TK14588
FM IF IC
FEATURES
s
s
s
s
s
s
Input Frequency (~22 MHz)
Low Voltage Operation (2.3 to 5.5 V)
Battery Save Function
Wide Band Demodulator (~1 MHz)
High Speed Data Comparator (~2 Mbps)
Very Small Package (TSSOP-16)
APPLICATIONS
s
Communications Equipment
s
Wireless LAN
s
Keyless Entry Systems
TK14588V
IF INPUT
GND
RSSI
IF OUTPUT
DET INPUT
DET OUTPUT
AMP OUTPUT
COMP INPUT
COMP INPUT
DESCRIPTION
The TK14588V is a standard function general purpose IF
IC capable of operating up to 22 MHz. The TK14588V
contains a high-speed data comparator for base band
processing. The TK14588V has a unique function that
allows establishing the demodulation characteristics by
changing the external RC time constant, and not changing
the phase shifter constant. The RSSI output is individually
trimmed, resulting in excellent accuracy, good linearity,
and stable temperature characteristics. The TK14588V
was developed for high-speed data communication, DECT,
wireless LAN, keyless entry systems, etc.
The TK14588V is available in the very small TSSOP-16
surface mount package.
RSSI
GND
DECOUPLE
DECOUPLE
NC
POWER SAVE
VCC
COMP OUTPUT
COMP GND
BLOCK DIAGRAM
AMP OUTPUT
DET OUTPUT
GND
AMP
COMP INPUT
+
COMP
ORDERING INFORMATION
POWER SAVE
DECOUPLE
DECOUPLE
NC
VCC
COMP OUTPUT
COMP GND
IF INPUT
VCC
TK14588V
Tape/Reel Code
TAPE/REEL CODE
TL: Tape Left
January 2000 TOKO, Inc.
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Page 1
COMP INPUT
DET INPUT
IF OUTPUT
+
-
TK14588
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ........................................................... 6 V
Operating Voltage Range .............................. 2.3 to 5.5 V
Power Dissipation (Note 1) ................................ 160 mW
Storage Temperature Range ................... -55 to +150
°C
Operating Temperature Range ...................-30 to +85
°C
Operating Frequency Range (IF) ................. 6 to 22 MHz
Operating Frequecy Range (Demodulation) ..... to 1 MHz
TK14588V ELECTRICAL CHARACTERISTICS
Test conditions: V
CC
= 3 V, f
IN
= 10.7 MHz, fm = 1 kHz, Modulation =
±50
kHz, T
A
= 25
°C,
unless otherwise specified.
SYMBOL
I
CC
IF
V
OUT
THD
S/N
SINAD
R
IF(IN)
G
RSSI
No input
-60 dBm non-modulated input
V
RSSI
RSSI Output Voltage
-30 dBm non-modulated input
0 dBm non-modulated input
COMPARATOR
D
R
I
OUT
Duty Ratio
Output Current
45
50
1
55
%
mA
1.05
1.50
1.20
1.70
1.40
1.95
V
V
0.00
0.40
0.20
0.55
0.30
0.70
V
V
Output Voltage
Total Harmonic Distortion
Signal to Noise Ratio
12 dB SINAD
Limiter Input Resistance
Gain
1.4
69
-30 dBm input
-30 dBm input
-30 dBm input
60
120
200
0.5
70
-89
1.8
75
-83
2.2
360
2.0
mVrms
%
dB
dBm
kΩ
dB
PARAMETER
Supply Current
Power Save = ON, No input
0.2
5.0
µA
TEST CONDITIONS
No input
MIN
TYP
3.5
MAX
5.0
UNITS
mA
Note 1: Power dissipation is 160 mW when mounted as recommended. Derate at 1.28 mW/°C for operation above 25°C.
Page 2
January 2000 TOKO, Inc.
TK14588
TEST CIRCUIT
VCC
RSSI OUT
3.3 kΩ
0.01 µF
12 kΩ
836BH-0268 (TOKO)
DET OUTPUT
1000 pF
10 kΩ
10 kΩ
0.01 µF
COMP INPUT
1 pF
GND
51 kΩ
+
COMP
VCC
VCC
0.01 µF
P.S.
50
Ω
+
0.01 µF
4.7 µF
COMP
VCC
~
0.01 µF
IF-INPUT
0.01 µF
3 kΩ
COMP
OUT
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25
°C,
unless otherwise specified.
