SHM-12S 데이터 시트보기 (PDF) - DATEL Data Acquisition products

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SHM-12S

Ultra-Fast, 12-Bit Linear Monolithic Sample-Hold Amplifiers

DATEL Data Acquisition products  

®

®

SHM-12

GROUNDING AND LAYOUT

Obtaining fully specified performance from the SHM-12 requires

careful attention to pc-board layout and power supply decoupling.

For optimal performance, tie all grounds directly to a large ana-

log ground plane beneath and around the package. Bypass all

power supplies to ground with 10µF tantalum capacitors in paral-

lel with 0.1µF ceramic capacitors.

Locate the bypass capacitors as close to the unit as possible.

For best performance, controlled impedance transmission line

techniques, such as microstrip, should be used. Mount all com-

ponents as close to the required pins as possible. It is strongly

recommended that the SHM-12 not be socket-mounted.

ANALOG

INPUT

0.1µF

50Ω

0.1µF

10µF

0.1µF

SHM-12

19

SAMPLE / HOLD

50Ω

50Ω

SAMPLE

1

–5V SUPPLY

18

SAMPLE / HOLD

HOLD

2

–5V SUPPLY

20

+5V SUPPLY

0.1µF

4

INPUT

17

+5V SUPPLY

5

–5V SUPPLY

7

–5V SUPPLY

9

–5V SUPPLY

EXTERNAL HOLD

CAPACITOR

GROUND

+5V SUPPLY

15

CHO LD

14, 16

13

Refer to Table 1 for optional

HOLD capacitor value.

0.1µF

12

+5V SUPPLY

10

–5V SUPPLY

11

OUTPUT

Pin 3 is not connected;

do not connect pins 6 and 8.

R Load

100Ω

0.1µF

10µF

ANALOG

OUTPUT

0.1µF

–5V

+5V

Figure 2. SHM-12 Simplified Connection Diagram

HOLD

SAMPLE

-0.8 V

-1.8 V

-0.8 V

-1.8 V

ANALOG

INPUT

+1 V

-1 V

ANALOG

OUTPUT

+1 V

-1 V

SAMPLE

HOLD

SAMPLE

HOLD

Acquisition

Time to

±0.024%

15ns typ.

7ns typ.

Track-to-hold Settling

to ±0.024%

Feedthrough -80dB

Figure 3. SHM-12 Control and Timing

3

7ns typ.

15ns typ.

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