Rainbow Electronics MAX5190 User 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