Thông số kỹ thuật
| thuộc tính | Giá trị |
| Package | Tube |
| ProductStatus | Active |
| NumberofBits | 16 |
| SamplingRate(PerSecond) | 500 |
| NumberofInputs | 2 |
| InputType | Differential |
| DataInterface | SPI, DSP |
| Configuration | MUX-PGA-ADC |
| NumberofA/DConverters | 1 |
| Architecture | Sigma-Delta |
| ReferenceType | External |
| Voltage-SupplyAnalog | 2.7V ~ 3.3V, 5V |
| Voltage-SupplyDigital | 2.7V ~ 3.3V, 5V |
| Features | PGA |
| OperatingTemperature | -40°C ~ 85°C |
| Package/Case | 16-DIP (0.300, 7.62mm) |
| SupplierDevicePackage | 16-PDIP |
Tổng quan
Description
The AD7705BNZ is a 16-bit, sigma-delta (Σ-Δ) ADC from Analog Devices, designed for low-frequency, high-precision measurements. It features two differential input channels, an on-chip PGA (Programmable Gain Amplifier) with gains from 1 to 128, and SPI-compatible serial interface for communication.
Key features:
- Resolution: 16 bits (no missing codes).
- Input Range: Bipolar (±VREF) or unipolar (0 to +VREF).
- Low Noise: Optimized for slow, accurate signals (e.g., sensors like thermocouples, strain gauges).
- Internal Clock: Eliminates external oscillator needs.
- Low Power: Suitable for battery-powered applications.
Applications include industrial process control, weigh scales, and portable instrumentation. The AD7705BNZ operates on 2.7V–5.25V, making it versatile for various systems.
For setup, configure register settings (gain, filter, mode) via SPI, then read conversion results. Its self-calibration ensures accuracy over temperature and voltage changes.
A compact, reliable choice for low-speed, high-resolution signal acquisition.
Key features:
- Resolution: 16 bits (no missing codes).
- Input Range: Bipolar (±VREF) or unipolar (0 to +VREF).
- Low Noise: Optimized for slow, accurate signals (e.g., sensors like thermocouples, strain gauges).
- Internal Clock: Eliminates external oscillator needs.
- Low Power: Suitable for battery-powered applications.
Applications include industrial process control, weigh scales, and portable instrumentation. The AD7705BNZ operates on 2.7V–5.25V, making it versatile for various systems.
For setup, configure register settings (gain, filter, mode) via SPI, then read conversion results. Its self-calibration ensures accuracy over temperature and voltage changes.
A compact, reliable choice for low-speed, high-resolution signal acquisition.
Equivalent
Equivalent products to the AD7705BNZ (16-bit sigma-delta ADC) include:
- AD7706BNZ: Similar but with differential inputs.
- AD7791: Lower power, 24-bit resolution.
- ADS1248: 24-bit, higher precision.
- LTC2440: 24-bit, faster sampling.
- MCP3421: 18-bit, I2C interface.
These alternatives offer comparable features like low noise, high resolution, and serial interfaces. Choose based on specific needs (resolution, power, or interface).
- AD7706BNZ: Similar but with differential inputs.
- AD7791: Lower power, 24-bit resolution.
- ADS1248: 24-bit, higher precision.
- LTC2440: 24-bit, faster sampling.
- MCP3421: 18-bit, I2C interface.
These alternatives offer comparable features like low noise, high resolution, and serial interfaces. Choose based on specific needs (resolution, power, or interface).
Features
The AD7705BNZ is a 16-bit, sigma-delta ADC with key features:
- Resolution: 16 bits (no missing codes).
- Channels: 2 fully differential or 4 pseudo-differential analog inputs.
- Output Data Rate: Programmable from 0 to 500 Hz.
- On-Chip Features: PGA (gain: 1–128), digital filter, and calibration.
- Interface: SPI-compatible serial interface.
- Power Supply: Single 2.7V–5.25V operation.
