3

SL3522

15

3

Degrees

Degrees

Min.

Typ.

Max.

Phase variation with RF

Input level

Phase tracking between

units

See notes 2, 7

See notes 2, 7

Units

Value

Conditions

Parameter

Pin

ELECTRICAL CHARACTERISTICS (cont.)

Notes

1 RF output buffer OFF (pin 8 disconnected from 0V)

2 RF output buffer ON (pin 8 connected to 0V)

3 Minimum dynamic range under any single set of operating conditions

4 Log linearity guaranteed for pin = -64dBm to +6dBm for ALL supply, temperature and frequency conditions

5 Full range of supply, temperature and frequency conditions

6 Input limiting range typically -50dBm to +10dBm

7 Not tested, but guaranteed by characterisation

8 Not tested, but guaranteed by design

The SL3522 CANNOT be GUARANTEED to operate below 100MHz and meet the electrical characteristics shown above.

However, characterisation has shown that the device can still function adequately down to frequencies of 50MHz, with the following

reservations:-

1)The video bandwidth is fixed to approx 40MHz a certain amount of carrier breakthrough on the video O/P (pin 13) will occur,

with input signal frequencies below 100MHz.

2)There are 2 RF coupling capacitors (20pF) on-chip, which couple the output signal from stage 3 to the input of stage 4 (ref

Fig. 24). These can introduce undesirable limiting phase performance for input signal frequencies below 100MHz.

Fig.3 Test circuit

L3

VIDEO

OUTPUT

470

18p

200

10n

OFFSET

ADJUST

10n

10n

10n

L4

L5

GAIN

ADJUST

L2

10n

1n

1n

SW1

15

16

17

18

19

20

21

22

23

24

25

14

13

12

11

10

9

8

7

6

5

4

100

65

4

12

3

ANZAC

TP101

RF OUTPUT

10n

3

2

1

26

27

28

10n

L1

12

3

65

4

ANZAC

TP101

RF INPUT

NOTES

1.

Inductors L1 to L5 = 3 TURNS

30SWG on Ferrite bead.

2.

D.U.T. mounted in a test socket

– ENPLAS OTS–28–1.27–04

3.

Transmission line BALUNS used

– not recommended in Application (see Para 3C)

1k5

SL3552