PSB21473FV13XT Infineon Technologies, PSB21473FV13XT Datasheet - Page 369

• Manufacturer Part Number: PSB21473FV13XT
• Manufacturer: Infineon Technologies

Specifications of PSB21473FV13XT

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Lead Free Status / RoHS Status: Compliant

Figure 19-2 Capacity at BGREF
If the used microphones should be used in a ’single ended application’, ie. one of the
microphone pins is connected to GND, the following external circuitry is recommended,
where one of INCA-D’s differential microphone input pins is set to the VREF DC potential
according to Figure 19-3.
Figure 19-3 Single ended microphone connection
The dotted lines in Figure 19-3 correspond to the remaining differential input lines.
If the noise level of the VREF ouput signal should be further improved, an RC lowpass
filter can optionally be added as described in Figure 19-4.
Data Sheet
Micro
100 nF
VREF
390
10k
10k
INCA-D
BGREF
VREF
2,2nF
2,2nF
extern
33nF
PAD resistor
PAD resistor
369
intern
~500
~500
14,5k
14,5k
VREF
Analog Front End
PSB 21473
2003-03-31
INCA-D