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參數(shù)資料
| 型號(hào)： | UAA3515AHL |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 無(wú)繩電話/電話 |
| 英文描述： | 900 MHz analog cordless telephone IC |
| 中文描述： | TELECOM, CORDLESS, RF AND BASEBAND CIRCUIT, PQFP64 |
| 封裝： | 10 X 10 X 1.40 MM, PLASTIC, LQFP-64 |
| 文件頁(yè)數(shù)： | 23/44頁(yè) |
| 文件大?。?/td> | 180K |
| 代理商： | UAA3515AHL |
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2001 Dec 12
23
Philips Semiconductors
Product specification
900 MHz analog cordless telephone IC
UAA3515A
7.9.5
TX
AND
RX
GAIN CONTROL REGISTERS
The TX and RX audio signal paths each have a programmable gain block. If a TX or RX voltage gain other than the
nominal power-up default is desired it can be programmed through the microcontroller interface. The gain blocks can be
used during final telephone testing to adjust electronically gain tolerances in the telephone system. The RX gain and the
TX gain controls have steps of 0.5 dB covering a dynamic range of
7.5 to +8.0 dB. Measured on the earpiece amplifier
output, RX gain steps are multiplied by 2 due to the expander slope. A dynamic range of
15 to +16 dB at the earpiece
amplifier supports a volume control feature that can be implemented in the telephone and compensate for gain
tolerances. Volume control can also be performed externally with hardware switches on various resistor values.
Table 11
RX and TX gain control registers
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
GAIN CONTROL
RX GAIN (dB)
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
EARO (dB)
15.0
14.0
13.0
12.0
11.0
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
TX GAIN (dB)
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
8.0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2
3
4
5
6
7
8
9
10
11
12
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