TDA5235
Reference
#
Parameter
Symbol
Limit Values
Unit Test Conditions
Remarks
min. typ. max.
G2.8 digital RSSI error,
user trimmed via
DRSSIdig_t -1
+1
dB
RSSI register readout
■
SFRs RSSISLOPE
and RSSIOFFS
G2.9 digital RSSI slope,
untrimmed
dVRSSI
dVmix_in
/
2
2.5
2.5
3
LSB
/dB
RSSI register readout;
typical 600 mV/60 dB =
10 mV/dB,
1mV = 1 LSB (10-bit ADC)
8-bit readout: 4mV=1LSB
G2.10 digital RSSI slope,
user trimmed via
dVRSSI
dVmix_in
/
2.35
2.65
LSB
/dB
RSSI register readout;
typical 600 mV/60 dB =
10 mV/dB,
1mV = 1 LSB (10-bit ADC)
8-bit readout: 4mV=1LSB
■
SFRs RSSISLOPE
and RSSIOFFS
G2.11 Resistive load at
RSSI pin
RL,RSSImax 100
CL,RSSI
kΩ
■
■
G2.12 Capacitive load at
RSSI pin
20
pF
G3
2nd IF Filter (3rd order Bandpass Filter)
G3.1 Center frequency
fcenter
262
274
288
kHz
kHz
Asymmetric BPF corners:
f_center=sqrt(flow * fhigh);
Use AFC for more
symmetry
G3.2 -3 dB BW
BW-3dB
50
■
80
125
200
300
G3.3 -3 dB BW tolerance tol_BW-3dB -5
G3.4 -3 dB BW tolerance tol_BW-3dB -6
+5
+6
%
%
For BW = 125, 200, 300
kHz
■
■
For BW = 50, 80 kHz
Data Sheet
142
V1.0, 2010-02-19
INFINEON [ Infineon ]
