Product specification
Supersedes data of October 1992
File under Integrated Circuits, IC01
Philips Semiconductors
September 1994
Philips SemiconductorsProduct specification
AM/FM stereo radio circuitTEA5711; TEA5711T
FEATURES
• Wide supply voltage range: 1.8 or 2.1 to 12 V
• Low current consumption: 15 mA at AM, 16 mA at FM
• Designed for simple and reliable printed-circuit board
layout
• High impedance MOSFET input on AM.
• High selectivity with distributed IF gain
• LED driver for stereo indication
• High input sensitivity: 1.6 mV/m (AM), 2.0 µV (FM) for
26 dB S/N
• Good strong signal behaviour: 10 V/m at AM,
APPLICATIONS
• Portable AM/FM stereo radio
• Mini/midi receiver sets
• Personal headphone radio.
500 mV at FM
• Low output distortion: 0.8% at AM, 0.3% at FM
• Signal level output
• Soft mute
• Signal dependent stereo
DESCRIPTION
The TEA5711 is a high performance Bimos IC for use in
AM/FM stereo radios. All necessary functions are
integrated: from AM and FM front-end to AM detector and
FM stereo output stages.
QUICK REFERENCE DATA
SYMBOLPARAMETERCONDITIONSMIN.TYP.MAX.TYP.
V
P
V
P
I
P
dynamic supply voltage1.8−12V
static supply voltage2.1−12V
supply current
AM mode11.915.018.9mA
FM mode13.516.520.2mA
T
amb
operating ambient temperature−15−+60°C
AM performance
V
in1
V
28
RF sensitivity405570µV
AF output voltage364570mV
THDtotal harmonic distortion−0.82.0%
FM performance
V
in3
V
28
RF sensitivity1.02.03.8µV
AF output voltage506172mV
The AM circuit incorporates a double balanced mixer, a
one pin low-voltage oscillator (up to 30 MHz) a
field-strength indicator output and is designed for
distributed selectivity.
The AM input is designed to be connected to the top of a
tuned circuit. AGC controls the IF amplification and for
large signals it lowers the input impedance.
The first AM selectivity can be an IFT as well as an IFT
combined with a ceramic filter; the second one is an IFT.
The FM circuit incorporates a tuned RF stage, a double
balanced mixer, a one-pin oscillator, a field-strength
indicator output and is designed for distributed IF ceramic
filters. The FM quadrature detector uses a ceramic
resonator.
The PLL stereo decoder incorporates a signal dependent
stereo circuit, a soft-mute circuit and a stereo indicator
LED driver.
Supply voltage behaviour
The TEA5711 incorporates internal stabilized power
supplies. The maximum supply voltage is 12 V, the
minimum voltage can go down temporarily to 1.8 V without
any loss in performance.
Due to the capacitor at pin 19 (RIPPLE) the IC gives
excellent performance, even when the actual supply
voltage at pin 25 (V
) drops below the voltage at pin 19
P
(RIPPLE).
Figures 4, 5 and 6 show that V
, which is dominant for
stab
the overall IC performance, remains unaffected, even if V
drops down to 1.8 V or less. In this typical example the
static or average VP is equal to 2.5 V. Dips in V
stab
appear
only when the peak-to-peak value of the AC-component of
VP> 2 V, i.e. when the dynamic value of VP drops down to