Philips sa614a DATASHEETS

RF COMMUNICATIONS PRODUCTS

SA614A

Low power FM IF system

Product specification
Replaces data of December 15, 1994

IC17 Data Handbook

Philips Semiconductors

1997 Nov 07

Philips Semiconductors Product specification

SA614ALow power FM IF system

DESCRIPTION

The SA614A 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 SA614A features higher IF
bandwidth (25MHz) and temperature compensated RSSI and
limiters permitting higher performance application compared with the
SA604. The SA614A is available in a 16-lead dual-in-line plastic
and 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

•SA614A meets cellular radio specifications

PIN CONFIGURATION

D and N Packages

IF AMP DECOUPLING

GND

MUTE INPUT

V

CC

RSSI OUTPUT

MUTE AUDIO OUTPUT

UNMUTE AUDIO OUTPUT

QUADRATURE INPUT

Figure 1. Pin Configuration

1
2
3
4
5
6
7
8

16

IF AMP INPUT

15

IF AMP DECOUPLING

14

IF AMP OUTPUT

13

GND

12

LIMITER INPUT

11

LIMITER DECOUPLING

10

LIMITER DECOUPLING

9

LIMITER

SR00323

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 Dual In-Line Package (DIP) -40 to +85°C SA614AN SOT38-4
16-Pin Plastic Small Outline (SO) package (Surface-mount) -40 to +85°C SA614AD SOT109-1

1997 Nov 07 853-0594 18663

2

Philips Semiconductors Product specification

SA614ALow power FM IF system

BLOCK DIAGRAM

16 15 14 13 12 11 10 9

GND

VOLTAGE

REGULATOR

GND

IF
AMP

SIGNAL

STRENGTH

V

CC

LIMITER

LIMITER

MUTE

QUAD

DET

87654321

SR00324

Figure 2. Block Diagram

ABSOLUTE MAXIMUM RATINGS

SYMBOL PARAMETER RATING UNITS

T

V

θ

CC

STG

T

A

JA

Single supply voltage 9 V
Storage temperature range -65 to +150
Operating ambient temperature range SA614A -40 to +85

Thermal impedance D package

N package

90
75

°C
°C

°C/W
°C/W

DC ELECTRICAL CHARACTERISTICS

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

LIMITS

SYMBOL PARAMETER TEST CONDITIONS SA614A UNITS

MIN TYP MAX

V

CC

I

CC

Power supply voltage range 4.5 8.0 V
DC current drain 2.5 3.3 4.0 mA
Mute switch input threshold (ON)

(OFF)

1.7

1.0

V
V

1997 Nov 07

3

Philips Semiconductors Product specification

SA614ALow power FM IF system

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 SA614A UNITS

MIN TYP MAX

Input limiting -3dB Test at Pin 16 -92 dBm/50Ω
AM rejection 80% AM 1kHz 25 33 dB
Recovered audio level 15nF de-emphasis 60 175 260 mV
Recovered audio level 150pF de-emphasis 530 mV

THD Total harmonic distortion -30 -42 dB

S/N Signal-to-noise ratio No modulation for noise 68 dB

RF level = -118dBm 0 160 800 mV

RSSI output

RSSI range R4 = 100k (Pin 5) 80 dB
RSSI accuracy R4 = 100k (Pin 5) +2.0 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. SA614A data sheets refer to power at 50Ω input termination; about 21dB less power actually enters the internal 1.5k input.

The SA615 and SA614A are both derived from the same basic die. The SA615 performance plots are directly applicable to the SA614A.

1

RF level = -68dBm 1.7 2.50 3.3 V
RF level = -18dBm 3.6 4.80 5.8 V

SA614A (50) SA614A (1.5k)/SA615 (1.5k)

-97dBm -118dBm

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

RMS
RMS

1997 Nov 07

4

Philips Semiconductors Product specification

SA614ALow power FM IF system

F

SA614A

1

C

4

C

C

5

6

87654321

Q = 20 LOADED

F

2

C

7

NE614A TEST CIRCUIT

C

1

INPUT

R

1

C

3

R

16 15 14 13 12 11 10 9

C

2

2

R

3

100nF + 80 – 20% 63V K10000–25V Ceramic

C1

100nF +10% 50V

C2

100nF +

C3
C4
C5
C6
C7
C8

C9
C10
C11
C12

F1
F2

R1

R2

R3

R4

10% 50V
100nF +10% 50V
100nF +

10% 50V

2% 100V NPO Ceramic

10pF +
100nF +

10% 50V

10% 50V

100nF +

10% 50V

15nF +

2% 100V N1500 Ceramic

150pF +

10% 100V K2000-Y5P Ceramic

1nF +

6.8µF +

20% 25V Tantalum
455kHz Ceramic Filter Murata SFG455A3
455kHz (Ce = 180pF) TOKO RMC 2A6597H
51Ω +

1% 1/4W Metal Film

1% 1/4W Metal Film

1500Ω +

5% 1/8W Carbon Composition

1500Ω +

1% 1/4W Metal Film

100kΩ +

SIGNETICS

NE614 TEST CKT

ON

V

CC

E

OFF

GND

M

U

T

RSSI AUDIO DATA

S

1

MUTE
INPUT

C

12

IF INPUT

C

8

R

C

11

4

RSSI

OUTPUT

C

9

AUDIO

OUTPUT

SIGNETICS

C

10

DATA

OUTPUT

IF INPUT

NE614 TEST CKT

ON

V

CC

GND

GND

E

OFF

GND

M

U

T

RSSI AUDIO DATA

1997 Nov 07

GND

GND

SR00325

Figure 3. SA614A Test Circuit

5