S+N, N, AM OUT, TOTAL
HARMONIC DISTORTION vs.
INPUT VOLTAGE
S+N
RSSI OUTPUT VOLTAGE vs.
INPUT VOLTAGE
20
16
THD (%)
12
8
VRSSI (V)
0
S+N,N, AM OUT (dBV)
-20
-40
-60
-80
2.0
1.6
1.2
0.8
0.4
0.0
-120 -100 -80
-
AM OUT
(30% mod.)
THD
N
4
0
-60 -40 -20
VIN (dBm)
0
20
-100
-120 -100 -80
January 2000 TOKO, Inc.
+
-
AMP
VCC
5.5 V
3.0 V
2.3 V
-60 -40 -20
VIN (dBm)
0
20
Page 3
TK14588
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25
°C,
unless otherwise specified.
DETUNE CHARACTERISTICS
-10
-20
20
16
VOUT(DC) (V)
S CURVE
3
VOUT
VOUT (mVrms)
-40
-50
-60
10.3
8
4
0
11.1
THD (%)
-30
12
2
1
THD
10.5
10.7
fIN (MHz)
10.9
0
10.3
10.5
10.7
fIN (MHz)
10.9
11.1
SUPPLY CURRENT, OUTPUT VOLTAGE,
TOTAL HARMONIC DISTORTION vs.
SUPPLY VOLTAGE
5
300
260
VOUT (dBV)
ICC
SIGNAL TO NOISE RATIO,
-3 dB LIMITING SENSITIVITY,
12 dB SINAD vs. SUPPLY VOLTAGE
-50
80
70
S/N
THD (dB), ICC (mA)
4
3
-60
-70
S/N (dB)
220
VOUT
60
-3 dB LIMITING SENSITIVITY
180
140
THD
2
1
0
2
3
4
VCC (V)
5
6
50
40
30
2
3
4
VCC (V)
5
-80
-90
-100
6
12 dB SINAD
100
SUPPLY VOLTAGE, OUTPUT VOLTAGE,
TOTAL HARMONIC DISTORTION
vs. TEMPERATURE
5
300
260
VOUT (mVrms)
ICC
SIGNAL TO NOISE RATIO,
-3 dB LIMITING SENSITIVITY,
12 dB SINAD vs. TEMPERATURE
80
70
S/N (dB)
S/N
-50
-60
-70
-3 dB LIMITING SENSITIVITY
4
3
VOUT
220
180
140
THD
60
50
12 dB SINAD
2
1
0
100
-80
-90
-100
100
40
30
-40
100
-40
-20
0
20
40
60
80
-20
0
20
40
60
80
TA (°C)
TA (°C)
Page 4
January 2000 TOKO, Inc.
-3 dB LIMITING SENSITIVITY,
12 dB SINAD (dBm)
THD (%), ICC (mA)
-3 dB LIMITING SENSITIVITY,
12 dB SINAD (dBm)
TK14588
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
T
A
= 25
°C,
unless otherwise specified.
LIMITER GAIN vs.
INPUT FREQUENCY
100
80
GAIN (dB)
VRSSI (V)
60
40
20
0
1
3
5
10
30
50
fIN (MHz)
RSSI OUTPUT VOLTAGE vs.
TEMPERATURE
2.0
1.8
1.6
1.4
1.2
1.0
-40
VIN = -30 dBm
VIN = 0 dBm
VIN = -15 dBm
-20
0
20
40
60
80
100
TA (°C)
Data Comparator Output Voltage Transient Response
(Rise)
(Fall)
OUT
(1V/div)
OUT
(1V/div)
IN
(10 mV/div)
IN
(10 mV/div)
50 ns/div
50 ns/div
RSSI OUTPUT VOLTAGE vs.
TEMPERATURE
1.0
VIN = -45 dBm
RSSI OUTPUT VOLTAGE vs.
INPUT VOLTAGE
2.0
1.6
VRSSI (V)
0.8
VRSSI (V)
0.6
0.4
1.2
0.8
0.4
TEMP (deg)
-30
0
25
50
70
85
VIN = -60 dBm
VIN = -75 dBm
0.2
0.0
-40
VIN = -90 dBm
-20
0
20
40
60
80
100
0.0
-120 -100 -80 -60 -40
VIN (dBm)
-20
0
20
TA (°C)
January 2000 TOKO, Inc.
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