SHA1144 Intronics, Inc., SHA1144 Datasheet

SHA1144

Manufacturer Part Number

SHA1144

Description

High Resolution 14-Bit Sample And Hold Amplifier

Manufacturer

Intronics, Inc.

Datasheet

1.SHA1144.pdf (1 pages)

Current page: 1 of 1
Download datasheet (56Kb)

shed by Intronics is believed to be accurate and reliable. However, no responsibility is

GENERAL DESCRIPTION

The SHA1144 is a fast sample-hold amplifier module with accuracy

and dynamic performance appropriate for applications with fast 14-bit

A/D converters. In the "sample" mode, it acts as a fast amplifier,

tracking the input signal. When switched to the "hold" mode, the

output is held at a level corresponding to the input signal voltage at the

instant of switching. The droop rate in "hold" is appropriate to allow

accurate conversion by 14-bit A/D converters having conversion times

of up to 150 s.

DYNAMIC PERFORMANCE

The SHA1144 was designed to be compatible with fast 14-bit A/D

converters such as the ADC1130 and ADC1131 series, which convert

14 bits in 25 s and 12 s, respectively. Maximum acquisition time of

8 S for the SHA1144 permits high sampling rates for 14-bit

conversions. The SHA1144 is guaranteed to have a maximum gain

nonlinearity of ±0.001% of full scale to insure ½ LSB accuracy in 14-

bit systems. When in the "hold" mode, the droop rate is 1 V/ S, so the

SHA1144 will hold an input signal to +0.003% of full scale (20V p-p)

for over 600 S.

PRINCIPLE OF OPERATION

The SHA1144 consists basically of two high speed operational

amplifiers, a storage capacitor, and a digitally controlled switch. It

differs from typical sample-and-hold modules in one important respect;

application versatility. The user completes the SHA1144 feedback

circuit external to the module. Therefore, the module may be used in

inverting or noninverting configurations and can easily be arranged to

provide circuit gain of more than unity to simplify signal conditioning

in a subsystem.

assumed by Intronics for its use; nor for any infringements of patents or other rights of

third parties which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Intronics.

FEATURES

±10V min Input/Output Range

50ns Aperture Delay

0.5ns Aperture Jitter

6 s Settling Time

±0.001% Max Gain Linearity Error

Complete with Input Buffer

APPLICATIONS

Track and Hold

Peak Measurement Systems

Data Acquisition Systems

Simultaneous Sample-and-Hold

FEEDBACK CONNECTIONS

A block diagram of the SHA1144 is shown in Figure 1. The input

section acts as a voltage-to-current converter, providing the current

needed to charge the "hold" capacitor. The output amplifier isolates

the "hold" capacitor and provides low output impedance for driving

the load. Since feedback is not hardwired in the module, both inverting

and noninverting input terminals are available, and the SHA1144 can

be connected as a follower with unity gain or potentiometric gain, as

well as inverter or even a differential amplifier. Since the unity gain

follower mode will be the most frequent application, performance data

listed in the specification table is based on this operating mode.

Sample and Hold Amplifier

High Resolution 14-Bit

Figure 1. Block Diagram – SH1144

1400 Providence Highway, Building #2

Norwood, MA 02062

Phone (781) 551-5500

FAX (781) 551-5555

www.intronicspower.com

SHA1144

Related parts for SHA1144

Related keywords

SHA1144 datasheet
SHA1144 data sheet
SHA1144 pdf datasheet
SHA1144 component
SHA1144 part
SHA1144 distributor
SHA1144 RoHS
SHA1144 datasheet download