MAX4968ECM+ ,16-Channel, Linear, High-Voltage Analog SwitchesApplicationsMedical Ultrasound ImagingNondestructive Testing (NDT)/Industrial Ultrasound ImagingPri ..
MAX496CSE ,375MHz Quad Closed-Loop Video Buffers, AV = +1 and +2General Description ________
MAX497CPE ,375MHz Quad Closed-Loop Video Buffers, AV = +1 and +2ELECTRICAL CHARACTERISTICS(V = +5V, V = -5V, V = 0V, R = 150Ω, T = T to T , unless otherwise noted. ..
MAX497CPE ,375MHz Quad Closed-Loop Video Buffers, AV = +1 and +2Applications' Low Distortion: 64dBc (f = 10MHz)Computer Workstations' Directly Drives 50Ω or 75Ω B ..
MAX497CPE ,375MHz Quad Closed-Loop Video Buffers, AV = +1 and +2FeaturesThe MAX496 and MAX497 are quad, closed-loop, ±5V ' MAX496 Fixed Gain: +1V/VMAX497 Fixed Ga ..
MAX497CPE+ ,375MHz Quad Closed Loop Video Buffers, AV = +1 and +2ELECTRICAL CHARACTERISTICS(V = +5V, V = -5V, V = 0V, R = 150Ω, T = T to T , unless otherwise noted. ..
MAX912EPE ,Single/Dual / Ultra-Fast / Low-Power / Precision TTL ComparatorsMAX912/MAX91319-0157; Rev 1; 1/94Single/Dual, Ultra-Fast, Low-Power, Precision TTL Comparators_____ ..
MAX912ESE ,Single/Dual / Ultra-Fast / Low-Power / Precision TTL ComparatorsApplications MAX912ESE -40°C to +85°C 16 Narrow SOMAX912MJE -55°C to +125°C 16 CERDIPZero-Crossing ..
MAX912ESE ,Single/Dual / Ultra-Fast / Low-Power / Precision TTL ComparatorsFeaturesThe MAX913 single and MAX912 dual high-speed, ' Ultra Fast (10ns)low-power comparators have ..
MAX912ESE ,Single/Dual / Ultra-Fast / Low-Power / Precision TTL ComparatorsGeneral Description ________
MAX913 ,Single/Dual, Ultra-Fast, Low-Power, Precision TTL ComparatorsELECTRICAL CHARACTERISTICS (continued)V+ = +5V, V- = -5V, V = 1.4V, V = 0V, T = T to T , unless oth ..
MAX9130EXT+T ,Single 500Mbps LVDS Line Receiver in SC70ApplicationsTEMP. PIN- TOPPARTClock Distribution RANGE PACKAGE MARKCellular Phone Base Stations MAX ..
MAX4968ECM+
16-Channel, Linear, High-Voltage Analog Switches
MAX4968/MAX4968A
16-Channel, Linear, High-Voltage
Analog Switches
19-5786; Rev 2; 1/12
Ordering Information/Selector Guide
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.
Applications
Medical Ultrasound Imaging
Nondestructive Testing (NDT)/Industrial
Ultrasound Imaging
Printers
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
+Denotes a lead(Pb)-free/RoHS-compliant package.
PARTTEMP RANGESWITCH CHANNELSBLEED RESISTORPIN-PACKAGE
MAX4968ECM+-40°C to +85°C16No48 LQFP
MAX4968AECM+-40°C to +85°C16Yes48 LQFP
MAX4968/MAX4968A
16-Channel, Linear, High-Voltage
Analog Switches
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
(All voltages referenced to GND.)
