Texas Instruments XTR300EVM, User Manual, Page: 6 / 19

GAIN IN IN REF
OUT
SET OS
R V V V
V
2 R R
æ ö
-
= +
ç ÷
è ø
Basic EVM Configuration
www.ti.com
Figure 3. XTR300EVM Single-Ended Voltage Output Configuration Screenshot
3.1.2 Bidirectional Output
The second voltage-mode configuration creates a bidirectional output from a single-ended input. The
jumper settings for this configuration are listed in
Table 5 . Connect your load to TB4 between OUT+ and
OUT–. Connect ±15 V to V+ and V–. Apply a 5-V signal to V
IN
. Connect a 5-V reference voltage to V
REF
. If
an external reference voltage is not required, a shunt can be placed on J7 to apply an onboard reference
voltage of 5 V. In this configuration, the voltage across TB4 is 10 V. If you apply a 0-V signal to V
IN
, the
voltage across TB4 is approximately –10 V. The voltage output is calculated by the transfer function in
Equation 2 :
(2)
The default EVM configuration sets R
GAIN
to 10 k Ω , R
SET
to 2.5 k Ω , and R
OS
to 2.5 k Ω .
Table 5. Bidirectional Voltage Output Jumper Settings
Jumper Function
J1 On
J2 On
J3 Off
J4 Off
J5 On
J6 On
J7 On
(1)
(1)
J7 should be off if an external reference is used and on if the internal
reference is to be used.
6 XTR300EVM SBOU034A – February 2006 – Revised February 2013
Submit Documentation Feedback
Copyright © 2006–2013, Texas Instruments Incorporated