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RF2460
Rev B6 DS080128
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
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Special Instructions (Board loss, taking into consideration description in the schematic)
LNA
VCC1=VCC2=Enable=2.75V; Mix Gain=0.0V
To measure ICC LNA only:
LNA Gain was switched between 0V and 2.75V, and record the delta current.
Mixer
VCC1=VCC2=Enable=Mix Gain=2.75V; LNA Gain=0.0V
To measure ICC Mixer (LNA should be in bypass mode and LO signal should be present):
Mixer Current=Total IC Current-LO Circuitry (~4.23mA) (See “Current Measurement” section for more details)
VCC2 only affects LO current buffer and R6 doesn’t affect the mixer current.
Instructions (Board loss, taking into consideration description in the W-CDMA schematic)
LNA
ICC LNA current=total current (VCC=LNA Gain=2.75)-total current (VCC=2.75; LNA Gain=0)
To measure ICC LNA only:
LNA Gain was switched between 0V and 2.75V, and record the delta current.
Mixer
ICC Mix and Bias Current=Total Current (VCC1=EN=VCC2=Mix Gain=2.75; LNA Gain=0)-total current (VCC1=EN=2.75; Mix
Gain=LNA Gain=VCC2=0)
LO signal should be present. VCC2 only affects LO current buffer and R6 doesn’t affect the mixer current.
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