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參數(shù)資料
| 型號(hào)： | DS4426T+T&R |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 15/15頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC I2C-MARGINING 4CH 28-TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 位數(shù)： | 8 |
| 數(shù)據(jù)接口： | I²C |
| 轉(zhuǎn)換器數(shù)目： | 4 |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 28-TQFN-EP（4x4） |
| 包裝： | 帶卷 (TR) |
| 輸出數(shù)目和類型： | 4 電流，單極 |
| 采樣率（每秒）： | * |
Ratiometric Tracking
The DS4426 can maintain a defined ratio between a
slave voltage and the master voltage where:
KSM = VSLAVE/VMASTER.
In Figure 5, this ratio is given by the following:
KSM = [RB[3:1]/(RA[3:1] + RB[3:1])]/[RD[3:1]/(RC[3:1]
+ RD[3:1])].
Nonratiometric tracking is the special case where KSM = 1.
Power-Supply Tracking Loop Gain Stability
Slave DC-DC output tracking is controlled by the
DS4426 sourcing current into the slave DC-DC's feed-
back loop. This changes the stability of the loop during
tracking. The amount of gain used can be adjusted by
changing the ratio of RL/RG. If oscillations occur,
increasing RG reduces gain and increases the system’s
phase margin. If the slave DC-DC has a compensation
pin, the RC network connected to this pin can also be
adjusted to improve phase margin. This pin is often
labeled COMP or ITH. A larger compensation time con-
stant (increased R and/or increased C) often increases
the stability of the system during tracking; however, this
also modifies the DC-DC's transient response. In order
to prevent modification of the slave DC-DC’s transient
response after power-supply tracking is complete, RG
should first be modified before adjusting the compen-
sation network. The higher the gain, the less the gain
error. Reducing the gain increases the gain error during
tracking. See Figure 4 for more information.
DS4426
Quad-Channel, I2C-Margining IDACs with
Three Channels of Power-Supply Tracking
_______________________________________________________________________________________
9
DS4426
RFS0
RFS[3:1]
RC[3:1]
RG[3:1]
10k
Ω
10k
Ω
RB[3:1]
RTHR[3:1]
RA[3:1]
10k
Ω
RE0
RF0
RD[3:1]
0.1
μF
SDA
VCC
SCL
A0
A1
FS0
OUT0
I2C CONTROL
INTERFACE
VCC
5.0V
I2C
VREF
REF
1.24V
INP[3:1]
FS[3:1]
OUT[3:1]
INN[3:1]
THR[3:1]
GAIN[3:1]
VREF/2
10k
Ω
VOUT
FB
MASTER
DC-DC
CONVERTER
RE[3:1]
RF[3:1]
VOUT
FB
SLAVE
DC-DC
CONVERTER
COMP
x3
Figure 5. Typical DC-DC Power-Supply Tracking Application
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS443 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| DS4432 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Dual-Channel, I2C, 7-Bit Sink/Source Current DAC |
| DS4432U+ | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 2Ch I2C Adj Sink-Source RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
| DS4432U+T&R | 制造商:Maxim Integrated Products 功能描述:DUAL-CHANNEL, I?C ADJUSTABLE SINK/SOURCE CURRENT DAC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:MXMDS4432U+T&R DUAL-CHANNEL, I?°?C ADJUSTA 制造商:Maxim Integrated Products 功能描述:IC DAC 7BIT 2CH 5.5V 8-MSOP |
| DS4432U+T&R | 功能描述:數(shù)模轉(zhuǎn)換器- DAC 2Ch I2C Adj Sink-Source RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量:1 DAC 輸出端數(shù)量:1 轉(zhuǎn)換速率:2 MSPs 分辨率:16 bit 接口類型:QSPI, SPI, Serial (3-Wire, Microwire) 穩(wěn)定時(shí)間:1 us 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-14 封裝:Tube |
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