mode reduces current to 1 µA when idle. The serial interface allows easy connection to low-power microcontrollers. The 10-bit resolution is sufficient for many industrial and medical sensors. The device's rail-to-rail output buffer can drive capacitive loads, simplifying interface to ADC inputs.
Được đề xuất
Digital Gain and Offset Adjustment
The AD7391BCPZ is commonly used for digital gain and offset adjustment in signal conditioning circuits. By placing the DAC in the feedback path of an op-amp, engineers can digitally trim gain and offset with 10-bit resolution. The low DNL (±1 LSB) ensures monotonic adjustment, critical for closed-loop calibration. The serial interface allows remote adjustment via a microcontroller. The device's low power and small package make it suitable for multi-channel systems where multiple DACs are needed.
Được đề xuất
Programmable Voltage Reference
The AD7391BCPZ can be used as a programmable voltage reference in test equipment and calibration systems. By setting the digital code, the output voltage can be precisely adjusted from 0V to VREF. The buffered output provides low impedance, allowing it to drive loads directly. The 10-bit resolution provides 1024 steps, sufficient for many calibration applications. The device's low temperature drift and monotonicity ensure stable and predictable output over temperature.
Được đề xuất
Audio Volume Control
The AD7391BCPZ can be used as a digital volume control in audio systems. By adjusting the DAC output voltage, the gain of an audio amplifier can be controlled. The low noise and low distortion of the DAC ensure high audio quality. The serial interface allows easy integration with digital audio processors. The 10-bit resolution provides 1024 volume steps, offering fine control. The device's small package is suitable for compact audio devices like headphones and portable speakers.
Được đề xuất
Industrial Process Control
In industrial process control, the AD7391BCPZ provides analog output for valve positioning, motor speed control, and setpoint adjustment. Its wide supply range and industrial temperature range (-40°C to +85°C) make it suitable for harsh environments. The serial interface allows easy connection to PLCs and industrial microcontrollers. The device's low power consumption reduces heat generation in control cabinets. The 10-bit resolution is adequate for many process control loops.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho AD7391BCPZ — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | AD7391BRZ | AD7390BRZ | AD7391BCPZ-RL7 |
|---|---|---|---|---|
| Package | 32-LFCSP-VQ (5x5 mm) | SOIC-8 | SOIC-8 | 32-LFCSP-VQ (5x5 mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 10 bits | 10 bits | 12 bits | 10 bits |
| Supply Voltage Range | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V | 2.7V to 5.5V |
| Supply Current | 100 µA max | 100 µA max | 100 µA max | 100 µA max |
| Settling Time | 70 µs typ | 70 µs typ | 70 µs typ | 70 µs typ |
| Interface | Serial (SPI) | Serial (SPI) | Serial (SPI) | Serial (SPI) |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
Bảo phân biệt quan trọng
- Ultra-low power consumption (vsAD7390BRZ)
- Small package size (vsAD7391BRZ)
- Wide supply voltage range (vsAD7390BRZ)
Ghi chú thiết kế
The AD7391BCPZ operates from a single supply of 2.7V to 5.5V. Use a low-impedance supply and place a 0.1µF ceramic capacitor close to the VDD pin to decouple high-frequency noise. For best performance, a 10µF tantalum capacitor in parallel is recommended if the supply is noisy.
For the 32-LFCSP package, ensure proper thermal and electrical connection to the exposed pad. Solder the exposed pad to a ground plane to improve thermal dissipation and reduce ground inductance. Follow the land pattern recommended in the datasheet for reliable soldering.
The reference voltage (VREF) must be stable and noise-free. Use a precision reference and bypass it with a 0.1µF capacitor. Avoid routing digital signals near the VREF trace to prevent coupling. Also, ensure the serial interface signals (SCLK, SDIN, SYNC) are clean and meet setup/hold times.
Thông tin tuân thủ
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
