TDA5225 Datasheet, PDF (90/176 Pages) Infineon Technologies AG – Enhanced Sensitivity Multi-Channel Quad-Configuration Receiver

TDA5225
Reference
# _Parameter
Symbol Limit Values Unit
G2.8
G2.9
digital RSSI error,
user trimmed via
SFRs RSSISLOPE
and RSSIOFFS
digital RSSI slope,
untrimmed
min. typ.
DRSSI_{dig_t} -1
dV_RSSI/
2
2.5
dV_{mix_in}
max.
+1
dB
3
LSB
/dB
G2.10 digital RSSI slope, dV_RSSI/
2.35 2.5
2.65 LSB
user trimmed via
dV_{mix_in}
/dB
SFRs RSSISLOPE
and RSSIOFFS
G2.11 Resistive load at
R_L,RSSImax 100
kΩ
RSSI pin
G2.12 Capacitive load at
RSSI pin
C_L,RSSI
20
pF
G3 2nd IF Filter (3rd order Bandpass Filter)
G3.1 Center frequency
f_center
262 274 288 kHz
G3.2 -3 dB BW
BW_-3dB
50
kHz
80
125
200
300
G3.3 -3 dB BW tolerance tol_BW_-3dB -5
+5
%
G3.4 -3 dB BW tolerance tol_BW_-3dB -6
+6
%
Test Conditions
Remarks
RSSI register readout
■
RSSI register readout;
typical 600 mV/60 dB =
10 mV/dB,
1mV = 1 LSB (10-bit ADC)
8-bit readout: 4mV=1LSB
RSSI register readout; ■
typical 600 mV/60 dB =
10 mV/dB,
1mV = 1 LSB (10-bit ADC)
8-bit readout: 4mV=1LSB
■
■
Asymmetric BPF corners:
f_center=sqrt(f_low * f_high);
Use AFC for more
symmetry
■
For BW = 125, 200, 300 ■
kHz
For BW = 50, 80 kHz
■
Data Sheet
90
V1.0, 2010-02-19