U4090B-P Datasheet, PDF (16/35 Pages) ATMEL Corporation – Monolithic Integrated Feature Phone Circuit EMI Improved

6. Electrical Characteristics (Continued)
f = 1 kHz, 0 dBm = 775 mV_rms, I_M = 0.3 mA, I_MP = 2 mA, RDC = 130 kΩ, T_amb = 25°C, RGSA = 560 kΩ,
Z_ear = 68 nF + 100Ω, Z_M = 68 nF, pin 31 open, V_IMPSEL = GND, V_MUTX = GND, V_MUTR = GND, unless otherwise specified.
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Gain at low operating current
I_L = 10 mA
I_MP = 1 mA
I_M = 300 µA
V_GEN = 560 mV
RDC = 68 kΩ
G_R
–2
–1
0
AC impedance
Distortion at low operating current
V_IMPSEL = GND
V_IMPSEL = V_MP
I_L = 10 mA
I_MP = 1 mA
V_GEN = 560 mV
RDC = 68 kΩ
Z_imp
570
600
640
Z_imp
840
900
960
dR
5
Speaker Amplifier
Minimum line current for operation
Input resistance
No AC signal
Pin 24
I_Lmin
15
14
22
Gain from SAI to SAO
Output power
Output noise (Input SAI open)
psophometrically weighted
V_SAI = 3 mV
I_L = 15 mA
R_GSA = 560 kΩ
R_GSA = 20 kΩ
Load resistance
R_L = 50Ω, d < 5%
V_SAI = 20 mV
I_L = 15 mA
I_L = 20 mA
I_L > 15 mA
G_SA
35.5
36.5
37.5
–3
P_SA
3
7
P_SA
20
n_SA
200
Gain deviation
I_L = 15 mA, T_amb = –10 to +60° C
∆G_SA
±1
Mute suppression
I_L = 15 mA
V_L = 0 dBm
V_SAI = 4 mV
Pin 23 open
V_SAO
–60
Gain change with current
Resistor for turning off speaker
amplifier
I_L = 15 to 100 mA
I_L = 15 to 100 mA
∆G_SA
±1
RG_SA
0.8
1.3
2
Gain change with frequency
Attack time of anti-clipping
I_L = 15 mA, f = 300 to 3400 Hz
20 dB over drive
∆G_SA
tr
±0.5
5
Release time of anti-clipping
tf
80
DTMF Amplifier Test Conditions: IMP = 2 mA, IM = 0.3 mA, V_MUTX = VMP
Adjustment range of DTMF gain
I_L = 15 mA mute active
G_D
DTMF amplification
I_L = 15 mA
V_DTMF = 8 mV
G_D
Mute active: MUTX = V_MP
Gain deviation
I_L = 15 mA, T_amb = –10 to +60°C
G_D
Input resistance
R_GT = 27 kΩ
R_GT = 15 kΩ
R_i
Distortion of DTMF signal
I_L ≥ 15 mA
V_L = 0 dBm
d_D
40
50
40.7
41.7
42.7
±0.5
60
180
300
26
70
130
2
Unit
dB
Ω
Ω
%
mA
kΩ
dB
mW
µV_psoph
dB
dBm
dB
MΩ
dB
ms
ms
dB
dB
dB
kΩ
%
16 U4090B-P
4741C–CORD–11/05