VDD Logic Supply Voltage Range ..........................-0.3V to +6V
VPP - VNN Supply Voltage ................................................+212V
VPP Supply Voltage Range ...................................-0.3V to +12V
VNN Negative Supply Voltage ............................................-200V
Logic Input Voltage Range (CLK, DIN, CLR) .........-0.3V to +6V
Logic Input Voltage Range
(LE) ........................-0.3V to a minimum of (VPP + 0.3V) or 6V
Logic Output Voltage Range (DOUT) ......-0.3V to (VDD + 0.3V)
Analog Signal Range (SW_) ........(VNN - 0.3V) to (VNN + 220V)
Continuous Power Dissipation (TA = +70NC)
LQFP (derate 22.7mW/NC above +70NC) .................1818mW
Operating Temperature Range ..........................-40NC to +85NC
Storage Temperature Range ............................-65NC to +150NC
Junction Temperature ................................................... +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
ELECTRICAL CHARACTERISTICS
(VDD = +2.37V to +5.5V, VPP = +10V Q5%, VNN = 0 to -200V, TA = TMIN to TMAX, unless otherwise noted. Typical values are
VDD = +3.3V, VNN = -100V, VPP = +10V at TA = +25NC.) (Note 2)
ABSOLUTE MAXIMUM RATINGS
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to /thermal-tutorial.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
LQFP
Junction-to-Ambient Thermal Resistance (qJA) ..........44°C/W
Junction-to-Case Thermal Resistance (qJC) ...............10°C/W
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
POWER SUPPLIES
VDD Logic Supply VoltageVDD+2.37+5.5V
VNN Supply VoltageVNN-2000V
VPP Supply VoltageVPP+9.5+10+10.5V
VDD Static CurrentIDDS4FA
VDD Dynamic CurrentIDDVDD = +5V, fCLK = 5MHz, fDIN = 2.5MHz200FA
VNN Static CurrentINNSAll switches remain on or off, SW_ = GND1025FA
VNN Supply Dynamic Current
(All Channels Switching
Simultaneously)
INNVPP = +10V, VNN = -100V,
fTURN_ON/OFF = 50kHz, SW_ = GND3.35mA
VPP Supply Static CurrentIPPSAll switches remain on or off, SW_ = GND1225FA
VPP Supply Dynamic Current
(All Channels Switching
Simultaneously)
IPPVPP = +10V, VNN = -100V,
fTURN_ON/OFF = 50kHz, SW_ = GND46mA
SWITCH CHARACTERISTICS
Analog Dynamic Signal RangeVSW_AC operation only, f > 500kHzVNNVNN +
210V
Small-Signal On-ResistanceRONSVPP = +10V, VNN = -100V, VSW_ = 0V,
ISW_ = 5mA1834I
MAX4968/MAX4968A
16-Channel, Linear, High-Voltage
Analog Switches
ELECTRICAL CHARACTERISTICS (continued)
(VDD = +2.37V to +5.5V, VPP = +10V Q5%, VNN = 0 to -200V, TA = TMIN to TMAX, unless otherwise noted. Typical values are
