TOKO TK14551VTL Datasheet

TK14551V

FM IF DETECTOR/AMPLIFIER

FEATURES

■ IF Input Frequency ~90 MHz (TYP)

■ Balanced Input (IF)

■ Includes Dual High Speed RSSI Outputs. One is for

ASK demodulation, another one is for carrier
sensing.

■ RSSI outputs are accurate with stable temperature
characteristic and include buffer amplifiers.

■ High Speed RSSI Comparator for Carrier Sensing

■ HIgh Speed Data Comparator (~2 Mbps)

■ Wide Band Demodulator (~1 MHz)

■ Battery Save Function

■ Low Voltage Operation: 3.0 ~ 5.5 V

■ Very Small Package (TSSOP-24)

DESCRIPTION

The TK14551V is a wide band IF IC capable of operating
up to 90 MHz. It includes an FM demodulator, RSSI, RSSI
comparator and data comparator. These functions can
perform high-speed operations. The TK14551V 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. Because the TK14551V includes a dual
high-speed RSSI output, it is possible to demodulate AM
simply and to sense the carrier level at the same time.

APPLICATIONS

■ Wide Band FSK Demodulation

■ Wide Band FM Demodulation

■ Video Signal Demodulation

■ Wide Band ASK Demodulation

TK14551

IF DECOUPLE

IF DECOUPLE

FM DEMODULATOR INPUT

FM DEMODULATOR AMP INPUT

FM DEMODULATOR AMP OUTPUT

RSSI BUFFERED OUTPUT-2

BLOCK DIAGRAM

IF OUTPUT

IF V

GND
V

DATA COMP INPUT (-)

DATA COMP INPUT (+)

CC

CC

IF INPUT (-)

IF INPUT (+)

23

IF GND

22
21

BATTERY SAVE

RSSI COMP BIAS

20

RSSI OUTPUT-1

19

RSSI OUTPUT-2

18

RSSI BUFFERED OUTPUT-1

17

RSSI COMP OUTPUT

16

RSSI COMP GND

15

DATA COMP GND

14

DATA COMP OUTPUT

13

IF INPUT (-)

IF INPUT (+)

IF GND

BATTERY SAVE

RSSI COMP BIAS

RSSI OUTPUT-1

RSSI OUTPUT-2

RSSI BUFFERED OUTPUT-1

RSSI COMP OUTPUT

RSSI COMP GND

DATA COMP GND

Therefore, the TK14551V is suitable for high-speed data
communication and can be used for various applications.

The TK14551V is available in the very small TSSOP-24
surface mount package.

ORDERING INFORMATION

TK14551V

Tape/Reel Code

TAPE/REEL CODE

TL: Tape Left

IF

AMP

IF DECOUPLE

IF DECOUPLE

BIAS

RSSI

Demodulator

V

CCVCC

CC
IF V

IF OUTPUT

FM DEMODULATOR INPUT

CC

GND

V

FM DEMODULATOR AMP INPUT

RSSI

Comparator

BUFF2

FM DEMODULATOR AMP OUTPUT

DATA COMP OUTPUT

Data

Comparator

DATA COMP INPUT (-)

DATA COMP INPUT (+)

RSSI BUFFERED OUTPUT-2

January 2000 TOKO, Inc. Page 1

TK14551V

ABSOLUTE MAXIMUM RATINGS

Supply Voltage ........................................................... 6 V

Operating Voltage Range.............................. 3.0 to 5.5 V

Power Dissipation (Note 1) ................................ 230 mW

TK14551V ELECTRICAL CHARACTERISTICS

Test conditions: V

= 3 V, T

CC

= 25 °C, unless otherwise specified.

A

Storage Temperature Range ................... -55 to +150 °C

Operating Temperature Range ...................-40 to +85 °C

Operating Frequency Range............ 0.1 to 90 MHz (typ.)

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Note 2: Refer to Test Circuit.

Page 2 January 2000 TOKO, Inc.

TK14551V ELECTRICAL CHARACTERISTICS

Test conditions: V

= 3 V, T

CC

= 25 °C, unless otherwise specified.

A

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January 2000 TOKO, Inc. Page 3

TK14551V

TK14551V ELECTRICAL CHARACTERISTICS

Test conditions: V

= 3 V, T

CC

= 25 °C, unless otherwise specified.

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Page 4 January 2000 TOKO, Inc.

C

TEST CIRCUIT

TK14551V

PG1

100 kHz 100 mV

DC = 1.0 V TR, TF < 10 ns

SG1

50

P-P

~

SG1

FM: 10.7 MHz

1 KHz ± 100 K dev

AM: 40.0 MHz

2 MHz 80% mod

2200 pF

FM IF Coil

T1: 836BH-0268

(TOKO)

2200 pF

51

V1 = 0.2 V

V2 = 2.0 V

0.01 µF

PG1

2200 pF

2200 pF

V3 = 0.9 V

SW1

1pF

2.2 K

50

T1

10 µF

V

CC

V4 = 1 V

SW3

SW2

5.6 K

100 pF

0.01 µF 0.01 µF

47 µF

5.6 K

A1

0.01 µF

V

CC = 3 V

V5 = 1 V

SW4

CL1
10 pF

VC

22 K

1000 pF

VA

V11 = 0.5 V

SW7

10 k

Comp V

C

CL2

1 k

1 k

SW5

SW10

SW9

SW8

A4

VB

V8

= 1 V

0.01 µF

10 pF

VD

A2

V6 = 3V

3 K

V9

V7 = 3V

NOTE:
CL1 and CL2 simulate probe capacitance
and stray capacitance.

