D/A Converter Series for Electronic Adjustments
Standard 8bit
8ch Type D/A Converters
No.09052EBT05
BH2226FV,BH2226F
●Description
The BH2226FV,BH2226F is an 8bit R-2R-type D/A converter with 8 channels. The D/A converter output and
serial / parallel conversion function can be switched with one command, and a built-in RESET function
ensures that the output voltage at all channels is Low during power up. A broad power supply voltage
range (2.7V-5.5V) is available, providing design flexibility.
●Features
1) Integrated expansion port function
2) Built-in RESET function
3) High speed output response characteristics
4) 3-line-type serial interface
5) Broad power supply voltage range: 2.7V-5.5V
●Applications
DVCs, DSCs, DVDs, CD-Rs, CD-RWs
●Line up matrix
Parameter
Power source voltage range
Number of channels
Current consumption
Differential non linearity error
Integral non linearity error
Output current performance
Settling time
Data transfer frequency
Input format
Data latch method
Package
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© 2009 ROHM Co., Ltd. All rights reserved.
BH2226FV
2.7~5.5V
8ch
1.3 mA
±1.0LSB
±1.5LSB
±1.0mA
100µs
10MHz
CMOS
CSB method
SSOP-B16
1/9
BH2226F
2.7~5.5V
8ch
1.3 mA
±1.0LSB
±1.5LSB
±1.0mA
100µs
10MHz
CMOS
CSB method
SOP16
2009.07 - Rev.B
Technical Note
BH2226FV,BH2226F
●Absolute Maximum Ratings
Parameter
(Ta=25℃)
Remarks
Symbol
Limits
Unit
Power source voltage
VCC
-0.3~7.0
V
-
Terminal voltage
VIN
-0.3~VCC
V
-
TSTG
-55~125
Storage temperature range
Power dissipation
PD
℃
-
450
*1
mW
BH2226FV
500*2
mW
BH2226F
*1 Derated at 4.5mW/ ℃ at Ta>25℃
*2 Derated at 5.0mW/ ℃ at Ta>25℃
*3 Please note that this product is not robust against radiation.
●Recommended Operating Conditions
(Ta=25℃)
Parameter
VCC power source voltage
Terminal input voltage range
Analog output current
Operating temperature range
Serial clock frequency
D/A output limit load capacity
Symbol
VCC
VIN
IO
TOPR
FCLK
CL
MIN.
2.7
0
-1.0
-20
-
Limits
TYP.
1.0
-
●Electrical Characteristics
(Unless otherwise specified, VCC=3.0V, RL=OPEN, CL=0pF, Ta=25℃)
Limits
Parameter
Symbol
MIN.
TYP.
<Current consumption>
ICC
1.1
VCC system
ICCPD
5
<Logic interface>
L input voltage
VIL
GND
H input voltage
VIH
2.4
Input current
IIN
-10
L output voltage
VOL
H output voltage
VOH
VCC-0.4
<Buffer amplifier>
ZS1
GND
Output zero scale voltage
ZS3
GND
FS1
VCC-0.1
Output full scale voltage
FS3
VCC-0.3
<D/A converter precision>
Differential non linearity error
DNL
-1.0
Integral non linearity error
INL
-1.5
VCC power source voltage rise
trVCC
100
time
Power on reset release voltage
VPOR
1.9
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2/9
Unit
Remarks
V
V
mA
℃
MHz
µF
-
Unit
Conditions
2.5
20
mA
µA
CLK=1MHz, 80H setting
At power down setting
0.6
VCC
10
0.4
-
V
V
µA
V
V
VCC=5V
VCC=5V
0.1
0.3
VCC
VCC
V
V
V
V
00H setting, at no load
00H setting, IOH=1.0mA
FFH setting, at no load
FFH setting, IOL=1.0mA
1.0
1.5
LSB
LSB
-
µs
-
V
MAX.
5.5
VCC
1.0
85
10.0
0.1
MAX.
IOH=2.5mA
IOL=0.4mA
Input code 02H~FDH
Input code 02H~FDH
VCC=0→2.7V
2009.07 - Rev.B
Technical Note
BH2226FV,BH2226F
●Timing Chart
（Unless otherwise specified, VCC=3.0V, RL=OPEN, CL=0pF, Ta=25℃）
Limits
Parameter
Symbol
MIN.
TYP.
MAX.
