Sony CXA1597P, CXA1597M Datasheet

CXA1597M/P

Recording Equalizer Amplifier for Stereo Cassette Decks

Description

The CXA1597M/P is a bipolar IC developed for recording equalizer amplifier in analog cassette decks. It is suited specifically for double cassette decks. Incorporating the filter circuit greatly reduces the external parts.

Features

• Built-in filter required for recording equalizer

amplifiers

• Inductor (coil) is unnecessary

• Low frequency boost is possible with an external

capacitor

• Built-in recording mute function

(requiring only an external time constant circuit to

implement soft mute)

• Fade in/out DC controllable

• NORM/CrO2/METAL tape mode switching function

• NORM/HIGH tape speed recording switching

function

• DC controllable for recording level calibration

(approximately ±6dB variable)

• DC controllable for high frequency equalizer

amplifier gain (approximately ±4dB variable)

• Built-in 2 channels

• Small package

Applications

Recording equalizer amplifier for stereo analog

cassette decks (Supports ALPS ELECTRIC CO.,

LTD. HADKH55-series heads)

CXA1597M

16 pin SOP (Plastic)

CXA1597P

16 pin DIP (Plastic)

Structure

Bipolar silicon monolithic IC

Absolute Maximum Ratings

• Supply voltage VCC 17 V

• Operating temperature Topr –20 to +75 °C

• Storage temperature Tstg –65 to +150 °C

• Allowable power dissipation

PD (CXA1597M) 500 mW

(CXA1597P) 900 mW

Operating Conditions

Supply voltage Dual power supplies (VCC – VEE)

±5.0 to 8.0 V

Single power supply (VCC)

10.0 to 16.0 V

Block Diagram and Pin Configuration

Gp CAL

SPEED

Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.

REC MUTE

CONTROL

TAPE EQ

REC CAL

DGND

REC IN2

CXA1597M/P

REC IN1

IREF

BIAS

GND

BOOST2

BOOST1

REC EQ 2

REC EQ 1

REC OUT2

REC OUT1

– 1 –

E95127-ST

CXA1597M/P

Pin Description (Ta = 25°C, VCC = 7.0V, VEE = –7.0V, DVCC = 5.0V)

Pin No.

Symbol

1 SPEED

2 TAPE EQ

Typical pin voltage

DC AC

——

2.5V —

I/O Z (in) Equivalent circuit Description

Tape speed switching pin.

∗

Normal/Double speed switching.

I—

10k

High = Double speed

DGND

Low = Normal speed

Tape equalizer amplifier switching

∗

(NORM/CrO2/ METAL switching) pin. High = REC EQ METAL

I—

50k

Medium = REC EQ CrO2

DGND

Low = REC EQ NORM

3 DGND

413REC IN1

REC IN2

GND (VG)

0.0V —

0.0V –18dBv

0.0V —

I — Connect to GND.

GND

I 50kΩ

50k

Recording equalizer amplifier input pin.

Connect to GND for positive/

30k

negative dual power supplies.

I 15kΩ

GND

Vcc/2 (center potential) for a single power

30k

supply. (Connect a capacitor of 10µF or more)

– 2 –

CXA1597M/P

Pin No.

Symbol

611BOOST1

BOOST2

VEE

Typical pin voltage

DC AC

0.0V

—

–7.0V —

I/O Z (in) Equivalent circuit Description

Connection pin of an external capacitor for low frequency boost.

∗

When low

280

frequency boost is unnecessary,

9.5kΩ

4.8k 5.5k 35.5k

34k

280

connect to GND for positive/ negative dual power supplies;

GND

connect a capacitor (3.3µF or more) for a single power supply.

Connect to the negative power supply for positive/negative

I—

dual power supplies. Connect to GND for a single power supply.

89REC OUT1

REC OUT2

10 VCC

IREF

0.0V

–3dBv

7.0V —

VEE + 1.2V

—

O 50kΩ

—

O—

8 9

200

50k

Recording equalizer amplifier output pin.

Positive power supply connection pin.

Reference current setting pin for monolithic filter.

∗

The reference current can be set by attaching a resistor between this pin and the VEE pin.

– 3 –

CXA1597M/P

Pin No.

Symbol

REC CAL

REC MUTE

Typical pin voltage

DC AC

2.5V

—

——

I/O Z (in) Equivalent circuit Description

∗

Recording level calibration pin. High = Recording level gain increased

54k

2.5V

54k

DGND

Low = Recording level gain reduced

∗

Leave this pin open when not using the recording level calibration function.

