NJM2594V-TE1 Datasheet NJM2594V-TE1 | P4-P6

NJM2594

- 4 -

! TERMINAL FUNCTION

(Ta=25°C,V

+

=5.0V)

Pin No.

SYMBOL

EQUIVARENT CIRCUIT VOLTAGE FUNCTION

1 V

+

5V

Power Supply.

2 OUTPUT1 4.0V

Collector Output.

3 OUTPUT2

3.3V

Emitter Output.

Since there is no internal

resistor to the ground,

emitter current may be

obtained by connecting an

external resistor.

This terminal voltage is

obtained with a 510Ω

external resistor.

4 GND --

Ground.

5

SIGNAL

INPUT

2.2V

Signal Input Terminal.

6

BYPASS 2.2V

Common base lead of two

differential circuits.

This terminal should be

connected externally to AC

ground.

7

CARRIER

INPUT

2.2V

Carrier Input Terminal.

8 NC

--

No Connect.

The NC terminal is not

connected to internal circuit

so that this terminal can be

open or grounded.

1

3

2

V

+

＋

5 6

7

V+

NJM2594

-

5

-

! APPLICATION CIRCUIT

" Emitter - follower output

APPLICATION CIRCUIT 1

" Collector output

APPLICATION CIRCUIT 2

" The impedance of AC coupling capacitor connected to input / output terminals should be adequately low at the

frequency of input / output signals, respectably.

" The impedance of base-coupling capacitor connected to BYPASS terminal should be adequately low against

the both of input/output signals to keep better performance on leakage and distortion characteristics.

" In case of APPLICATION CIRCUIT 1, idle (emitter) current may be supplied by adding an external resistor

between OUTPUT2 (pin3) and ground.

The relation of idle current Ii and external resistance RL is determined by :

! Note that there is some degradation in intermodulation characteristics with increasing the external resistance

RL, or decreasing a load impedance of Emitter-follower output.

" The level of output signal comes constant at carrier input signal level over 100mV ( see Typical Characteristics).

Signal Input

Fs

Carrier Input

Fc

Rc=

350Ω

0.022uF

V+

0.01uF

4

3

2

1

5

6

7

8

Open

Cs

V+

Cb

Cc

Ground or

Open

Collector

Output

Signal Input

Fs

Carrier Input

Fc

Rc=

350Ω

0.022uF

V+

Ii

4

3

2

1

5

6

7

8

Open

Cs

V+

Cb

Cc

Ground or

Open

Emitter-

follower

Output

RL

0.01uF

RL~

V

+

-1.7

Ii

RL~

V

+

-1.7

Ii

NJM2594

-

6

-

!

HOW TO DECREASE LEAKAGE LEVEL

By adjusting DC bias of SIGNAL INPUT terminal, carrier leakage level may be decreased. By adjusting DC bias of

CARRIER INPUT terminal, signal leakage level may be decreased. In actual circuit, it can be seen the case that

either of these adjustment is provided, not both.

LEAKAGE ADJUSTMENT CIRCUIT

!

EVALUATION PC BOARD

The evaluation PC board shown in next page is useful for your design and is intended to have more understanding

of the usage and performance of this device. Two kinds of board are prepared for two packages, SSOP and DMP,

respectively. Each board can be applied to two kinds of circuit, emitter-follower output type and collector output type,

as shown below. This circuit is the same as MEASUREMENT CIRCUIT. For other electrical conditions, it should be

necessary to reconsider each value of components, especially of capacitance.

Note that this board is not prepared to show the recommendation of pattern and parts layout.

● Emitter - follower output

● Collector output

Singal Input

Fs

Carrier Input

Fc

V+

4

3

2

1

5

6

7

8

10kΩ

220kΩ 220kΩ

Variable Resistor for

Signal Leakage Level

Adjustment

10kΩ

Variable Resistor for

Carrier Leakage Level

Adjustment

(1)

(2)

(3)

(5)

(4)

(6)

(7)

(8)

Signal Input

Fs

V+

Carrier Input

Fc

0.01uF

50Ω

0.022uF

RL

0.01uF

4

3

2

1

5

6

7

8

Open

0.01uF

Output

(1)

(2)

(3)

(5)

(4)

(6)

(9)

(11)

(10)

(12)

0.022uF

Signal Input

Fs

Carrier Input

Fc

0.01uF

50Ω

V+

0.01uF

4

3

2

1

5

6

7

8

Open

0.01uF

330Ω

4.3kΩ

47Ω

A

Output

(50Ω)

NJM2594V-TE1

NJM2594V-TE1

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