Intersil Corporation CA2111A Datasheet

OBSOLETE PRODUCT

CA2111A

[ /Title
(CA21
11A)
/Sub­ject
(FM
IF
Ampli­fier­Limiter
and
Quadra
ture
Detec­tor)
/Autho
r ()
/Key­words
(Har­ris
Semi­con­ductor,
FM IF
ampli­fier,
quadrat
ure
detec­tor,
lim­iter,
TV
audio
IF,
high
AM
rejec­tion,

NO RECOMMENDED REPLACEMENT

May 1999

Call Central Applications 1-800-442-7747

or email: [e-mail]

Features

• Input Limiting Voltage At 10.7MHz . . . . . . . . . . . 400µV

• Input Limiting Voltage At 4.5, 5.5MHz . . . . . . . . 250µV

• Typical AM Rejection At 10.7MHz. . . . . . . . . . . . . 45dB

• Provision for Output fr om 3-Stage IF Amplifier Section

• Low Harmonic Distortion

• Quadrature Detection Permits Simplified Single-Coil
Tuning

• Extremely Low AFC Voltage Drift Over Full Operating
Temperature Range

• Minimum Number of External Components Required

Applications

• FM IF Sound

• TV Sound IF

Pinout

CA2111A

(PDIP)

TOP VIEW

AUDIO OUT

REF BIAS

DC FB BYPASS
INPUT BYPASS

GROUND

NC

IF IN

1
2
3
4
5
6
7

14

DE-EMPHASIS

13

V+

12

QUADRATURE INPUT

11

QUADRATURE IN BUF

10

HIGH IF OUTPUT

9

LOW IF OUTPUT

8

NC

FM IF Amplifier-Limiter

and Quadrature Detector

Description

The CA2111A provides a multistage wideband amplifier­limiter, a quadrature detector, and an emitter-follower output
stage. This device is designed f or use in FM receivers and in
the sound IF sections of TV receivers. In addition, an output
terminal is provided which allows the use of the amplifier­limiter as a straight 60dB wideband amplifier.

The amplifier-limiter features the excellent limiting character­istic of 3 cascaded differential amplifiers. The quadrature
detector requires only one coil in the associated outboard
circuit and therefore, tuning is a simple procedure.

A unique feature of the CA2111A is its exceptionally low
AFC voltage drift over the full operating-temperature range.

Part Number Information

TEMP.

PART NUMBER

CA2111AE -40 to 85 14 Ld PDIP E14.3

RANGE (oC) PACKAGE

Block Diagram

L

1

0.1µF

51Ω

4

6

0.1µF

5

V+

+12V

13

AMPLIFIER-

BIAS

10

LIMITER

11

3pF

12

9

QUADRATURE

DETECTOR

EMITTER

FOLLOWER

14

0.003µF

C

1

8

PKG.

NO.

14µH

120pF

23

1

7

CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright

© Harris Corporation 1999

8-13

File Number 612.2

CA2111A

Absolute Maximum Ratings T

Supply Voltage (V+ to V-). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V

=25oC Thermal Information

A

Thermal Resistance (Typical, Note 1) θJA (oC/W)

PDIP Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Operating Conditions

Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . -40oC to 85oC

Supply Voltage Range (Typical) . . . . . . . . . . . . . . . . . . . . 8V to 12V

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

Maximum Junction Temperature (Plastic Package) . . . . . . . . 150oC

Maximum Storage Temperature Range . . . . . . . . . -65oC to 150oC

Maximum Lead Temperature (Soldering 10s). . . . . . . . . . . . . 300oC

NOTES:

1. θJA is measured with the component mounted on an evaluation PC board in free air.

Electrical Specifications T

= 25oC Unless Otherwise Specified

A

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS

Terminal 1 DC Voltage

Terminals 4, 5, 6, 10 DC Voltage
Terminals 2, 12 DC Voltage
Supply Current, Pin 13

Amplifier Input Resistance
Amplifier Input Capacitance
Detector Input Resistance
Detector Input Capacitance
Amplifier Output Resistance
Detector Output Resistance
De-emphasis Resistance

V

V

4, 5, 6, 10

V

2, 12

I

13

R

C
R
C
R

R
R

V+ = 12V

1

V+ = 8V

- 5.4 - V

- 3.7 - V
V+ = 8V - 1.35 - V
V+ = 8V - 3.5 - V

4

4

12

12

10

1

14

V+ = 8V
V+ = 12V
fO = 10.7MHz

-14- mA

-16- mA

-7-kΩ

-11- pF

-70- kΩ

- 2.7 - pF

-60- Ω

- 200 - Ω

- 8.8 - kΩ

DYNAMIC CHARACTERISTICS fO = 10.7MHz, ∆f = ±75kHz, V+ = 8V, FM Modulation Frequency = 400Hz, Source Resistance = 50Ω
Input Limiting Threshold Voltage

AM Rejection
Amplifier Voltage Gain
Detector Recovered Audio Output
Total Harmonic Distortion

V

I(LIM)

AMR

V

O(AF)

THD

- 400 600 µV
VI= 10mV

V

VI= 50µV

A

VI= 10mV
VI= 10mV

, 100% FM, 30% AM

RMS

RMS -55- dB

RMS - 0.3 - V
RMS -1- %

-37- dB

RMS

RMS

DYNAMIC CHARACTERISTICS fO = 10.7MHz, ∆f = ±75kHz, V+ = 12V, FM Modulation Frequency = 400Hz, Source Resistance = 50Ω
Input Limiting Threshold Voltage

AM Rejection
Amplifier Voltage Gain
Detector Recovered Audio Output
Total Harmonic Distortion

V

I(LIM)

AMR

V

O(AF)

THD

- 400 600 µV
VI= 10mV

V

VI= 50µV

A

VI= 10mV
VI= 10mV

, 100% FM, 30% AM

RMS

RMS -55- dB

RMS - 0.48 - V
RMS -1- %

-45- dB

RMS

RMS

DYNAMIC CHARACTERISTICS fO = 4.5MHz, ∆f = ±25kHz, V+ = 12V, FM Modulation Frequency = 400Hz, Source Resistance = 50Ω
Input Limiting Threshold Voltage

AM Rejection

V

I(LIM)

AMR

VI= 10mV

, 100% FM, 30% AM

RMS

- 250 400 µV

RMS

-36- dB

8-14