STLC1511

28/31

4.4 Power Supply Noise

4.5 Absolute Maximum Ratings

The following table describes the maximum and minimum voltage ratings

Tx Powered Up

CO Oscillator mode

CO External Clock mode

CPE mode

Tx Powered Down

CO Oscillator mode

CO External Clock mode

CPE mode

65

60

65

41

36

41

71

66

71

45

39

45

mA

Includes 4mA for

digital supplies and

digital I/O

Tx Powered up

CO Oscillator mode

CO External Clock mode

CPE mode

Tx Powered Down

CO Oscillator mode

CO External Clock mode

CPE mode

325

300

325

200

175

200

373

347

373

237

205

237

mW

Includes 20mW for

digital supplies and

digital I/O

<1>Maximum current assumes a 7% increase due to process/temperature/Vcc plus the variation in the external 50k resistor (assumed

2%) connected to IREF50u. For this table the total variation is assumed at 9%.

Table 22. Power Supply Noise

Noise Band

Maximum 5V Supply Noise Spectral Density

Max 5V Supply Noise

(Over noise band)

30kHz < f <

112kHz

1.4

µVrms/rtHz @ 112kHz, rising 6dB per octave for decreasing

frequency

1.0mVrms

146kHz < f <

547kHz

1.0

µVrms/rtHz @ 146kHz, dropping 6dB per octave to

0.25

µVrms/rtHz @ 547kHz

0.30mVrms

Table 23. Maximum and minimum voltage ratings

pin

Maximum

Minimum

all VCC pins

6.5V

-0.5V

all other pins

VCC+0.4

-0.4

Table 21. Power Supply Limits

Parameter

Limits

Unit

Conditions

min

typ