參數(shù)資料
型號(hào): MAX198BMYI
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 模擬信號(hào)調(diào)理
英文描述: Multirange, Single %V, 12-Bit DAS with 12-Bit Bus Interface
中文描述: SPECIALTY ANALOG CIRCUIT, CDIP28
封裝: 0.600 INCH, SIDE BRAZED, CERAMIC, DIP-28
文件頁數(shù): 15/16頁
文件大?。?/td> 165K
代理商: MAX198BMYI
Layout, Grounding, and Bypassing
Careful printed circuit board layout is essential for best
system performance. For best performance, use a
ground plane. To reduce crosstalk and noise injection,
keep analog and digital signals separate. Digital
ground lines can run between digital signal lines to
minimize interference. Connect analog grounds and
DGND in a star configuration to AGND. For noise-free
operation, ensure the ground return from AGND to the
supply ground is low impedance and as short as possi-
ble. Connect the logic grounds directly to the supply
ground. Bypass V
DD
with 0.1μF and 4.7μF capacitors
to AGND to minimize high- and low-frequency fluctua-
tions. If the supply is excessively noisy, connect a 5
resistor between the supply and V
DD
, as shown in
Figure 12.
M
Multirange, S ingle +5V, 12-Bit DAS
with 12-Bit Bus Interfac e
______________________________________________________________________________________
15
V
DD
GND
DGND
DGND
AGND
+5V
+5V
SUPPLY
R* = 5
DIGITAL
CIRCUITRY
4.7
μ
F
0.1
μ
F
** CONNECT AGND AND DGND WITH A GROUND PLANE OR A SHORT TRACE
MAX196
MAX198
**
Figure 12. Power-Supply Grounding Connection
_________________________________________________________Func tional Diagram
T/H
THREE-STATE, BIDIRECTIONAL
I/O INTERFACE
12
10k
12
8
CHARGE REDISTRIBUTION
12-BIT DAC
CLOCK
SIGNAL
CONDITIONING
BLOCK
&
OVERVOLTAGE
TOLERANT
MUX
CONTROL LOGIC
&
LATCHES
REF
REFADJ
+2.5V
REFERENCE
D0–D11
12-BIT DATA BUS
CH5
CH4
CH3
CH2
CH1
CH0
CLK
CS
WR
RD
INT
V
DD
AGND
DGND
MAX196
MAX198
A
=
1.638
COMP
SUCCESSIVE-
APPROXIMATION
REGISTER
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