MAX4968 Datasheet, PDF (1/17 Pages) Maxim Integrated Products – 16-Channel, Linear, High-Voltage Analog Switches

19-5786; Rev 2; 1/12
16-Channel, Linear, High-Voltage
Analog Switches
General Description
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.
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.
The only difference is the VPP positive supply voltage
level. The MAX4968/MAX4968A require a low +10V (typ)
voltage (VPP), whereas the MAX14802/MAX14803 and
HV2601/HV2701 require a high +100V supply voltage.
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.
The devices are available in the 48-pin LQFP package
and are specified over the -40NC to +85NC extended
temperature range.
Features
S Latch Free
SOI HVCMOS Process Technology for High
Performance and Robustness
S No Dedicated High-Voltage Supplies Required
S RON Flatness Guaranteed in Entire Input Range
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 ± 90V
Pulse
S Low Parasitic Capacitance Guarantees High
Bandwidth
S DC to 30MHz Small-Signal Analog Bandwidth
(CLOAD = 200pF)
S 500kHz to 20MHz High-Signal Analog Bandwidth
(CLOAD = 200pF)
S Extended Input Range Up to 210VP-P
S -80dB (typ) Off-Isolation at 5MHz (50I)
S Shunt (Bleed) Resistors on Outputs (MAX4968A
Only)
S Daisy-Chainable Serial Interface
Applications
Medical Ultrasound Imaging
Nondestructive Testing (NDT)/Industrial
Ultrasound Imaging
Printers
Ordering Information/Selector Guide
PART
TEMP RANGE
MAX4968ECM+
MAX4968AECM+
-40°C to +85°C
-40°C to +85°C
+Denotes a lead(Pb)-free/RoHS-compliant package.
SWITCH CHANNELS
16
16
BLEED RESISTOR
No
Yes
PIN-PACKAGE
48 LQFP
48 LQFP
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