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參數資料
| 型號： | AD9660KR-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 其它接口 |
| 英文描述： | 200 MHz Laser Diode Driver with Light Power Control |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, PDSO28 |
| 封裝： | PLASTIC, SOIC-28 |
| 文件頁數： | 5/12頁 |
| 文件大?。?/td> | 256K |
| 代理商： | AD9660KR-REEL |
REV. 0
–5–
Typical Performance Characteristics–AD9660
2ns
20mV
6.25mV
–193.8mV
50
50
–120V
ANTEL
ARS1
ML64116R
OUTPUT
TEK 11802
O'SCOPE
AD9660
PHOTO DETECTOR
Figure 1. Driving ML64116R Laser @ 30 mW
R
OFFSET
– k
I
O
35
30
00
25
5
10
15
20
25
10
5
15
20
Figure 2. I
OFFSET
vs. R
OFFSET
DELAY
VOLT
REF
OUTPUT
LASER
DIODE
PHOTO
DETECTOR
WRITE LOOP
WRITE HOLD
WRITE PULSE
WRITE CAL
R
GAIN
BIAS LEVEL
BIAS CAL
BIAS HOLD
OFFSET PULSE
ANALOG
50
V
REF
V
REF
5pF
ANALOG
TTL
TTL
TTL
V
REF
OUT
4.0V
1:10
V:1
TZA
2* I
MONITOR
1.85:1
I
MODULATION
C
GAIN
POWER
MONITOR
DISABLE
DISABLE
CIRCUIT
WRITE LEVEL
GAIN
I
OUT
I
MONITOR
SENSE IN
+V
S
V:1
ANALOG
1:10
V
REF
TTL
1:10
I
BIAS
I
OFFSET
1.4V
OFFSET CURRENT
SET
BIAS LOOP
AD9660
*
10ns DELAY ON RISING
EDGE; 0ns ON FALLING
TTL
5pF
Figure 3. Functional Block Diagram
THEORY OF OPERATION
The AD9660 combines a very fast output current switch with
onboard analog light power control loops to provide the user
with a complete laser diode driver solution. The block diagram
illustrates the key internal functions. The control loops of the
AD9660, the bias loop and the write loop, adjust the output
current level, I
OUT
, so that the photo diode feedback current,
I
MONITOR
, out of SENSE IN is proportional to the analog input
voltage at BIAS LEVEL or WRITE LEVEL. Since the monitor
current is proportional to the laser diode light power, the loops
effectively control laser power to a level proportional to the ana-
log inputs. The control loops should be periodically calibrated
independently (see Choosing C
BIAS HOLD
and C
WRITE HOLD
).
The offset current generator produces an open loop output cur-
rent, I
OFFSET
. Its level is controlled by an external set resistor or
a current out DAC (see Figure 2). While I
OFFSET
is not cali-
brated as the currents from the bias and write loops are, it can
be very versatile (see Offset Current below).
相關PDF資料 |
PDF描述 |
|---|---|
| AD9660 | 200 MHz Laser Diode Driver with Light Power Control |
| AD9660KR | 200 MHz Laser Diode Driver with Light Power Control |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| AD9661A | 制造商:AD 制造商全稱:Analog Devices 功能描述:Laser Diode Driver with Light Power Control |
| AD9661AKR | 制造商:Rochester Electronics LLC 功能描述:DUAL POWER LDD - Bulk 制造商:Analog Devices 功能描述: |
| AD9661AKR-REEL | 制造商:AD 制造商全稱:Analog Devices 功能描述:Laser Diode Driver with Light Power Control |
| AD9662 | 制造商:Analog Devices 功能描述:- Bulk |
| AD9662ARQZ | 制造商:Analog Devices 功能描述:LASER DRVR 3-CH 16QSOP - Rail/Tube |
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