CLK L level time
tCLKL
50
CLK H level time
tCLKH
50
DI setup time
tsDI
20
DI hold time
thDI
40
Parallel input setup time
tsPI
20
Parallel input hold time
thPI
40
CSB setup time
tsCSB
50
CSB hold time
thCSB
50
CSB H level time
tCSBH
50
D/A output settling time
tOUT
100
Parallel output delay time
tpOUT
600
Serial output delay time
tsOUT
350
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
ns
ns
Conditions
CL=50pF,RL=10kΩ
CL=50pF,RL=10kΩ
CL=50pF,RL=10kΩ
Fig.1
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3/9
2009.07 - Rev.B
Technical Note
BH2226FV,BH2226F
●Terminal Description / Block Diagrams
(BH2226FV,BH2226F)
Terminal
No.
Function
name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
DA1
DA2
DA3
DA4
DA5
DA6
DA7
DA8
VCC
RESETB
TEST
CSB
CLK
DI
SO
GND
1
16
15
2
Serial
3
Analog output terminal /
I/O input output terminal
14
Interface
4
13
5
Power source terminal
Reset terminal
Test terminal (normal connected to GND)
Chip select signal input terminal
Serial clock input terminal
Serial data input terminal
Serial data output terminal
Ground terminal
PowerOn
Reset
6
12
11
7
10
8
9
Fig.2
●Input-Output equivalence circuits
Terminal
DA1
DA2
DA3
DA4
DA5
DA6
DA7
DA8
Equivalence Circuit
Terminal
DI
CLK
CSB
TEST
RESETB
Equivalence Circuit
SO
Fig.3 Input-Output equivalence circuits
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4/9
2009.07 - Rev.B
Technical Note
BH2226FV,BH2226F
●Operation Description
・Command Transmission
The Control command consists of 3 lines of 12bit serial input data (MSB first).
DI data is read at the rising edge of the CLK, and becomes valid in the CSB Low area (before the CSB rise for 12bit data).
CSB
12
11
10
9
8
7
6
5
4
3
2
1
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
CLK
X
DI
X
Fig.4
Data Settings
D0
0
1
0
1
0
D1
0
0
1
1
0
D2
0
0
0
0
1
D3
0
0
0
0
0
D4
0
0
0
0
0
D5
0
0
0
0
0
D6
0
0
0
0
0
D7
0
0
0
0
0
1
1
1
1
1
1
1
1
~
0
1
(Note)
1
1
1
1
1
1
Setting
At D/A setting：GND
At D/A setting：(VCC-GND)/256x1
At D/A setting：(VCC-GND)/256 x 2
At D/A setting：(VCC-GND)/256 x 3
At D/A setting：(VCC-GND)/256 x 4
~
At D/A setting：(VCC-GND)/256 x 254
At D/A setting：(VCC-GND)/256 x 255
Default D[7:0]=00h
Channel Settings
D8
D9
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
D10
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
D11
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Setting
Power down setting (default)
DA1
DA2
DA3
DA4
DA5
DA6
DA7
DA8
Power down release
Inconsequential
Inconsequential
I/O D/A select
I/O serial⇒Parallel
I/O parallel⇒Serial
I/O status setting
Input / Output D/A Selection settings ：Each channel can be set for either I/O port or D/A converter output.
0: I/O mode (When I/O mode is selected, set the status as well.)
1: D/A mode (Set the I/O status to output mode.)
D0
D1
D2
D3
D4
D5
D6
D7
Description
Corresponding terminals for I/O or
DA1
DA2
DA3
DA4
DA5
DA6
DA7
DA8
D/A selection
I/O Status Setting : Set the status of the I/O input output terminal by D0 ~ D7.
0: input mode (High-Z status)
1: output mode
D0
D1
D2
D3
D4
D5
D6
D7
DA1
DA2
DA3
DA4
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DA5
DA6
DA7
5/9
DA8
Description
Corresponding terminals for status
setting
2009.07 - Rev.B
Technical Note
BH2226FV,BH2226F
・Command Transmission Procedures
Carry out the following after power on and just after external reset:
(1) Power Down Release (2) I/O D/A Select (3) I/O Status Set
Arbitrary setting
Power down release
I/O DAC select
I/O status setting
Fig.5
Note: When power is started, the power on reset is activated and the internal register initialized. However, as shown in the
figure above, in area (a), if CSB cannot be made High and noise is introduced in the control line an error may occur when
setting during the rising CSB signal.
In such a case, set the external RESETB terminal to Low and reset when CSB = High.
