Data Sheet

HT9831
315/433MHz ASK Transmitter
Features
· Complete UHF ASK transmitter
· Low voltage operation - down to 2.0V
· Frequency range 300MHz to 450MHz
· Data tracking function for device wake-up
· Data rates higher than 10kbps
· Reference clock output
· Output Power up to 10dBm
· 8-pin SOP/TSSOP packages
Applications
· Car alarm Remote control
· Multi-Media Remote Control
· Wireless PIR
· Remote Sensor Data Links
· Remote Power Switches
· Infrared Transmitter Replacement
General Description
HT9831 minimum ASK data rate is 10kbps which supports a more complicated control protocol.
The HT9831 is a highly integrated ASK transmitter IC for
remote wireless applications in the 300 to 450MHz frequency band. This transmitter IC is a true ²data-in, antenna-out² monolithic device making it very easy for
users to implement a wireless system. It is only necessary to supply a crystal generated reference frequency,
which is the RF carrier frequency divided by 32, and a
few additional external parts to create a complete and
versatile transmitter. The HT9831 is capable of delivering +9.5dBm into a 50W load. This power level is possible due to a small form factor transmitter (lossy antenna)
which can operate near the maximum transmission regulation limit. The HT9831 utilises ASK/OOK - Amplitude
Shift Keying/On-Off Keying- UHF receiver types from
wide-band super-regenerative radios to narrow-band,
high performance super-heterodyne receivers. The
To minimise power consumption, the HT9831 provides
a data tracking function. In the Idle Mode, the internal
PLL will be switched off, but when high to low data is received the PLL will be switched on and data will be
transmitted without delay. The PLL will be turned off automatically and the HT9831 will return to the Idle Mode
after no data input transients have been received for
more than 300ms. As there is a reference clock output
for the MCU, the MCU can use its internal RC clock
rather than using an additional crystal for precise timing.
With these combined features the HT9831 can provide
a power-saving and cost effective solution for a huge
range of remote wireless applications.
Block Diagram
E N
D IN
X O U T
X IN
C R E F
Rev. 1.10
X T A L
E n a b le
C o n tro l
3 2 X P L L
P A
P A _ O U T
D iv id e r
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September 23, 2010
HT9831
Pin Assignment
X O U T
1
8
X IN
D IN
2
7
V S S
C R E F
3
6
P A O U T
E N
4
5
V D D
H T 9 8 3 1
8 S O P -A /T S S O P -A
Pin Description
Pin No.
Pin Name
External Components
For 433.92MHz add18pF capacitor
For 315MHz add 15pF capacitor
Description
1
XOUT
Crystal Fs output
2
DIN
3
CREF
Output clock (Fs/65536) to MCU I/O
433.92MHz:Typ 207Hz
315MHz: Typ 150Hz
4
EN
Pull high resistor
High: RF always on
Low: DIN high trigger RF on
5
VDD
10mF decoupling capacitor
Power supply
6
PA_OUT
L/C matched circuit
Power amplifier output
7
VSS
8
XIN
ASK data input
Ground
For 433.92MHz add 18pF capacitor
For 315MHz add 15pF capacitor
Crystal Fs input
Absolute Maximum Ratings
Operating Supply Voltage ....................................................................................................................VDD=2.0V~3.6V
Voltage on I/O Pins .......................................................................................................................VSS-0.3 to VDD+0.3V
Storage Temperature Range ..............................................................................................................-50°C to + 125°C
Lead Temperature (soldering, 10 seconds)........................................................................................................+ 300°C
ESD Rating ..............................................................................................................................................................3kV
Ambient Operating Temperature (TA) ....................................................................................................-40°C to +85°C
Programmable Transmitter Frequency Ran.....................................................................................300MHz to 450MHz
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed
in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability.
Rev. 1.10
2
September 23, 2010
HT9831
Electrical Characteristics
Ta = 25°C, Freq REFOSC=13.560MHz, EN=VDD. Bold values indicate -40°C to +85°C unless otherwise noted. 1kbps
data rate 50% duty cycle. RL 50W load (matched)
Test Conditions
Symbol
Parameter
Min.
