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參數資料
| 型號： | TDA4884 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | Advanced monitor video controller for OSD |
| 中文描述： | 3 CHANNEL, VIDEO PREAMPLIFIER, PDIP20 |
| 封裝： | 0.300 INCH, PLASTIC, SOT-146-1, DIP-20 |
| 文件頁數： | 12/28頁 |
| 文件大?。?/td> | 189K |
| 代理商： | TDA4884 |
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1997 Nov 26
12
Philips Semiconductors
Product specification
Three gain control video pre-amplifier for OSD
TDA4884
13. The output current approximately follows the equation
for V
o
> V
bl(SO)
and with
R
O
= external resistor at voltage output to ground.
The external RC combination at pins 19, 16 and 13 (see Fig.1) enables peak currents during transients.
14. Frequency response, crosstalk and pulse response have been measured at voltage outputs in a special
printed-circuit board with 50
line in/out connections and without peaking (see Chapter “Application and test
information”). Typical frequency response see Fig.9, typical pulse response see Fig.11 and typical characteristic of
contrast control as a function of frequency see Fig.12.
15. Crosstalk between any two output pins (e.g. channels 1 and 2):
a)
Input conditions
: one channel (channel 1) with nominal input signal and minimum rise time. The inputs of the
other channels capacitively coupled to ground (channels 2 and 3). Gain pins 3, 1 and 11 open-circuit.
b)
Output conditions
: output signal of channel 1 is set by contrast control voltage (pin 6) to
V
o(b-w)
= V
o(VOUT1)
= 0.7 V, the rise time should be 5 ns. Output signal of channel 2 then is V
o(b-w)
= V
o(VOUT2)
.
c)
Transient crosstalk
:
d) Crosstalk as a function of frequency has been measured without peaking circuit, with nominal input signal and
nominal settings. Typical frequency dependent crosstalk between channels see Figs 13, 14 and 15.
16. The internal threshold voltages are derived from a stabilized voltage. The internal pulses are generated while the
input pulses are higher than the thresholds. Voltages less than
0.1 V at pins 9 and 10 can influence black-level
control and should be avoided.
17. For 75 ns/V < t
r(CL)
, t
f(CL)
< 240 ns/V, generation of internal input clamping and blanking pulse is not defined.
Pulses not exceeding the threshold of input clamping (typical 3 V) will be detected as blanking pulse. Timing of pulses
at pin 10 see Fig.16.
I
o
V
o
R
O
-1
2.2 k
------1
+
500
μ
A
–
=
α
cr tr
20
log
V
o(VOUT1)
V
×
=
相關PDF資料 |
PDF描述 |
|---|---|
| TDA4885 | 150 MHz video controller with I2C-bus |
| TDA4886A | 140 MHz video controller with I2C-bus |
| TDA4886 | 140 MHz video controller with I2C-bus |
| TDA4887 | 160 MHz bus-controlled monitor video preamplifier |
| TDA4887PS | 160 MHz bus-controlled monitor video preamplifier |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TDA4885 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| TDA4885/V2 | 制造商:NXP Semiconductors 功能描述: |
| TDA4886 | 制造商:PHILIPS-SEMI 功能描述: |
| TDA4886A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:140 MHz video controller with I2C-bus |
| TDA4887 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:160 MHz bus-controlled monitor video preamplifier |
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