- Low Power: 1 mW (3V supply).
- Applications: Weigh scales, industrial control, and portable instrumentation.
Compact, precise, and low-power, ideal for sensor signal conditioning.
- Resolution: 16 bits (no missing codes).
- Channels: 2 fully differential or 4 pseudo-differential analog inputs.
- Output Data Rate: Programmable from 0 to 500 Hz.
- On-Chip Features: PGA (gain: 1–128), digital filter, and calibration.
- Interface: SPI-compatible serial interface.
- Power Supply: Single 2.7V–5.25V operation.
- Low Power: 1 mW (3V supply).
- Applications: Weigh scales, industrial control, and portable instrumentation.
Compact, precise, and low-power, ideal for sensor signal conditioning.
Pinout
The AD7705BNZ is a 16-bit sigma-delta ADC with 16 pins in a PDIP package. Key functions include:
- Analog Inputs: Differential channels (AIN1+, AIN1-, AIN2+, AIN2-) for dual-channel conversion.
- Reference Input (REF IN+, REF IN-): External voltage reference (typically 1V–5V).
- Serial Interface (SCLK, DIN, DOUT, CS): SPI-compatible for communication.
- Clock (CLK IN, CLK OUT): Supports external/internal clocking.
- Power (AVDD, DVDD, AGND, DGND): Dual supply (2.7V–5.25V) with separate analog/digital grounds.
- Reset (RESET): Active-low reset.
- DRDY (Data Ready): Output flag indicating conversion completion.
It’s ideal for low-frequency, high-precision measurements (e.g., sensors).
- Analog Inputs: Differential channels (AIN1+, AIN1-, AIN2+, AIN2-) for dual-channel conversion.
- Reference Input (REF IN+, REF IN-): External voltage reference (typically 1V–5V).
- Serial Interface (SCLK, DIN, DOUT, CS): SPI-compatible for communication.
- Clock (CLK IN, CLK OUT): Supports external/internal clocking.
- Power (AVDD, DVDD, AGND, DGND): Dual supply (2.7V–5.25V) with separate analog/digital grounds.
- Reset (RESET): Active-low reset.
- DRDY (Data Ready): Output flag indicating conversion completion.
It’s ideal for low-frequency, high-precision measurements (e.g., sensors).
Manufacturer
The AD7705BNZ is manufactured by Analog Devices, Inc. (ADI), a leading global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing (DSP) integrated circuits. Founded in 1965 and headquartered in Wilmington, Massachusetts, ADI is renowned for its precision data converters, amplifiers, and sensor interface solutions. The AD7705BNZ is a 16-bit sigma-delta ADC designed for low-frequency, high-accuracy measurement applications, reflecting ADI's expertise in precision analog technology. The company serves industries like industrial, automotive, healthcare, and communications.
Application
The AD7705BNZ is a 16-bit sigma-delta ADC with low power consumption, ideal for precision measurement applications. Key areas include:
- Industrial Sensors (pressure, temperature, strain gauges)
- Medical Devices (patient monitoring, portable instruments)
- Process Control (PLC systems, automation)
- Weigh Scales & Load Cells
- Battery-Powered Systems (due to low power)
- Data Acquisition Systems
Its built-in PGA and on-chip calibration make it suitable for low-frequency, high-accuracy signal conditioning.
- Industrial Sensors (pressure, temperature, strain gauges)
- Medical Devices (patient monitoring, portable instruments)
- Process Control (PLC systems, automation)
- Weigh Scales & Load Cells
- Battery-Powered Systems (due to low power)
- Data Acquisition Systems
Its built-in PGA and on-chip calibration make it suitable for low-frequency, high-accuracy signal conditioning.
Package
The AD7705BNZ comes in a 24-lead PDIP (Plastic Dual In-Line Package). This through-hole package is suitable for prototyping and applications requiring easy manual assembly. It has a standard 0.3-inch row spacing and is robust for industrial environments.
