Philips NE604AD, SA604AN, SA604AD Datasheet

Philips Semiconductors

SA604A

High performance low power FM IF
system

Product specification
Replaces data of December 15, 1994

1997 Nov 07

RF COMMUNICATIONS PRODUCTS

IC17 Data Handbook

Philips Semiconductors Product specification

SA604AHigh performance low power FM IF system

2

1997 Nov 07 853-1431 18663

DESCRIPTION

The SA604A is an improved monolithic low-power FM IF system
incorporating two limiting intermediate frequency amplifiers,
quadrature detector, muting, logarithmic received signal strength
indicator, and voltage regulator. The SA604A features higher IF
bandwidth (25MHz) and temperature compensated RSSI and
limiters permitting higher performance application compared with the
SA604. The SA604A is available in a 16-lead SO (surface-mounted
miniature) package.

FEA TURES

•Low power consumption: 3.3mA typical

•Temperature compensated logarithmic Received Signal Strength

Indicator (RSSI) with a dynamic range in excess of 90dB

•Two audio outputs - muted and unmuted

•Low external component count; suitable for crystal/ceramic filters

•Excellent sensitivity: 1.5µV across input pins (0.22µV into 50Ω

matching network) for 12dB SINAD (Signal to Noise and Distortion
ratio) at 455kHz

•SA604A meets cellular radio specifications

PIN CONFIGURATION

D Package

IF AMP DECOUPLING

1
2
3
4
5
6
7
8

9

10

11

12

13

14

16
15

GND

MUTE INPUT

RSSI OUTPUT

MUTE AUDIO OUTPUT

UNMUTE AUDIO OUTPUT

QUADRATURE INPUT

IF AMP INPUT
IF AMP DECOUPLING
IF AMP OUTPUT

GND
LIMITER INPUT
LIMITER DECOUPLING
LIMITER DECOUPLING
LIMITER

V

CC

SR00311

Figure 1. Pin Configuration

APPLICATIONS

•Cellular radio FM IF

•High performance communications receivers

•Intermediate frequency amplification and detection up to 25MHz

•RF level meter

•Spectrum analyzer

•Instrumentation

•FSK and ASK data receivers

ORDERING INFORMATION

DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG #

16-Pin Plastic Small Outline (SO) package (Surface-mount) -40 to +85°C SA604AD SOT109-1

ABSOLUTE MAXIMUM RATINGS

SYMBOL PARAMETER RATING UNITS

V

CC

Single supply voltage 9 V

T

STG

Storage temperature range -65 to +150 °C

T

A

Operating ambient temperature range SA604A 40 to +85 °C

θ

JA

Thermal impedance D package 90 °C/W

Philips Semiconductors Product specification

SA604AHigh performance low power FM IF system

1997 Nov 07

3

BLOCK DIAGRAM

16 15 14 13 12 11 10 9

87654321

SIGNAL

VOLTAGE

IF
AMP

LIMITER

REGULATOR

STRENGTH

GND

V

CC

GND

MUTE

QUAD

DET

LIMITER

SR00312

Figure 2. Block Diagram

DC ELECTRICAL CHARACTERISTICS

VCC = +6V, TA = 25°C; unless otherwise stated.

LIMITS

SYMBOL PARAMETER TEST CONDITIONS SA604A UNITS

MIN TYP MAX

V

CC

Power supply voltage range 4.5 8.0 V

I

CC

DC current drain 2.5 3.3 4.0 mA
Mute switch input threshold (ON)

(OFF)

1.7

1.0

V
V

Philips Semiconductors Product specification

SA604AHigh performance low power FM IF system

1997 Nov 07

4

AC ELECTRICAL CHARACTERISTICS

Typical reading at TA = 25°C; VCC = ±6V, unless otherwise stated. IF frequency = 455kHz; IF level = -47dBm; FM modulation = 1kHz with
±8kHz peak deviation. Audio output with C-message weighted filter and de-emphasis capacitor. Test circuit Figure 3. The parameters listed

below are tested using automatic test equipment to assure consistent electrical characterristics. The limits do not represent the ultimate
performance limits of the device. Use of an optimized RF layout will improve many of the listed parameters.

LIMITS

SYMBOL PARAMETER TEST CONDITIONS SA604A UNITS

MIN TYP MAX

Input limiting -3dB Test at Pin 16 -92 dBm/50Ω
AM rejection 80% AM 1kHz 30 34 dB
Recovered audio level 15nF de-emphasis 80 175 260 mV

RMS

Recovered audio level 150pF de-emphasis 530 mV

RMS

THD Total harmonic distortion -34 -42 dB

S/N Signal-to-noise ratio No modulation for noise 73 dB

RF level = -118dBm 0 160 650 mV

RSSI output

1

RF level = -68dBm 1.9 2.65 3.1 V

RF level = -18dBm 4.0 4.85 5.6 V
RSSI range R4 = 100k (Pin 5) 90 dB
RSSI accuracy R4 = 100k (Pin 5) ±1.5 dB
IF input impedance 1.4 1.6 kΩ
IF output impedance 0.85 1.0 kΩ
Limiter input impedance 1.4 1.6 kΩ
Unmuted audio output resistance 58 kΩ
Muted audio output resistance 58 kΩ

NOTE:

1. SA604 data sheets refer to power at 50Ω input termination; about 21dB less power actually enters the internal 1.5k input.
SA604 (50) SA604A (1.5k)/SA605 (1.5k

-97dBm -118dBm

-47dBm -68dBm
+3dBm -18dBm

The SA605 and SA604A are both derived from the same basic die. The SA605 performance plots are directly applicable to the SA604A.