RF2498 데이터 시트보기 (PDF) - RF Micro Devices
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RF2498 Datasheet PDF : 20 Pages
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RF2498
Evaluation Board Current Measurement
BAND IF
LNA
MIX
IP TX BUFF
/2
SEL SEL ENABLE GAIN GAIN SET ENABLE SELECT
CDMA Cellular-
High IIP3 LNA Mode*
LNA On, Mixer Preamp On,
0
1
1
1
1
1
0
1
TX Buffer Off, /2 Off
LNA On, Mixer Preamp Off,
0
1
1
1
0
1
0
1
TX Buffer Off, /2 Off
LNA Bypassed, Mixer Preamp On,
0
1
1
0
1
X
0
1
TX Buffer Off, /2 Off
LNA Bypassed, Mixer Preamp Off,
0
1
1
0
0
X
0
1
TX Buffer Off, /2 Off
FM/JCDMA -
Low Current LNA Mode
LNA On, Mixer Preamp On,
0
0
1
TX Buffer Off, /2 Off
LNA On, Mixer Preamp Off,
0
0
1
TX Buffer Off, /2 Off
LNA Bypassed, Mixer Preamp On,
0
0
1
TX Buffer Off, /2 Off
LNA Bypassed, Mixer Preamp Off,
0
0
1
TX Buffer Off, /2 Off
CDMA PCS -
High IIP3 LNA Mode*
LNA On, Mixer Preamp On
TX Buffer Off, /2 Off*
1
1
1
S 1
1
0
0
1
N 1
0
0
0
1
0
1
X
0
1
IG 0
0
X
0
1
DES 1
1
1
0
1
LNA On, Mixer Preamp Off
TX Buffer Off, /2 Off*
LNA Bypassed, Mixer Preamp On
TX Buffer Off, /2 Off
LNA Bypassed, Mixer Preamp Off
TX Buffer Off, /2 Off
GPS
1
1
1
1
1
1
1
1
0
NEW 1
1
0
0
1
1
X
0
X
0
0
0
1
1
1
LNA On, Mixer On
1
0
1
X
X
0
0
R NOTES:
All IDC current numbers include bias circuitry current of 1.5mA to 2.0mA (dependent on mode).
O TX Buffer On: Add 2mA to total current.
F /2 Select On: Add 2mA to total current.
X
“X” denotes setting does not impact current.
NOT *For Paging mode set IPSET=0. Total current reduced 2mA.
IDC
(mA)
27.0
22.0
20.5
15.5
25.0
20.0
20.5
15.5
27.5
25.5
21.0
16.0
24.0
8-306
Rev A4 070308
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