Rainbow Electronics MAX5189 - 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