VDD = +3.3V, VNN = -100V, VPP = +10V at TA = +25NC.) (Note 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Small-Signal On-Resistance
MatchingDRONSVPP = +10V, VNN = -100V, ISW_ = 5mA3%
Small-Signal On-Resistance
FlatnessRONF
AC measured, fSW_ = 0.5MHz,
VSW_ = 80VP-P, RLOAD = 50I, VPP = +10V,
VNN = -100V%
Switch Output Bleed ResistorRINTMAX4968A only304050kI
Switch-Off LeakageISW_(OFF)VSW_ = 0V, switch off (MAX4968 only)01FA
Switch-Off DC OffsetNo load (MAX4968A only)-150+15mV
Switch-On DC OffsetNo load (MAX4968A only)-150+15mV
Switch Output Isolation Diode
Current 300ns pulse width, 2% duty cycle3.0A
SWITCH DYNAMIC CHARACTERISITICS
Turn-On TimetONVSW_A = +1V, RL = 100I, VNN = -100V,
from enable to VSW_B = +0.9V25Fs
Turn-Off TimetOFFVSW_A = +1V, RL = 100I, VNN = -100V,
from disable to VSW_B = +0.9V23.5Fs
Maximum VSW_ Slew RatedV/dtCL = 100pF20V/ns
Off-IsolationVISOf = 2MHz, RL = 50I-76dB
CrosstalkVCTf = 5MHz, RL = 50I-76dB
SW_ Off-CapacitanceCSW_(OFF)f = 1MHz, small signal close to zero9pF
SW_ On-CapacitanceCSW_ (ON)f = 1MHz, small signal close to zero13pF
Output Voltage SpikeVSPKRL = 50I±70mV
Large-Signal Analog Bandwidth
(-3dB)fBW_LCLOAD = 200pF, 60V amplitude sinusoidal
burst, 1% duty cycle30MHz
Small-Signal Analog Bandwidth
(-3dB)fBW_SCLOAD = 200pF, 100mV amplitude
sinusoidal 50MHz
Charge InjectionQVPP = +10V, VNN = -100V, Figure 1150pC
LOGIC LEVELS
Logic-Input Low VoltageVIL0.75V
Logic-Input High VoltageVIHVDD -
0.75V
Logic-Output Low VoltageVOL ISINK = 1mA0.4V
Logic-Output High VoltageVOH ISOURCE = 1mAVDD -
0.4V
Logic-Input CapacitanceCIN5pF
Logic-Input LeakageIIN-1+1FA
MAX4968/MAX4968A
16-Channel, Linear, High-Voltage
Analog Switches
ELECTRICAL CHARACTERISTICS (continued)
(VDD = +2.37V to +5.5V, VPP = +10V Q5%, VNN = 0 to -200V, TA = TMIN to TMAX, unless otherwise noted. Typical values are
VDD = +3.3V, VNN = -100V, VPP = +10V at TA = +25NC.) (Note 2)
Note 2: All devices are 100% tested at TA = +85NC. Limits over the operating temperature range are guaranteed by design.
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
TIMING CHARACTERISTICS (Figure 2)
CLK FrequencyfCLK25MHz
DIN to CLK Setup TimetDS8ns
DIN to CLK Hold TimetDH3ns
CLK to LE Setup TimetCS8ns
LE Low Pulse WidthtWL12ns
CLR High Pulse WidthtWC12ns
CLK Rise and Fall TimestR, tF50ns
CLK to DOUT DelaytDOVDD = +5V Q10%, CDOUT = 15pF28nsVDD = +2.5V Q5%, CDOUT = 15pF45
MAX4968/MAX4968A
16-Channel, Linear, High-Voltage
Analog Switches
Test Circuits/Timing Diagrams
SW_B
VDD5V
ILEAK
SW_A
VPPVPP
ILEAK
MAX4968
MAX4968A
GND
SWITCH-OFF LEAKAGE
VNNVNN
SW_B
VOUT
VDD5V
SW_A
VPPVPP
MAX4968
MAX4968A
GND
DC OFFSET ON/OFF
VNNVNN
100kΩ
