U4091BM-N Datasheet, PDF (30/38 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.
Unit
Noise at line phosphometrically
weighted
I_L ≥ 14 mA, MICG[0:1] = 2
AGATX[0:2] = 7
no
- 73
- 70 dBmp
Anti-clipping:
attack time
release time
CTXA = 1 µF
each 3 dB overdrive
t_a
2
ms
t_r
80
ms
Gain at low operating current
I_L = 8 mA, I_MP = 1 mA
V_MIC = 0.5 mV
I_VMIC = 300 µA
G_T
45
48
dB
Distortion at low
I_L = 8 mA, I_MP = 1 mA
operating current
V_MIC = 5 mV
d_t
I_VMIC = 300 µA
5
%
Receiving Amplifier
I_L = 14 mA, V_GEN = 300 mV,
ERX = ETX = ENMIC = ENSTBAL = I1O1 = I3O3 = 1, SL[0:1] = 0, LF[0:3] = 1, P[0:4] = 31, AFS[0:5] = 54, AGARX[0:2] = 0
Adjustment range of
receiving gain
Single ended,
I_L ≥ 14 mA, Mute = 1,
EA[0:4] = 2 - 31
AGARX[0:2] = 0 - 7
G_R
-19
+17
dB
Receiving amplification
Differential
AGARX[0:2] = 0
EA[0:4] = 15
EA[0:4] = 31
G_R
-1
0
1
dB
14.7
15.7
16.7
dB
Frequency response
Gain change with current
Gain deviation
Ear protection differential
I_L ≥ 14 mA, f = 1 kHz to 3.4 kHz
I_L = 14 to 100 mA
T_amb = -10 to +60° C
I_L ≥ 14 mA,
V_GEN = 11 V_rms
EA[0:4] = 15
∆G_RF
-1
∆G_R
∆G_R
EP
0
dB
±0.5
dB
±0.5
dB
3
V_rms
MUTE suppression
(earpiece disconnect from matrix)
I_L = 14 mA, I303 = 0
∆G_R
60
dB
Output voltage
d < 2% differential
I_L = 14 mA
Z_ear = 68 nF + 100 Ω
EA[0:4] = 11
0.775
V_rms
Maximum output
current d < 2%
Z_ear = 100 Ω
EA[0:4] = 31
I_out
4
mA_p
Receiving noise
phosphometrically weighted
I_L = 14 mA
Z_ear = 68 nF + 100 Ω
EA[0:4] = 15
- 79
- 76 dBmp
Side tone suppression
Z = 600 Ω
20
dB
Output resistance
Each output against GND
Ro
10
Ω
Gain at low operating
current (receive only)
I_L = 6.5 mA, I_MP = 1 mA
I_M = 300 mA
V_GEN = 200 mV
EA[0:4] = 21,
ENMIC = ETX = I101 = 0
G_R
-2
0
2
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
30 U4091BM-N
4666B–CORD–08/04