MAX4800 MAXIM [Maxim Integrated Products], MAX4800 Datasheet - Page 9

• Manufacturer Part Number: MAX4800
• Description: Low-Charge Injection, 8-Channel, High-Voltage Analog Switches
• Manufacturer: MAXIM [Maxim Integrated Products]

The MAX4800/MAX4801/MAX4802 provide high-volt-
age 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 digital
interface. Data is clocked into an internal 8-bit shift reg-
ister 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 MAX4800/MAX4801/MAX4802 operate with a wide
range of high-voltage supplies including: V
+100V/-100V, +185V/-15V, or +40V/-160V. The digital
interface operates from a separate V
+2.7V to +13.2V. Digital inputs DIN, CLK, LE, and CLR
are +13.2V tolerant, independent of the V
voltage. The MAX4802 provides integrated 35kΩ bleed
Figure 1. Serial Interface Timing
SWITCH
DOUT
CLR
DIN
OFF
LE
CLK
ON
8-Channel, High-Voltage Analog Switches
D
N+1
_______________________________________________________________________________________
50%
Detailed Description
50%
t
WC
DD
50%
t
DS
supply from
50%
DD
PP
/V
supply
NN
t
WL
=
D
N
t
CS
50%
t
resistors on each switch terminal to discharge capaci-
tive loads.
The MAX4800 and MAX4802 are drop-in replacements
for the Supertex HV20220 and HV232, respectively.
The MAX4801 is a drop-in replacement for the Supertex
HV20320.
The MAX4800/MAX4801/MAX4802 allow a peak-to-
peak analog signal range from V
Analog switch inputs must be unconnected, or satisfy
V
power-down.
The MAX4800/MAX4801/MAX4802 allow a wide range
of high-voltage supplies. The devices operate with V
from -160V to -15V and V
DO
50%
NN
Low-Charge Injection,
t
OFF
≤ (V
t
DH
COM_
10%
, V
NO_
) ≤ V
50%
PP
PP
from +40V to V
High-Voltage Supplies
during power-up and
NN
D
N-1
50%
+ 10V to V
Analog Switch
t
ON
90%
NN
PP
+ 200V.
- 10V.
NN
9