
BH2227FV, BH2228FV
Technical Note
4/8
www.rohm.com
2011.08 - Rev.B
2011 ROHM Co., Ltd. All rights reserved.
●Terminal Description / Block Diagrams
(BH2227FV)
Terminal Terminal name
Function
1
AO1
Analog output terminal
2
AO2
3
TESTMONI1
Test terminal
(OPEN at normal use)
4
TESTMONI2
5
AO3
Analog output terminal
6
AO4
7
NC
Internally not connected yet
8
NC
9
VDD
Power source terminal
(AO3, 4 full scale voltage
use in common)
10
CSB
Chip select signal input terminal
11
CLK
Serial clock input terminal
12
DI
Serial data input terminal
13
VFS
AO1,2 full scale
Voltage setting terminal
14
VSS
Ground terminal
Fig.2
(BH2228FV)
Terminal Terminal name
Function
1
AO1
Analog output terminal
2
AO2
3
AO3
4
AO4
5
AO5
6
AO6
7
NC
Internally not connected yet
8
NC
9
VDD
Power source terminal
(AO4~6 full scale voltage use
in common)
10
CSB
Chip select signal input terminal
11
CLK
Serial clock input terminal
12
DI
Serial data input terminal
13
VFS
AO1,2,3 full scale
Voltage setting terminal
14
VSS
Ground terminal
Fig.3
●Equivalent Circuits
Terminal
Equivalent circuit
Terminal
Equivalent circuit
AO1
AO2
AO3
AO4
AO5
AO6
DI
CLK
CSB
Fig.4 Equivalent circuit
AO3
AO4
2
AO2
Serial
Interface
VDD
PowerOn
Reset
VDD
R2R
REG
VFS
VDD
1
AO1
5
AO5
6
AO6
7
NC
R2R
REG
VFS
VDD
R2R
REG
VDD
R2R
REG
VDD
14 VSS
13
VFS
12
DI
11
CLK
10 CSB
9
VDD
8
NC
4
VFS
VDD
3
R2R
REG
VFS
VDD
R2R
REG
VDD
VSS
VDD
VSS
VDD
6
TEST
MONI1
TEST
MONI2
2
AO2
Serial
Interface
PowerOn
Reset
R2R
REG
VFS
VDD
1
AO1
5
AO3
AO4
7
NC
R2R
REG
VFS
VDD
R2R
REG
VDD
R2R
REG
VDD
14 VSS
13 VFS
12 DI
11 CLK
10 CSB
9 VDD
8 NC
4
3