tON/tOFF TEST CIRCUIT
SW_B
VOUT
VPP - 10V
VDD5V
SW_A
VPPVPP
MAX4968
MAX4968A
GNDVNNVNN
100kΩ
SW_B
VIN = 10VP-P
AT 5MHz
VOUT
VDD5V
SW_A
VPPVPP
MAX4968
MAX4968A
GND
OFF-ISOLATION
VNNVNN
VISO = 20logVOUT
VIN
ISOLATION DIODE
CURRENT
VNNSW_B
VOUT
VDD5V
SW_A
IID
VPPVPP
MAX4968
MAX4968A
GNDVNNVNN
SW_B
VIN = 10VP-P
AT 5MHz
VDD5V
SW_A
VPPVPP
MAX4968
MAX4968A
GND
CROSSTALK
VNNVNN
50Ω
SW_B
SW_A
50Ω
VCT = 20logVOUT
VIN
Q = 1000pF x VOUT
CHARGE INJECTION
SW_B
VOUT
VOUT
100pF
VCOM_
VDD5V
SW_A
VPPVPP
MAX4968
MAX4968A
GNDVNNVNN
OUTPUT VOLTAGE SPIKE
SW_B
VOUT
+VSPK
-VSPK
VDD5V
SW_A
VPPVPP
MAX4968
MAX4968A
GNDVNNVNN
50Ω
1kΩ
SW_B
200pF10mVP-P
VOUTVIN
VDD5V
SW_A
VPPVPP
MAX4968
MAX4968A
GND
SMALL-SIGNAL
BANDWIDTH MEASUREMENT
VNNVNN
SW_B
200pF60VP-P BURST
(1% DUTY CYCLE)
VOUTVIN
VDD5V
SW_A
VPPVPP
MAX4968
MAX4968A
GND
LARGE-SIGNAL
BANDWIDTH MEASUREMENT
VNNVNN
MAX4968/MAX4968A
16-Channel, Linear, High-Voltage
Analog Switches
Figure 2. Serial Interface Timing
Test Circuits/Timing Diagrams (continued)
DINDN+1DN-1DN50%
50%50%
50%
50%50%
50%
90%
10%
50%
tCS
tWL
tDStDH
tDO
tOFF
tWC
tON
50%
CLK
DOUT
OFF
SWITCH
CLR
DIN
DATA FROM PREVIOUS DATA BYTE
POWER-UP DEFAULT: D[15:0] = 0
D15
D15
D14D13
D14D13D0D0D15
LSBMSB
CLK
DOUT
MAX4968/MAX4968A
16-Channel, Linear, High-Voltage
Analog Switches
Typical Operating Characteristics
(VDD = +3V, VPP = +10V, VNN = -100V, RL = 100I, CL = 100pF, TA = +25NC, unless otherwise noted.)
TURN-ON/TURN-OFF TIME
vs.TEMPERATURE
MAX4968 toc01
TEMPERATURE (°C)
TURN-ON/TURN-OFF TIME (µs)3510-15
tONtOFF
OFF-ISOLATION vs. FREQUENCY
MAX4968 toc02
FREQUENCY (MHz)
OFF-ISOLATION (dB)10.10.01
TA = -40°C
TA = +25°CTA = +85°C
SWITCH-OFF LEAKAGE CURRENT
vs.TEMPERATURE
MAX4968 toc03
TEMPERATURE (°C)
SWITCH-OFF LEAKAGE CURRENT (µA)3510-15
ISW_(0FF)
HIGH-VOLTAGE SUPPLY CURRENT
vs. OUTPUT SWITCH FREQUENCY
MAX4968 toc07
SUPPLY CURRENT (mA)302010
ALL SWITCHES SWITCHING
IPP (TA = +85°C)
IPP (TA = +25°C)
IPP (TA = -40°C)
INN (TA = +85°C)
INN (TA = -40°C)
INN (TA = +25°C)
LOGIC POWER-SUPPLY CURRENT
vs. SERIAL-CLOCK FREQUENCY
MAX4968 toc06
LOGIC POWER-SUPPLY CURRENT (µA)161412108642
TA = +85°C
TA = +25°C
TA = +-40°C
POSITIVE AND NEGATIVE POWER-SUPPLY
CURRENT vs. TEMPERATURE
MAX4968 toc05
TEMPERATURE (°C)
SUPPLY CURRENT (µA)3510-15
VPP = +10V
VNN = -100V
VNN = -70V
VNN = -40V
LOGIC POWER-SUPPLY CURRENT vs.
SUPPLY VOLTAGE
MAX4968 toc04
VDD SUPPLY VOLTAGE (V)
LOGIC POWER-SUPPLY CURRENT (µA)
TA = -40°C
TA = +25°C
TA = +85°C
MAX4968/MAX4968A
16-Channel, Linear, High-Voltage
Analog Switches
Pin Configuration
Pin Description
TOP VIEW
LQFP
(7mm × 7mm)13
VNN
N.C.
VPP
N.C.
