- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄367804 > PCA1070T (NXP SEMICONDUCTORS) Multistandard programmable analog CMOS transmission IC PDF資料下載
參數(shù)資料
| 型號(hào)： | PCA1070T |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Multistandard programmable analog CMOS transmission IC |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PDSO24 |
| 文件頁數(shù)： | 9/36頁 |
| 文件大?。?/td> | 180K |
| 代理商： | PCA1070T |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁當(dāng)前第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁
1997 Jun 20
9
Philips Semiconductors
Product specification
Multistandard programmable analog
CMOS transmission IC
PCA1070
The total gain of the DTMF channel between the DTMF
input and the line LN is as follows:
G
DTMF
= G
ma
+ 6 (dB)
Default G
DTMF
= 15 + 6 = 21 dB
The confidence tone gain (DTMF to QR outputs) is:
With symmetrical drive of earpiece G
CTs
= G
ra
19 (dB)
Default G
CTss
=
6
19 =
25 dB.
At low gain settings (G
ra
<
10 dB), the confidence tone
gain will be slightly higher than the calculated value. This
is caused by a residual signal.
Programming the gain of the ‘sending prog-amp’ and the
‘rec prog-amp’ is given in Table 13.
Receiving channel
The gain of the receiving channel is defined between the
line connection LN and the earpiece outputs QR+ and
QR
. Its voltage gain is default
6 dB (differential drive).
The LN terminal accepts receiving signals up to 1 V (RMS)
for THD = 2%. The outputs may be used to connect
dynamic, magnetic or piezoelectric earpieces with
single-ended or differential drive. The load select bit RFC
is set default to logic 1 to guarantee stable operation in
case of a capacitive load (piezoelectric earpiece). With a
resistive load (dynamic capsule) RFC should be set to
logic 0 via the I
2
C-bus interface to obtain optimum
performance with respect to distortion and bandwidth.
Two levels for hearing protection can be selected via the
I
2
C-bus interface with control bit HPL.
The earpiece arrangements are illustrated in Fig.6.
Fig.6 Earpiece arrangements.
handbook, halfpage
MGE340
QR
+
QR
(a)
symmetrical
(b)
single-ended
QR
+
VSS
QR
The gain of the receiving channel can be programmed
between
19 dB and +11 dB (symmetrical drive) in 1 dB
steps using bit code GRAx (6 bits).
GRAx sets the gain of the ‘rec prog-amp’ (allowed range
G
ra
=
19 dB to +11 dB; default G
ra
=
6 dB).
The total gain of the receiving channel is as follows:
Symmetrical drive G
RS
= G
ra
(dB)
Default G
RS
=
6 dB.
Asymmetrical or single-ended drive G
RA
= G
RS
6 (dB)
Default G
ra
=
6
6 (dB) =
12 dB.
Programming the gain G
ra
of the ‘rec prog-amp’ is given in
Table 13.
Sidetone balance
The PCA1070 has an on-chip anti-sidetone circuit.
An internal balance impedance Z
oss
can be programmed
via the I
2
C-bus interface to match the external line
impedance Z
line
to give optimum sidetone suppression.
Z
oss
= R
sa
+ (R
sb
// C
s
).
Programming the sidetone balance impedance is given in
Tables 14, 15 and 16.
Line current control
The DC line current can be read via the I
2
C-bus interface.
This information can be used for the adaptation of
transmission parameters (for example line loss
compensation, sidetone balance and DC characteristic).
The bit code LCx as a function of line current is given in
Table 17.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PCA145LA | Optoelectronic |
| PCA145LCA | Optoelectronic |
| PCA145LG | Optoelectronic |
| PCA145LR | Optoelectronic |
| PCA145SR | Optoelectronic |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA-107-18-086 | 制造商:Power Dynamics Inc 功能描述:PCA Series Power Entry Module |
| PCA-1-08-HU-3-50 | 功能描述:FFC & FPC連接器 8P R/A UPPER CONTACTS RoHS:否 制造商:JAE Electronics 產(chǎn)品類型:Plugs 系列:HD 節(jié)距:0.5 mm 位置/觸點(diǎn)數(shù)量:40 安裝角: 安裝風(fēng)格:Cable 外殼材料:Plastic 觸點(diǎn)材料:Copper Alloy 觸點(diǎn)電鍍:Gold 電壓額定值:100 V per contact 電流額定值:0.24 A to 1 A |
| PCA-1-08-V-3-20 | 功能描述:FFC & FPC連接器 8P TOP ENTRY THRU HOLE RoHS:否 制造商:JAE Electronics 產(chǎn)品類型:Plugs 系列:HD 節(jié)距:0.5 mm 位置/觸點(diǎn)數(shù)量:40 安裝角: 安裝風(fēng)格:Cable 外殼材料:Plastic 觸點(diǎn)材料:Copper Alloy 觸點(diǎn)電鍍:Gold 電壓額定值:100 V per contact 電流額定值:0.24 A to 1 A |
| PCA11 0-9 | 制造商:Panduit Corp 功能描述:Clip-On Wire Markers, .11"-.13" Wire OD, Black/White 300 PC |
| PCA11/5ER-U01S002 | 功能描述:變壓器音頻和信號(hào) 193uH DCR .35ohms 12pin SMD 6 windings RoHS:否 制造商:Skyworks Solutions, Inc. 頻率范圍:810 MHz to 960 MHz 初級(jí)線圈阻抗: 次級(jí)線圈阻抗: 絕緣電壓:23 dB 工作溫度范圍:- 40 C to + 85 C 端接類型:SMD/SMT 尺寸:6 mm L x 4.9 mm W x 1.6 mm H 產(chǎn)品:Splitters and Combiners |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。