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參數(shù)資料
| 型號(hào)： | DS4432U+T&R |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 9/9頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAC 7BIT 2CH 5.5V 8-MSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 3,000 |
| 位數(shù)： | 7 |
| 數(shù)據(jù)接口： | I²C，串行 |
| 轉(zhuǎn)換器數(shù)目： | 2 |
| 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： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-uMAX |
| 包裝： | 帶卷 (TR) |
| 輸出數(shù)目和類型： | 2 電流，單極 |
| 采樣率（每秒）： | * |
DS4432
Dual-Channel, I2C, 7-Bit Sink/Source
Current DAC
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 9
2008 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
IOUT0 is chosen to be 100A (midrange source/sink
current for the DS4432). Summing the currents into the
feedback node, we have the following:
where
and
To create a 20% margin in the supply voltage, the value
of VOUT is set to 2.4V. With these values in place, R0B
is calculated to be 2.67k
Ω, and R0A is calculated to be
4k
Ω. The current DAC in this configuration allows the
output voltage to be moved linearly from 1.6V to 2.4V
using 127 settings. This corresponds to a resolution of
6.3mV/step.
VCC Decoupling
To achieve the best results when using the DS4432,
decouple the power supply with a 0.01F or 0.1F
capacitor. Use a high-quality ceramic surface-mount
capacitor if possible. Surface-mount components mini-
mize lead inductance, which improves performance,
and ceramic capacitors tend to have adequate high-
frequency response for decoupling applications.
I
VV
R
RA
OUT
FB
A
0
=
I
V
R
RB
FB
B
0
=
II
I
OUT
R B
R A
00
0
=
DC-DC
CONVERTER
FB
OUT
SDA
SCL
OUT0
GND
RFS0 = 80k
Ω
4.7k
Ω
4.7k
Ω
VCC
VOUT = 2.0V*
FS0
R0B = 2.67k
Ω
R0A = 4k
Ω
VFB = 0.8V*
IR0A
IR0B
IOUT0
DS4432
*VOUT AND VFB VALUES ARE DETERMINED BY THE DC-DC CONVERTER AND SHOULD NOT BE CONFUSED WITH VOUT AND VRFS OF THE DS4432.
Figure 3. Example Application Circuit
PACKAGE TYPE
PACKAGE CODE
DOCUMENT NO.
8 SOP
U8+1
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.
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