19-5786; Rev 2; 1/12
16-Channel, Linear, High-Voltage
Analog Switches
General Description
Features
S Latch Free
SOI HVCMOS Process Technology for High
The MAX4968/MAX4968A are 16-channel, high-linearity,
high-voltage, bidirectional SPST analog switches with
18I(typ) on-resistance. The devices are ideal for use in
applications requiring high-voltage switching controlled
by a low-voltage control signal, such as ultrasound imag-
ing and printers. The MAX4968A provides integrated
40kI (typ) bleed resistors on each switch terminal to
discharge capacitive loads. Using HVCMOS technol-
ogy, these switches combine high-voltage bilateral MOS
switches and low-power CMOS logic to provide efficient
control of high-voltage analog signals.
Performance and Robustness
S No Dedicated High-Voltage Supplies Required
S R
Flatness Guaranteed in Entire Input Range
ON
S Low-Power Dissipation
S Low-Charge Injection and Voltage Spike
S 25MHz Serial Interface (+2.5V to +5V)
S 2nd Harmonic Distortion < -45dB at 2MHz ꢀ9V
Pulse
The MAX4968 is pin-to-pin compatible with the MAX14802
and Supertex HV2601. The MAX4968A is pin-to-pin
compatible with the MAX14803 and Supertex HV2701.
S Low Parasitic Capacitance Guarantees High
Bandwidth
The only difference is the V
level. The MAX4968/MAX4968A require a low +10V (typ)
positive supply voltage
PP
S DC to 39MHz Small-Signal Analog Bandwidth
(C
= 299pF)
LOAD
voltage (V ), whereas the MAX14802/MAX14803 and
PP
S 599kHz to 29MHz High-Signal Analog Bandwidth
(C = 299pF)
HV2601/HV2701 require a high +100V supply voltage.
LOAD
In a typical ultrasound application, these devices do not
require a dedicated high-voltage supply that implies a sig-
nificant simplification of system requirement. The negative
voltage supply can be shared with the transmitter, and the
positive voltage supply is typically +10V.
S Extended Input Range Up to 219V
P-P
S -89dB (typ) Off-Isolation at 5MHz (59I)
S Shunt (Bleed) Resistors on Outputs (MAX4ꢀ68A
Only)
The devices are available in the 48-pin LQFP package
and are specified over the -40NC to +85NC extended
temperature range.
S Daisy-Chainable Serial Interface
Applications
Medical Ultrasound Imaging
Nondestructive Testing (NDT)/Industrial
Ultrasound Imaging
Printers
Ordering Information/Selector Guide
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
SWITCH CHANNELS
BLEED RESISTOR
PIN-PACKAGE
48 LQFP
MAX4ꢀ68ECM+
MAX4ꢀ68AECM+
16
16
No
Yes
48 LQFP
+Denotes a lead(Pb)-free/RoHS-compliant package.
_______________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.