Typ.
Max.
Unit
@315MHz, POUT=+10dBm
¾
13.5
¾
mA
@433.92MHz
¾
13.5
¾
mA
@315MHz
¾
3.0
¾
mA
@433.92 MHz
¾
3.0
¾
mA
@315MHz
¾
1.0
¾
mA
@433.92 MHz
¾
1.0
¾
mA
@315MHz *
¾
9.5
¾
dBm
@433.92MHz *
¾
9.5
¾
dBm
@630MHz, 2nd harm
¾
-48
¾
dBc
@945MHz, 3rd harm
¾
-60
¾
dBc
@867.84MHz, 2nd harm
¾
-45
¾
dBc
@1301.76MHz, 3rd harm
¾
-55
¾
dBc
VDD
IH
Data High Current
IL
Data Low Current
ISTB
EN Low & DIN Low Current
Conditions
3V
3V
3V
RF and Crystal
Output power level
Harmonics output for 315 MHz
Harmonics output for 433.92MHz
3V
3V
Extinction ratio for ASK 10Kbps
3V
¾
¾
-70
¾
dBc
Data Rate
3V
¾
10
¾
¾
kbps
@315MHz
¾
kHz
3V
¾
<900
Occupied Bandwidth
@433.92MHz
¾
<1000
¾
kHz
100kHz from Carrier
¾
-78
¾
dBc/Hz
1000kHz from Carrier
¾
-77
¾
dBc/Hz
100kHz from Carrier
¾
-78
¾
dBc/Hz
1000kHz from Carrier
¾
-76
¾
dBc/Hz
315MHz Single Side Band Phase
Noise
3V
433.92MHz Single Side Band
Phase Noise
3V
XTLIN, XTLOUT
3V
Pin capacitance
¾
2
¾
pF
¾
¾
pF
3V
See application circuit C3,C4
@315MHz
15
External Capacitance
@433.92MHz
¾
18
¾
pF
3V
Standby transition from low
to high **
¾
500
¾
ms
ASK to RF Out Response Time
3V
Delta between ASK input
transition from Low To High
to RF output transition from
low to high
¾
1
¾
ms
@315MHz
¾
Hz
3V
¾
150
CREF clock output frequency
@433.92MHz
¾
207
¾
Hz
Output Blanking
Note:
3.3V
* Depend on PC board layout
** Generally limited by crystal
Rev. 1.10
3
September 23, 2010
HT9831
Timing Diagram
EN
>300ms~500ms
500us
300ms~500ms
300ms~500ms
10Kbps
DIN
500us
315MHz/433MHz
PLL
PAOUT
150Hz/207Hz
CREF
Note:
CREF output clock frequency is much lower than PLL output frequency. The figure shown above is just for
presentation.
State table:
Note:
EN
DIN
PAOUT
CREF
0
0
0
0
0
1
300~450MHz
143~215Hz
1
0
0
143~215Hz
1
1
300~450MHz
143~215Hz
PAOUT output frequency is fOSC´32 and CREF output clock frequency is fOSC/216. For example:
PAOUT output frequency is 13.56MHz´32=433.92MHz and CREF output clock frequency is
13.56MHz/216 » 207Hz.
Rev. 1.10
4
September 23, 2010
HT9831
Application Circuits - 315MHz (433MHz) TX
Test Circuits
Low Cost Application Circuit
Trace ANT or l /4 wire
Reference clock to MUC, etc.
Rev. 1.10
5
September 23, 2010
HT9831
Package Information
8-pin SOP (150mil) Outline Dimensions
5
8
A
B
4
1
C
C '
G
H
D
E
=
F
MS-012
Symbol
A
Rev. 1.10
Dimensions in mm
Min.
Nom.
Max.
