MAX4802A Maxim, MAX4802A Datasheet - Page 9

• Manufacturer Part Number: MAX4802A
• Description: The MAX4800A/MAX4802A provide high-voltage switching on eight channels for ultrasonic imaging and printer applications
• Manufacturer: Maxim

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: V
+185V/-15V, or +40V/-160V. The digital interface oper-
ates from a separate V
Digital inputs DIN, CLK, LE, and CLR are +6V tolerant,
independent of the V
Figure 1. Serial Interface Timing*
Low-Charge-Injection, 8-Channel, High-Voltage
*FOR SLOWER CLK RATES REFER TO THE MAX4800/MAX4801/MAX4802 DATA SHEET.
SWITCH
Analog Switches with 20MHz Serial Interface
DOUT
CLR
DIN
OFF
ON
LE
CLK
D
N+1
_______________________________________________________________________________________
50%
DD
Detailed Description
DD
supply voltage. The MAX4802A
PP
supply from +2.7V to +6V.
/V
50%
NN
t
WC
= +100V/-100V,
50%
t
DS
50%
t
WL
D
N
t
CS
50%
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.
The devices allow a peak-to-peak analog-signal range
from V
must be unconnected, or satisfy V
V
The devices allow a wide range of high-voltage sup-
plies. The devices operate with V
-160V to -15V and V
When V
tions), the devices operate with V
t
DO
50%
NO_
t
OFF
) ≤ V
NN
NN
t
DH
PP
+ 10V to V
is connected to GND (single-supply applica-
during power-up and power-down.
10%
PP
PP
from +40V to (V
50%
- 10V. Analog switch inputs
High-Voltage Supplies
D
N-1
50%
Analog Switch
t
ON
PP
NN
up to +200V.
NN
90%
≤ (V
NN
+ 200V).
COM_
from
9
,