8 - maxim integrated · validate performance with sc2200 evb on target pa x ensure that power...
TRANSCRIPT
................................................................................................................................................................ 5
................................................................................................................................................... 6
............................................................................................................................................................ 6
........................................................................................................................................... 7
......................................................................................................................................... 8
................................................................................................................................................. 9
..................................................................................................................................... 10
...................................................................................................................... 10
...................................................................................................... 11
............................................................................................................................................ 11
............................................................................................................... 13
........................................................................................................ 13
..................................................................................................................... 13
.................................................................................................... 14
.................................................................................................................................................. 15
......................................................................................................................................... 15
.............................................................................................................................................. 15
........................................................................................................................... 16
......................................................................................................................... 16
.................................................................................................................. 17
............................................................................................................... 17
.................................................................................................................. 17
......................................................................................................................................................... 18
............................................................................................................................... 18
................................................................................................................................ 19
....................................................................................................................... 19
.............................................................................................................. 20
...................................................................................................................................... 20
.................................................................................................................................................... 20
......................................................................................................................................................... 21
............................................................................................................................................. 21
........................................................................................................................................... 21
.............................................................................................................................................. 21
.............................................................................................................................................. 21
....................................................................................................................................................... 22
........................................................................................................... 22
......................................................................................................... 22
................................................................................................................................................................ 23
............................................................................................................................................... 23
.............................................................................................................................................................. 23
.............................................................................................................................. 23
.............................................................................................................................................. 23
................................................................................................................................. 24
................................................................................................. 25
.................................................................................................................................. 25
....................................................................................................................................................... 26
.................................................................................................................................................................. 27
........................................................................................................... 27
.......................................................................................................................................... 28
........................................................................................................................ 5
............................................................................................... 8
........................................................................................... 9
................................................................................................ 10
................................................................................................................................................... 11
.................................................................................. 12
....................................................................... 12
................................................................................................... 15
................................................................................................................ 16
................................................................................................................................ 18
............................................................................................................. 18
......................................................................................................................... 19
...................................................................................................................... 19
................................................................................................................................ 20
....................................................................................................................................... 22
...................................................................... 24
.................................................................................................. 25
............................................................................................................. 14
....................................................................... 15
..................................................................................................................................... 16
............................................................................................................................ 17
................................................................................................................................. 24
............................................................................................................................................ 26
................ 27
............................................................................ 28
Validate
Performance with
SC2200 EVB on
target PA
· Ensure that power levels are
correct (RFIN, RFINDLY, RFFB,
RFOUT and coefficient levels)
using the GUI.
Refer to
“SC2200
Release Notes”
Integrate SC2200
in prototype, PVT
system validation
This document,
“SC2200 Release Notes”, SPI Programming Guide
· Select/place critical RF
components(Couplers,
Attenuators, Pre-Amplifier), Ensure
that power levels are correct over
PVT (RFIN, RFINDLY, RFFB,
RFOUT and coefficient levels)
using the GUI.· Place power supplies, decoupling
and select regulators.
· Select/place the clock reference
circuit (crystal or external clock).
· Place non critical signals (digital
control signals…).
Qualification, field
trial...
Down
converters and
ADC’s
Digital Signal
Processor
Datapath A
RFSP
PA
RFINA
RFOUTA
To RxCORR
Monitor Path
Datapath B
RFSP
PA
RFINB
RFOUTB
RFFBB
To RxCORR
ANTA
ANTB
SC2200
RFFBA
d
+
+
PDET
PDET
RFINDLYA
RFINDLYB
d
Att.
Att.