・Parallel - Serial Conversion
Parallel data {DA[8:1]} is taken in at the first CSB falling edge after setting the parallel serial command.
The data is then outputted in synch with the falling edge of the CLK in the next CSB = Low area, and output from 4CLK.
However, please note that the SCLK falling edge that occurs from CSB fall to the first SCLK rising edge is not counted.
Parallel data taking in
PS conversion command
Fig.6
・Serial - Parallel Conversion
DI serial data is taken in at the rising edge of the CLK.
The data is then output from the DA[8:1] terminal just after the CSB rising edge.
During that time the SO terminal output becomes undetermined (just previous address setting + data output).
Parallel data output
Fig.7
・D/A Converter Output Setting (Fig. 7)
DI serial data is taken in at the rising edge of the clock.
The D/A converter output is output from the DA[8:1] terminal just after the rising edge of the CSB.
During that time, the SO terminal output becomes undetermined (just previous address setting + data output).
DAC output
DA1 output
Fig.8
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6/9
2009.07 - Rev.B
Technical Note
BH2226FV,BH2226F
●Electrical Characteristics Curves
16.0
1.6
1.4
1.2
85℃
1.0
25℃
0.8
-20℃
0.6
0.4
0.2
3.0
14.0
OUTPUT VOLTAGE:Vo[V]
1.8
CIRCUIT CURRENT:ICCPD[uA]
CIRCUIT CURRENT:ICC[mA]
2.0
12.0
10.0
8.0
85℃
6.0
25℃
4.0
-20℃
2.0
0.0
1
2
3
4
5
6
0
SUPPLY VOLTAGE:VCC[V]
1
2
3
4
5
64
128
192
256
INPUT CODE:[dec]
Fig.11 Output voltage
characteristic
0.25
0.8
VCC=3.0V
0.6
0.20
0.1
0.0
-0.1
DNL [LSB]
0.4
INL [LSB]
DNL [LSB]
0.5
0
1.0
VCC=3.0V
0.2
0.2
0.0
-0.2
0.15
0.10
-0.4
-0.2
0.05
-0.6
-0.3
-0.8
-0.4
0.00
-1.0
64
128
192
256
0
64
INPUT CODE [dec]
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
2.0
3.0
4.0
0.0
256
5.0
80.0
IL=1.0mA
70.0
60.0
50.0
85℃
40.0
25℃
30.0
-20℃
20.0
10.0
0.0
0.0
6.0
1.0
2.0
3.0
4.0
Fig.15 Power source voltage
vs. integral non linearity error
5.0
1.50
1.00
0.50
0.00
-25
0
25
50
75
100
TEMPARATURE:Ta[℃]
Fig.18 Reset release voltage
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6.0
IL=1.0mA
-40
-60
-80
-20℃
-100
25℃
-120
85℃
-140
1.0
2.0
3.0
4.0
5.0
6.0
Fig.17 Output full scale
voltage
3.0
80
-20℃
60
25℃
85℃
40
20
0
-50
5.0
SUPPLY VOLTAGE:VCC[V]
INPUT VOLTAGE:VIL,VIH[V]
SETTLING TIME:tOUT[us]
2.00
4.0
0
0.0
100
2.50
3.0
-20
6.0
Fig.16 Output zero scale
voltage
3.00
2.0
Fig.14 Power source voltage
vs. differential non linearity
error
SUPPLY VOLTAGE:VCC[V]
SUPPLY VOLTAGE:VCC[V]
1.0
SUPPLY VOLTAGE:VCC[V]
Fig.13 Integral non linearity
error
ZERO SCALE VOLTAGE:ZS[mV]
0.45
1.0
192
INPUT CODE [dec]
Fig.12 Differential non linearity
error
0.0
128
FULL SCALE VOLTAGE:FS[mV]
0
INL [LSB]
1.0
6
Fig.10 Consumption current at
power down
0.4
RESET VOLTAGE:VPOR[V]
1.5
SUPPLY VOLTAGE:VCC[V]
Fig.9 Action current
consumption
0.3
2.0
0.0
0.0
0
VCC=3.0V
2.5
2.5
2.0
1.5
VIH
1.0
VIL
0.5
0.0
0.0
1.0
2.0
3.0
4.0
5.0
SUPPLY VOLTAGE:VCC[V]
Fig.19 Settling time
7/9
6.0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
SUPPLY VOLTAGE:VCC[V]
Fig.20 Input voltage
2009.07 - Rev.B
Technical Note
BH2226FV,BH2226F
●Operation Notes
(1) Numbers and data in entries are representative design values and are not guaranteed values of the items.
