LTC2600 Linear Technology, LTC2600 Datasheet - Page 13

• Manufacturer Part Number: LTC2600
• Description: (LTC2600 - LTC2620) 3V/5V Octal 12-bit Rail-to-rail DAC
• Manufacturer: Linear Technology

OPERATIO
The GND pin of the part should be connected to analog
ground. Resistance from the GND pin to system star
ground should be as low as possible. Resistance here will
add directly to the effective DC output impedance of the
device (typically 0.025 ), and will degrade DC crosstalk.
Note that the LTC2600/LTC2610/LTC2620 are no more
susceptible to these effects than other parts of their type;
on the contrary, they allow layout-based performance
improvements to shine rather than limiting attainable
performance with excessive internal resistance.
U
Rail-to-Rail Output Considerations
In any rail-to-rail voltage output device, the output is
limited to voltages within the supply range.
Since the analog outputs of the device cannot go below
ground, they may limit for the lowest codes as shown in
Figure 3b. Similarly, limiting can occur near full scale
when the REF pin is tied to V
full-scale error (FSE) is positive, the output for the highest
codes limits at V
limiting can occur if V
Offset and linearity are defined and tested over the region
of the DAC transfer function where no output limiting can
occur.
LTC2600/LTC2610/LTC2620
CC
as shown in Figure 3c. No full-scale
REF
is less than V
CC
. If V
REF
= V
CC
CC
– FSE.
and the DAC
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