SI4122-D-GTR Silicon Laboratories Inc, SI4122-D-GTR Datasheet - Page 20

• Manufacturer Part Number: SI4122-D-GTR
• Description: IC SYNTHESIZER RF2/IF 24TSSOP
• Manufacturer: Silicon Laboratories Inc
• Type: Frequency Synthesizerr

Specifications of SI4122-D-GTR

• Pll: Yes
• Input: Clock
• Output: Clock
• Number Of Circuits: 1
• Ratio - Input:output: 1:2
• Differential - Input:output: No/No
• Frequency - Max: 1.5GHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Frequency-max: 1.5GHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Si4133
3.10. Auxiliary Output (AUXOUT)
The signal appearing on AUXOUT is selected by setting the AUXSEL bits in the Main Configuration register
(Register 0).
The LDETB signal can be selected by setting the AUXSEL bits to 11. This signal can be used to indicate that the IF
or RF PLL is going to lose lock because of excessive ambient temperature drift and should be re-tuned. The
LDETB signal indicates a logical OR result if both IF and RF are simultaneously generating a signal.
20
450
400
350
300
250
200
150
100
50
0
Figure 18. Typical IF Output Voltage vs. Load Resistance at 550 MHz
0
PWDN Pin
PWDN = 0
PWDN = 1
LPWR=0
200
AUTOPDB
Table 11. Powerdown Configuration
X
0
0
0
0
1
400
PDIB
X
0
0
1
1
x
Rev. 1.61
Load Resistance ()
LPWR=1
600
PDRB
X
0
1
0
1
x
IF Circuitry RF Circuitry
800
OFF
OFF
OFF
ON
ON
ON
1000
OFF
OFF
OFF
ON
ON
ON
1200