MAX5661EVCMAXQU+ Maxim Integrated Products, MAX5661EVCMAXQU+ Datasheet - Page 27

• Manufacturer Part Number: MAX5661EVCMAXQU+
• Description: EVALUATION SYSTEM FOR MAX56611
• Manufacturer: Maxim Integrated Products

Specifications of MAX5661EVCMAXQU+

• Number Of Dac's: 1
• Number Of Bits: 16
• Outputs And Type: 2, Single Ended
• Data Interface: Serial
• Dac Type: Current/Voltage
• Voltage Supply Source: Single
• Operating Temperature: -40°C ~ 105°C
• Utilized Ic / Part: MAX5661
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Connect an external voltage reference in the +4V to
+4.2V range through a 1kΩ series resistor to
the buffered REF input. Use a high-accuracy, low-
noise +4.096V voltage reference such as the
MAX6126AASA41 (3ppm/°C temperature drift and
0.02% initial accuracy) for best 16-bit static accuracy.
REF does not accept AC signals. See Table 17 for a list-
ing of +4.096V references.
The MAX5661 features an active-low load DAC (LDAC)
logic input that allows asynchronous updates to the
DAC outputs. Drive LDAC high to V
operation while controlling the MAX5661 using only the
serial interface. Drive LDAC low to update the DAC out-
put with the input register data. Hold LDAC low to make
the input register transparent and immediately update
the DAC output with the input register data. Figure 8
shows the LDAC timing with respect to OUT_.
Figure 7. Functional Diagram
Outputs for Industrial Analog Output Modules
SCLK
DOUT
DIN
CS
Single 16-Bit DAC with Current and Voltage
REGISTER
MAX5661
SHIFT
______________________________________________________________________________________
CONTROL
REGISTER
REGISTER
REGISTER
Reference Input
CLEAR
INPUT
CC
LDAC Input
during normal
LDAC
REGISTER
DAC
SOFTWARE
LOAD DAC
Figure 8. LDAC Timing
LDAC
OUT_
2-TO-1
FULL-SCALE
MUX
REGISTER
ADJUST
DAC
t
LDL
t
DELAY
OUTPUT ADJUST
FULL-SCALE
TO OUTPUT
CIRCUITRY
OUTI
OUTV
± 2 LSB
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