Recording mute ON/OFF selection pin.

∗

Recording mute is controlled with DC voltages of 0 to 5V.

30k

—

2.5V

54k

DGND

High = Recording mute OFF Low = Recording mute ON

∗

Soft mute and fader can be switched over by changing the time constant of the external time constant circuit.

Gp CAL

2.5V

—

High frequency calibration pin.

∗

Controlled with DC voltages of 0 to 5V High = High frequency level

54kΩ

54k

2.5V

54k DGND

gain increased Low = High frequency level gain reduced

∗

Leave this pin open when not using the high frequency calibration function.

– 4 –

CXA1597M/P

Electrical Characteristics (Ta = 25°C, VCC = 7.0V, VEE = –7.0V)

Item Conditions Min. Typ. Max. Unit

Current consumption (ICC) Operating voltage range 1 (positive/

negative dual power supplies) Operating voltage range 2

Entire LSI

(single power supply)

Recording equalizer amplifier Recording reference output level NORM-NORM mode

Recording equalizer amplifier Recording reference input level NORM-NORM mode

NORM-NORM mode REC-EQ frequency response 1 (3kHz, –20dB)

NORM-NORM mode REC-EQ frequency response 2 (8kHz, –20dB)

Recording equalizer amplifier reference output level (315Hz) (This output level is the tape reference 0dB which generates magnetic flux of 250nWb/m) All of the recording equalizer amplifier blocks use this level as their reference level.

Input level when the reference output level is 315Hz, –3.0dBv (For measurement, input a 315Hz, –18.5dBv signal to the REC IN pins (Pins 4 and 13) and then measure the output level.)

NORM-tape, NORM-speed mode Input a 3kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

NORM-tape, NORM-speed mode Input a 8kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

8.0

±5.0

10.0

–20.0

–1.9

2.5

12.0 ±7.0

14.0

–3.0

–18.5

–0.4

4.5

16.0 ±8.0

16.0

–17.0

1.1

6.5

dBv

NORM-NORM mode REC-EQ frequency response 3 (12kHz, –20dB)

CrO

2-NORM mode

REC-EQ frequency response 1 (3kHz, –20dB)

Recording equalizer amplifier

CrO

2-NORM mode

REC-EQ frequency response 2 (8kHz, –20dB)

CrO

2-NORM mode

REC-EQ frequency response 3 (12kHz, –20dB)

METAL-NORM mode REC-EQ frequency response 1 (3kHz, –20dB)

METAL-NORM mode REC-EQ frequency response 2 (8kHz, –20dB)

NORM-tape, NORM-speed mode Input a 12kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

CrO

2-tape, NORM-speed mode

Input a 3kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

CrO

2-tape, NORM-speed mode

Input a 8kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

CrO

2-tape, NORM-speed mode

Input a 12kHz signal (–20dB level down) from the reference to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

METAL-tape, NORM-speed mode Input a 3kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

METAL-tape, NORM-speed mode Input a 8kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

7.3

2.9

7.1

11.3

3.9

7.1

10.3

4.4

9.1

14.3

5.4

9.1

13.3

5.9

11.1

17.3

6.9

11.1

– 5 –

CXA1597M/P

Item Conditions Min. Typ. Max. Unit

METAL-NORM mode REC-EQ frequency response 3 (12kHz, –20dB)

NORM-HIGH mode REC-EQ frequency response 1 (5kHz, –20dB)

NORM-HIGH mode REC-EQ frequency response 2 (15kHz, –20dB)

NORM-HIGH mode REC-EQ frequency response 3 (20kHz, –20dB)

CrO

2-HIGH mode

REC-EQ frequency response 1 (5kHz, –20dB)

CrO

2-HIGH mode

REC-EQ frequency response 2 (15kHz, –20dB)

METAL-tape, NORM-speed mode Input a 12kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

NORM-tape, HIGH-speed mode Input a 5kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

NORM-tape, HIGH-speed mode Input a 15kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

NORM-tape, HIGH-speed mode Input a 20kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

CrO

2-tape, HIGH-speed mode

Input a 5kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

CrO

2-tape, HIGH-speed mode

Input a 15kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

10.4

–1.3

4.0

7.4

3.9

8.6

13.4

0.2

6.5

10.9

5.4

11.1

16.4

1.7

9.0

14.4

6.9

13.6

CrO

2-HIGH mode

REC-EQ frequency response 3 (20kHz, –20dB)

