MAX7032 Maxim Integrated Products, MAX7032 Datasheet - Page 28

• Manufacturer Part Number: MAX7032
• Description: ASK/FSK Transceiver
• Manufacturer: Maxim Integrated Products

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Low-Cost, Crystal-Based, Programmable,
ASK/FSK Transceiver with Fractional-N PLL
Keeping the traces short also reduces parasitic induc-
tance. Generally, 1in of PC board trace adds about
20nH of parasitic inductance. The parasitic inductance
can have a dramatic effect on the effective inductance
of a passive component. For example, a 0.5in trace
connecting to a 100nH inductor adds an extra 10nH of
inductance, or 10%.
28
C4
______________________________________________________________________________________
*OPTIONAL POWER-ADJUST RESISTOR
C2
C8
C1
L2
R3*
C3
C5
L3
L1
C23
C24
C7
3.0V
V
C22
DD
C6
L6
L4
V
V
DD
DD
1
2
3
4
5
6
7
8
TX/RX1
TX/RX2
PAV
ROUT
PAOUT
AV
LNASRC
LNAIN
DD
DD
C21
32
9
Y1
10
31
C10
C20
L5
C9
C11
11
30
To reduce parasitic inductance, use wider traces and a
solid ground or power plane below the signal traces.
Also, use low-inductance connections to the ground
plane, and place decoupling capacitors as close to all
V
MAX7032
V
C12
EXPOSED
DD
DD
PADDLE
29
12
pins and HV
IN
28
C13
GND
13
Y2
27
V
Typical Application Circuit
DD
14
OUT
26
IN
15
C18
as possible.
25
C14
16
ENABLE
DATA
RSSI
OP+
DS+
DS-
C15
T/R
DF
R1
R2
C19
24
23
22
19
18
17
21
20
C17
SCLK
CLOCK
OUTPUT
TRANSMIT/
RECEIVE
CS
ENABLE
DIO
DATA
C16