U3600BM Datasheet, PDF (12/43 Pages) ATMEL Corporation – SINGLE CHIP CORDLESS TELEPHONE IC

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. Crystal specifications, see table “Crystal Specifications”.
Parameters
Test Conditions
Symbol Min. Typ. Max.
Unit
Charge pump output current VPCLO = 1.25 V, output low
80
160
µA
VPCLO = 1.25 V, output high
-160
-80
µA
Charge pump leakage current VPCLO = 1.25 V, output tristate
-50
+50
nA
Receiver Input Mixer (Mixer1) EVCO3 = EOSC = 1
Input frequency range
20
50
MHz
Output frequency
10.7
MHz
Input resistance
MIX1IN1 / MIX1IN2 to GND
3.0
kW
Input capacitance
MIX1IN1 / MIX1IN2 to GND
3.5
pF
Output impedance
MIX1O
210
330
390
W
Voltage gain
Input noise voltage
MIX1IN1/2 -> MIX1O
“Loaded” (330 W with serial capacitance)
“Unloaded”
11.5
17.5
9
dB
dB
nV Hz^–1/2
Input 1-dB compression point
“Loaded” (330 W with serial capacitance)
M1CP=0
M1CP=1
“unloaded”
M1CP=1
140
mV
40
mV
100
mV
Third order input intercept
point
“Loaded” (330 W with seial capacitance)
M1CP=0
430
mV
IF Mixer (Mixer2) EOSC = ERXHF = 1; input frequency: 10.7 MHz
Input resistance
MIX2IN to GND
2.0
3.0
4.0
kW
Input capacitance
MIX2IN to GND
2.5
3
3.5
pF
Output impedance
MIX2O
1200 1500 1800
W
Voltage gain
MIX2IN -> MIX2O
“Loaded” (1500 W with serial capacitance)
13
15
17
dB
Input 1-dB compression point “Loaded” (1500 W with serial capacitance)
32
mV
Third order input intercept
“Loaded” (1500 W with serial capcitance)
80
mV
point
IF Amplifier and Demodulator ERXHF=1, ERX1=1, ERXO=1; Input signal: 450 kHz, 500 µV, FM-modulation frequency = 1 kHz
Recovered audio at RXO,
demodulator gain
GDEM=0
GDEM=1
180
mV/kHz
90
mV/kHz
AM rejection ratio
30% AM, 2.5 kHz FM
35
dB
Expander ERX2 = 1; 470 nF from ETC to GND (VSS)
Gain reference level = G.R.L.
(gain = 0 dB)
70
80
90
mVrms
Gain versus input signal level
(“gain tracking”)
VEXIN = 10 dB less than G.R.L.
VEXIN = 20 dB less than G.R.L.
VEXIN = 30 dB less than G.R.L.
–11
–10
–9
dB
–21
–20
–19
dB
–35
–30
–25
dB
Attack time
VEXIN = step 25 mV –> 50 mV
measure time after step, when output
voltage has 0.75 times of final value
16
ms
12 U3600BM
4516C–CT0–08/02