鈥?/div>
THA for Differential ADCs
RF Demodulation Systems
Test Instrumentation
Digital Sampling Oscilloscopes
GENERAL DESCRIPTION
The SPT9110 is a single-to-differential track-and-hold ampli-
fier. It can be operated as a single-end THA only or, in full
configuration, as a single-to-differential THA. An internal
reference provides the common-mode voltage for the single-
to-differential output stage. The THA, inverter and reference
have separate power supply pins so each can be optionally
powered up and used.
This device provides an analog designer with a low cost
single-to-differential THA amplifier for interfacing differential
and single-ended ADCs.
The SPT9110 is offered in a 28-lead SOIC package in the
industrial temperature range.
BLOCK DIAGRAM
AVCC
(THA)
Out+
AVCC
(INV)
Analog In
(VIN)
1X
1X
Invert InA
CH
OLD
1 k鈩?/div>
R1
1 k鈩?/div>
R2
-
Out-
+
Invert InB
+2.5 V
Reference
CLK NCLK
AVCC
(Ref)
Ref
Out
Ref
In
AGND
Signal Processing Technologies, Inc.
4755 Forge Road, Colorado Springs, Colorado 80907, USA
Phone: (719) 528-2300 FAX: (719) 528-2370
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