XL548

XL548 and XD548 are 8-bit serial A/D converter chip, which adopts CMOS technology and realizes A/D conversion by 8-bit switching capacitor successive approximation method. It can be serial interface with general microprocessor and controller through CLK, CS and DATAOUT, and constitute a variety of cheap measurement and control application systems. With a 4MHz on-chip system clock and hardware and software control circuit, the conversion time is up to 17μs and the XL548 sampling is 45,500 times /s. The maximum total out-of-balance error of other functions is ±0.5LSB and the typical power consumption is 6mW. Differential reference voltage high resistance input, anti-interference, can be calibrated according to the proportional scale conversion range, VREF+ - VREF- ≥ 1V can be used for small signal sampling.

Applications

• Handheld device
• Portable monitors and power management
• Industrial signal monitoring
• Measurement and control instrument

Key features

• Adopts three-wire serial mode and microprocessor interface
• 8-bit resolution AD converter
• A typical internal system clock of 4MHz
• On-chip sampling and holding circuit, conversion time 17us
• Differential voltage input
• Wide operating voltage 3V - 6.5V
• Low power consumption 15mW
• Total offset error 0.5LSB
• Sampling speed 45,500 times /S
• An internal 4MHz system clock is provided on chip and is independent of the external I/OCLOCK for operation control
• Package option: XL548 (SOP8), XD548 (DIP8)