PA Driver
PA Driver
SC2200 Reference Design
XTALI
RFINA
RFINB
EXTCLK
SP
I
INT
RN
XTALO
MS
0
MS
1
RE
SE
TN
DV
DD
IO,
DV
DD
18
,
AV
DD
18
5V
Regulator
RF delay is
optional
RF delay is
optional
Host
NC
5dB
Coupler
5dB
coupler
Optional
Crystal
1.8V
Pre-amp
Pre-amp
-5dB
-2dB
-5dB
-2dB
Att
Attenuation
Att
Attenuation
·
o
o
o
·
o
o
o
RFINARFOUTARFAUXA
RFFBA
RFFBB
RFAUXB RFOUTB RFINB
Crystal (Optional)
SC2200 IC
With Delay Line
section
No Delay line
section
3ns RF Delay Lines
Down
converters and
ADC’s
Digital
processor
Datapath A
RFSP
PA
RFINA
RFOUTA
To RxCORR
Monitor Path
ANTASC2200
RFFBA
+
PDET
RFINDLYA
Att.
PA Driver
-2dB
Datapath B
-5dB
+10dB typ.
RF
delay
-5dB@
2700MHz
5dB
coupler
39Ω To PA input
197Ω
From RFPAL RFOUT output
NTC pi - attenuator
197Ω
R_NTC
Figure 5: NTC Attenuator
≤
·
·
Transmitter
wanted
signal (fRF)
RFOUT
signal
power
Transmitter
noise and
residual IM +
SC2200 noise
(fNOISE)
SC2200 LO
leakage (fLO)SC2200 VCO
leakage (fVCO)
SC2200 digital
noise and
external power
supply leakage
(fLF)
Frequency
1
LF
LO RF
NOISE RF
Noise
RF VCO
RF
RF
RF
MIN MAX
LO MIN MAX
VCO
RFOUT
signal
powerSC2200 LO
leakage (fLO)
SC2200 VCO
leakage (fVCO)
Frequency
Scanning
spurs
fMIN fMAX
MIN MAX
MIN MAX
FR406 – 14 +/- 1mil
FR4-Pre-Preg
FR406 – 14 +/- 1mil
62 +/- 10%
Layer1
Layer2
Layer4
Layer3
Figure 10: PCB Fabrication Layer Stack
5.2.1. Layer 1: RF and Signals
5.2.2. Layer 2: Ground Plane
·
·
·
·
·
·
·
·
(a)
(b)
(c)
(d)
(a) Poor: trace cuts ground plane and prevents direct returns(b) Better: Perimeter trace avoids cutting ground plane. Best solution is not signal trace in ground plane(c) Poor: slot cuts ground plane and prevents direct returns(d) Better: via string maintains ground plane continuity
5.2.3. Layer 3: Power Supply Plane
VDD18 Power Plane
(1.8V)
DVDDIO Power plane
GND Via Array under
SC2200
5.2.4. Layer 4: Ground Plane and signals
SC2200Solder
PCB
Via
Case temperature
measurement point
Heat transfer
· JC
·
·
·
·
Ω
·
·
PKPK
PKPK Ω Ω PKPK PKPK
OUT
R2XTALI
XTALO (do not connect)
R1
R2
81 GND paddle
SC2200 C1Zout
EXTCLK
Clock buffer
LOAD
HOST
SCLKSDISDOSSN0
10k
DVDDIO
SSN1SSN2CLOAD
SC2200
SSCLKSSDI
SSDOSSSN
SC2200
SSCLKSSDI
SSDOSSSN
SC2200
SSCLKSSDI
SSDOSSSN
Optional buffer(a)
0 Ω
SCLK
SDI
SDO
SSSN
0 Ω (unloaded)
0 Ω
12 pin connector recommended for debug with Scintera GUI
...
·
Page 29 of 29
Ω
Ω
Ω
Ω
This document contains confidential information proprietary to Maxim Integrated Products, Inc., and is provided under a non-disclosure agreement. Unauthorized copying or distribution is prohibited. Maxim Integrated and Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. All other trademarks are the property of their respective owners. No circuit patent licenses are implied. Maxim Integrated Products, Inc. reserves the right to change its product specifications at any time. © 2016, Maxim Integrated Products, Inc. All Rights Reserved.