GND
VDD
DIN
CLK
CLR
DOUT
N.C.23456789101112
SW5A
SW5B
SW6A
SW6B
SW7A
SW7B
SW8A
SW8B
SW9A
SW9B
SW10A
SW10B
SW0ASW0BSW1ASW1BSW2ASW2BSW3ASW3BSW4ASW4B
N.C.N.C.3534333231302928272625
SW15BSW15ASW14BSW14ASW13BSW13ASW12BSW12ASW11BSW11AN.C.N.C.
MAX4968
MAX4968A
PINNAMEFUNCTION
1, 2, 14, 16,
24, 35, 36N.C.No Connection. Not connected
internally.SW4BAnalog Switch 4—TerminalSW4AAnalog Switch 4—TerminalSW3BAnalog Switch 3—TerminalSW3AAnalog Switch 3—TerminalSW2BAnalog Switch 2—TerminalSW2AAnalog Switch 2—TerminalSW1BAnalog Switch 1 —TerminalSW1AAnalog Switch 1—TerminalSW0BAnalog Switch 0—TerminalSW0AAnalog Switch 0—TerminalVNN
Negative High-Voltage Supply.
Bypass VNN to GND with a 0.1FF
or greater ceramic capacitor.
PINNAMEFUNCTIONVPP
Positive Voltage Supply. Bypass
VPP to GND with a 0.1FF or
greater ceramic capacitor.GNDGroundVDD
Logic Supply Voltage. Bypass
VDD to GND with a 0.1FF or
greater ceramic capacitor.DINSerial-Data InputCLKSerial-Clock InputLEActive-Low Latch-Enable Input CLRLatch-Clear InputDOUTSerial-Data OutputSW15BAnalog Switch 15—TerminalSW15AAnalog Switch 15—TerminalSW14BAnalog Switch 14—Terminal
MAX4968/MAX4968A
16-Channel, Linear, High-Voltage
Analog Switches
Detailed 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 typical ultrasound applications, these devices do not
require dedicated high-voltage supply, which implies
a significant simplification of system requirement. The
negative voltage supply can be shared with the transmit-
ter and the positive voltage supply is typically +10V.
Analog Switch
The devices can transmit analog signals up to 210VP-P,
with an analog signal range from VNN to VNN + 210V.
Before starting the high-voltage burst transmission (VP-P
> +20V), the input voltage is required to be close to
GND to allow a proper settling of the pass FET. The high-
voltage burst frequency must be greater than 500kHz.
Extremely long high-voltage bursts (VP-P > +10V) with
duty cycle greater than 20% could result in signal deg-
radation, especially for unipolar transmission. In general,
this applies for burst transmission with a nonzero DC
content.
Low-voltage signal (VP-P < 10V) continuous-wave bipo-
lar transmission is supported for frequencies greater
than 500kHz. For very small signals, such as the small
echoes in typical ultrasound imaging systems (VP-P <
10V), the devices are not limited to a low-frequency
bandwidth and can transmit DC signals.
Voltage Supplies
The devices operate with a high-voltage supply VNN
from -200V to 0, VPP supply of +10V (typ), and a logic
supply VDD (+2.37V to +5.5V).
Pin Description (continued)
PINNAMEFUNCTIONSW14AAnalog Switch 14—TerminalSW13BAnalog Switch 13—TerminalSW13AAnalog Switch 13—TerminalSW12BAnalog Switch 12—TerminalSW12AAnalog Switch 12—TerminalSW11BAnalog Switch 11—TerminalSW11AAnalog Switch 11—TerminalSW10BAnalog Switch 10—TerminalSW10AAnalog Switch 10—TerminalSW9BAnalog Switch 9—Terminal
PINNAMEFUNCTIONSW9AAnalog Switch 9—TerminalSW8BAnalog Switch 8—TerminalSW8AAnalog Switch 8—TerminalSW7BAnalog Switch 7—TerminalSW7AAnalog Switch 7—TerminalSW6BAnalog Switch 6—TerminalSW6AAnalog Switch 6—TerminalSW5BAnalog Switch 5—TerminalSW5AAnalog Switch 5—Terminal
