ETC ET9560-C

3 CHANNEL DIFFERENTIAL
AMPLIFIER-COMPARATOR
ET9560
(For 2 data channels and ungated index channel)
FEATURES
•
Supply Voltage Range 4.5V to 30V
•
Operation to 1MHz
•
Designed for photodiode inputs
•
Ungated Index channel
•
Current sink for LED drive (see application note
APP-D2)
•
Outputs short circuit protected
•
25mA peak drive current
APPLICATIONS
•
High Speed Optical Encoders
•
Industrial Controls
DESCRIPTION
These devices are specifically designed as receiver circuits for the photodiode signals available in optical encoders.
Connect the anode of the photodiodes to the input pins, with the cathode(s) connected to Vcc for reverse-bias
operation. The input amplifiers have a dynamic range of nearly 1000:1, and allow contrast ratios of encoded signal to
common mode signal of as low as 2:1. Differential inputs enhance noise rejection and performance over temperature.
Gating of the Z channel provides synchronization of the reference pulse to the data channel phasing.
ABSOLUTE MAXIMUM RATINGS
Parameter
Operating Temperature
Range
Supply Voltage Range
Symbol
TA
VCC
Min.
-40
Max.
125
Units
°C
4.5
30
V
Ref.
Note 1
ETIC RESERVES THE RIGHT TO MAKE CHANGES AT ANY TIME TO IMPROVE THE DESIGN AND TO SUPPLY THE BEST PRODUCT.
©2000, Rev B0
iC-Haus GmbH
Tel +49-6135-9292-0
Integrated Circuits
Fax +49-6135-9292-192
Am Kuemmerling 18, D-55294 Bodenheim
http://www.ichaus.com
Page 1 of 3
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, typical values given at VCC=12V, TA = 25°C, with LED and RSET open.
Parameters
Supply Current
Input Common Mode Voltage
Average Photocurrent Input
Peak Photocurrent Input
Dark Cell Level
Photocurrent Contrast Ratio
Comparator Threshold
Symbol
Icc1
Icc2
VCM
IIA
IIP
IID
IIR
Min.
4.5
5.0
0.066
0.13
0.02
2:1
Typ.
7.2
8.0
1.35
0.3
0.5
0.1
5:1
1.25:
1
3.0
28.5
199
Max.
11.5
12.5
Units
mA
40
60
20
V
µA
µA
µA
400
mV
Test Conditions
Vcc = 4.5 V
Vcc = 30.0V
Output High Level Voltage
VOH
Output Low Level Voltage
VOL
Output Short-Circuit Current
Driving High (All Outputs)
Output Short-Circuit Current
Driving Low (All Outputs)
RSET Voltage
IOS
15
25
50
mA
Each input
Each input
Each input
Peak:Dark Cell
Ratio of Differential
Inputs
IOH = -4mA,VCC = 4.5V
IOH = -4mA,VCC = 30V
VCC = 4.5V-30V
IOL = 8mA
VCC = 5V, VOUT = 0V
IOS
30
70
120
mA
VCC = 5V, VOUT = 5V
VRSET
1.3
1.7
2.1
V
R = 180 ohms
2.5
28.0
V
AC SWITCHING CHARACTERISTICS
Values given at VCC = 5V, TA = 25°C, CL = 15pF on all outputs.
Parameters
Symbol
Min.
Typ.
Max
.
Units
Pre-Amplifier Bandwidth
BW PA
900
KHz
Propagation delay from Comparator
Input to Output
Output Rise Time
Output Fall Time
TPD
850
ns
TR
TF
100
20
ns
ns
Test Conditions
Photocurrent = 1µA
Minimum
ETIC RESERVES THE RIGHT TO MAKE CHANGES AT ANY TIME TO IMPROVE THE DESIGN AND TO SUPPLY THE BEST PRODUCT.
©2000, Rev B0
iC-Haus GmbH
Tel +49-6135-9292-0
Integrated Circuits
Fax +49-6135-9292-192
Am Kuemmerling 18, D-55294 Bodenheim
http://www.ichaus.com
Page 2 of 3
NOTES:
1. This is not a test parameter, but for information
only.
PACKAGE
SUFFIX
Chip Only
16 Lead SOIC
-C
-SOP
ETIC RESERVES THE RIGHT TO MAKE CHANGES AT ANY TIME TO IMPROVE THE DESIGN AND TO SUPPLY THE BEST PRODUCT.
©2000, Rev B0
iC-Haus GmbH
Tel +49-6135-9292-0
Integrated Circuits
Fax +49-6135-9292-192
Am Kuemmerling 18, D-55294 Bodenheim
http://www.ichaus.com
Page 3 of 3