Data Sheet
AS22 Series
Miniature Kit Encoder
Description
The Broadcom
®
AS22 Series kit encoder solution offers a
compact size with an overall diameter of 22 mm and height
of 10.9 mm for the space-constrained application.
To meet the growing demand for high-precision application,
the AS22 Series offers a wide range of incremental
resolution, ranging from 360 to 2048 counts per revolution
(cpr).
The encoder provides A and B channel of incremental digital
signal output, as well as a digital index pulse per revolution
enabling the homing positioning operation. The
three-channel solution comes with the optional RS422
compatible differential output offering the high transmission
noise immunity for signal over cable.
To cater to a wide selection of industrial applications, this
encoder is design to operate in a robust environment with
the operating temperature ranging from –20°C to +100°C.
The AS22 Series is designed for ease of use. The kit
solution is engineered with the hassle-free installation,
eliminating the need for a tedious alignment process.
Features
Compact size Ø22 × 10.9 mm
5V operating voltage
–20°C to +100°C operating temperature
Incremental A, B, and Index channels
TTL and RS422 compatible differential output
360 cpr to 2048 cpr
Shaft diameter from 2 mm up to ¼"
Spatial play tolerance of Ø0.15 mm
Allows motor shaft axial play of ±0.25 mm
Hassles-free installation
Rohs compliance
Applications
Industrial automation and robotic
Industrial sewing and textiles machinery
Stepper/servo motor
Factory automation
NOTE:
This product is not specifically designed or
manufactured for use in any specific device.
Customers are solely responsible for determining
the suitability of this product for its intended
application and solely liable for all loss, damage,
expense, or liability in connection with such use.
Broadcom
AS22-Kit-Encoder-DS102
January 29, 2018
AS22 Series
Data Sheet
Miniature Kit Encoder
Package Dimensions
Mounting Considerations
All dimensions are in mm.
NOTE:
1. No maximum shaft length limit for cover with hole option.
Pin Configuration
Pin
1
2
3
4
5
6
7
a
8
a
Differential
GND
Ch A+
Ch A–
Vcc
Ch B+
Ch B-
Ch I+
Ch I–
Single Ended (TTL)
GND
Ch A+
NA
Vcc
Ch B+
NA
Ch I+
NA
a. Only applicable to 3 channel options.
NOTE:
Mating connector is JST Socket 08SR-3S, wire
AWG #30 or JST SHR-08V-S-B/SHR-08V-S with
contact SSH-003T-P0.2-H for wire AWG#32~28 .
Broadcom
AS22-Kit-Encoder-DS102
2
AS22 Series
Data Sheet
Miniature Kit Encoder
Absolute Maximum Ratings
Parameter
Storage Temperature, T
S
Operating Temperature, T
A
Supply Voltage, V
CC
Output Voltage, V
O
Output Current per Channel, I
OUT
(single ended)
Output Current per Channel, I
OUT
(differential line drivers)
Vibration (JEDEC JESD22-B103)
Mechanical Shock (JEDEC JESD22-B110)
Relative Humidity
ESD, IEC 61000-4-2, Air discharge (TTL and differential)
–40°C to +100°C
–20°C to +100°C
–0.5V to +7V
–0.5V to VCC
±1.5 mA
±20 mA
20G, 20 Hz to 2000 Hz
1500G (peak), 0.5-ms pulse duration, half sine
60°C, 90%RH
±15 kV
Output Waveform
P
Amplitude
A
B
S1
S2
S3
S4
Viewing
direction
I
Index
I
Index
Index of 180 e° option
Index of 90 e° option
Ch A leads Ch B for clockwise direction, viewed from cover side of the encoder
Broadcom
AS22-Kit-Encoder-DS102
3
AS22 Series
Data Sheet
Miniature Kit Encoder
Recommended Operating Conditions
Parameter
Ambient Temperature
Supply Voltage
Max RPM
Sym.
T
A
V
CC
Min.
–20
4.5
—
Typ.
—
5.0
—
Max.
+100
5.5
4800k/cpr
9600k/cpr
19200k/cpr
Unit
°C
V
Ripple < 100 mVp-p
360 cpr to 512 cpr
1000 cpr and 1024 cpr
2000 cpr and 2048 cpr
Notes
Encoding Characteristics
Encoding characteristics over recommended operating range and recommended mounting tolerances unless otherwise
specified.
Parameter
Pulse Width Error
Sym.
ΔP
Min.
—
—
—
Logic State Width Error
ΔS
—
—
—
Index Width Error
ΔI
—
—
Typ.
10
15
20
5
10
15
5
5
Max.
20
25
45
15
25
40
40
15
Unit
e
e
e
e
e
e
e
e
Notes
360 cpr to 512 cpr
1000 cpr and 1024 cpr
2000 cpr and 2048 cpr
360 cpr to 512 cpr
1000 cpr and 1024 cpr
2000 cpr and 2048 cpr
180e
index
90e
index
Single-Ended Electrical Characteristics
Electrical characteristics over recommended operating condition at 25°C.
Parameter
Supply Current
High Level Output Voltage
Low Level Output Voltage
Output Current per Channel
Rise Time
Fall Time
Rise Time
Fall Time
Sym.
Icc
V
OH
V
OL
Io
t
r
t
f
t
r
t
f
Min.
—
2.4
—
—
—
—
—
—
Typ.
23
—
—
—
<100
<100
<65
<90
Max.
35
—
0.4
1.5
—
—
—
—
Unit
mA
V
V
mA
ns
ns
ns
ns
C
L
= 25 pF
R
L
= 2.7 kΩ
No load
No load
I
OH
= –1.5mA
I
OL
= +1.5mA
Notes
Broadcom
AS22-Kit-Encoder-DS102
4
AS22 Series
Data Sheet
Miniature Kit Encoder
Differential Electrical Characteristics
Electrical characteristics over recommended operating condition at 25°C.
Parameter
Supply Current
High Level Output Voltage
Low Level Output Voltage
Output Current per Channel
Rise Time
Fall Time
Rise Time
Fall Time
Sym.
I
CC
V
OH
V
OL
I
O
t
r
t
f
t
r
t
f
Min.
—
2.4
—
—
—
—
—
—
Typ.
35
—
—
—
<220
<150
<35
<25
Max.
60
—
0.4
20
—
—
—
—
Unit
mA
V
V
mA
ns
ns
ns
ns
C
L
= 14 pF
R
L
= 2.7 kΩ
No load
No load
I
OH
= –20 mA
I
OL
= +20 mA
Notes
Mechanical Characteristics
Parameter
Code Wheel Shaft Diameter
Max Shaft Length
a
Min Shaft Length
Shaft Axial Play
Radial Play Including Shaft TIR
Max Moment of Inertia for Code
Wheel Assembly
Hub Set Screw Torque
Mounting Screw Torque (2x M2.5)
a. No limit for hole in cover option.
Remark
Dimension
2, 3, 4, 5, 6
1/8, 5/32, 3/16, 1/4
Tolerance
g6
—
—
±0.25 (±0.01)
Ø0.15(0.006)
—
—
—
Unit
mm
in.
mm
mm
mm (in.)
mm (in.)
g.mm
2
N.m
N.m
Including shaft axial play
End of shaft chamfer
10(0.395)
8.0(0.315)
—
—
81.5
0.10 to 0.13
0.10 to 0.23
Broadcom
AS22-Kit-Encoder-DS102
5
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