VD and VE are measured with low capacitance
FET probe (Sony Tektronix P6201).

1000 pF

3 K

V10 = 0.9 V

10 µF

SW6

A3

VE

SG2

2 MHz 200mVP-P

Sine Wave
DC = 1.0 V

50

SG2

~

= 3 V

Example of 40 MHz (= fIN) FM detection

56 k

1 pF

2.2 k

1000 pF

22 pF

A638AN-1346ETJ

V

CC

(TOKO)

January 2000 TOKO, Inc. Page 5

TK14551V

TEST CIRCUIT (CONT.)

Measurement of Battery Save Function:

Battery Save ON: SW1 = 0.2 V position
Battery Save OFF: SW1 = 2 V position

Measurement of Comparator:

SW3 is closed only for the measurement of the RSSI comparator response characteristics and output sink
current, supplying 1 VDC to Pin 19.
PG1 is connected only for the measurement of the RSSI comparator response. Input the pulse wave to Pin 20,
and measure the output wave (VD) of Pin 16.
I

(RSSI Comparator Output Current):

SINK1

I

(Data Comparator Output Current):

SINK2

Measurement of TR, TF, tPD (RSSI Comparator, Data Comparator):

No IF input. SW2 = V3 position (supplying 0.9 V to Pin 20). SW3 = ON (supplying 1 V to Pin

19). SW5 = V6 position (supplying 3 V to Pin16). Measure the DC current to Pin 16 from
V6.

SW9 = V9 position(supplying 1 V Pin 11). SW10 = V10 position (supplying 0.9 V to Pin 12).
SW6 = V7 position (supplying 3 V to Pin 13). Measure the DC current to Pin 13 from V7.

RSSI Comparator: No IF input. SW2 = PG1 position. SW3 = ON (supplying 1 V to Pin 19). SW5 = VD position.
Measure the output wave (VD).

Data Comparator: SW9 = 3 kΩ position. SW10 = 3 kΩ position. SW6 = VE position. Measure the output wave
(VE).
TR, TF: Measure the time between the 10% point and the 90% point of the output wave.
tPD: Measure the time between the 50% point of the input wave and the 50% point of the output wave.

Measurement of the Logarithmic Detection of RSSI Output:

SW7 = OFF. SW8 = VB position. Input AM modulation signal SG1(fIN = 40 MHz, fm = 2 MHz, mod. = 80%, V
= -60, -40, -15 dBm) to Pin 24. Measure the logarithmic detection output voltage of Pin 10.
The AM demodulating output voltage deflection is standardizing the AM demodulating output voltage in the case
of -40 dBm input, and calculated by the deflection by AM demodulating output voltage in the case of -60, -15
dBm input.
The measurement of demodulating frequency band is standardizing the AM demodulating output voltage of Pin
10 in the case that VIN = -40 dBm, fIN = 40 MHz, fm = 100 kHz and 80% AM modulating output voltage at Pin 10,
comparing it to the standard output voltage.

Measurement of Output Current of RSSI Buffer Amplifier 2:

SW7 = OFF. SW8 = V8 position. No IF input. SW4 = ON (supplying 1 V to Pin 18). Measure the DC current
(A4) between V8 and Pin 10 in the case of V8 = 3 V, 0 V.

Measurement of Output Impedance of RSSI Buffer Amplifier 2:

No IF input. SW8 = VB position. SW4 = ON (supplying 1 V to Pin 18). At first, SW7 = OFF and measure the
DC current (VB1) of Pin 10. Next, SW7 = ON and measure the DC current (VB8) of Pin 10. The output impedance
(Z

) is calculated by the following:

OUT

IN

Z

(Ω) = 10 k • ((VB1 - VB2)/(VB2 - 0.5))

OUT

Page 6 January 2000 TOKO, Inc.

PIN FUNCTION DESCRIPTION

TK14551V

NIP

.ON

1

2

32
42

LOBMYS

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ELPUOCEDFI

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50 k 50 k

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January 2000 TOKO, Inc. Page 7

TK14551V

PIN FUNCTION DESCRIPTION (CONT.)

NIP

.ON

8

9

01DEREFFUBISSR

LOBMYS

MF

ROTALUDOMED

LANIMRET

EGATLOV

V4.1

IF V

CC

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1.4 V

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CC

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PMOCATAD

)-(TUPNI

IF V

CC

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CC

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Page 8 January 2000 TOKO, Inc.

PIN FUNCTION DESCRIPTION (CONT.)

TK14551V

NIP

.ON

51

61

71DEREFFUBISSR

LOBMYS

DNGPMOCISSR

LANIMRET

EGATLOV

TIUCRICTNELAVIUQELANRETNINOITPIRCSED

V0 otlanimretehT:51niP

IF V

CC

ISSRehtetanimret

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PMOCISSR

TUPTUO

ISSR:61niP

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sitiucrictuptuoehT

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IF V

1-TUPTUO

CC

.tuptuO

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81
91

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2-TUPTUOISSR

V

CC

IF V

CC

1-TUPTUOISSR

IF V

CC

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January 2000 TOKO, Inc. Page 9

TK14551V

PIN FUNCTION DESCRIPTION (CONT.)

NIP

.ON

LOBMYS

12EVASYRETTABV

LANIMRET

EGATLOV

SB

100 k

100 k

TIUCRICTNELAVIUQELANRETNINOITPIRCSED

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:FFOevaSyrettaB

V

SB

VotV5.1=

CC

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V

SB

V3.0<

Page 10 January 2000 TOKO, Inc.