BH2226F ROHM [Rohm], BH2226F Datasheet - Page 8

• Manufacturer Part Number: BH2226F
• Description: Standard 8bit 8ch Type D/A Converters
• Manufacturer: ROHM [Rohm]

●Operation Notes
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BH2226FV,BH2226F
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(10) In the case of condition changes in the DA1 ~ DA8 terminals (i.e. changes from D/A mode to serial-parallel mode, from
(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
(13) The power down function restricts the consumption current in the internal analog circuit. Set it by command. At power
(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.
(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
(3) Absolute Maximum Ratings
(4) GND potential
(5) Thermal design
(6) Terminal shorts and mis-mounting
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
(8) Reset Function
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
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.
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.
Ensure that the GND terminal is at the lowest potential under all operating conditions.
Incorrect orientation or misalignment of the IC when mounting to the PCB may damage part. Short-circuits caused by
Operation in a strong electromagnetic field may cause malfunction.
The power on reset circuit, which initializes internal settings, may malfunction during abrupt power ons. Therefore, set
High-Z).
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.
by CSB = High. Therefore, when a specified clock number (12CLK) is not attained during command setting,
interrupting processing, transfer regular data once again.
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.
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.
Use a thermal design that allows for a sufficient margin regarding power dissipation (Pd) under actual operating conditions.
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Technical Note
2009.07 - Rev.B