S1T8515A01-U0B0 [SAMSUNG]
FM IF RECEIVER FOR FLEX PAGER; FM IF接收器， FLEX寻呼机
| 型号： | S1T8515A01-U0B0 |
| 厂家： | 
SAMSUNG |
| 描述： | FM IF RECEIVER FOR FLEX PAGER |
| 文件： | 总6页 (文件大小：89K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FM IF RECEIVER FOR FLEX PAGER
INTRODUCTION
S1T8515A
24- SSOP- BD209
The S1T8515A is a designed for FM detection on the FLEX pager set.
It consists of an Oscillator, Mixer, Limiting IF Amp. Quadrature
Detector, Regulator, RSSI (Received Signal Strength Indicator), Bit
Rate Filter, and a 2-level / 4-level FSK comparator.
It has a 24-SSOP (0.65mm)Surface Mount Package.
FEATURES
•
•
•
•
•
•
•
Internal A/D converter for 4 level FSK (2-bit ADC)
High transmission rate: 6400bps (Max.)
Operating voltage range: V
= 1.1 ~ 4.0V
CC1
Typical supply current: 1.5mA at 1.4V
Low battery detection circuit (alarm function): 1.05V
Mixer operating frequency: 10 ~ 50MHz
Package type: 24-SSOP (0.65mm)
ORDERING INFORMATION
Device
Package
24- SSOP- BD209
Operating Temperature
- 20°C ~ +70°C
S1T8515A01-U0B0
1
S1T8515A
FM IF RECEIVER FOR FLEX PAGER
BLOCK DIAGRAM
MI
24
GND
23
REGO REGC
22 21
AO FSKO1 FSKO2 BSC
20 19 18 17
QC1
16
QC2 FSKR2 RSSI
15 14 13
2nd
MIX
FSK
Comparator
Quick
Charge
1.0V Regulator Alarm
Limiting IF
Amplifier
Quad
Detector
X-tal
Osc.
Bit-rate Filter
1
2
3
4
5
6
7
8
9
10
11
12
OSCI OSCO MO
Vcc
LI
LD
FSKR1 QD
C1
C2
C3 FIL VAR
PIN CONFIGURATION
OSCI
1
2
3
4
5
6
7
8
9
24 MI
OSCO
MO
23 GND
22 REGO
21 REGC
20 AO
Vcc
LI
S1T8515A
LD
19 FSKO1
FSKR1
QD
18 FSKO2
17 BSC
C1
16 QC1
C2 10
15 QC2
C3 11
14 FSKR2
13 RSSI
FIL VAR 12
2
FM IF RECEIVER FOR FLEX PAGER
PIN DESCRIPTION
S1T8515A
Pin No
Symbol
OSCI
Description
Oscillator input (Base). The oscillator is an internally biased colpitts type.
Oscillator output (Emitter).
1
2
3
OSCO
MO
Mixer output (Output impedance » 1.5kW) Connect a 455kHz filter between this pin
and the LI.
4
5
6
7
8
9
V
Power supply voltage.
CC
LI
IF limiter amplifier input (Input impedance » 1.5kW).
Bypass capacitor connect pin for the IF limiter amp.
Differential Amp Reference input on the FSK comparator.
Quadrature detection, phase shiftier input.
LD
FSKR1
QD
C1
C2
C3
10
11
Capacitors for bit-rate filter.
12
FIL VAR
Bit-rate filter selection.
High: Internal cut-off frequency will be set to Low.
Low: Internal cut- off frequency will be set to High.
13
RSSI
RSSI output.
The power of received RF signal can be detected by monitoring the limiter amplifier.
14
FSKR2
Differential Amp Reference input on the FSK comparator for 4-Level FSK Detection.
15, 16
QC2, QC1
Quick charge control 2 & 1.
High: Quick charge-discharge on. Low: Quick charge-discharge off.
17
18
BSC
Battery saving control.
High: Battery saving off-normal mode operation.
Low: Battery saving on-battery save mode operation.
FSKO2
The output signal from the Bit-rate filter is compared with FSK Reference signal, and
the final output signal will be output to the LSB after 4-Level FSK detection.
19
20
FSKO1
AO
The final output signal will be output to the MSB after 4-Level FSK detection.
