SHM-14 Ver la hoja de datos (PDF) - DATEL Data Acquisition products

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Fabricante

SHM-14

Ultra-Fast, 14-Bit Linear Monolithic Sample-Hold Amplifiers

DATEL Data Acquisition products  

®

®

SHM-14

GROUNDING AND LAYOUT

Obtaining fully specified performance from the SHM-14 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 par-

allel 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-14 not be socket-mounted.

ANALOG

INPUT

0.1µF

50Ω

0.1µF

10µF

SHM-14

1 (2)

–5V SUPPLY

3 (4)

INPUT

5 (7)

– 5V SUPPLY

8 (10)

– 5V SUPPLY

16 (19)

SAMPLE / HOLD

15 (18)

SAMPLE / HOLD

14 (17)

+5V SUPPLY

EXTERNAL HOLD

CAPACITOR

GROUND

13 (15)

12 (14)

11 (13)

+5V SUPPLY

+5V SUPPLY

ANALOG OUTPUT

10 (12)

9 (11)

50 Ω

50Ω

0.1µF

SAMPLE

HOLD

C HOLD

Refer to Table 1 for optional

HOLD capacitor values.

0.1µF

0.1µF

10µF

ANALOG

OUTPUT

0.1µF

– 5V

NOTES:

1. Pin numbers in ( ) are for CLCC package.

2. For SOIC package:

Pins 2, 4, 6, 7 DO NOT CONNECT

3. For CLCC package:

Pins 1, 3, 5, 16, 20 NOT CONNECTED

Pins 6, 8, 9 DO NOT CONNECT

R Load

+

100Ω

0.1µF

+5V

Figure 2. SHM-14 Simplified Connection Diagram

HOLD

-0.8 V

-1.8 V

-0.8 V

SAMPLE

-1.8 V

+1 V

ANALOG

INPUT

-1 V

+1 V

ANALOG

OUTPUT

-1 V

SAMPLE

HOLD

SAMPLE

HOLD

Acquisition

Time to

±0.024%

20ns typ.

7ns typ.

Track-to-hold Settling

to ±0.024%

Feedthrough -80dB

Figure 3. SHM-14 Control and Timing

3

7ns typ.

20ns typ.

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