MDSL-0825_15 Datasheet, PDF (5/8 Pages) Analog Devices – Video Speed Current and Boltage Out

MDH SERIES APPLICATIONS
By using external feedback resistor and capacitor as shown
in Figures 15 and 16, other full scale output ranges from 2V
to 10V may be obtained.
DIGITIAL
INPUTS
MSB
BIT 1
I
I
I
I
I
I
I
I
I
I
I
BIT 12
LSB
+1SV
MAVBE
OMITTED
}
MDH
DIA
CONVERTER
.Vo UP TO 10V >6OmA
OUTPUT CURRENT ISEE BELOWI
} soon FS ADJ
30 - ~~DDUTPUT
MSB
fT
DIGITAL
INPUTS
I
llI
I
I
BIT 12
LSB
.USE INVERTER OR
FF aFaR 2'S COMPL.
I' -. ^{1', DIGITAL INPUTS}
..." ,,!
4
'5
i
'7
iillll
~~::
CONVERTER
12
i3
i4
is
ii
20011
OFFSET ADJ
29 _OFFSET
24 +INPUT
-16V +1SV
OBSOLETE -16V +16V
NOTES'
1. VALUE OF C IS APPROXIMATE. A FIXED
CAPACITOR WITH TOLERANCE OF >1pF MAV
BE USED IF 601< DEGRADATION OF SETTLING
TIME IS PERMITTED IF SETTLING TIME IS
TO BE OPTIMIZED,AN ADJUSTABLE CAPACI-
TOR SHOULD BE USED FOR C AND ADJUSTED
FOR MINIMUM SETTLING TIME.
2. OFFSET NULLING MAV BE ACCOMPLISHED BV
CONNECTING A 1Ok POTENTIOMETER BETWEEN
+16V AND -16V, AND CONNECTING ITS ADJUST-
ABLE T;.p TO A 1Ok RESISTOR. THE OTHER END
OF THE RESISTOR IS CONNECTED TO PIN 2B.
TVPICAL UNCOMPENSATED
FULL SCALE.
OFFSET IS '" OF
VOLTAGE
OUTPUT
0 to +2V
0 to +5V
Oto+lOV
SETTLING
TIME
70ns
lOOns
200ns
OFFSET
TEMPCO
lOOV/C
250vfc
500V!'C
RC
2k _10pF
8k _2pF
18k _0.5pF
Figure 15. Binary Coding Unipolar Output Configuration
NOTES'
1. Tho 200n POTENTIOMETER IS ADJUSTED
FOR AN CUTPUT OF -FS WITH ALL ZEROES
IN THE DIGITAL INPUT.
2. THE soon POTENTIOMETER IS ADJUSTED
FOR AN OUTPUT OF +F5-1LSB WITH ALL
ONE'S IN THE DIGITAL INPUT.
3. FOR TWO'S COMPLEMENT 12SC! OPERATION,
AN EXTERNAL INVERTER MUST BE USED TO
COMPLEMENT BIT 1IMSBI-
4. AN ADJUSTABLE CAPACITOR MAV BE USED
FOR C AND ADJUSTED TO OPTIMIZE SET-
TLING TIME.
VOLTAGE
OUTPUT
:tlV
:t2V
:t5V
:tlOV
SETTLING
TIME
70ns
lOOns
lOOns
200ns
OFFSET
TEMPCO
100V fc
200V /C
250vfc
500vfc
RL
C
R
383
lOpF ^2k
383 _2pF 6k
9.1k _2pF 8k
9.1k _0.5pF 18k
Figure 16. Offset Binary Coding or 2'$ Comp Coding
Bipolar Output Configuration
19B5 DIA CONVERTERS
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