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參數資料
| 型號： | U4080B |
| 英文描述： | Voice-Switched Circuit for Handsfree Operation |
| 中文描述： | 語音電路交換的免提操作 |
| 文件頁數： | 11/15頁 |
| 文件大小： | 169K |
| 代理商： | U4080B |
U4080B
Preliminary Information
TELEFUNKEN Semiconductors
Rev. A1, 20-May-96
11 (15)
4
6
8
10
0
10
20
30
40
12
5 mW
20 mW
50 mW
80 mW
100 mW
I
1
V
16
( V )
94 7878 e
T
amb
= 25
°
C
Figure 13.
V
CC
(Pin 20) is a regulated output voltage of
5.4 V
0.5 V. Regulation will be maintained as long as
V+ is (typically) 80 mV greater than the regulated value
of V
CC
. Up to 3 mA can be sourced from this supply for
external use. The output impedance is
capacitor indicated for connection to Pin 20 is essential
for stability reasons. It must be located adjacent to the IC.
If the circuit is deselected (see the section on chip select),
the V
CC
voltage will go to 0 V.
If the integrated circuit, U4080B, is to be powered from
a regulated supply (not the Tip and Ring lines) of less than
6.5 V, the configuration of figure 14 may be used so as to
ensure that V
CC
is regulated. The regulated voltage is
applied to both V+ and V
CC
, with CS held at a logic 1 so
as to turn off the internal regulator (the Chip Select
function is not available when the circuit is used in this
manner). Figure 15 indicates the supply current by this
configuration, with no signal at the speaker. When a
signal is sent to the speaker the curves of figure 13 apply.
20
. The 47
μ
F
200 F
20
22
16
18
U 4080 B
V+
94 7883 e
Figure 14. Regulated power supply
4
5
6
7
0
10
20
30
40
I
S
V+ ( V )
8
Allowable operating
voltage range
94 7879 e
T
amb
= 25
°
C
Figure 15.
V
B
V
B
is a regulated output voltage with a nominal value of
2.9 V
0.4 V. It is derived from V
CC
and tracks it,
holding a value of approximately 54% of V
CC
. 1.5 mA
can be sourced from this supply at a typical output
impedance of 250
. The 47
μ
F capacitor indicated for
connection to the V
B
pin is required for stability reasons,
and must be adjacent to the IC. If the circuit is deselected
(see section on chip select), the V
B
voltage will go to 0 V.
Chip Select
The Chip Select pin (Pin 18) allows the chip to be pow-
ered down anytime its functions are not required. A logic
1 level in the range of 1.6 to 11 V deselects the chip, and
the resulting supply current (at V+) is shown in figure 12
The input resistance at Pin 18 is
the V
B
regulated voltages go to zero when the chip is
deselected. Leaving Pin 18 open is equivalent to a logic
O (chip enabled).
75 k
. The V
CC
and
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PDF描述 |
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| U4083 | Low-Power Audio Amplifier for Telephone Applications |
| U4083B | Low-Power Audio Amplifier for Telephone Applications |
| U4083B-AFP | Low-Power Audio Amplifier for Telephone Applications |
| U4083B-AFPG3 | Low-Power Audio Amplifier for Telephone Applications |
| U4084B-FL | LOW POWER QUAD VOLTAGE COMPARATOR |
相關代理商/技術參數 |
參數描述 |
|---|---|
| U4082B | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Low-voltage Voice-switched IC for Hands-free Operation |
| U4082B-DEV-BOARD | 功能描述:射頻開發工具 Voice Switched Circuit RoHS:否 制造商:Taiyo Yuden 產品:Wireless Modules 類型:Wireless Audio 工具用于評估:WYSAAVDX7 頻率: 工作電源電壓:3.4 V to 5.5 V |
| U4082B-MFLG | 功能描述:射頻無線雜項 COM.CORDED - VOICE SWITCHED CIRCUIT RoHS:否 制造商:Texas Instruments 工作頻率:112 kHz to 205 kHz 電源電壓-最大:3.6 V 電源電壓-最小:3 V 電源電流:8 mA 最大功率耗散: 工作溫度范圍:- 40 C to + 110 C 封裝 / 箱體:VQFN-48 封裝:Reel |
| U4082B-MFLG3G | 功能描述:射頻無線雜項 COM.CORDED - VOICE SWITCHED CIRCUIT RoHS:否 制造商:Texas Instruments 工作頻率:112 kHz to 205 kHz 電源電壓-最大:3.6 V 電源電壓-最小:3 V 電源電流:8 mA 最大功率耗散: 工作溫度范圍:- 40 C to + 110 C 封裝 / 箱體:VQFN-48 封裝:Reel |
| U4083 | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Low-Power Audio Amplifier for Telephone Applications |
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