CC2590 Datasheet, PDF (6/18 Pages) Texas Instruments – 2.4-GHz RF Front End, 14-dBm output power

CC2590
SWRS080 – SEPTEMBER 2008 ........................................................................................................................................................................................ www.ti.com
CC2590EM Evaluation Module
VDD
C161
VDD
C101/C102
VDD
C131/C132
= PCB trace inductor
SMA
C112
L111
C111
ANT
CC2590
RFc_P
RF_P
RXTX ^RRXXTTXX
RF_N ^RRFF__NN
PAEN
EN
HGM
R151
LDB182G4520C-110
Balun
C2
SMA
PAEN
EN
HGM
RXTX
Figure 2. CC2590EM Evaluation Module
Table 2. List of Materials (See CC2590EM Reference Design)
DEVICE
L112
C111
C112
C161
C101/C102
C131/C132
C2
TL101 ⁽¹⁾
TL131
R151
FUNCTION
VALUE
Part of antenna match.
1.5 nH: LQW15AN1N5B00 from Murata
Part of antenna match.
0.5 pF, GRM1555C1HR50BZ01 from Murata
DC block.
47 pF, GRM1555C1H470JZ01 from Murata
Decoupling capacitor.
1 nF: GRM1555C1H102JA01 from Murata
Decoupling. Will affect PA resonance. See CC2590EM reference
design for placement.
27 pF || 1 nF. The smallest cap closest to CC2590.
27 pF: GRM1555C1H270JZ01 from Murata
1 nF: GRM1555C1H102JA01 from Murata
Decoupling. Will affect LNA resonance. See CC2590EM reference
design for placement.
18 pF || 1 nF. The smallest cap closest to CC2590.
18 pF: GRM1555C1H180JZ01 from Murata
1 nF: GRM1555C1H102JA01 from Murata
Decoupling of external balun
1 nF: LWQ15AN1N5B00 from Murata
Transmission line. Will affect PA resonance. (simulated inductance: See CC2590EM reference design.
0.87nH)
Transmission line: Length ≈ 40 mil, Width = 8 mil
Transmission line. Will affect LNA resonance. (simulated inductance: See CC2590EM reference design.
1.64nH)
Transmission line: Length ≈ 100 mil, Width = 8 mil
Bias resistor
4.3 kΩ: RK73H1ETTP4301F from Koa
(1) Transmission lines are measured from edge of pad of the CC2590 footprint to edge of pad of DC coupling capacitor. The length of the
transmission lines depend on the distance to the ground plane. If another PCB stack up is chosen the length of the transmission lines
needs to be adjusted.
PCB description: 4 layer PCB 1.6mm
Copper 1: 35 µm
Dielectric 1-2: 0.35 mm (e.g. 2x Prepreg 7628 AT05 47% Resin)
Copper 2: 18 µm
Dielectric 2-3: 0.76 mm (4 x 7628M 43% Resin)
Copper 3: 18 µm
Dielectric 3-4: 0.35 mm (e.g. 2x Prepreg 7628 AT05 47% Resin)
Copper 4: 35 µm
DE104iML or equivalent substrate (Resin contents around 45%, which gives Er=4.42 at 2.4GHz, TanD=0.016)
6
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