MAX4800ACQI 데이터 시트보기 (PDF) - Maxim Integrated
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MAX4800ACQI
Maxim Integrated
MAX4800ACQI Datasheet PDF : 16 Pages
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MAX4800A/MAX4802A
Low-Charge-Injection, 8-Channel, High-Voltage
Analog Switches with 20MHz Serial Interface
DIN
DN+1
50%
DN
50%
DN-1
LE
CLK
DOUT
tWL
50%
50%
tCS
50%
50%
tDS
tDH
tDO
ON
SWITCH
OFF
10%
tOFF
CLR
50%
50%
tWC
*FOR SLOWER CLK RATES REFER TO THE MAX4800/MAX4801/MAX4802 DATA SHEET.
Figure 1. Serial Interface Timing*
tON
90%
Detailed Description
The MAX4800A/MAX4802A provide high-voltage
switching on eight channels for ultrasound imaging
and printer applications. The devices utilize BCDMOS
process technology to provide eight high-voltage low-
charge-injection SPST switches, controlled by a 20MHz
serial interface. Data is clocked into an internal 8-bit shift
register and retained by a programmable latch with enable
and clear inputs. A power-on reset function ensures that
all switches are open on power-up.
The devices operate with a wide range of high-voltage
supplies including: VPP/VNN = +100V/-100V, +185V/-15V,
or +40V/-160V. The digital interface operates from a
separate VDD supply from +2.7V to +6V. Digital inputs
DIN, CLK, LE, and CLR are +6V tolerant, independent
of the VDD supply voltage. The MAX4802A provides
integrated 35kΩ bleed resistors on each switch terminal
to discharge capacitive loads.
The devices are drop-in replacements for the Supertex
HV2203 and HV2303, respectively.
Analog Switch
The devices allow a peak-to-peak analog-signal range
from VNN + 10V to VPP - 10V. Analog switch inputs must
be unconnected, or satisfy VNN ≤ (VCOM_, VNO_) ≤ VPP
during power-up and power-down.
High-Voltage Supplies
The devices allow a wide range of high-voltage
supplies. The devices operate with VNN from
-160V to -15V and VPP from +40V to (VNN + 200V).
When VNN is connected to GND (single-supply
applications), the devices operate with VPP up to +200V.
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