- 您现在的位置：买卖IC网 > PDF目录1995 > DS4412U+ (Maxim Integrated Products)IC DAC DUAL CH I2C ADJ 8-USOP PDF资料下载
参数资料
| 型号： | DS4412U+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/10页 |
| 文件大小： | 0K |
| 描述： | IC DAC DUAL CH I2C ADJ 8-USOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 位数： | 4 |
| 数据接口： | I²C |
| 转换器数目： | 2 |
| 电压电源： | 单电源 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-uMAX |
| 包装： | 管件 |
| 输出数目和类型： | 2 电流，单极 |
| 采样率（每秒）： | * |
Detailed Description
The DS4412 contains two I2C adjustable-current
sources that are each capable of sinking and sourcing
current. Each output, OUT0 and OUT1, has 15 sink and
15 source settings that are programmed through the
I2C interface. The full-scale ranges and corresponding
step sizes of the outputs are determined by external
resistors, connected to pins FS0 and FS1, which can
adjust the output currents over a 4:1 range. The formula
to determine the positive and negative full-scale current
ranges for each of the four outputs is given by:
RFS = (VRFS / IFS) x (15 / 1.974)
where VRFS is the RFS voltage (see DC Electrical
Characteristics), and RFS is the external resistor value.
On power-up, the DS4412 outputs zero current. This is
done to prevent it from sinking or sourcing an incorrect
current before the system host controller has had a
chance to modify the device’s setting.
As a source for biasing instrumentation or other cir-
cuits, the DS4412 provides a simple and inexpensive
current source with an I2C interface for control. The
adjustable full-scale range allows the application to get
the most out of its 4-bit sink or source resolution.
When used in adjustable power-supply applications
(see
Typical Operating Circuit), the DS4412 does not
affect the initial power-up supply voltage because it
defaults to providing zero output current on power-up.
As it sources or sinks current into the feedback voltage
node, it changes the amount of output voltage required
by the regulator to reach its steady state operating
point. Using the external resistor, RFS, to set the output
current range, the DS4412 provides some flexibility for
adjusting the range over which the power supply can
be controlled or margined.
Memory Organization
The DS4412’s current sources are controlled by writing
to the memory addresses in Table 1.
The format of each output control register is given by:
Where:
Example: RFS0 = 4.8k
Ω and register 0xF8h is written to
a value of 0x8Ah. Calculate the output current.
IFS = (0.607V / 4.8k
Ω) x (15 / 1.974) = 949.85A
The MSB of the output register is 1, so the output is
sourcing the value corresponding to position Ah (10 dec-
imal). The magnitude of the output current is equal to:
949.85A x (10 / 15) = 633.23A
DS4412
Dual-Channel, I2C Adjustable
Sink/Source Current DAC
6
_______________________________________________________________________________________
Table 1. Memory Addresses
MEMORY ADDRESS
(HEXADECIMAL)
CURRENT SOURCE
0xF8
OUT0
0xF9
OUT1
MSB
LSB
SXX
X
D3
D2
D1
D0
BIT
NAME
FUNCTION
POWER-ON
DEFAULT
S
Sign Bit
Determines if DAC sources
or sinks current. For sink
S = 0, for source S = 1.
0b
X
Reserved Reserved.
XXX
DX
Data
4-Bit Data Word Controlling
DAC Output. Setting 0000b
outputs zero current
regardless of the state of the
sign bit.
0000b
相关PDF资料 |
PDF描述 |
|---|---|
| DS4424N+ | IC DAC 7BIT 4CH 5.5V 14-TDFN |
| DS4425BN+ | IC OSC CLOCK 425MHZ 10-LCCC |
| DS4426T+T&R | IC DAC I2C-MARGINING 4CH 28-TQFN |
| DS4432U+ | IC DAC 7BIT 2CH 5.5V 8-MSOP |
| DS4625P+150/200 | IC OSC CLOCK 200MHZ 10-LCCC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS4412U+ | 功能描述:数模转换器- DAC 2 Ch I2C Adj Sink/Source Current RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| DS4412U+T&R | 制造商:Maxim Integrated Products 功能描述:DAC 2CH 4BIT 8USOP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC DAC DUAL CH I2C ADJ 8-USOP |
| DS4412U+T&R | 功能描述:数模转换器- DAC 2 Ch I2C Adj Sink/Source Current RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube |
| DS4412U+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Dual-Channel, I2C Adjustable Sink/Source Current DAC |
| DS4412UR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Dual-Channel, I2C Adjustable Sink/Source Current DAC |
发布紧急采购，3分钟左右您将得到回复。