U4091BM-N Datasheet, PDF (32/38 Pages) ATMEL Corporation – PROGRAMMABLE TELEPHONE AUDIO PROCESSOR

Electrical Characteristics (Continued)
f = 1 kHz, 0 dBm = 775 mV_rms, IVMIC = 0.3 mA, IMP = 3 mA, R_DC = 1.3 MΩ, T_amb = 25°C, Z_ear = 68 nF + 100 Ω,
RLS = 50 Ω, Z_M = 68 nF, resonator: f = 3.58 MHz, all bits in reset condition, unless otherwise specified.
Parameters
Test Conditions
Symbol
Min.
Typ.
Max.
Mute suppression
I_L = 15 mA, V_L = 0 dBm,
V_AMPB = 4 mV
VSAO
-56
I4O2 = 0
Gain change with current
Gain change with frequency
Attack time of anti-clipping
Release time of anti-clipping
Adjustment step of charge current
I_L = 15 to 100 mA
I_L = 15 mA
f = 1 kHz to 3.4 kHz
20 dB overdrive
ENSAO = 0, SE = 1
∆LSCUR[0:1] = 1
∆G_SA
∆G_SA
t_r
t_f
-1
-480
2
170
-400
1
0
-320
Adjustment step of
discharge current
ENSAO = 0, SE = 0
∆LSCUR[0:1] = 1
320
400
480
Charge current
Pin SAO2
ENSAO = 0, SE = 1
LSCUR[0:1] = 3
I_CHA
-1.45
-1.2
-0.95
Discharge current Pin SAO2
ENSAO = 0, SE = 0
LSCUR[0:1] = 3
I_DIS
0.95
1.2
1.45
Microphone Amplifier,
V_B = 5 V, V_MIC = 2 mV, V_MIC3 = 2 mV, ENMIC = ENAM = I1O4 = 1, MICHF = 0
Gain MIC amp.:
MIC1/2 Æ AMREC
MICG[0:1] = 0
17.4
18.1
18.8
MICG[0:1] = 1
23.2
23.7
24.6
MICG[0:1] = 2
29.1
29.8
30.5
MICG[0:1] = 3
35.0
35.7
36.4
MIC3 to AMREC
MICHF = 1, MICG[0:1] = 3
35.0
35.7
36.5
Input suppression:
MIC3 to MIC1/2
MICG[0:1] = 0, MICHF = 0
60
MIC1/2 to MIC3
MICHF = 1
60
Settling time offset-cancellers
5 τ , FOFFC = 0
9
12
Settling time offset-cancellers in
speed-up mode
5 τ , FOFFC = 1
1.8
2.4
AGC for Answering Machine, AMPB to AMREC,
ENAM = ENAGC = I4O5 = I5O4 = 1
Nominal gain
Maximum output level
Attack time
V_AMPB = 5 mV
V_AMPB = 50 mV, d< 5%
20 dB overdrive
23.5
25.5
27.5
240
300
360
1
Release time
45
Unit
dBm
dB
dB
ms
ms
µA
µA
mA
mA
dB
dB
dB
dB
dB
dB
dB
ms
ms
dB
mVp
ms
ms
Switching Matrix,
VL = 0, VB = 5 V, ENAM = I4O4 = 1, V_AMPB = 0.6 V_rms
Input impedance AMPB
50
60
70
kΩ
Gain AMPB to AMREC
-0.7
-0.3
0.1
dB
Note: 1. This is a space of time where the bus must be from data transmission and before a new transmission can be started
32 U4091BM-N
4666B–CORD–08/04