- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄372195 > SP8034A 250 V/us APC Amplifier with Integrated Photodiode and Gain Adjust Capability PDF資料下載
參數(shù)資料
| 型號： | SP8034A |
| 英文描述： | 250 V/us APC Amplifier with Integrated Photodiode and Gain Adjust Capability |
| 中文描述： | 250伏/我們apc的集成光電二極管放大器和增益調(diào)整能力 |
| 文件頁數(shù)： | 3/6頁 |
| 文件大?。?/td> | 68K |
| 代理商： | SP8034A |
3
Rev. 5/14/03
SP8034A APC Amplifier with Integrated Photodetector
Copyright 2003 Sipex Corporation
PIN DESCRIPTION
PIN NUMBER
1
2
3
4
5
6
7
8
NAME
V
CC
GAIN
RG
COM
GND
R
GAIN1
R
GAIN2
V
REF
V
OUT
FUNCTION
Supply Voltage
GAIN Select
Common connection point for R
GAIN1
and R
GAIN2
Power Ground
Gain Adjust 1(Gain Select = LOW)
Gain Adjust 2 (Gain Select = HIGH)
Reference Voltage
Output Voltage
The SP8034A is an Automatic Power Control
(APC) circuit for pick-up head applications.
The part consists of a photo-detector that con-
verts the light (780nm or 650nm) into current,
and active circuitry (transimpedance amplifier
and buffer) to convert the current into voltage.
The overall transfer characteristics are therefore
represented by a Voltage per Watt curve.
There are three pins for gain adjust, using two
separate external resistors for two separate gain
modes. This allows different adjust for a DVD
and a CD mode.
The two resistors are each tied from the corre-
sponding RG pin (pin 5 or 6, depending on the
mode) to the common gain pin (pin 3).
The gain adjust is proportional to the external
resistance and is done by means of an analog
duplication circuit that translates the resistance
value in an active feedback circuit at the
transimpedance amplifier. The fact that the exter-
nal resistor is not in the signal path ensures a better
signal quality and immunity to the parasitic ca-
pacitance/inductance on the pins 3,5 and 6.
In dark condition, the output of the circuit will
remain at the externally supplied V
(1.9V
≥
2.3V). When light (650nm or 780nm) is re-
ceived on the photo-diode, the output (V
OUT
, pin
8) will swing negative with respect to V
. The
output swing is guaranteed to be at least 1.5V
from V
REF
. For example, with V
REF
at 2V, the
output can swing at least as low as 0.5V (abso-
lute).
Figure 2. Sensitivity vs. Gain Resistor (Absolute)
Gain (dB)
+6
0
-3
-6 *
* V
CC
≥
5.0V
Sensitivity (mV/mW)
4
2
1.4
1
Regain (
)
950
400
250
150
Ts(nS) 1%
13
12
11
10
BW (MHz)
61
79
87
93
Pin(uW)
380
750
1070
1500
Table 1. Target Gain Set Points for the System.
Figure 3. System Bandwith versus Gain Resistor,
V
CC
= 5V, T = 27C.
0.0
200
400
600
800
1.0K
100M
95.0M
90.0M
85.0M
80.0M
75.0M
70.0M
65.0M
60.0M
55.0M
50.0M
45.0M
R
GAIN
THEORY OF OPERATION
S
0
1000
1500
2000
2500
3000
3500
4000
4500
5000
0
100
200
300
400
500
600
700
800
900
1000
Gain Adjust Resistor (
)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SP8036 | APC Amplifier with Integrated Photodiode and Gain Adjust Capability |
| SP8036DG4 | APC Amplifier with Integrated Photodiode and Gain Adjust Capability |
| SP8042PB | 7 Channel Photo Detector IC |
| SP8042W | 7 Channel Photo Detector IC |
| SP8042 | 12 Channel, PDIC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SP8036 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:APC Amplifier with Integrated Photodiode and Gain Adjust Capability |
| SP8036DG4 | 制造商:SIPEX 制造商全稱:Sipex Corporation 功能描述:APC Amplifier with Integrated Photodiode and Gain Adjust Capability |
| SP8039DC4-C WAF | 制造商:Intel 功能描述: |
| SP-803-AR-SK | 功能描述:顯示開發(fā)工具 Starter kit of SP803 AR with I/O board RoHS:否 制造商:4D Systems 產(chǎn)品:4Display Shields 工具用于評估:?OLED-160-G1, ?OLED-160-G2 接口類型:Serial 工作電源電壓:5 V |
| SP-803-CABLE-KIT | 制造商:ADLINK Technology Inc 功能描述:CABLE KIT FOR SP-803 - Bulk |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。