Rainbow Electronics MAX5189 User Manual
Page 10
MAX5186/MAX5189
Dual, 8-Bit, 40MHz, Current/Voltage,
Simultaneous-Output DACs
10
______________________________________________________________________________________
R
SET
9.6k
Ω
I
FS
R
SET
C
COMP
*
REFR
I
REF
**
REFO
MAX4040
AGND
AGND
DGND
+1.2V
BANDGAP
REFERENCE
REN
CURRENT-
SOURCE ARRAY
*COMPENSATION CAPACITOR (C
COMP
= 100nF)
**9.6k
Ω REFERENCE CURRENT-SET RESISTOR
INTERNAL TO MAX5189 ONLY. USE EXTERNAL
R
SET
FOR MAX5186.
OPTIONAL EXTERNAL BUFFER
FOR HEAVIER LOADS
MAX5186
MAX5189
I
REF
=
V
REF
R
SET
9.6k
Ω*
I
FS
0.1
µF
10
µF
DV
DD
R
SET
REFR
AV
DD
REFO
+1.2V
BANDGAP
REFERENCE
REN
CURRENT-
SOURCE ARRAY
EXTERNAL
+1.2V
REFERENCE
*9.6k
Ω REFERENCE CURRENT-SET RESISTOR
INTERNAL TO MAX5189 ONLY. USE EXTERNAL
R
SET
FOR MAX5186.
MAX5186
MAX5189
MAX6520
AGND
AGND
DGND
Figure 2. Setting I
FS
with the Internal +1.2V Reference and the Control Amplifier
Figure 3. MAX5186/MAX5189 with External Reference