ADS7844N

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ADS7844N

IC ADC 12BIT SAR 20SSOP

  • Fabricant
  • Mfr. Partie #ADS7844N
  • Paquet SSOP (DB)-20
  • Fiche de données
  • En stock3518

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Spécifications

Package Bulk,Tube
ProductStatus Active
NumberofBits 12
SamplingRate(PerSecond) 200k
NumberofInputs 4, 8
InputType Differential, Single Ended
DataInterface SPI
Configuration MUX-S/H-ADC
Ratio-S/H:ADC 1:1
NumberofA/DConverters 1
Architecture SAR
ReferenceType External
Voltage-SupplyAnalog 2.7V ~ 3.6V, 5V
Voltage-SupplyDigital 2.7V ~ 3.6V, 5V
OperatingTemperature -40°C ~ 85°C
Package/Case 20-SSOP (0.209, 5.30mm Width)
SupplierDevicePackage 20-SSOP

Vue d'ensemble

Description

The ADS7844N is a high-resolution, low-power, capacitive touchscreen controller designed for use in various applications such as smartphones, tablets, and industrial devices. It features a 4-wire resistive touch interface that enables accurate touch detection and multi-touch capabilities. The device supports a maximum resolution of 12 bits, providing fine detail in touch input.
Key features include:
1. Low Power Consumption: Designed for battery-operated devices, it minimizes energy usage during operation.
2. Multi-Touch Support: Allows for simultaneous detection of multiple touch points, enhancing user interaction.
3. SPI Interface: Provides a simple and reliable communication protocol for integration with microcontrollers and processors.
4. Configurable Settings: Users can adjust sampling rates and other parameters for optimized performance based on application needs.
Overall, the ADS7844N facilitates responsive touch experiences in a compact, efficient package, making it suitable for modern electronic devices.

Features

The ADS7844N is a 4-channel, 12-bit analog-to-digital converter (ADC) from Texas Instruments designed for touch screen applications. Key features include:
1. Resolution: 12-bit resolution provides high accuracy in signal conversion.
2. Sampling Rate: Capable of sampling up to 125 kSPS, allowing for rapid data acquisition.
3. Multi-channel Input: Supports up to four simultaneous inputs, facilitating multi-touch capabilities.
4. Interface: SPI-compatible interface for easy communication with microcontrollers.
5. Low Power Consumption: Operates with low power, making it suitable for battery-powered devices.
6. Built-in Reference: Integrated voltage reference simplifies design and improves performance.
7. Operating Voltage: Supports a range of supply voltages (2.7V to 5.5V), enhancing design flexibility.
8. Temperature Range: Operates within a wide temperature range, ensuring reliability in diverse environments.
These features make the ADS7844N ideal for applications such as touch screens, industrial controls, and portable devices.

Package

The ADS7844N is typically available in a TQFP (Thin Quad Flat Package) format, specifically a 32-pin TQFP. This package type offers a compact footprint suitable for various applications in embedded systems.

Pinout

The ADS7844N is a 4-channel, 12-bit Analog-to-Digital Converter (ADC) designed for touch screen applications. It features a total of 16 pins, which include:
1. VDD - Power supply
2. GND - Ground
3. AVDD - Analog power supply
4. REF - Reference voltage
5. SCLK - Serial clock input
6. DIN - Serial data input
7. DOUT - Serial data output
8. CS - Chip select
9. IRQ - Interrupt request output
10. BUSY - Busy status indicator
11. COM - Communication pin for external connections
12. CH0_CH3 - Channel selection pins
13. TST - Test pin
14. GPIO - General-purpose input/output pins (if applicable)
15. NC - No connection (not used)
Each pin serves specific functions for power supply, data communication, and control, facilitating the ADC's operation in processing analog signals from multiple channels.

Manufacturer

The ADS7844N is manufactured by Texas Instruments (TI), a leading global semiconductor company. Texas Instruments specializes in the design and production of analog, digital signal processing (DSP), and embedded processing chips. Established in 1930, TI is recognized for its innovations in electronics and is a major player in various markets, including automotive, industrial, communications, and consumer electronics. The company focuses on providing integrated circuits and solutions that enable a wide range of applications, from simple to complex electronic systems. TI is also known for its commitment to research and development, ensuring it remains at the forefront of technology advancements in the semiconductor industry.

Application

The ADS7844N is primarily used in capacitive touch applications, such as touchscreen interfaces for smartphones, tablets, and industrial control panels. It can also be applied in medical devices, automotive displays, and consumer electronics to enable user interaction. Additionally, it serves in data acquisition systems for measuring voltage and current in various sensors.

Equivalent

Equivalent products to the ADS7844N chip include the following:
1. ADS7843 - Similar 4-channel, 12-bit ADC with lower resolution.
2. ADS7845 - 5-channel variant with similar specifications.
3. MCP3204 - 4-channel, 12-bit ADC from Microchip.
4. LTC1864 - 16-bit, 4-channel ADC from Analog Devices.
Always verify compatibility with your specific application.

Expédition

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Référence des frais d'expédition (DHL/FedEx):

DHL: Les frais d'expédition vont de 25 à 45 $ (0,5 kg), avec un délai de livraison estimé de 2 à 5 jours ouvrables.

FedEx: Les frais d'expédition varient de 25 à 40 $ (0,5 kg), avec un délai de livraison estimé de 3 à 7 jours ouvrables.

UPS: Les frais d'expédition vont de 25 à 45 $ (0,5 kg), avec un délai de livraison estimé de 3 à 7 jours ouvrables.

TNT: Les frais d'expédition varient de 25 à 65 $ (0,5 kg), avec un délai de livraison estimé de 3 à 7 jours ouvrables.

EMS: Les frais d'expédition varient de 30 à 50 $ (0,5 kg), avec un délai de livraison estimé de 7 à 15 jours ouvrables.

Courrier aérien enregistré: Le coût d'expédition est de 2 à 4 $ (0,1 kg), avec un délai de livraison estimé de 5 à 20 jours ouvrables.

Paiements

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