Rainbow Electronics MAX14806 User Manual
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 switching on 16 channels for ultrasonic imaging. Both devices
are ideal for the following applications: banks selection in
biplane or triplane ultrasound probes and relays replacement. 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 configured 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 operates 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 (V
230V)
- VNN =
PP
Applications
Medical Ultrasound Imaging
Nondestructive Test (NDT)
MAX14805/MAX14806
Ordering Information/Selector Guide
PART
MAX14805CCM+ 2 x 8 No HV2631 48 TQFP
MAX14806CCM+ 2 x 8 Yes HV2731 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
SWITCH
CHANNELS
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.
BLEED
RESISTOR
SECOND SOURCE PIN-PACKAGE
16-Channel (Two Banks of 8-Channel),
High-Voltage Analog Switches
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.)
VDD Logic Supply Voltage ......................................-0.3V to +7V
VPP - VNN Supply Voltage ..................................................230V
VPP Positive Supply Voltage ..............................-0.3V to +220V
VNN Negative Supply Voltage ............................+0.3V to -220V
Logic Inputs Voltage (LE, DIN1, DIN2) ..................-0.3V to +7V
Analog Signal Range (SW_) .......(-0.3V + VNN) to (VNN + 200V)
Peak Analog Signal Current per Channel ..............................3A
Continuous Power Dissipation (TA = +70NC)
48-Pin TQFP (derate 22.7mW/NC above +70NC) ......1818mW
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
MAX14805/MAX14806
(VDD = +2.7V to +5.5V, VPP = +40V to (VNN + 200V), VNN = -40V to -160V, TA = T
values are at TA = +25NC.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
POWER SUPPLIES
V
Supply Voltage V
DD
VPP Supply Voltage V
VNN Supply Voltage V
V
Supply Quiescent Current I
DD
V
Supply Dynamic Current I
DD
V
Supply Quiescent Current I
PP
V
Supply Dynamic Current
PP
(All Channel Switching
Simultaneously)
DD
PP
NN
DDQ
DDD
PPQ
I
PP
VDD = +5V, LE = GND, f
5MHz
V
= +40V, VNN = -160V, f
PP
f
= f
DIN1
DIN2
V
= +100V, VNN = -100V, f
PP
f
= f
DIN1
DIN2
VPP = +160V, VNN = -40V, f
f
= f
DIN1
DIN2
V
Supply Quiescent Current I
NN
V
Supply Dynamic Current
NN
(All Channel Switching
Simultaneously)
NNQ
I
NN
V
= +40V, VNN = -160V, f
PP
f
= f
DIN1
DIN2
V
= +100V, VNN = -100V, f
PP
f
= f
DIN1
DIN2
VPP = +160V, VNN = -40V, f
f
= f
DIN1
DIN2
Junction-to-Ambient Thermal Resistance
BJA (Note 1) .................................................................44NC/W
Junction-to-Ambient Thermal Resistance
BJC (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
MIN
to T
, unless otherwise noted. Typical
MAX
2.7 5.5 V
V
40 100
NN
+ 220
-160 -100 -15 V
5
= f
DIN2
=
2 mA
DIN1
10
= 50kHz,
SW_
= 50kHz, LE = GND
SW_
= 50kHz, LE = GND
SW_
= 50kHz, LE = GND
= 50kHz,
= 50kHz,
5
6
7
10
= 50kHz,
SW_
= 50kHz, LE = GND
SW_
= 50kHz, LE = GND
SW_
= 50kHz, LE = GND
= 50kHz,
= 50kHz,
5.5
5
4.5
V
FA
FA
mA
FA
mA
2 ______________________________________________________________________________________
16-Channel (Two Banks of 8-Channel),
High-Voltage Analog Switches
ELECTRICAL CHARACTERISTICS (continued)
(VDD = +2.7V to +5.5V, VPP = +40V to (VNN + 200V), VNN = -40V to -160V, TA = T
values are at TA = +25NC.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SWITCH CHARACTERISTICS
Analog Signal Range V
Small-Signal
On-Resistance
Small-Signal
On-Resistance Matching
DR
Large-Signal Switch
On-Resistance
Shunt Resistance R
Switch-Off Leakage I
SW_(OFF)
Switch-Off DC Offset
R
R
SW_
ONS
ONS
ONL
INT
(Note 3) V
V
= +40V,
PP
V
= -160V,
