BH2222FV Datasheet, PDF (1/8 Pages) Rohm – 8bit 20ch D/A converter

Standard ICs
8bit 20ch D/A converter
BH2222FV
BH2222FV
BH2222FV is an 8bit D/A converter for electronic adjustment. The 20-channel output voltage can be independently
controlled by three-wire serial interface from micro-controller. The built-in power on reset circuit keeps the output state
Low after the power is on. 4-channel have data register function. Two kinds of set voltage can be retained, and output
voltage can be switched by SEL pin.
!Applications
The voltage adjustment for DVC, DSC etc.
!Features
1) 8bit 20-channel D/A converters adopting R-2R system.
2) 3-wire + 1-wire 16-bit serial interface.
3) POWER ON RESET circuit.
4) The full scale output voltage range : 2.7 ~ 5.5V.
5) It is possible to set the two output full scale level independently.
6) 4-channel date Register extension function.
7) SSOP-B28 package.
!Absolute maximum ratings (Ta=25°C)
Parameter
Symbol
Limits
Unit
Power supply voltage
VCC
−0.3~+7.0
Maximum output voltage
VIN
−0.3~VCC
Storage temperature
Tstg
Power dissipation
Pd
−55~+125
640 ^∗
∗Reduced by 6.4mW for each increase in Ta of 1°C over 25°C.
This product is not designed for protection against radioactive rays.
V
V
°C
mW
!Recommended operating conditions (Ta=25°C)
Parameter
VCC supply voltage
Symbol
VCC
Min.
4.5
VDD1 supply voltage
VDD1
2.7
VDD2 supply voltage
VDD2
2.7
Analog output source current
IOL
−
Analog output sink current
IOH
−
Operating temperature range
Topr
−20
Clock frequency
FSCLK
−
Limit load capacitance
CL
−
Please set to VCC ≥ VDD1, VDD2.
Typ.
−
−
−
−
−
−
1.0
−
Max.
5.5
VCC
VCC
1.0
1.0
85
−
0.47
Unit
V
V
V
mA
mA
°C
MHz
µF
1/7