U3600BM Datasheet, PDF (15/43 Pages) ATMEL Corporation – SINGLE CHIP CORDLESS TELEPHONE IC

U3600BM
Electrical Characteristics (Continued)
T_amb = +25°C, VRF = VAF = RFOVB = 3.6 V, all bits set to “0”, unless otherwise specified. Test circuit, see Figure 7.
Parameters
Test Conditions
Symbol Min.
Typ.
Max.
Unit
Release time
VCOIN = step 126 mV –> 31.6 mV
(-18 dBV –> -30 dBV)
measure time after step, when output
voltage has 0.75 times of final value
14.4
ms
Input resistance
14
19.5
26
kW
Splatter Amplifier ETX = 1
Open loop gain
90
dB
Gain bandwidth product
150
kHz
Maximum output voltage
swing
2.4
Vpp
Limiter Amplifier ETX = 1, Tj = 25°C
Gain for signals below
limitation
Distortion for signals below
limitation
Maximum output voltage
swing (above limitation,
clipping)
LIMIN –> TXO,
20 mV_RMS applied to LIMIN (AC coupled)
LIMIN –> TXO,
20 mV_RMS applied to LIMIN (AC coupled)
26
dB
2
%
1.8
2.1
2.35
V_pp
Input resistance at LIMIN
15
20
25
kW
Remark:
The gain and maximum output voltage swing of the limiter amplifier changes with temperature to compensate the temperature
dependancy of MODIN (“tx conversion gain” of RF transmit part), fundamentally determined by the structure of the circuitry.
RF Transmitter ETXO = EVCO1 = EVCO2 = EVCO3 = EOSC = 1; T_j = 25°C
MODIN input impedance
RFO output impedance
Load = 200 ø
70
100
130
kW
230
300
390
W
RFO output voltage level
ETXO = 0; no load
0.3
V
Highest operating frequency USA Base Channel 9 (US1b9)
49.99
00
MHz
TX conversion gain
MODIN - RFO
For the complete programming see
“Channel Frequencies, Dividers and
Country Settings” on page 19“
USA1:
GMOD[1:0] = 00; fMod = ~7.6 MHz
5.2
kHz/V
USA2:
GMOD[1:0] = 01; fMod = ~5.7 MHz
5.2
kHz/V
France:
GMOD[1:0] = 01; fMod = 4.3 MHz
GMOD[1:0] = 00; fMod = 4.3 MHz
3.8
kHz/V
2.7
kHz/V
Demodulated distortion THD
MODIN - RFO
Spain/Netherlands:
GMOD[1:0] = 10; fMod = 1.8 MHz
Modulation frequency: 1 kHz
US: DF = 4.0 kHz
France: DF = 2.5 kHz
7.9
kHz/V
1.5
5
%
15
4516C–CT0–08/02