參數(shù)資料
型號(hào): PCA1070
廠商: NXP Semiconductors N.V.
英文描述: Multistandard programmable analog CMOS transmission IC
中文描述: 多標(biāo)準(zhǔn)傳輸可編程模擬CMOS集成電路
文件頁(yè)數(shù): 26/36頁(yè)
文件大?。?/td> 180K
代理商: PCA1070
1997 Jun 20
26
Philips Semiconductors
Product specification
Multistandard programmable analog
CMOS transmission IC
PCA1070
23. The internal balance impedance Z
oss
to match the external load impedance at pin LN (Z
line
= Z
oss
) for optimum
sidetone suppression; Z
oss
= R
sa
+ (R
sb
// C
s
); without clock the sidetone balance impedance is automatically set to
Z
oss
= 600
(typical).
24. Other values can be found in Tables 14, 15 and 16.
25. Value C
s
= 5 nF can also be programmed.
26. Gain sending channel G
M
= default (typical 41 dB); gain receiving channel G
rec
= default (typical
6 dB); sidetone
gain G
STS
minimum sidetone suppression at f = 300 Hz and 3400 Hz is: G
M
+ G
R
G
st(max)
= 41
6
15 = 20 dB.
G
STA
, the sidetone gain for asymmetrical drive equals G
STS
6 (in dB).
27. Indication only; exact values can be found in Table 16.
28. Standard I
2
C-bus specifications are valid for V
DD
2.5 V. Relaxed specifications for V
DD
= 1.8 to 2.5 V.
29. Recommended accuracy of input frequency; a higher tolerance will cause parameters to deviate from their specified
values; note that all parameters are specified with the reference input clock frequency f
clk
= 3.579545 MHz.
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