(2) Although we are confident in recommending the sample application circuits, carefully check their characteristics further
when using them. When modifying externally attached component constants before use, determine them so that they
have sufficient margins by taking into account variations in externally attached components and the Rohm LSI, not only
for static characteristics but also including transient characteristics.
(3) Absolute Maximum Ratings
Operating or testing the device over the maximum specifications may damage the part itself as well as peripheral
components. Therefore, please ensure that the specifications are not exceeded.
(4) GND potential
Ensure that the GND terminal is at the lowest potential under all operating conditions.
(5) Thermal design
Use a thermal design that allows for a sufficient margin regarding power dissipation (Pd) under actual operating conditions.
(6) Terminal shorts and mis-mounting
Incorrect orientation or misalignment of the IC when mounting to the PCB may damage part. Short-circuits caused by
the introduction of foreign matter between the output terminals or across the output and power supply or GND may also
result in destruction.
(7) Operation in a strong magnetic field
Operation in a strong electromagnetic field may cause malfunction.
(8) Reset Function
The power on reset circuit, which initializes internal settings, may malfunction during abrupt power ons. Therefore, set
the time constant so as to satisfy the power source rise time.
(9) After power on and after the external reset is in power down status, DA1 ~ DA8 will be in input mode (all terminals at
High-Z).
(10) In the case of condition changes in the DA1 ~ DA8 terminals (i.e. changes from D/A mode to serial-parallel mode, from
serial-parallel mode to parallel-serial mode, excluding D/A data and I/O data updates), change both analog and digital
settings of High-Z.
(11) Connect the RESETB terminal to VCC and set it to High, making sure that it becomes Low only at reset.
(12) Initialization of the serial interface shift register is carried out only by power on reset, or external reset, and is not reset
by CSB = High. Therefore, when a specified clock number (12CLK) is not attained during command setting,
interrupting processing, transfer regular data once again.
(13) The power down function restricts the consumption current in the internal analog circuit. Set it by command. At power
down, for channels set to D/A mode, "I/O D/A selection" is changed from "D/A mode" to "I/O mode". Therefore, when
the "I/O status setting" of the channel is in input mode, the terminal is in High-Z status and the input becomes unstable
and unnecessary current flows. Set the I/O status setting of channel to be in output mode, or set the terminal using
resistance.
(14) When shifting from PIO use status to D/A use status, a wait time in order to ensure D/A output stability is necessary.
Therefore wait for a maximum of 1ms after the "I/O D/A select" command is input.
If wait time is problematic, set the D/A setting code to 80hex and change it to the specified code setting.
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8/9
2009.07 - Rev.B
Technical Note
BH2226FV,BH2226F
●Ordering part number
B
H
2
Part No.
2
2
6
F
Part No.
V
-
Package
FV: SSOP-B16
F: SOP16
E
2
Packaging and forming specification
E2: Embossed tape and reel
(SSOP-B16/SOP16)
SOP16
<Tape and Reel information>
10 ± 0.2
(MAX 10.35 include BURR)
9
Embossed carrier tape
Quantity
2500pcs
Direction
of feed
E2
The direction is the 1pin of product is at the upper left when you hold
( reel on the left hand and you pull out the tape on the right hand
)
0.3MIN
4.4±0.2
6.2±0.3
16
Tape
1
8
0.11
1.5±0.1
0.15 ± 0.1
1.27
0.4 ± 0.1
0.1
1pin
Reel
(Unit : mm)
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
SSOP-B16
<Tape and Reel information>
5.0±0.2
9
0.3Min.
4.4±0.2
6.4±0.3
16
1
Tape
Embossed carrier tape
Quantity
2500pcs
Direction
of feed
E2
The direction is the 1pin of product is at the upper left when you hold
( reel on the left hand and you pull out the tape on the right hand
)
8
0.10
1.15±0.1
0.15±0.1
0.1
0.65
1pin
0.22±0.1
(Unit : mm)
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Reel
9/9
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
2009.07 - Rev.B
Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specified herein is subject to change for improvement without notice.
The content specified herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specifications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specified herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices).
The Products specified in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller,
fuel-controller or other safety device). ROHM shall bear no responsibility in any way for use of
any of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
If you intend to export or ship overseas any Product or technology specified herein that may
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More detail product informations and catalogs are available, please contact us.
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