NN
V
= 0V
SW_
V
= +100V,
PP
V
= -100V,
NN
V
= 0V
SW_
V
= +160V,
PP
V
= -40V,
NN
V
= 0V
SW_
VPP = +100V, VNN = -100V, I
V
= V
SW_
PP
- 10V, I
I
= 5mA 28 52
SW
I
= 200mA 22 37
SW
I
= 5mA 22 34
SW
I
= 200mA 18 27
SW
I
= 5mA 20 30
SW
I
= 200mA 16 23
SW
SW_
= 1A 15
SW_
MAX14806 only 27 40 53
V
= VPP - 10V or unconnected
SW_
(MAX14805 only) (Figure 1)
RL = 100kI (Figure 1)
Switch Output Peak Current 100ns pulse width, 0.1% duty cycle 3 A
Switch Output Isolation Diode
Current
300ns pulse width, 2% duty cycle
(Figure 1)
SWITCH DYNAMIC CHARACTERISTICS
V
= V
Turn-On Time t
Turn-Off Time t
Output Switching Frequency f
Off-Isolation V
Crosstalk V
Switch Off-Capacitance
(Note 4)
Switch On-Capacitance
(Note 4)
C
SW_(OFF)VSW_
C
SW_ (ON)VSW_
Output Voltage Spike (Note 4) V
Small-Signal Analog Bandwidth f
ON
OFF
SW
ISO
CT
SPK
BW
SW_
VNN = -40V to -160V (Figure 1)
V
SW_
VNN = -40V to -160V (Figure 1)
Duty cycle = 50% 50 kHz
f = 5MHz, RL = 1kI, CL = 15pF (Figure 1)
f = 5MHz, RL = 50I (Figure 1)
f = 5MHz, RL = 50I (Figure 1)
RL = 50I (Figure 1)
V
= +100V, V
PP
- 10V, RL = 10kI,
PP
= V
- 10V, RL = 10kI,
PP
= 0V, f = 1MHz 4 11 18 pF
= 0V, f = 1MHz 20 36 56 pF
= -100V, CL = 200pF 20 MHz
NN
MIN
to T
, unless otherwise noted. Typical
MAX
V
-
NN
PP
10
= 5mA 5 %
0 2.5
-30 +30 mV
2 A
5
5
-50
-77
-80 dB
-500 +250 mV
MAX14805/MAX14806
V
I
I
kI
FA
Fs
Fs
dB
_______________________________________________________________________________________ 3
16-Channel (Two Banks of 8-Channel),
High-Voltage Analog Switches
ELECTRICAL CHARACTERISTICS (continued)
(VDD = +2.7V to +5.5V, VPP = +40V to (VNN + 200V), VNN = -40V to -160V, TA = T
values are at TA = +25NC.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
V
= +40V, V
PP
(Figure 1)
V
= +100V, V
Charge Injection Q
LOGIC LEVELS (DIN1, DIN2, LE)
Logic-Input Low Voltage V
Logic-Input High Voltage V
Logic-Input Capacitance C
Logic-Input Leakage Current I
LOGIC TIMING (See Timing Diagram, Figure 2)
MAX14805/MAX14806
Setup Time t
Hold Time t
Time Width of LE
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
Note 4: Guaranteed by characterization; not production tested.
IL
IH
IN
IN
SD
HOLD
t
WLE
must satisfy VNN P V
SW_
PP
(Figure 1)
V
= +160V, V
PP
(Figure 1)
SW_
= -160V, V
NN
= -100V, V
NN
= -40V, V
NN
P VPP or remain unconnected during power-up.
SW_
SW_
SW_
MIN
= 0V
= 0V
= 0V
to T
, unless otherwise noted. Typical
MAX
650
450
250
0.75 V
VDD -
0.75
10 pF
-1 +1
30 ns
30 ns
30 ns
pC
V
FA
4 ______________________________________________________________________________________
VPP - 10V
V
+ 10V
NN
16-Channel (Two Banks of 8-Channel),
High-Voltage Analog Switches
MAX14805/MAX14806
V
- 10V
PP
R
L
100k
I
SOL
SW_
SW_
V
OUT
R
100k
MAX14805
MAX14806
V
V
V
PP
NN
PP
V
NN
V
GND
DD
V
5V
V
SW_
SW_
L
Ω
MAX14805
MAX14806
V
PP
NN
PP
V
NN
V
GND
DD
5V
Ω
V
OUT
SW_
SW_
MAX14805
MAX14806
V
V
V
PP
NN
PP
V
NN
V
GND
5V
DD
V
V
OUT
= 10V
OUT
AT 5MHz
R
L
V
V
SWITCH-OFF LEAKAGE
P-P
SW_
SW_
V
OUT
SW_
SW_
MAX14805
MAX14806
V
PP
NN
PP
V
NN
= 20LOG
V
ISO
OFF-ISOLATION
V
OUT
V
OUT
V
GND
V
OUT
V
IN
5V
DD
V
PP
V
NN
SW_
1000pF
SW_
V
SW_
MAX14805
MAX14806
V
V
V
PP
NN
PP
V
NN
DC OFFSET OFF
I
ID
V
NN
MAX14805
MAX14806
V
NN
V
PP
V
NN
ISOLATION DIODE CURRENT
+V
SPK
-V
V
V
DD
DD
GND
SPK
V
= 10V
OUT
AT 5MHz
50
Ω
V
SW_
SW_
PP
V
NN
MAX14805
V
DD
5V
GND
V
OUT
50
Ω
R
L
1k
Ω
MAX14806
V
V
V
PP
NN
PP
V
NN
tON/t
TEST CIRCUIT
OFF
P-P
SW_
SW_
SW_
SW_
50
Ω
MAX14805
MAX14806
V
PP
V
NN
= 20LOG
V
CT
CROSSTALK
V
DD
V
GND
V
OUT
V
IN
5V
5V
DD
GND
Figure 1. Test Circuits
_______________________________________________________________________________________ 5
Q = 1000pF x V
OUT
CHARGE INJECTION
OUTPUTVOLTAGE SPIKE
Loading...