MICRF405 datasheet(40/46 Pages) MICREL

40 / 46 page

Micrel

MICRF405

April 2006

M9999-041906

(408) 955-1690

OutS2

OutS1

OutS0

The signals are available on the LD output

Gnd

N-div

M-div

ModOut

Bandgap

DVDD

TXSYMBOL – output of packet handling engine

Table 50. Test Signals. Only Available When LD_en=0.

PA_IB3

PA_IB2

State

PA uses bias current from PTAT bias source, external resistor (Pin 6)

PA uses bias current from CI bias source, external resistor (Pin 24)

PA uses bias current from internal bias source, PTAT

PA uses bias current from internal bias source, PTAT + CI

PA_IB1

PA_IB0

State

PA bias current setting, lowest bias current

PA bias current setting

PA bias current setting, highest bias current

PAB_IB3 PAB_IB2

State

PAbuffer uses bias current from PTAT bias source, external resistor (Pin 6)

PAbuffer uses bias current from CI bias source, external resistor (Pin 24)

PAbuffer uses bias current from internal bias source, PTAT

PAbuffer uses bias current from internal bias source, PTAT + CI

PAB_IB1 PAB_IB0

State

PAbuffer bias current setting, lowest bias current

PAbuffer bias current setting

PAbuffer bias current setting, highest bias current

Table 51. PA and PAbuffer Bias Current Setting.

LF_High_PM

LF_CAP1

LF_CAP0

Max. achievable Phase

Margin

5.4pF

1.8pF

10.8pF

3.6pF

21.6pF

7.2pF

32.4pF

10.8pF

1.8pF

21.6pF

3.6pF

32.4pF

5.4pF

Table 52. Loop Filter Capacitors Values.

MICRF405 Datasheet(PDF) 40 Page - Micrel Semiconductor

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