Linear Technology DC1925A Series Demo Manual page 8

DC1925A JUMPERS
Definitions
JP1 – EEPROM is for factory use only. Leave this in the
default WP position.
JP2 – V+ Selects 8V or 5V for V+. The default is position
is 8V. Setting V+ to 5V is useful for evaluating single 5V
supply operation of the buffer when operating the ADC
with Digital Gain Compression turned on.
JP3 – VCCIO sets the output levels at P1 to either 3.3V
or 2.5V. Use 2.5V to interface to the DC890 which is the
default setting. Use 3.3V to interface to the DC590.
JP4 – VCM sets the DC bias for AIN+ and AIN– if the single
ended to differential mode is enabled, and the inputs are
AC coupled. V /2 is the default setting.
REF
DEMO MANUAL DC1925A
JP5 – V– Selects –3.6V or ground for V–. The default set-
ting is –3.6V. Setting V– to ground is useful for evaluating
single supply operation of the buffer when operating the
ADC with Digital Gain Compression turned on.
JP6 – FS selects whether the Digital Gain Compression is
on or off. In the VREF position, Digital Gain Compression
is off and the analog input range at A
V . In the 0.8VREF position, Digital Gain Compression is
REF
turned on and the analog input range at A
0.1V to 0.9V . The default setting is off.
REF REF
JP7 – Coupling selects AC or DC coupling of A
default setting is DC.
JP8 – Coupling selects AC or DC coupling of A
default setting is DC.
+ and A – is 0V to
IN IN
+ and A – is
IN IN
+. The
IN
–. The
IN
dc1925af
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