19-5253; Rev 0; 4/10
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 V
PP
/V
NN
= +100V/-100V,
+200V/0V, and +40V/-160V. The digital interface oper-
ates from a separate V
DD
supply from +2.7V to +5.5V.
Digital inputs DIN1, DIN2, and
LE
operate on the V
DD
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.
Switches
S
DC to 20MHz Low-Voltage Analog Signal
Features
S
HVCMOS Technology for High Performance
S
Two Sets of 8-Channel SPST High-Voltage Analog
MAX14805/MAX14806
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 (V
PP
- V
NN
=
230V)
Applications
Medical Ultrasound Imaging
Nondestructive Test (NDT)
Ordering Information/Selector Guide
PART
MAX14805CCM+
MAX14806CCM+
SWITCH
CHANNELS
2x8
2x8
BLEED
RESISTOR
No
Yes
SECOND SOURCE
HV2631
HV2731
PIN-PACKAGE
48 TQFP
48 TQFP
Note:
All devices are specified over the extended -40°C to +85°C operating temperature range.
+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.
16-Channel (Two Banks of 8-Channel),
High-Voltage Analog Switches
MAX14805/MAX14806
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
V
DD
Logic Supply Voltage ......................................-0.3V to +7V
V
PP
- V
NN
Supply Voltage ..................................................230V
V
PP
Positive Supply Voltage ..............................-0.3V to +220V
V
NN
Negative Supply Voltage ............................+0.3V to -220V
Logic Inputs Voltage (LE, DIN1, DIN2) ..................-0.3V to +7V
Analog Signal Range (SW_) .......(-0.3V + V
NN
) to (V
NN
+ 200V)
Peak Analog Signal Current per Channel ..............................3A
Continuous Power Dissipation (T
A
= +70NC)
48-Pin TQFP (derate 22.7mW/NC above +70NC) ......1818mW
Junction-to-Ambient Thermal Resistance
B
JA
(Note 1) .................................................................44NC/W
Junction-to-Case Thermal Resistance
B
JC
(Note 1) ................................................................10NC/W
Operating Temperature Range .......................... -40NC to +85NC
Storage Temperature Range............................ -65NC to +150NC
Junction Temperature ................................................... +150NC
Lead Temperature (soldering, 10s) ................................+300NC
Soldering Temperature (reflow) ......................................+260NC
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
www.maxim-ic.com/thermal-tutorial.
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.
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +5.5V, V
PP
= +40V to (V
NN
+ 200V), V
NN
= -40V to -160V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical
values are at T
A
= +25NC.) (Note 2)
PARAMETER
POWER SUPPLIES
V
DD
Supply Voltage
V
PP
Supply Voltage
V
NN
Supply Voltage
V
DD
Supply Quiescent Current
V
DD
Supply Dynamic Current
V
PP
Supply Quiescent Current
V
DD
V
PP
V
NN
I
DDQ
I
DDD
I
PPQ
V
PP
= +40V, V
NN
= -160V, f
SW_
= 50kHz,
f
DIN1
= f
DIN2
= 50kHz,
LE
= GND
I
PPD
V
PP
= +100V, V
NN
= -100V, f
SW_
= 50kHz,
f
DIN1
= f
DIN2
= 50kHz,
LE
= GND
V
PP
= +160V, V
NN
= -40V, f
SW_
= 50kHz,
f
DIN1
= f
DIN2
= 50kHz,
LE
= GND
I
NNQ
V
PP
= +40V, V
NN
= -160V, f
SW_
= 50kHz,
f
DIN1
= f
DIN2
= 50kHz,
LE
= GND
I
NND
V
PP
= +100V, V
NN
= -100V, f
SW_
= 50kHz,
f
DIN1
= f
DIN2
= 50kHz,
LE
= GND
V
PP
= +160V, V
NN
= -40V, f
SW_
= 50kHz,
f
DIN1
= f
DIN2
= 50kHz,
LE
= GND
V
DD
= +5V,
LE
= GND, f
DIN1
= f
DIN2
=
5MHz
2.7
40
-160
100
-100
5.5
V
NN
+ 220
-15
5
2
10
5
6
7
10
5.5
5
4.5
mA
FA
mA
V
V
V
FA
mA
FA
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
PP
Supply Dynamic Current
(All Channel Switching
Simultaneously)
V
NN
Supply Quiescent Current
V
NN
Supply Dynamic Current
(All Channel Switching
Simultaneously)
2
______________________________________________________________________________________
16-Channel (Two Banks of 8-Channel),
High-Voltage Analog Switches
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.5V, V
PP
= +40V to (V
NN
+ 200V), V
NN
= -40V to -160V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical
values are at T
A
= +25NC.) (Note 2)
PARAMETER
SWITCH CHARACTERISTICS
