IC3410 Datasheet, PDF (3/6 Pages) List of Unclassifed Manufacturers – 10-bit digital to analogue converter IC 3410

Performance characteristics
Figure 1 Output current vs. output compliance
voltage
006-109
Figure 4 Reference amplifier frequency
response
Figure 2 Maximum output compliance voltage
vs. temperature
Figure 5 Block diagram
Figure 3 Power supply current vs.
temperature
Circuit description
The 3410 consists of four segment current sources
which generate the 2 Most Significant Bits (MSBs),
and an R/2R DAC implemented with ion implanted
resistors for scaling the remaining 8 Least Signifi-
cant Bits (LSBs). (Figure 6.) This approach
provides complete 10-bit accuracy without trimming.
The individual bit currents are switched ON or OFF
by fully differential current switches. The switches
use current steering for speed.
An on-chip high-slew reference current amplifier
drives the R/2R ladder and segment decoder. The
currents are scaled in such a way that, with all bits
on, the maximum output current is two times
1023/1024 of the reference amplifier current, or
nominally 3.996mA for a 2.000mA reference input
current. The reference amplifier allows the user to
provide a voltage input. Out-board resistor R16
(Figure 7) converts this voltage to a usable
current. A current mirror doubles this reference
current and feeds it to the segment decoder and
resistor ladder. Thus, for a reference voltage of 2.0
volts and a 1kΩ resistor tied to Pin 16, the full scale
3