SA58646 Datasheet, PDF (31/42 Pages) NXP Semiconductors – UHF 900 MHz transceiver IC

NXP Semiconductors
SA58646
UHF 900 MHz transceiver IC
Table 28. Synthesizer …continued
V_CC = 3.3 V; T_amb = 25 °C; unless otherwise specified.
Symbol
Parameter
Conditions
V_o(p-p)
peak-to-peak output voltage CLKO = 1; 10 MHz at 5 pF
(or 5 MHz at 10 pF)
CLKO = 0; 10 MHz at 10 pF
10-bit reference divider
D/D_ref
reference divider ratio
TX and RX prescaler and main dividers
REF_DIV[9:0]
f_i(RF)
RF input frequency
D/D_main
main divider ratio
RX_MDIV[9:0]; TX_MDIV[9:0]
D/D_ps
prescaler divider ratio
RX_PRE[5:0]; TX_PRE[5:0]
RX and TX charge pump: pins RXPD and TXPD
I_o(cp)
charge pump output current RX_CP = 0; TX_CP = 0
RX_CP = 1; TX_CP = 1
C_o
output capacitance
Voltage doubler
V_O(VCP)
output voltage on pin VCP DOUBLER = 1; V_CC = 3 V
Min Typ Max Unit
-
1.5 -
V
-
1.5 -
V
8
-
1023
902 903 928 MHz
8
-
1023
64
-
127
-
±400 -
µA
-
±800 -
µA
-
-
8
pF
-
5.2 -
V
Table 29. RX baseband
V_CC = 3.3 V; T_amb = 25 °C; see Figure 6.
V_VB = 1.5 V; f_i = 1 kHz; RX gain set for 0 dB gain at −20 dBV on pin RXAI; earpiece volume at +4.7 dB; 560 pF between pins
EARI and EARO; 150 Ω in series with 10 µF on pin EARO; all measured with a ITU-T filter except THD; unless otherwise
specified.
Symbol
Parameter
Conditions
Min Typ Max Unit
RX audio path: RX gain adjust, mute and expander
THD
NF_M
total harmonic distortion
peak noise figure
V_RXAI = −20 dBV
B = 300 Hz to 3.4 kHz
-
0.2 2
%
-
−83 -
dBV
Input: pin RXAI
V_i(max)
Z_i
maximum input voltage
input impedance
THD < 4 %
in TX mode
in RX mode
-
13
-
[1] _-
15
-
[1] ₁₀₀
-
-
dBV
kΩ
kΩ
RX audio gain adjust
∆G_adj
gain adjustment range
RX_GAIN[4:0]
on RX gain amplifier
−7.5 -
+8
dB
on pin EARO
−15 -
+16
dB
N_{step(G_adj)}
number of gain adjustment
steps
-
32
-
α_mute
mute attenuation
V_RXAI = −20 dBV
-
−70 −60
dB
Expander
G_expdr
expander gain
V_RXAI = −20 dBV
−1
0
+1
dB
SA58646_1
Product data sheet
Rev. 01 — 8 February 2007
© NXP B.V. 2007. All rights reserved.
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