Alarm output.
This pin becomes high, when V drops below 1.05V.
CC
21
REGC
S1T8515A has an internal PNP transistor.
But, it also can support an external PNP transistor to control the power.
22
23
24
REGO
GND
MI
Regulated voltage output.
Ground.
Mixer input (Input impedance » 1.5kW).
3
S1T8515A
FM IF RECEIVER FOR FLEX PAGER
ABSOLUTE MAXIMUM RATINGS
Characteristic
Supply Voltage
Symbol
Value
4
Unit
V
V
P
T
T
CC (MAX)
Power Dissipation
760
mW
°C
D
Operating Temperature
Storage Temperature
- 20 — +70
- 55 — +125
OPR
STG
°C
ELECTRICAL CHARACTERISTICS
(V = 1.4V ±5%, f (2MIX) = 21.4MHz, f
= ±4.8kHz, f
= 800Hz, Ta = 25°C, FIL_VAR = “H”, unless
MOD
CC
IN
DEV
otherwise specified)
Characteristic
Symbol
Test Conditions
No Input Signal
Min.
Typ.
1.5
0
Max.
1.75
10
1.1
0.4
2
Unit
mA
mA
Operating current
I
I
-
-
CCN
CCS
Battery Saving
Alarm detection voltage
V
V
-
1.0
-
1.05
-
V
AD
Alarm low level output voltage
I = 100mA
V
O (AL)
Alarm high level leakage current I
-
-
-
mA
LKG (AL)
L (FSK)
LKG (FSK)
FSK low level output voltage
FSK high level leakage current
Regulator output voltage
Quick charge current
V
I = 100mA
-
-
0.4
2
V
I
-
-
-
mA
V
-
0.95
50
-
1.0
70
2.5
54
12
55
2.0
- 10
5
1.05
-
V
OREG
I
-
mA
C
Input for - 3dB sensitivity
Recovered audio output voltage
Mixer conversion gain
V
V
Mixer Input
7.5
78
16
-
mVrms
mVrms
dB
LIM
V
= 500mVrms
IN (2MIX)
36
8
O (RAO)
DG
Ceramic Filter loss = - 1dB
V (M)
Signal to noise ratio
S/N
V
V
= 500mVrms
38
-
dB
IN (MIX1N)
IN (MIX1N)
Total Harmonic Distortion
Mixer 3rd order intercept point
Mixer input resistance
THD
3RD
= 500mVrms
3.5
-
%
-
-
-
-
dBm
kW
kW
dB
R
R
3.5
0.9
25
6.5
2.1
-
I (MIX)
I (LA)
Limiting amp input resistance
AM rejection ratio
1.5
40
AMR
V
= 500mVrms
IN (2MIX)
(AM = 300%)
Data shaping output duty
RSSI output voltage
DR
V
V
= 500mVrms
= 1mVrms
-
40
0.49
90
50
0.7
100
60
%
V
IN (2MIX)
IN (2MIX)
V
0.91
110
RSSI
RSSI output resistance
R
kW
RSSI
4
FM IF RECEIVER FOR FLEX PAGER
TEST CIRCUIT
S1T8515A
Alarm out FSKO1
FSKO2
RF Input
Reg. out
Vcc
QC1
QC2
FSKR2
+
RSSI
2.2m
+
100K
100K
100K
51
0.1m
10m
1000p
GND
L H
L
FSKO1 FSKO2
20 19 18
FSKR2
15 14
MI
REGO REGC
22
AO
BSC
QC1
QC2
RSSI
24
23
21
17
16
13
2nd
MIX
FSK
Comparator
Quick
Charge
1.0V Regulator Alarm
Limiting IF
Amplifier
Quad
Detector
X-tal
Osc.
Bit-rate Filter
1
2
3
4
5
6
7
8
9
10
C2
11
C3
12
OSCI OSCO
MO
Vcc
LI
LD FSKR1
QD
C1
FIL VAR
L
+
1000p
1500p
H
1200p
56p
39p
10m
0.1m
CDBM
455
20.945MHz
3.3K
+
10u
CFMW455E
5
S1T8515A
FM IF RECEIVER FOR FLEX PAGER
NOTES
6
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