Integrated Circuits
Data Sheet
ET9560-5
3 CHANNEL DIFFERENTIAL AMPLIFIER-COMPARATOR
(For 5V Applications)
FEATURES
- Supply Voltage Range 4.5V to 5.5V
- Operation to 1MHz
- Designed for photodiode inputs
- Built-in current sink for driving an LED (saves board space)
- Outputs short circuit protected
- 25mA peak drive current may eliminate the need for line driver devices in many applications
- Comparator hysteresis 1.1 : 1 (same as the “LH” designation in other ETIC devices)
- Small package or die for COB use
This part is available in a 24 lead TSSOP package, standard or Pb-Free, or as die.
| Package |
Suffix |
| 20 Lead SSOP |
-SS |
| Die |
-C |
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, (labeled PD in the block diagram), 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. Hysteresis ratio of comparators is 1.1:1.
This version has the same performance as the former ET9560LH device, but is screened for operation with typical logic supplies running at 5V.
APPLICATIONS
- High Speed Optical Encoders
- Industrial Control
- Differential optical comparators
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| Parameters |
Symbol |
Min. |
Typ. |
Max. |
Units |
Test Conditions |
Supply Current |
Icc1 |
4.5 |
7.2 |
11.5 |
mA |
Vcc = 4.5 V |
Input Common Mode Voltage |
VCM |
--- |
1.15 |
--- |
V |
--- |
Average Photocurrent Input |
IIA |
0.066 |
0.3 |
40 |
A |
Each input |
Peak Photocurrent Input |
IIP |
0.13 |
0.5 |
60 |
A |
Each input |
Dark Cell Level |
IID |
0.02 |
0.1 |
20 |
A |
Each input |
Photocurrent Contrast Ratio |
IIR |
2:1 |
5:1 |
--- |
--- |
Peak:Dark Cell |
Comparator Threshold |
|
--- |
1.1:1 |
--- |
--- |
Ratio of Differential Inputs |
Output High Level Voltage |
VOH |
2.5 |
3.0 |
--- |
V |
IOH = -4mA,VCC = 4.5V |
Output Low Level Voltage |
VOL |
--- |
199 |
400 |
mV |
VCC = 5.5V
IOL = 8mA |
Output Short-Circuit Current Driving High (All Outputs) |
IOS |
15 |
25 |
50 |
mA |
VCC = 5V, VOUT = 0V |
Output Short-Circuit Current Driving Low (All Outputs) |
IOS |
30 |
70 |
120 |
mA |
VCC = 5V, VOUT = 5V |
RSET Voltage |
VRSET |
1.3 |
1.7 |
2.1 |
V |
R = 180 ohms |
BLOCK DIAGRAM
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, typical values given at VCC=5V, TA = 25°C, with LED and RSET open.
ABSOLUTE MAXIMUM RATINGS
Parameter |
Symbol |
Min. |
Max. |
Units |
Ref. |
Operating Temperature Range |
TA |
-40 |
125 |
°C |
Not tested. |
Supply Voltage Range |
VCC |
4.5 |
5.5 |
V |
- |
AC SWITCHING CHARACTERISTICS
Values given at VCC = 5V, TA = 25°C, CL = 15pF on all outputs.
Parameters |
Symbol |
Min. |
Typ. |
Max. |
Units |
Test Conditions |
Pre-Amplifier Bandwidth |
BWPA |
- |
900 |
- |
KHz |
Photocurrent = 1.5µA Minimum |
Propagation delay from Comparator Input to Output |
TPD |
- |
850 |
- |
ns |
- |
Output Rise Time |
TR |
- |
105 |
- |
ns |
- |
Output Fall Time |
TF |
- |
25 |
- |
ns |
- |
Pin Descriptions
Pin # |
Pin Name |
Description/Use |
1 |
RSET |
Connect a resistor here to set the LED current to be supplied. See application note APP-D2 for details. If an LED is not used, leave this pin open. |
2,3,6,7,14,15 |
PD A+, PD A-, PD B+, PD B-, PD C+, PD C- |
Photodiode input pins. Connect PD anodes to these pins, and cathode(s) to VCC to provide reverse bias. |
4,10,13 |
AOUT, BOUT, COUT |
Digital signals with totem-pole outputs. |
5 |
GND |
Return for supply voltage. |
8,9,11 |
N/C |
No connection. Leave these pins open. |
12 |
VCC |
Supply voltage for device, 5V nominal. |
16 |
LED |
Connect external LED cathode to this pin. If an LED is not to be driven from the device, leave this pin open. |
ET9560-5-SOP-LF
Package Drawing for 16L SOIC
May be marked as 9560-5-LF.
ET9560-5-C
Size = .067” x .094” (1702µ x 2388µ)
Thickness = .011” - .013” (279µ - 330µ)
Pad coordinates are in microns.
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