Спецификации
| Атрибут | Ценность |
| Package / Case | Bulk,Tube |
| Part Status | Active |
| Number of Bits | 12 |
| Sampling Rate(Per Second) | 200k |
| Number of Inputs | 4, 8 |
| Input Type | Differential, Single Ended |
| Data Interface | SPI |
| Configuration | MUX-S/H-ADC |
| Ratio - S / H: ADC | 1:1 |
| Number of A/D Converters | 1 |
| Architecture | SAR |
| Reference Type | External |
| Voltage - Supply, Analog | 2.7V ~ 3.6V, 5V |
| Voltage - Supply, Digital | 2.7V ~ 3.6V, 5V |
| Operating Temperature | -40°C ~ 85°C |
| Supplier Device Package | 20-SSOP |
Обзор
Description
The ADS7844E is a 12-bit, 8-channel analog-to-digital converter (ADC) designed by Texas Instruments. It is part of the ADS7844 family and is used for precise data acquisition applications. This device operates with a low power consumption, making it suitable for battery-powered and portable devices.
The ADS7844E supports a serial interface, which allows for seamless integration with microcontrollers and digital signal processors. It features a high-speed sampling rate, up to 200 kSPS (kilo samples per second), and a flexible input range, supporting both single-ended and differential input configurations.
The device operates over a wide power supply range from 2.7V to 5.25V, offering versatility in various applications. Its onboard sample-and-hold function ensures accurate conversion by maintaining the input signal during the conversion process.
With its compact size and robust performance, the ADS7844E is widely used in applications such as industrial automation, medical devices, and portable instrumentation, where reliable and efficient analog-to-digital conversion is critical.
The ADS7844E supports a serial interface, which allows for seamless integration with microcontrollers and digital signal processors. It features a high-speed sampling rate, up to 200 kSPS (kilo samples per second), and a flexible input range, supporting both single-ended and differential input configurations.
The device operates over a wide power supply range from 2.7V to 5.25V, offering versatility in various applications. Its onboard sample-and-hold function ensures accurate conversion by maintaining the input signal during the conversion process.
With its compact size and robust performance, the ADS7844E is widely used in applications such as industrial automation, medical devices, and portable instrumentation, where reliable and efficient analog-to-digital conversion is critical.
Equivalent
The ADS7844E is a 12-bit analog-to-digital converter (ADC) from Texas Instruments. Equivalent products include:
1. AD7908 from Analog Devices
2. MCP3208 from Microchip Technology
3. MAX1270 from Maxim Integrated
These alternatives offer similar functionality in terms of resolution and input channels, but specifics like power consumption, speed, and package may vary, so it's important to compare their datasheets closely to ensure compatibility with your application.
1. AD7908 from Analog Devices
2. MCP3208 from Microchip Technology
3. MAX1270 from Maxim Integrated
These alternatives offer similar functionality in terms of resolution and input channels, but specifics like power consumption, speed, and package may vary, so it's important to compare their datasheets closely to ensure compatibility with your application.
Features
The ADS7844E is a 12-bit, 4-channel analog-to-digital converter (ADC) with key features that make it suitable for various applications. It operates on a single 2.7V to 5.25V power supply, making it versatile for different system requirements. The device offers a low power consumption, which is crucial for battery-powered applications. It has a serial interface compatible with SPI™, QSPI™, and Microwire™, providing easy integration with microcontrollers.
The ADS7844E supports a sampling rate up to 200 kSPS, ensuring fast data conversion for time-sensitive applications. It includes a four-channel input multiplexer, allowing it to handle multiple input signals. With a differential input capability, the ADC can measure both positive and negative voltages relative to a reference point.
The device features a programmable data acquisition time, enabling customization for specific application needs. It also has an internal reference voltage, improving accuracy and stability. The compact 16-lead SSOP package aids in minimizing board space, making it suitable for space-constrained designs. Overall, the ADS7844E is a robust and efficient solution for precision data acquisition tasks.