METAL-HIGH mode

Recording equalizer amplifier

REC-EQ frequency response 1 (5kHz, –20dB)

METAL-HIGH mode REC-EQ frequency response 2 (15kHz, –20dB)

METAL-HIGH mode REC-EQ frequency response 3 (20kHz, –20dB)

NORM-NORM mode REC-EQ signal handling

CrO

2-tape, HIGH-speed mode

Input a 20kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

METAL-tape, HIGH-speed mode Input a 5kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

METAL-tape, HIGH-speed mode Input a 15kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

METAL-tape, HIGH-speed mode Input a 20kHz signal (–20dB level down) to the REC IN pins and then measure the relative deviation from NORM-NS, 315Hz mode.

NORM-tape, NORM-speed mode, RL = 2.7kΩ Input a 1kHz signal and set the output so that THD (total harmonic distortion) is 1%. (Measure the distortion of a +11dB level-up signal.)

11.4

5.9

9.5

11.8

11.0

14.9

7.4

12.0

15.3

12.0

18.4

8.9

14.5

18.8

—

NORM-NORM mode REC-EQ total harmonic distortion (1kHz, 0.0dB, RL = 2.7kΩ)

NORM-tape, NORM-speed mode, RL = 2.7kΩ Input a 1kHz, 0.0dB (reference input level) signal and measure the distortion. (Measure the distortion as THD + N.)

– 6 –

—

0.14

0.6

Item Conditions Min. Typ. Max. Unit

NORM-NORM mode REC-EQ S/N ratio 1 ("A"-WGT filter)

NORM-tape, NORM-speed mode, Rg = 5.1kΩ With no signal, measure the noise using the "A"WGT filter. (The measured value is indicated as the relative value compared to the reference level.)

CXA1597M/P

—

NORM-NORM mode Output DC offset voltage (REC OUT pin)

NORM-NORM mode REC-EQ mute characteristics 1 (REC-MUTE = 0.5V)

NORM-NORM mode REC-EQ mute characteristics 2 (REC-MUTE = 2.5V)

NORM-NORM mode REC-EQ REC-CAL characteristics 1 (REC-CAL = 5.0V)

Recording equalizer amplifier

NORM-NORM mode REC-EQ REC-CAL characteristics 2 (REC-CAL = 0.0V)

NORM-tape, NORM-speed mode With no signal, measure the DC offset voltage of the REC OUT pin.

NORM-tape, NORM-speed mode, REC-MUTE = 0.5V Input a 1kHz signal (+12dB level up) and measure the attenuation when REC MUTE is on. (Use a 1kHz BPF.)

NORM-tape, NORM-speed mode, REC-MUTE = 2.5V Input a 1kHz, 0.0dB (reference level) signal and measure the attenuation characteristics curve of the soft mute function. (when REC-MUTE = 2.5V)

NORM-tape, NORM-speed mode, REC-CAL = 5.0V Input a 315Hz signal (–20dB level down) and measure the amount of change compared to when the REC-CAL function is at the standard setting.

NORM-tape, NORM-speed mode, REC-CAL = 0.0V Input a 315Hz signal (–20dB level down) and measure the amount of change compared to when the REC-CAL function is at the standard setting.

–500

—

–7.0

4.1

–8.9

0.0

–91

–5.5

6.1

–6.9

500

–80

–4.0

8.1

–4.9

NORM-NORM mode REC-EQ Gp-CAL characteristics 1 (GP-CAL = 5.0V)

NORM-NORM mode REC-EQ Gp-CAL characteristics 2 (GP-CAL = 0.0V)

Mode control Control circuit high level

Mode control Control circuit medium level

Ternary

switching

Mode control Control circuit low level

Control circuit

Mode control Control circuit high level

Mode control

Binary

switching

Control circuit low level

NORM-tape, NORM-speed mode, Gp-CAL = 5.0V Input a 8kHz signal (–20dB level down) and measure the amount of change compared to when the Gp-CAL function is at the standard setting.

NORM-tape, NORM-speed mode, Gp-CAL = 0.0V Input a 8kHz signal (–20dB level down) and measure the amount of change compared to when the Gp-CAL function is at the standard setting.

TAPE EQ control pin voltage

SPEED control pin voltage

3.9

–5.9

4.2

2.2

0.0

3.5

0.0

5.9

–3.9

—

7.9

–1.9

VCC

2.8

0.5

VCC

0.5

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