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參數(shù)資料
| 型號(hào)： | TZA1026 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Data amplifier and laser supply circuit for CD audio and video optical systems ((ADALASAuto)(應(yīng)用在CD音頻和視頻光學(xué)系統(tǒng)中的數(shù)據(jù)放大器和激光電源電路) |
| 中文描述： | 數(shù)據(jù)放大器和激光CD音頻和視頻（（ADALASAuto）（應(yīng)用在CD光學(xué)系統(tǒng)的供電線路音頻和視頻光學(xué)系統(tǒng)中的數(shù)據(jù)放大器和激光電源電路） |
| 文件頁數(shù)： | 2/20頁 |
| 文件大?。?/td> | 134K |
| 代理商： | TZA1026 |
1998 Oct 30
10
Philips Semiconductors
Product specication
Data amplier and laser supply circuit for CD
audio and video optical systems (ADALASAuto)
TZA1026
Notes
1. At
40 °C the value of VCMFB should be not become lower than 0.85 V.
2. Closed-loop output impedance (10 k
between pins RFEQO and RFFB).
3. GRF =(GRFEQO at fEQ) (GRFEQO at f = 1 kHz) where:
a) fEQ = 720 kHz for n = 1 times speed (see Fig.5)
b) fEQ = 1440 kHz for n = 2 times speed (see Fig.6)
c) fEQ = not applicable for n = 4 times speed (see Fig.7).
4. The appropriate external filter (n = 1, 2 or 4) should be used (see Table 1).
5. Values to be used in equation (1).
6. Vdrop =VDD(L) Vo(LASER).
7. An external resistor can be used to reduce the maximum output current (and the gain) of the laser supply;
see equation (4).
8. The output impedance strongly depends on the drop voltage (Vdrop). The output impedance will approximately double
when the drop voltage doubles.
9.
10. When a voltage dip at VDD(L) occurs it could cause peak currents on Io(LASER) coming out of the ALPC output.
To protect the laser against such peak currents a protection circuit will switch-off the laser current when Vdrop
becomes lower than Vclamp. When Vdrop >Vclamp the laser will switch-on automatically again.
11. The pin EQSEL is a three level switch. When this pin is left open-circuit two internal resistors will keep the pin EQSEL
at 1
2VDD. This is the n = 4 times speed state. The two internal resistors are non-linear (when EQSEL = HIGH or LOW
the input or output current will be limited).
VIH
HIGH-level input
voltage
pin CDRW
2
3VDD
VDD + 0.2
V
pin PWRON
2
3VDD
VDD + 0.2
V
pin EQSEL
note 11
V
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
RS
ref
V
mon
V
mon
-----------------
V
DD
V
DD
---------------
------------------
=
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