参数资料
| 型号： | AD5383BSTZ-5 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 24/40页 |
| 文件大小： | 0K |
| 描述： | IC DAC 12BIT 32CH 5V 100-LQFP |
| 产品培训模块： | Data Converter Fundamentals DAC Architectures |
| 产品变化通告： | AD5381,3 Redesign Change 24/Oct/2011 |
| 设计资源： | 32 Channels of Programmable Voltage with Excellent Temperature Drift Performance Using AD5383 (CN0014) AD5383 Channel Monitor Function (CN0015) |
| 标准包装： | 1 |
| 设置时间： | 6µs |
| 位数： | 12 |
| 数据接口： | 串行，并联 |
| 转换器数目： | 32 |
| 电压电源： | 单电源 |
| 功率耗散（最大）： | 65mW |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 100-LQFP |
| 供应商设备封装： | 100-LQFP（14x14） |
| 包装： | 托盘 |
| 输出数目和类型： | 32 电压，单极；32 电压，双极 |
| 采样率（每秒）： | 167k |
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AD5383
Data Sheet
Rev. C | Page 30 of 40
2-Byte Mode
Following initialization of 2-byte mode, the user can
sequentially update channels. The device address byte is only
required once, and the address pointer is configured for auto-
increment or burst mode.
The user must begin with an address byte (R/W = 0), after
which the DAC acknowledges that it is prepared to receive data
by pulling SDA low. The address byte is followed by a specific
pointer byte (0xFF) that initiates the burst mode of operation.
The address pointer initializes to Channel 0, the data following
the pointer is loaded to Channel 0, and the address pointer
automatically increments to the next address.
The REG0 and REG1 bits in the data byte determine which
register is updated. In this mode, following the initializa-tion,
only the two data bytes are required to update a channel. The
channel address automatically increments from Address 0 to
Channel 31 and then returns to the normal 3-byte mode of
operation. This mode allows transmission of data to all
channels in one block and reduces the software overhead in
configuring all channels. A STOP condition at any time exits
this mode. Toggle mode is not supported in 2-byte mode.
Figure 33 shows a typical configuration.
PARALLEL INTERFACE
The SER/PAR pin must be tied low to enable the parallel
interface and disable the serial interfaces. Figure 7 shows the
timing diagram for a parallel write. The parallel interface is
controlled by the following pins:
CS Pin
Active low device select pin.
WR Pin
On the rising edge of WR, with CS low, the addresses on
Pin A4 to Pin A0 are latched; data present on the data bus is
loaded into the selected input registers.
REG0, REG1 Pins
The REG0 and REG1 pins determine the destination register
of the data being written to the AD5383. See Table 10.
Pins A4 to A0
Each of the 32 DAC channels can be addressed individually.
Pins DB11 to DB0
The AD5383 accepts a straight 12-bit parallel word on DB11
to DB0, where DB11 is the MSB and DB0 is the LSB.
1
0
1
0
1
AD1
AD0
R/W
A7 = 1
A6 = 1
A5 = 1
A4 = 1
A3 = 1
A2 = 1
A1 = 1
A0 = 1
START COND
BY MASTER
ADDRESS BYTE
POINTER BYTE
MOST SIGNIFICANT DATA BYTE
CHANNEL 0 DATA
LEAST SIGNIFICANT DATA BYTE
ACK BY
CONVERTER
MSB
ACK BY
CONVERTER
ACK BY
AD538x
ACK BY
AD538x
MOST SIGNIFICANT DATA BYTE
CHANNEL 1 DATA
LEAST SIGNIFICANT DATA BYTE
ACK BY
CONVERTER
ACK BY
CONVERTER
MOST SIGNIFICANT DATA BYTE
CHANNEL N DATA FOLLOWED BY STOP
LEAST SIGNIFICANT DATA BYTE
ACK BY
CONVERTER
ACK BY
CONVERTER
STOP
COND
BY
MASTER
REG1
REG0
MSB
LSB
MSB
LSB
REG1
REG0
MSB
LSB
MSB
LSB
REG1
REG0
MSB
LSB
MSB
LSB
SCL
SDA
SCL
SDA
SCL
SDA
SCL
SDA
03734-033
Figure 33. 2-Byte, I2C Write Operation
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