Analog Signal Range
V
SW_
(Note 3)
V
PP
= +40V,
V
NN
= -160V,
V
SW_
= 0V
Small-Signal
On-Resistance
R
ONS
V
PP
= +100V,
V
NN
= -100V,
V
SW_
= 0V
V
PP
= +160V,
V
NN
= -40V,
V
SW_
= 0V
Small-Signal
On-Resistance Matching
Large-Signal Switch
On-Resistance
Shunt Resistance
Switch-Off Leakage
Switch-Off DC Offset
Switch Output Peak Current
Switch Output Isolation Diode
Current
SWITCH DYNAMIC CHARACTERISTICS
Turn-On Time
Turn-Off Time
Output Switching Frequency
Off-Isolation
Crosstalk
Switch Off-Capacitance
(Note 4)
Switch On-Capacitance
(Note 4)
Output Voltage Spike (Note 4)
Small-Signal Analog Bandwidth
t
ON
t
OFF
f
SW
V
ISO
V
CT
C
SW_(OFF)
C
SW_(ON)
V
SPK
f
BW
V
SW_
= V
PP
- 10V, R
L
= 10kI,
V
NN
= -40V to -160V (Figure 1)
V
SW_
= V
PP
- 10V, R
L
= 10kI,
V
NN
= -40V to -160V (Figure 1)
Duty cycle = 50%
f = 5MHz, R
L
= 1kI, C
L
= 15pF (Figure 1)
f = 5MHz, R
L
= 50I (Figure 1)
f = 5MHz, R
L
= 50I (Figure 1)
V
SW_
= 0V, f = 1MHz
V
SW_
= 0V, f = 1MHz
R
L
= 50I (Figure 1)
V
PP
= +100V, V
NN
= -100V, C
L
= 200pF
4
20
-500
20
-50
-77
-80
11
36
18
56
+250
5
5
50
Fs
Fs
kHz
dB
dB
pF
pF
mV
MHz
DR
ONS
R
ONL
R
INT
I
SW_(OFF)
I
SW_
= 5mA
I
SW_
= 200mA
I
SW_
= 5mA
I
SW_
= 200mA
I
SW_
= 5mA
I
SW_
= 200mA
V
NN
28
22
22
18
20
16
5
15
27
40
0
-30
3
2
53
2.5
+30
V
PP
-
10
52
37
34
27
30
23
%
I
kI
FA
mV
A
A
I
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX14805/MAX14806
V
PP
= +100V, V
NN
= -100V, I
SW_
= 5mA
V
SW_
= V
PP
- 10V, I
SW_
= 1A
MAX14806 only
V
SW_
= V
PP
- 10V or unconnected
(MAX14805 only) (Figure 1)
R
L
= 100kI (Figure 1)
100ns pulse width, 0.1% duty cycle
300ns pulse width, 2% duty cycle
(Figure 1)
_______________________________________________________________________________________
3
16-Channel (Two Banks of 8-Channel),
High-Voltage Analog Switches
MAX14805/MAX14806
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.5V, V
PP
= +40V to (V
NN
+ 200V), V
NN
= -40V to -160V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical
values are at T
A
= +25NC.) (Note 2)
PARAMETER
SYMBOL
CONDITIONS
V
PP
= +40V, V
NN
= -160V, V
SW_
= 0V
(Figure 1)
Charge Injection
Q
V
PP
= +100V, V
NN
= -100V, V
SW_
= 0V
(Figure 1)
V
PP
= +160V, V
NN
= -40V, V
SW_
= 0V
(Figure 1)
LOGIC LEVELS (DIN1, DIN2,
LE)
Logic-Input Low Voltage
Logic-Input High Voltage
Logic-Input Capacitance
Logic-Input Leakage Current
Setup Time
Hold Time
Time Width of
LE
V
IL
V
IH
C
IN
I
IN
t
SD
t
HOLD
t
WLE
30
-1
30
30
V
DD
-
0.75
10
+1
MIN
TYP
650
450
250
pC
MAX
UNITS
0.75
V
V
pF
FA
ns
ns
ns
LOGIC TIMING (See Timing Diagram, Figure 2)
Note 2:
All devices are 100% tested at TA = +85NC. Limits over the operating temperature range are guaranteed by design and
characterization.
Note 3:
The analog signal input V
SW_
must satisfy V
NN
P
V
SW_
P
V
PP
or remain unconnected during power-up.
Note 4:
Guaranteed by characterization; not production tested.
4
______________________________________________________________________________________
16-Channel (Two Banks of 8-Channel),
High-Voltage Analog Switches
MAX14805/MAX14806
V
PP
- 10V
R
L
100k
Ω
V
OUT
I
SOL
V
PP
- 10V
V
NN
+ 10V
SW_
V
OUT
SW_
SW_
SW_
MAX14805
MAX14806
R
L
100k
Ω
SW_
MAX14805
MAX14806
V
PP
V
NN
V
DD
GND
5V
V
PP
V
NN
SW_
MAX14805
MAX14806
V
PP
V
NN
V
DD
GND
5V
V
PP
V
NN
V
PP
V
NN
V
DD
GND
5V
V
PP
V
NN
SWITCH-OFF LEAKAGE
DC OFFSET OFF
t
ON
/t
OFF
TEST CIRCUIT
V
OUT
= 10V
P-P
AT 5MHz
SW_
V
OUT
R
L
MAX14805
MAX14806
V
PP
V
NN
V
PP
V
NN
V
DD
GND
5V
V
PP
V
NN
V
OUT
SW_
SW_
I
ID
SW_
V
NN
MAX14805
MAX14806
V
DD
GND
5V
V
OUT
= 10V
P-P
AT 5MHz
SW_
SW_
50
Ω
MAX14805
MAX14806
V
PP
V
NN
V
PP
V
NN
V
DD
GND
5V
SW_
50
Ω
SW_
V
NN
V
PP
V
NN
V
V
ISO
= 20LOG
OUT
V
IN
OFF-ISOLATION
ISOLATION DIODE CURRENT
V
V
CT
= 20LOG
OUT
V
IN
CROSSTALK
V
OUT
V
OUT
1000pF
SW_
V
SW_
V
PP
V
NN
V
PP
V
NN
MAX14805
MAX14806
V
DD
GND
SW_
+V
SPK
V
OUT
-V
SPK
50
Ω
R
L
1k
Ω
SW_
MAX14805
MAX14806
V
PP
V
NN
V
DD
GND
5V
SW_
V
DD
V
PP
V
NN
Q = 1000pF x V
OUT
CHARGE INJECTION
OUTPUT VOLTAGE SPIKE
Figure 1. Test Circuits
_______________________________________________________________________________________
5
单片机
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
