U3600BM_05 Datasheet, PDF (13/44 Pages) ATMEL Corporation – Single-chip Cordless Telephone IC

U3600BM
6. Electrical Characteristics (Continued)
T_amb = +25°C, VRF = VAF = RFOVB = 3.6V, all bits set to “0”, unless otherwise specified.
Test circuit, see Figure 8-1 on page 18. Crystal specifications, see table “Crystal Specifications”.
Parameters
Test Conditions
Symbol Min. Typ. Max.
Unit
Input 1-dB compression point
“Loaded” (330Ω with serial capacitance)
M1CP=0
M1CP=1
“unloaded”
M1CP=1
140
mV
40
mV
100
mV
Third order input intercept
point
“Loaded” (330Ω 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
kΩ
Input capacitance
MIX2IN to GND
2.5
3
3.5
pF
Output impedance
MIX2O
1200 1500 1800
Ω
Voltage gain
MIX2IN -> MIX2O
“Loaded” (1500Ω with serial capacitance)
13
15
17
dB
Input 1-dB compression point “Loaded” (1500Ω with serial capacitance)
32
mV
Third order input intercept
point
“Loaded” (1500Ω with serial capcitance)
80
mV
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
Release time
VEXIN = step 50 mV –> 25 mV
measure time after step, when output
voltage has 1.5 times of final value
16
ms
Input resistance
9.5
15
kΩ
Earpiece Amplifier, EEA = 1, ERX2 = 1, BEXP = 1; Apply Input Voltage to EXIN; Measure Differentially at RECO1/2
Minimum gain
GEA[4:0]=0
0
1
2
dB
Medium gain
GEA[4:0]=16
16
17
18
dB
Maximum gain
GEA[4:0]=31
31
32
33
dB
Gain adjust step
0.8
1
1.2
dB
Output voltage swing
Maximum gain; 1 kΩ load; increase input
voltage until distortion ≈ 5%
4.8
5
Vpp
Input resistance
7.3
12.5
kΩ
13
4516D–CT0–10/05