BU2508FV ROHM Co. Ltd., BU2508FV Datasheet - Page 3

• Manufacturer Part Number: BU2508FV
• Description: 10bit 4channels , D/a Converter With Output Buffer
• Manufacturer: ROHM Co. Ltd.

●Timing Characteristics (Unless otherwise specified, VCC＝5V, VrefH＝5V, VrefL＝0V, Ta＝25℃）
●DAC Variable Output Range Function
DA出力
RESET
With the variable output range function, the upper / lower limits of the output voltage as well as the power supply
voltage can be set.
The upper limit value setting terminal VrefH is used as the power supply terminal, while the lower limit value setting
terminal VrefL is used as the GND terminal (1LSB ≒ 5mV). In the example below, VrefH = 3.5V / VrefL = 1.5V.
Further adjustments can be made in order to achieve greater accuracy (1LSB ≒ 2mV).
VOUT
Reset L pulse width
Clock L pulse width
Clock H pulse width
Clock rise time
Clock fall time
Data setup time
Data hold time
Load setup time
Load hold time
Load H pulse width
DA output settling time
CLK
LD
DI
output
5V
0V
Parameter
t
RTL
1LSB≒5.0mV
1024
ステップ
step
step
3FFh
Symbol
tDCH
tCHD
tCKH
tCHL
tLDC
tLDH
tLDD
tRTL
tCKL
tcr
tcf
Input Code
t
CKL
VOUT
t
DCH
t
3.5V
1.5V
cr
5V
0V
MIN.
50
50
50
20
40
50
50
50
-
-
t
CHD
t
CKH
Limits
TYP.
7
-
-
-
-
-
-
-
-
-
t
CHL
3/8
t
MAX.
cf
1LSB≒2.0mV
50
20
-
-
-
-
-
-
-
-
1024
ステップ
step
3FFh
Unit
nS
μS
t
LDH
Input Code
t
LDD
VrefH
VrefL
Judgment level is 80% / 20% of VCC.
CL≦1000pF, VO:0.5V⇔4.5V .
Until output becomes the final value 1/2LSB
t
LDC
Conditions