The ADS7844E supports a sampling rate up to 200 kSPS, ensuring fast data conversion for time-sensitive applications. It includes a four-channel input multiplexer, allowing it to handle multiple input signals. With a differential input capability, the ADC can measure both positive and negative voltages relative to a reference point.
The device features a programmable data acquisition time, enabling customization for specific application needs. It also has an internal reference voltage, improving accuracy and stability. The compact 16-lead SSOP package aids in minimizing board space, making it suitable for space-constrained designs. Overall, the ADS7844E is a robust and efficient solution for precision data acquisition tasks.
Pinout
The ADS7844E is a 12-bit, 8-channel analog-to-digital converter (ADC) with a serial interface. It comes in a 16-pin package. The pin functions are as follows:
1. VDD (Pin 16): Power supply.
2. GND (Pin 9): Ground.
3. CS (Pin 1): Chip select input, active low.
4. DCLK (Pin 2): Serial data clock input.
5. DIN (Pin 3): Serial data input.
6. DOUT (Pin 4): Serial data output.
7-14. CH0-CH7 (Pins 5-12): Analog input channels 0 to 7.
15. REFIN/REFOUT (Pin 13): Reference voltage input/output.
16. VREF (Pin 14): Reference voltage.
The ADS7844E is used for digitizing analog signals with applications in data acquisition systems, industrial controls, and instrumentation. It operates with a reference voltage that determines the analog input range and uses a four-wire serial interface for communication with microcontrollers or digital signal processors.
1. VDD (Pin 16): Power supply.
2. GND (Pin 9): Ground.
3. CS (Pin 1): Chip select input, active low.
4. DCLK (Pin 2): Serial data clock input.
5. DIN (Pin 3): Serial data input.
6. DOUT (Pin 4): Serial data output.
7-14. CH0-CH7 (Pins 5-12): Analog input channels 0 to 7.
15. REFIN/REFOUT (Pin 13): Reference voltage input/output.
16. VREF (Pin 14): Reference voltage.
The ADS7844E is used for digitizing analog signals with applications in data acquisition systems, industrial controls, and instrumentation. It operates with a reference voltage that determines the analog input range and uses a four-wire serial interface for communication with microcontrollers or digital signal processors.
Manufacturer
The ADS7844E is manufactured by Texas Instruments. Texas Instruments, often abbreviated as TI, is an American technology company headquartered in Dallas, Texas. It is known for designing and manufacturing semiconductors and various integrated circuits, which are used in a wide range of electronic devices. The company's products include analog chips and embedded processors, which play a crucial role in the electronics industry. TI serves diverse markets, including industrial, automotive, personal electronics, communications equipment, and enterprise systems. The company is recognized for its innovation in the semiconductor industry and has a strong emphasis on research and development.
Application
The ADS7844E is a 4-channel, 12-bit analog-to-digital converter (ADC) commonly used in applications requiring precise data acquisition and conversion. Key application areas include:
1. Industrial Automation: For monitoring sensors and control signals.
2. Medical Devices: In portable diagnostic equipment for capturing analog signals.
3. Consumer Electronics: Used in touch screen interfaces to convert touch input into digital data.
4. Data Acquisition Systems: Provides accurate conversion in systems collecting and analyzing multiple analog inputs.
5. Automotive Systems: Employed in various control modules for signal processing.
6. Communication Equipment: Used in signal processing applications requiring multiple channels.
Its versatility and precision make it suitable for these diverse applications.
1. Industrial Automation: For monitoring sensors and control signals.
2. Medical Devices: In portable diagnostic equipment for capturing analog signals.
3. Consumer Electronics: Used in touch screen interfaces to convert touch input into digital data.
4. Data Acquisition Systems: Provides accurate conversion in systems collecting and analyzing multiple analog inputs.
5. Automotive Systems: Employed in various control modules for signal processing.
6. Communication Equipment: Used in signal processing applications requiring multiple channels.
Its versatility and precision make it suitable for these diverse applications.
Package
The ADS7844E is typically available in a 16-pin SSOP (Shrink Small Outline Package). This package type is compact, suitable for surface-mount technology, and is often used in applications requiring precision analog-to-digital conversion.
