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Replacement of LTC2245, based on a single-channel 14-bit GX2245 security infrared imaging system application program

Time:2024-10-09 Views:573
Today‘s security issues are of great concern, and an efficient and reliable security imaging system is essential for safeguarding public safety and personal property. The high performance analog-to-digital converter GX2245 can replace the LTC2245 to provide an excellent solution for security imaging systems. 
With 14-bit resolution and a maximum sampling rate of 80MSPS, the GX2245 is capable of high-precision analog-to-digital signal conversion. Its low-noise and low-power characteristics give it a significant advantage in the field of security imaging. In addition, the GX2245 has excellent linearity and dynamic range, which can capture subtle image changes and provide clear and accurate image information for security monitoring.

The GX2245 is an analog-to-digital converter with a multi-stage differential pipeline architecture, built-in high-performance sample-and-hold circuitry and an on-chip reference voltage source, powered by a 3V analog power supply, with a single output power supply capable of driving 2.1V to 3.6V logic circuits.
Designed to digitize high-frequency, wide dynamic range signals, the analog-to-digital converter is ideally suited for demanding imaging and communications applications. With a 72.8dB signal-to-noise ratio and 85dB spurious-free dynamic range at 80MHz sampling, it can be used for input signals well above Nyquist frequencies. DC specifications include ±1LSB INL (typical), ±0.25LSB DNL (typical) and no leakage codes. Reference noise at the input is very low at 0.96 LSBRMS.
GX2245 main performance description:
- 3V power supply.
- Flexible input range: 1VP-P to 2VP-P
- 2.1V to 3.3V output supply
- Low power consumption: 60mW(10MSPS)
             218mW(80MSPS)
- 80MHz sampling, 30.5MHz input:
   Signal-to-Noise Ratio (SNR): 72.83dBFS
   Spurious Free Dynamic Range (SFDR): 85.62dBFS
- Differential Nonlinearity (DNL): ±0.25LSB (typical)
- Reference noise at input: 0.96LSBRMS
- On-chip reference voltage source and sample-and-hold circuitry
- Available in a 32-pin QFN package.