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PDF MAX14806 Data sheet ( Hoja de datos )
| Número de pieza | MAX14806 | |
| Descripción | High-Voltage Analog Switches | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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19-5253; Rev 0; 4/10
www.DataSheet4U.com
16-Channel (Two Banks of 8-Channel),
High-Voltage Analog Switches
General Description
The MAX14805/MAX14806 provide high-voltage switch-
ing on 16 channels for ultrasonic imaging. Both devices
are ideal for the following applications: banks selection in
biplane or triplane ultrasound probes and relays replace-
ment. The devices utilize 200V process technology to
provide sixteen high-voltage, low-charge injection SPST
switches, controlled by a digital interface.
The MAX14805/MAX14806’s output switches are con-
figured as two sets of eight SPST analog switches. The
switches are controlled by two input logic controls, DIN1
and DIN2 (respectively for switch 0 to 7 and switch 8
to 15). The MAX14806 features integrated 40kI bleed
resistors on each switch terminal, which help to reduce
voltage buildup in capacitive loads such as piezoelectric
elements.
The MAX14805/MAX14806 operate with a wide range of
high-voltage supplies, including VPP/VNN = +100V/-100V,
+200V/0V, and +40V/-160V. The digital interface oper-
ates from a separate VDD supply from +2.7V to +5.5V.
Digital inputs DIN1, DIN2, and LE operate on the VDD
supply voltage.
The MAX14805CCM+ is a drop-in replacement for the
Supertex HV2631. The MAX14806CCM+ is a drop-in
replacement for the Supertex HV2731. Both devices are
available in the 48-pin, TQFP package and are specified
for the extended -40NC to +85NC temperature range.
Features
S HVCMOS Technology for High Performance
S Two Sets of 8-Channel SPST High-Voltage Analog
Switches
S DC to 20MHz Low-Voltage Analog Signal
Frequency Range
S +2.7V to +5.5V Logic Supply Voltage
S Ultra-Low (0.1µA) (typ) Quiescent Current
S Low-Charge Injection, Low-Capacitance 20I
Switches
S -77dB (typ) Off-Isolation at 5MHz (50I)
S Flexible, High-Voltage Supplies (VPP - VNN =
230V)
Applications
Medical Ultrasound Imaging
Nondestructive Test (NDT)
Ordering Information/Selector Guide
PART
SWITCH
CHANNELS
BLEED
RESISTOR
SECOND SOURCE
MAX14805CCM+
2x8
No HV2631
MAX14806CCM+
2x8
Yes HV2731
Note: All devices are specified over the extended -40°C to +85°C operating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
PIN-PACKAGE
48 TQFP
48 TQFP
________________________________________________________________ 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.
1 page  
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16-Channel (Two Banks of 8-Channel),
High-Voltage Analog Switches
ISOL
VPP - 10V
VNN + 10V
SW_
SW_
MAX14805
MAX14806
VPP VPP
VDD
VNN VNN
GND
VOUT
RL
100kΩ
5V VPP
VNN
SW_
SW_
MAX14805
MAX14806
VPP VDD
VNN GND
VPP - 10V
RL
100kΩ
VOUT
SW_
SW_
MAX14805
MAX14806
5V VPP VPP
VDD
VNN VNN
GND
5V
SWITCH-OFF LEAKAGE
DC OFFSET OFF
tON/tOFF TEST CIRCUIT
VOUT = 10VP-P
AT 5MHz
VOUT
RL
VPP
VNN
SW_
SW_
MAX14805
MAX14806
VPP VDD
VNN GND
VISO
=
20LOG
VOUT
VIN
OFF-ISOLATION
SW_
VOUT IID
SW_
VNN
5V
VPP
VNN
VNN
VPP
VNN
MAX14805
MAX14806
VDD
GND
ISOLATION DIODE CURRENT
VOUT = 10VP-P
AT 5MHz
50Ω
VPP
5V
VNN
SW_ SW_
SW_ SW_
MAX14805
MAX14806
VPP VDD
VNN GND
VCT
=
20LOG
VOUT
VIN
CROSSTALK
50Ω
5V
VOUT
VOUT
VSW_
SW_
1000pF
SW_
MAX14805
MAX14806
VPP VPP
VDD
VNN VNN
GND
+VSPK
-VSPK
VOUT
50Ω
RL
1kΩ
VDD VPP
VNN
SW_
SW_
MAX14805
MAX14806
VPP VDD
VNN GND
5V
Figure 1. Test Circuits
Q = 1000pF x VOUT
CHARGE INJECTION
OUTPUTVOLTAGE SPIKE
_______________________________________________________________________________________ 5
5 Page 
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16-Channel (Two Banks of 8-Channel),
High-Voltage Analog Switches
Application Diagram
HIGH-VOLTAGE TRANSMIT
1 PER CHANNEL
±100V MAX
MAINFRAME
PROBE SELECTION
2 TO 4 PROBES
MAX14805
MAX14806
PROBES
CABLE
1 PER CHANNEL TRANSDUCERS
±1A TO ±2A MAX
LOW-VOLTAGE RECEIVE
64 TO 128 CHANNELS
±1V MAX
+V
10mA TYP
HIGH-VOLTAGE
ISOLATION
PROBE
A
-V
Figure 3. Relay Replacement Application in Medical System
PROBE
B
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet MAX14806.PDF ] | |
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