DAC1136 AD [Analog Devices], DAC1136 Datasheet - Page 4

• Manufacturer Part Number: DAC1136
• Description: HighR esoluti1o6n- a nd1 8-Bit Digital-to-AnaClongv efters
• Manufacturer: AD [Analog Devices]

Characteristic
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TNOTE: All curves tyPical
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Settling Time (Voltage auQuil vs. o/o'of-Full-Scale-Error for
LSB Steps (Essentially lndependent of Amplifier Used). With
Degtitcher I V, the LSB Step at the Maior Carry Settles as
Period.
0.0(X)1
0.001
Fast as the Typical LSB Step, Following the | | W Hold
0.fi)'l
Settling Time (Voltage Output) vs. /o-of'Full-Scale-
0 . 1
0.1
o.1
1ps
Enir for 20V Output Step (+l}v +
Settling Time (Voltage Output) vs. %'of'Full-Scale'
llls
:-...'''."' :.::-"'; _
Error for 10V Ouput Step (0V *
F.S. = Full Scale
..-..-.- - - - ;:
- - ! - - -
10ps
'l0ps
10ps
S E T T L I N G T I M E
S E T T L I N G T I M E
S E T T L I N G T I M E
r - + - :
'i"-t :tt, '':'--
lo0gs
at rated supply voltage.
100Ps
Curves*
1009s
;;^-^-
- , - - i -
l-;:-:--
- t -.-
1ms
lms
lms
-.-" ":;
---
10ms
-l?v)
10ms
-.1
+l?V)
;
1 6
% L S B @ 1 2 B I T S
1 4
1 7
l 5
%LSB @ 18 B|TS
1 4
1 5
1 6
1 7
% L S B @ 1 2 B | T S
% L S B @ 1 8 B r r S
1 3
1 4
1 5
1 6
1 ?
%LSB @ 12 B|TS
%LSB @ r8 B|TS
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The DAC113 611138 may be driven by TTL or CMOS as
INPUT CONSIDERATIONS
shown in Figure 2. Note that the TTL input is shown with
inputs for both a direct
collector (or
OUTPUT CONNECTIONS AND GUARDING
The DAC113 6/1138 output connections for various voltage
ranges are shown in Figure 3.
Since an LSB is only 38pV (at 10 volts full scale for the
DAC1138), care must be exercised to properly guard the
current output of the converter from leakage current. Any
connection made to the DAC's current output (pin 69)
should be guarded. Suggested Printed circuit board guarding
is shown in Figure 3. The optional Card-Mounted Assemblies
of the DACl136lll38 have been carefully designed for
optimum guarding and performance.
2a. TTL Totem Polet
Figure 3. Output Voltage Connections and Suggested PCB
Guarding (Unipolar and Biqolar)
, FoB
2. USE SPST SV{ITCH OR RELAY TO GROUND. WHEN SWITCH IS OPEN, THE
CONVEFTERS HAVE INTERNAL lOKO PULL-UP ON EACH INPUT TO 3.8V.
INTERNAL lOKO WILL PULL INPUT UP TO 3.8V.
"pull-up") configurations.
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G U A R D F O I L
Figure 2. lnput Connections
opEN
l O
DAC CONNECTED FOR OV TO +IOV
""1i..l1"1i"3::.."^. .,...,,
DAC CONNECTED FOR 0V ro +5V
"totem pole" TTL gate and oPen
- - - ' ; a -
D A C C O N N E C T € D F O R I l O V
D A C C O N N E C T E D F O R ! 5 V
O
53
t
s2
O
49
O
2b. Switch or RelaY lnqut"
:
48
O
47 |
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