5.79
¾
6.20
B
3.81
¾
3.99
C
0.30
¾
0.51
C¢
4.78
¾
5.00
D
¾
¾
1.75
E
¾
1.27
¾
F
0.10
¾
0.25
G
0.41
¾
1.27
H
0.18
¾
0.25
a
0°
¾
8°
6
September 23, 2010
HT9831
8-pin TSSOP Outline Dimensions
8
5
E 1
1
4
E
D
A
L
A 2
e
R
0 .1 0
A 1
B
C
L 1
y
G
(4 C O R N E R S )
Symbol
Rev. 1.10
Dimensions in mm
Min.
Nom.
Max.
A
1.05
¾
1.20
A1
0.05
¾
0.15
A2
0.80
¾
1.05
B
¾
0.25
¾
C
0.11
¾
0.15
D
2.90
¾
3.10
E
6.20
¾
6.60
E1
4.30
¾
4.50
e
¾
0.65
¾
L
0.50
¾
0.70
L1
0.90
¾
1.10
y
¾
¾
0.10
q
0°
¾
8°
7
September 23, 2010
HT9831
Product Tape and Reel Specifications
Reel Dimensions
D
T 2
A
C
B
T 1
SOP 8N
Symbol
Description
Dimensions in mm
A
Reel Outer Diameter
330.0±1.0
B
Reel Inner Diameter
100.0±1.5
C
Spindle Hole Diameter
D
Key Slit Width
T1
Space Between Flange
T2
Reel Thickness
13.0
+0.5/-0.2
2.0±0.5
12.8
+0.3/-0.2
18.2±0.2
TSSOP 8L
Symbol
Description
Dimensions in mm
A
Reel Outer Diameter
330.0±1.0
B
Reel Inner Diameter
100.0±1.5
C
Spindle Hole Diameter
D
Key Slit Width
T1
Space Between Flange
T2
Reel Thickness
Rev. 1.10
13.0
+0.5/-0.2
2.0±0.5
12.8
+0.3/-0.2
18.2±0.2
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September 23, 2010
HT9831
Carrier Tape Dimensions
P 0
D
P 1
t
E
F
W
C
D 1
P
B 0
K 0
A 0
R e e l H o le
IC
p a c k a g e p in 1 a n d th e r e e l h o le s
a r e lo c a te d o n th e s a m e s id e .
SOP 8N
Symbol
Description
Dimensions in mm
12.0
+0.3/-0.1
W
Carrier Tape Width
P
Cavity Pitch
8.0±0.1
E
Perforation Position
1.75±0.1
F
Cavity to Perforation (Width Direction)
5.5±0.1
D
Perforation Diameter
D1
Cavity Hole Diameter
P0
Perforation Pitch
4.0±0.1
P1
Cavity to Perforation (Length Direction)
2.0±0.1
A0
Cavity Length
6.4±0.1
B0
Cavity Width
5.2±0.1
K0
Cavity Depth
1.55±0.1
1.50
+0.25/-0.00
2.1±0.1
t
Carrier Tape Thickness
C
Cover Tape Width
0.30±0.05
9.3±0.1
TSSOP 8L
Symbol
Description
Dimensions in mm
12.0
+0.3/-0.1
W
Carrier Tape Width
P
Cavity Pitch
E
Perforation Position
F
Cavity to Perforation (Width Direction)
D
Perforation Diameter
1.5
+0.1/-0.0
D1
Cavity Hole Diameter
1.5
+0.1/-0.0
P0
Perforation Pitch
4.0±0.1
P1
Cavity to Perforation (Length Direction)
2.0±0.1
A0
Cavity Length
7.0±0.1
B0
Cavity Width
3.6±0.1
K0
Cavity Depth
t
Carrier Tape Thickness
C
Cover Tape Width
Rev. 1.10
8.0±0.1
1.75±0.10
5.5±0.5
1.6±0.1
0.300±0.013
9.3±0.1
9
September 23, 2010
HT9831
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http://www.holtek.com.tw
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Tel: 1-510-252-9880
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http://www.holtek.com
Copyright Ó 2010 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used
solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable
without further modification, nor recommends the use of its products for application that may present a risk to human life
due to malfunction or otherwise. Holtek¢s products are not authorized for use as critical components in life support devices
or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information,
please visit our web site at http://www.holtek.com.tw.
Rev. 1.10
10
September 23, 2010