AC4790-200A-485 Laird Technologies, AC4790-200A-485 Datasheet - Page 48

• Manufacturer Part Number: AC4790-200A-485
• Description: TXRX 900MHZ 3.3-5.5V FHSS 200MW
• Manufacturer: Laird Technologies
• Series: AeroCommr

Specifications of AC4790-200A-485

• Frequency: 902MHz ~ 928MHz
• Data Rate - Maximum: 115.2kbps
• Modulation Or Protocol: FHSS, FSK
• Applications: AMR, Fire & Security Alarms, Telemetry
• Power - Output: 5mW ~ 200mW
• Sensitivity: -110dBm
• Voltage - Supply: 3.3V, 5V
• Current - Transmitting: 68mA
• Data Interface: Connector, 2 x 10 Header
• Antenna Connector: On-Board, Chip
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Wireless Frequency: 900 MHz
• Interface Type: 20-pin mini connector
• Board Size: 49 mm x 42 mm x 5 mm
• Modulation: FHSS, FSK
• Security: 1 byte System ID, DES
• Operating Voltage: 3.3 V to 5.5 V
• Output Power: 200 mW
• Antenna: Integral and External Dipole
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Memory Size: -
• Current - Receiving: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

A
Below is a simple switching power supply that provides enough current to easily power any Laird Technology OEM
module. It utilizes low cost, off the shelf components that fit into a small area. This supply has an input voltage range
of +6 volts to +18 volts and will output +3.4 volts at 1.5 amps.
Included is a schematic, bill of materials with manufacture's name and part numbers and a sample PCB layout. It is
important to follow the layout suggestions and use large areas of copper to connect the devices as shown in the
layout. It is also important to hook up the ground traces as shown and use multiple vias to connect input and output
capacitors to the bottom side ground plane.
If the input voltage will be less than 12 volts then C1 and C2 can be replaced with a single 100uF 20 volt capacitor
(same part number as C7). This will reduce board space and lower costs further. If you are powering an AC5124
module, R1 can be changed to a 373 ohm 1% resistor. This will change the output to +5 volts at 1.0 amps.
B I L L O F M A T E R I A L S
PPENDIX
Qty
1
1
2
3
1
1
1
1
1
1
Reference
C3 C4 C5
I - S
C1 C2
C6
C7
D1
D2
U1
R1
R2
L1
T a b l e 1 5 : P o w e r S u p p l y B i l l o f M a t e r i a l s
AMPLE
CS51413
3300pF
Value
B230/A
LL4148
100uF
0.1uF
47uF
15uH
210
127
Cap, Cer, 0603, 3300pF, X7R, 50V
IC, CS51413, 8P, SO, Switch Reg
Diode, SMB, B230/A, 2A, Schott-
Cap, Cer, 0603, 0.1uF, Y5V, 25V
www.lairdtech.com\wireless
Diode, MELF, LL4148, Switch
P
Cap, Tant, 7343, 100uF, 20V
Cap, Tant, 7343, 47uF, 35V
Res, 0603, 210, 1/16W, 1%
Res, 0603, 127, 1/16W, 1%
Xfmr, 2P, SMT, 15uH, 2A
OWER
Description
Diode
Ctrl.
key
S
UPPLY
Diodes, Inc.
Diodes, Inc.
Coiltronics
On-Semi-
Murata
Murata
Kemet
cond.
Mfg.
KOA
KOA
AVX
GRM39X7R332K050AD
GRM39Y5V104Z025AD
Mfg. part number
TPSE476M035R0200
T491X107K020A5
RK73H1JT2100F
RK73H1JT1270F
UP2.8B150
CS51413
B230/A
LL4148
I