Rainbow Electronics MAX5190 - Manual (Page 9)

MAX5187/MAX5190
8-Bit, 40MHz, Current/Voltage-Output DACs
_______________________________________________________________________________________ 9
9.6k Ω*
I FS
0.1 µF 10 µF
DV DD
R SET
I REF
REFR
AV DD
REFO
+1.21V
BANDGAP
REFERENCE
REN
CURRENT-
SOURCE ARRAY
EXTERNAL
+1.21V
REFERENCE
*9.6k Ω REFERENCE CURRENT SET RESISTOR
INTERNAL TO MAX5190 ONLY. USE EXTERNAL
R
SET FOR MAX5188.
MAX5187
MAX5190
MAX6520
DGND
AGND
AGND
Figure 3. MAX5187/MAX5190 with External Reference
R SET **
9.6k Ω
I FS
R
SET
C COMP *
REFR
I REF
REFO
MAX4040
+1.2V
BANDGAP
REFERENCE
CURRENT-
SOURCE ARRAY
*COMPENSATION CAPACITOR (C COMP = 100nF) **9.6k Ω REFERENCE CURRENT SET RESISTOR
INTERNAL TO MAX5190 ONLY. USE EXTERNAL
R
SET FOR MAX5188.
OPTIONAL EXTERNAL BUFFER
FOR HEAVIER LOADS
REN
MAX5187
MAX5190
I REF =
V
REF
R SET
AGND
AGND
DGND
Figure 2. Setting I
FS
with the Internal +1.2V Reference and the Control Amplifier