ADS7844E/2K5G4

Product Overview

Category

The ADS7844E/2K5G4 belongs to the category of analog-to-digital converters (ADCs).

Use

This product is used to convert analog signals into digital data for processing and analysis in various electronic systems.

Characteristics

• High-resolution: The ADS7844E/2K5G4 offers a resolution of 12 bits, ensuring accurate conversion of analog signals.
• Low power consumption: It operates at low power levels, making it suitable for battery-powered devices.
• Fast conversion rate: With a maximum sampling rate of 200 kilosamples per second (ksps), it can quickly convert analog signals into digital form.
• Wide input voltage range: The ADC can handle input voltages ranging from 0 to Vref, providing flexibility in signal acquisition.
• Small package size: The ADS7844E/2K5G4 comes in a compact package, allowing for space-efficient integration into electronic systems.

Packaging/Quantity

The ADS7844E/2K5G4 is typically available in surface-mount packages. It is commonly supplied in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Resolution: 12 bits
• Sampling Rate: Up to 200 ksps
• Input Voltage Range: 0 to Vref
• Power Supply: 2.7V to 5.25V
• Operating Temperature Range: -40°C to +85°C
• Package Type: Surface Mount

Pin Configuration

The ADS7844E/2K5G4 has a total of 16 pins, which are assigned specific functions as follows:

1. VDD: Power supply voltage
2. REF: Reference voltage input
3. AGND: Analog ground
4. VIN1: Analog input channel 1
5. VIN2: Analog input channel 2
6. VIN3: Analog input channel 3
7. VIN4: Analog input channel 4
8. CS: Chip select input
9. DOUT: Serial data output
10. DIN: Serial data input
11. SCLK: Serial clock input
12. PD0: Power-down mode control bit 0
13. PD1: Power-down mode control bit 1
14. PD2: Power-down mode control bit 2
15. PD3: Power-down mode control bit 3
16. DGND: Digital ground

Functional Features

• Simultaneous Sampling: The ADS7844E/2K5G4 can simultaneously sample multiple analog input channels, enabling efficient data acquisition.
• Serial Interface: It utilizes a serial interface for communication with microcontrollers or other digital devices, simplifying integration into larger systems.
• Low Noise: The ADC incorporates noise reduction techniques to ensure accurate conversion of analog signals even in noisy environments.
• Programmable Gain Amplifier (PGA): The device includes a PGA that allows users to adjust the gain of the input signal, enhancing flexibility in signal conditioning.

Advantages and Disadvantages

Advantages

• High resolution ensures precise conversion of analog signals.
• Low power consumption makes it suitable for battery-powered applications.
• Fast conversion rate enables real-time data processing.
• Wide input voltage range provides flexibility in signal acquisition.
• Small package size allows for space-efficient integration.

Disadvantages

• Limited number of analog input channels compared to some other ADCs.
• Requires an external reference voltage source for accurate conversion.

Working Principles

The ADS7844E/2K5G4 operates based on the successive approximation method. It samples the analog input voltage, converts it into a digital value using an internal ADC, and then outputs the result through the serial interface. The device utilizes an internal clock to control the sampling and conversion process, ensuring accurate and efficient operation.

Detailed Application Field Plans

The ADS7844E/2K5G4 finds applications in various fields, including:

1. Industrial Automation: It can be used for data acquisition in industrial control systems, enabling precise monitoring and control of analog signals.
2. Medical Devices: The ADC is suitable for medical equipment that requires accurate conversion of physiological signals for diagnosis and treatment purposes.
3. Test and Measurement Instruments: It can be integrated into test and measurement devices to capture and analyze analog signals with high resolution.
4. Automotive Electronics: The ADS7844E/2K5G4 is utilized in automotive systems for tasks such as sensor data acquisition and control.

Detailed and Complete Alternative Models

• ADS7846: Similar to the ADS7844E/2K5G4, but offers touch screen controller functionality in addition to ADC capabilities.
• ADS7864: A higher-resolution ADC with 14 bits of resolution, providing enhanced accuracy for demanding applications.
• ADS7884: This ADC offers a faster sampling rate of