HBCC-0500 Datasheet, PDF (3/4 Pages) Agilent(Hewlett-Packard) – Low Current Bar Code Digitizer IC

Recommended Schematic
Shown is the recommended
schematic for the HBCC-0500.
Here are some construction tips.
1. Place the sensor, 2N4403, bin
resistor, and the 0.47 µF cap
close to each other to minimize
loop area.
2. If the 0.47 µF cap is tantalum,
its ESR must be used in series
with R_b to determine the
correct value for R_b.
3. A 1.0 µF ceramic cap may be
used in place of the 0.47 µF
cap.
4. Place the 0.22 µF cap attached
to pins 4 and 23 close to the
IC.
5. Use a single point ground close
to pin 23.
Options
There are four options on the
recommended schematic.
1. Output pull up resistor
2. Inverted output
3. Black state return
4. Threshold adjust
Pull Up Resistor
The 10 kΩ pull up resistor on the
standard or inverted output
transistor is optional. If the
transistor is driving a cable, the
resistor should be on the far end
of the cable.
Schematic
Rb Ω
2N4403
LED ANODE ⁶
LED CATHODE ²
DETECTOR
CATHODE
1
DETECTOR ⁸
ANODE
SENSOR
+5 V
39 Ω
39 Ω
0.47
0.22
µF
µF
24 _LEDD
4 _VCC
0.22
µF
23 _GND
CMPO ¹⁹
CMPI ¹⁷
LPFO ²²
AMDT ¹³
56 KΩ
2.0 MΩ
20 KΩ
680 pF
56 KΩ
8.2 nF
680 KΩ
15 _PSTI
7 _PREO HBCC-
LPFI ²¹
6 _EMIN ⁰⁵⁰⁰ _CMPA 14
2N5088
5 _AGND
ACMP ¹²
IWSR ²⁰
470 KΩ _{1 RPER}
V_CCA ⁸
9.1 KΩ _{2 RPWD}
PRBP ¹⁰
75 pF _{3 CTIM}
0.1 µF _{9 PPKD}
PSTB ¹¹
CTHR ^{NPKD 16}
+5 V
6.8 MΩ
470 KΩ
18 _{390 KΩ}
1 nF
1 nF
2.2 nF 330 pF
12 pF
NC
0.22 µF
0.1 µF
0.1 µF
0.1 µF
1.3 MΩ
1N4148
20 KΩ
+5 V
10 KΩ (OPTIONAL)
OUTPUT
2N3904
+5 V
10 KΩ
(OPTIONAL)
INVERTED
OUTPUT
INVERTED OUTPUT
(OPTIONAL)
+5 V
3.3 nF
1.0 MΩ
220 KΩ
2N5088
1.0 pF
2.0 MΩ
1N4148
BLACK STATE RETURN
(OPTIONAL)
4-35