Philips (Now NXP) TDA1575T Schematic [ru]

INTEGRATED CIRCUITS

DATA SH EET

TDA1575T

FM front end circuit for
CENELEC EN 55020 applications

Preliminary specification
Supersedes data of October 1990
File under Integrated Circuits, IC01

April 1993

Philips Semiconductors Preliminary specification

FM front end circuit for

TDA1575T

CENELEC EN 55020 applications

FEATURES

• Bipolar integrated FM front end circuit, designed for use
in car radios and home receivers

• Fulfils CENELEC EN 55020 requirements

• Radio frequency range of

76 to 90 MHz (Japan) or

87.5 to 108 MHz (Europe, USA)

• Low noise oscillator, buffered oscillator output

• Double balanced mixer

• Internal buffered mixer driving

• Linear IF amplifier, suitable for ceramic IF filters

• Regulated reference voltage.

QUICK REFERENCE DATA

SYMBOL PARAMETER MIN. TYP. MAX. UNIT

V

P

I

P

V

REF

Z

I

NF noise figure of mixer − 9 − dB
EMF1 3rd order intermodulation − 115 − dBµV
V

OSC

THD total harmonic distortion −−15 − dBC
G

v

NF IF noise figure − 6.5 − dB
Z

I

Z

O

EMF2 AGC wideband threshold (RMS value) − 17 − mV

supply voltage 7 8.5 10 V
supply current, without mixer − 23 − mA
reference voltage output − 4.2 − V
mixer input impedance − 14 −Ω

oscillator buffer output signal (RMS value) 75 −−mV

IF gain − 30 − dB

IF input impedance − 300 −Ω
IF output impedance − 300 −Ω

ORDERING INFORMATION

EXTENDED

TYPE NUMBER

PINS PIN POSITION MATERIAL CODE

PACKAGE

TDA1575T 16 mini-pack plastic SOT109A

Note

1. SOT109-1; 1996 August 29.

April 1993 2

(1)

Philips Semiconductors Preliminary specification

FM front end circuit for
CENELEC EN 55020 applications

TDA1575T

Coils TOKO
L1: MC-108 514 HNE-150023S14; L = 78 nH, N = 4 turns
L2: MC-111 E516 HNS-200057; L = 80 nH
L3: A119 ACS-17114 FTT

Fig.1 Block diagram and test circuit.

April 1993 3

Philips Semiconductors Preliminary specification

FM front end circuit for
CENELEC EN 55020 applications

PINNING

SYMBOL PIN DESCRIPTION

MIXI1 1 RF input 1 to mixer
MIXI2 2 RF input 2 to mixer
AGCI 3 HF input to automatic gain control
GND 4 ground (0 V)
V

REF

OSCO 6 oscillator output
OSCI1 7 oscillator input 1
OSCI2 8 oscillator input 2
LO 9 buffered oscillator output
IFO 10 linear FM IF output
IFI1 11 FM IF input 1
IFI2 12 FM IF input 2
V

P

MIXO1 14 mixer output 1
MIXO2 15 mixer output 2
AGCO 16 automatic gain control output

5 reference voltage output

13 supply voltage (+8.5 V)

TDA1575T

Fig.2 Pin configuration.

LIMITING VALUES

Limiting values in accordance with the Absolute Maximum System (IEC 134).

SYMBOL PARAMETER MIN. MAX. UNIT

V
V
P
T
T
V

P
14, 15
tot
stg
amb
ESD

supply voltage (pin 13) 0 12 V
voltage at mixer output 0 V

P

V
total power dissipation 0 380 mW
storage temperature range −55 +150 °C
operating ambient temperature range −40 +85 °C
electrostatic handling (see note 1)

all pins except 3 and 10 −±2000 V
pin 3 − +2000 V

−−1000 V

pin 10 − +1500 V

−−2000 V

Note to the limiting values

1. Equivalent to discharging a 100 pF capacitor through a 1.5 kΩ series resistor.

April 1993 4

Philips Semiconductors Preliminary specification

FM front end circuit for

TDA1575T

CENELEC EN 55020 applications

CHARACTERISTICS

V

= 8.5 V and T

P

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

V

P

I

P

V

REF

Mixer

I

14+15

V

1,2

Z

1,2

V

14,15

C

14,15

G

P

EMF1

IP3

NF noise figure − 9 − dB

= +25°C, measurements taken in Fig.1 with f0 = 98 MHz (EMF1) unless otherwise specified.

amb

supply voltage (pin 13) 7 8.5 10 V
supply current without mixer 16 23 30 mA
reference voltage (pin 5) I5 ≤ 3 mA 3.9 4.2 4.4 V

mixer supply current (pins 14 and 15) − 4 − mA
DC voltage input (pins 1 and 2) − 1 − V
input impedance − 14 −Ω
DC output voltage (pins 14 and 15) 4 − 10 V
output capacitance − 13 − pF
conversion power gain note 1 − 14 − dB
3rd order intercept point − 115 − dBµV

total noise figure including

− 11 − dB

transforming network

Oscillator

V

7,8

V

6

∆f residual FM at pin 6 f = 300 to 15000 Hz;

DC input voltage (pins 7 and 8) − 1.3 − V
DC output voltage (pin 6) − 2.0 − V

− 2.2 − Hz

de-emphasis 50 µs

Oscillator buffered output (pin 9)

V

O

V

9

R

9

output signal (RMS value) RL= 500 Ω; CL= 2 pF 75 −−mV
DC output voltage − 6 − V

DC output resistor − 950 −Ω
THD total harmonic distortion −−15 − dBC
f

S

spurious frequencies EMF1 = 2 V;

−−37 − dBC
RS= 50 Ω;
f

= 108.7 MHz

OSC

Automatic gain control (AGC)

R

3

C

3

V

16

I

16

EMF2 threshold (RMS value) I

input resistance (pin 3) − 4 − kΩ
input capacitance − 3 − pF
AGC output swing (DC) Figs 3 and 4 0.5 − VP − 0.3 V
output current at I3 = 0 V16 =1⁄2V
output current at U

= 2 V V16 = 7 to 10 V 2 − 5mA

3

= 0; V16 =1⁄2VP;

16

P

−25 −50 −150 µA

− 17 − mV

Figs 4 and 5

April 1993 5

Philips Semiconductors Preliminary specification

FM front end circuit for

TDA1575T

CENELEC EN 55020 applications

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Linear IF amplifier

V
Z
C
V
Z
C
V
G
∆G

11,12
12-11

12-11
10
10

10
O

v

v

DC input voltage (pins 11 and 12) − 1.25 − V
input impedance 240 300 360 Ω
input capacitance − 13 − pF
DC output voltage (pin 10) − 4.4 − V
output impedance 240 300 360 Ω
output capacitance − 3 − pF
output signal (RMS value) −1 dB compression −−650 mV
IF voltage gain (20 log (V

10−4

/ V

12−11

IF voltage gain deviation T

NF noise figure R

Note

1. GP = 10 log (4V

×10.7 MHz) / (EMF2 × 98 MHz)2 × (RS1 / RML).

o mix

IF = 10.7 MHz

)) 27 30 − dB

= −40 to +85 °C − 0 − dB

amb

= 300 Ω−6.5 − dB

S

Fig.3 AGC output voltage V16 as a function of

Vi3 RMS at I16 = 0, measured in test circuit
Fig.1.

April 1993 6

Fig.4 AGC output current I16 as a function of

Vi3RMS at V16 = 8.5 V, measured in test
circuit Fig.1.