U3761MB-T Datasheet, PDF (21/27 Pages) ATMEL Corporation – Universal Telephone IC - All Functions Integrated

U3761MB-T
Electrical Characteristics: Speech Circuit (Continued)
Reference point pin GND, f = 1000 Hz, 0 dBm = 775 mV_rms, R_DC = 39 W/1 W, T_amb = 25°C, unless otherwise specified, refer
to "Basic Test Circuit". CLIM = GND
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Unit
Receiving Amplifier
Gain
Gain change with current
Gain deviation
Line-loss compensation
Receiving noise at earphone
weighted psophometrially
I_L ³ 20 mA
I_L = 20 to 60 mA
R_AGC = infinite
T_amb = -10 to +60°C
I_L = 20 mA
I_L = 73 mA
I_L = 73 mA
G_R
DG_R
DG_R
DG_R
n_i
3
5
dB
-0.5
0.5
dB
-0.3
0.7
dB
-7
-6
-4.7
dB
-77.5
-71
dBm
Gain change when muted
Output voltage push-pull
I_L ³ 20 mA
I_L ³ 20 mA, Z_ear = 68 nF, 100 W in
series, d £ 2%
G_RM
24
29
34
dB
V_RECO
0.8
0.9
V_rms
Ear protection differential
I_L = 40 mA, V_gen = 4 V_rms, Z_ear =
68 nF + 100 W
V_ear
1.3
1.6
2.5
V_rms
Supply Voltage (For Internal Use Only)
Output voltage
Note: Output must be limited
externally to 5.5 V maximum
I_L ³ 20 mA dialing mode
V_DD
2.0
6.3
V
Available current for peripherals
I_L ³ 20 mA dialing mode
I_DD
150
µA
Transmit
Maximum output voltage swing at
line
I_L = 20 mA, V_MIC = 50 mV_rms
V_{L max}
3.4
4
Vpp
Mute suppression transmit with
privacy function
I_L = 20 mA
G_SPRIV
60
dB
DC Characteristics Dialer
V_DD = 2.7 V, f_OSC = 3.58 MHz, all outputs unloaded, S9 closed; HKS = 1
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Unit
Memory retention current
Data retention voltage
HKS = 0, V_DD = 1.0 V
I_MR
0.1
µA
0.5
V
DTMF distortion
DP output sink current
Keyboard input drive current
Keyboard input sink current
Key on resistance
Key off resistance
Mask sink/drive current
Earth sink/drive current
R_L = 5 kW
V_PO = 0.5 V
V_I = 0 V
V_I = 2.7 V
d
-30
-23
dB
I_PL
0.5
mA
I_KD
20
µA
I_KS
500
µA
R_KON
5
kW
R_KOFF
100
kW
I_M H/L
0.5
mA
I_e H/L
0.5
mA
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4744A–CORD–09/03