PANASONIC AN6454SH

AN6454SH
Pager Direct Conversion FSK Demodulator Mixer IC
■ Overview
Unit : mm
1
10
5
6
0.5±0.2
0.15 +0.1
–0.05
0.625±0.10
1.5±0.2
0.1±0.1
0.625±0.10
0.5
• Low current consumption : 1mA
• Incorporates two mixers. 450MHz input frequency.
• Small surface-mount package with 0.5mm pitch.
3.0±0.3
■ Features
0.2±0.1
The AN6454SH supports direct conversion FSK demodulation for pagers, and incorporates two mixers.
4.3±0.3
6.3±0.3
SOP package with 10 pins (SSOP010-P-0225)
■ Pin Descriptions
Pin No.
Description
Pin No.
Description
1
MIX bias
6
MIX (2) output
2
L–OSC input (1)
7
MIX (1) output
3
L–OSC input (2)
8
GND
4
MIX current control
9
RF bias
5
VCC
10
RF input
■ Functional Block Diagram
MIX bias
1
MIX1
10
RF input
9
RF bias
8
GND
L-OSC input (1)
2
L-OSC input (2)
3
MIX Current
Control
VCC
4
7
MIX (1) output
5
6
MIX (2) output
BIAS
MIX2
■ Absolute Maximum Ratings (Ta=25˚C)
Symbol
Rating
Supply voltage
Parameter
VCC
4
Unit
V
Supply current
ICC
20
mA
Power dissipation
PD
143.5 (Ta=75˚C)
mW
Operating ambient temperature
Topr
–20 to + 70
˚C
Storage temperature
Tstg
–55 to +125
˚C
Note) Protect pins 3, 9, and 10 from electrostatic discharge.
■ Recommented Operating Range
Parameter
Operating supply voltage range
Symbol
Range
VCC
1.8 to 3V
■ Electrical Characteristics (VCC=2.0V, Ta=25±2˚C)
Parameter
Symbol
Current consumption
Itot
MIX output level (1)
VMIX1
MIX output level (2)
VMIX1
Condition
min
typ
max
Unit
0.6
1.0
1.4
mA
Input Level –54dBm, f=450.0045MHz
–38
–34
–30
dBs
Input Level –54dBm, f=450.0045MHz
–38
–34
–30
dBs
■ Electrical Characteristics (Design Values for Reference) (VCC=2.0V, Ta=25±2˚C)
The following are design values for reference only (not guaranteed)
Parameter
RF bias voltage
Symbol
MIX bias current
VMIX
MIX output level difference
DVmix
Output noise level
Condition
min
VRF
Vn3
typ
max
0.745
V
1.3
DVmix=Vmix1–Vmix2
Vn3=
(Vn2)2 + (Vn2)2
2
–3.2
Unit
V
3.2
dB
25
dBs
■ Pin Descriptions
Pin No.
1
Symbol
MIX bias
Description
Equivalent circuit
Local oscillator bias. Normally
grounded though a capacitor.
VCC
2
3
12kΩ
1
2
L-OSC input 1
3
L-OSC input 2
Local oscillator inputs to Pin2 w and 3
are different in phase by π/2.
These inputs are different in frequency
by FM Dev from Pin 10 input.
4
4
MIX-current
control
Current input to this pin controls the
IC's operation and total current. This pin
may be connected to Pin 22 of AN6400.
2.4kΩ
5
VCC
2.4kΩ
This is the supply voltage pin.
VCC
6
MIX2 output
100Ω
6
Direct-conversion mixer outputs (FM
Dev.).
These outputs are different in phase by
π/2 from each other. These pins may be
to AN6400 or other direct conversion
demodulator ICs for data retrieval.
VCC
7
MIX1 output
100Ω
7
■ Pin Descriptions (Cont.)
Pin No.
Symbol
8
GND
9
RF bias
Description
Equivalent circuit
This is the ground pin.
This is the bias pin for RF input to Pin
10. The bias us internally provided. This
pin must be ground through a capacitor.
10
9
VCC
1.2kΩ
10
RF input
FSK-modulated RF signals from an RF
amplifier are input to this pin. RF
signals with up to 450MHz are
acceptable.
1.2kΩ