Datasheet

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I
OUT



2.5 V  0.5 V
125 



N
65, 536




0.5 V
125 

(3)
DAC7634
SBAS134B – JULY 2004 – REVISED DECEMBER 2005
Table 3. Timing Specifications (T
A
= –40°C to 85°C)
SYMBOL DESCRIPTION MIN UNITS
t
DS
Data Valid to CLK Rising 10 ns
t
DH
Data Held Valid after CLK Rises 20 ns
t
CH
CLK HIGH 25 ns
t
CL
CLK LOW 25 ns
t
CSS
CS LOW to CLK Rising 15 ns
t
CSH
CLK HIGH to CS Rising 0 ns
t
LD1
LOAD HIGH to CLK Rising 10 ns
t
LD2
CLK Rising to LOAD LOW 30 ns
t
LDRW
LOAD LOW Time 30 ns
t
LDDL
LDAC LOW Time 100 ns
t
LDDH
LDAC HIGH Time 150 ns
t
LDDD
LDAC Rising from LOAD LOW 40 ns
t
RSSS
RESETSEL Valid to RESET HIGH 0 ns
t
RSSH
RESET HIGH to RESETSEL Not Valid 100 ns
t
RSTL
RESET LOW Time 10 ns
t
RSTH
RESET HIGH Time 10 ns
t
S
Settling Time 10 µs
Figure 65 shows a DAC7634 in a 4-mA to 20-mA current output configuration. The output current can be
determined by Equation 3 :
At full-scale, the output current is 16 mA, plus the 4 mA, for the zero current. At zero scale, the output current is
the offset current of 4 mA (0.5 V/125 Ω ).
25