MAX4936CTN+ Maxim Integrated Products, MAX4936CTN+ Datasheet

Multiplexer Switch ICs OCTAL HV T/R SWITCH Octal HV T/R Switch

MAX4936CTN+

Manufacturer Part Number
MAX4936CTN+
Description
Multiplexer Switch ICs OCTAL HV T/R SWITCH Octal HV T/R Switch
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX4936CTN.pdf (19 pages)

Specifications of MAX4936CTN+

Number Of Channels
8 Channel
On Time (max)
200 ns
Off Time (max)
100 ns
Supply Voltage (max)
5.5 V
Supply Voltage (min)
1.62 V
Supply Current
1.5 mA
Maximum Power Dissipation
3279 mW
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Package / Case
TQFN-56
Mounting Style
SMD/SMT
Off Isolation (typ)
- 50 dB
Off State Leakage Current (max)
3 uA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
19-5541; Rev 1; 3/11
The MAX4936–MAX4939 are octal, high-voltage, transmit/
receive (T/R) switches. The T/R switches are based on
a diode bridge topology, and the amount of current
in the diode bridges can be programmed through an
SPIK interface. All devices feature a latch-clear input
to asynchronously turn off all T/R switches and put the
device into a low-power shutdown mode. The MAX4936/
MAX4938 include the T/R switch and grass-clipping
diodes, performing both transmit and receive operations.
The MAX4937/MAX4939 include just the T/R switch and
perform the receive operation only.
The MAX4936/MAX4938 transmit path is low impedance
during high-voltage transmit and high impedance during
low-voltage receive, providing isolation between transmit
and receive circuitry. The high-voltage transmit path is
high bandwidth, low distortion, and low jitter.
The receive path for all devices is low impedance dur-
ing low-voltage receive and high impedance during
high-voltage transmit, providing protection to the receive
circuitry. The low-voltage receive path is high bandwidth,
low noise, low distortion, and low jitter. Each T/R switch
can be individually programmed on or off, allowing these
devices to also be used as receive path multiplexers.
The MAX4936/MAX4937 feature clamping diodes to
protect the receiver input from voltage spikes due to
leakage currents flowing through the T/R switches dur-
ing transmission. The MAX4938/MAX4939 do not have
clamping diodes and rely on clamping diodes integrated
in the receiver front end.
All devices are available in a small, 56-pin, 5mm x 11mm
TQFN package, and are specified over the commercial
0NC to +70NC temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
**Future product—contact factory for availability.
SPI is a trademark of Motorola, Inc.
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.
MAX4936CTN+
MAX4937CTN+
MAX4938CTN+**
MAX4939CTN+**
Octal High-Voltage Transmit/Receive Switches
PART
_______________________________________________________________ Maxim Integrated Products 1
LOW-VOLTAGE
General Description
ISOLATION
Yes
Yes
No
No
HIGH-VOLTAGE
PROTECTION
Yes
Yes
Yes
Yes
Ordering Information/Selector Guide
OUTPUT CLAMP
S
S
S
S
S
S
S
S
S
S
S
Low Power: Low Impedance (5ω) with 1.5mA Bias
Current Only
Low Noise < 0.5nV/√Hz (typ) with 1.5mA Bias
Current Only
Wide -3dB Bandwidth 65MHz (typ)
Easy Programming with SPI Interface
High Density (8 Channels per Package)
Grass-Clipping Diodes with Low-Voltage Isolation
(MAX4936/MAX4938)
Output Clamp Diodes for Receiver Protection
(MAX4936/MAX4937)
Global Shutdown Control (CLR)
Each T/R Switch Can Be Individually Programmed
On or Off
Low-Voltage Receive Path with High-Voltage
Protection
Space-Saving, 5mm x 11mm, 56-Pin TQFN Package
Yes
Yes
No
No
Medical/Industrial Imaging
Ultrasound
High-Voltage Transmit and Low-Voltage Isolation
TEMP RANGE
0NC to +70NC
0NC to +70NC
0NC to +70NC
0NC to +70NC
Applications
PIN-PACKAGE
56 TQFN-EP*
56 TQFN-EP*
56 TQFN-EP*
56 TQFN-EP*
Features

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MAX4936CTN+ Summary of contents

Page 1

... All devices are available in a small, 56-pin, 5mm x 11mm TQFN package, and are specified over the commercial 0NC to +70NC temperature range. LOW-VOLTAGE PART ISOLATION Yes MAX4936CTN+ No MAX4937CTN+ Yes MAX4938CTN+** No MAX4939CTN+** +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. ...

Page 2

Octal High-Voltage Transmit/Receive Switches ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND, unless otherwise noted.) V Positive Supply Voltage ...................................-0. LVCC_ Positive Supply Voltage ....................-0. LVEE_ Negative Supply Voltage ....................-6V ...

Page 3

Octal High-Voltage Transmit/Receive Switches ELECTRICAL CHARACTERISTICS (continued +1.62V to +5.5V +2.7V to +5.5V unless otherwise noted. Typical values are at T PARAMETER SYMBOL HV_ Off-Leakage Current I COM_ Off-Leakage Current I LCOM_ NO_ ...

Page 4

Octal High-Voltage Transmit/Receive Switches ELECTRICAL CHARACTERISTICS (continued +1.62V to +5.5V +2.7V to +5.5V unless otherwise noted. Typical values are at T PARAMETER SYMBOL 2nd Harmonic Distortion 3rd Harmonic Distortion Two-Tone Intermodulation Distortion (Note ...

Page 5

Octal High-Voltage Transmit/Receive Switches ELECTRICAL CHARACTERISTICS (continued +1.62V to +5.5V +2.7V to +5.5V unless otherwise noted. Typical values are at T PARAMETER SYMBOL Positive Logic Supply Current Positive Analog Supply Current Positive Analog ...

Page 6

Octal High-Voltage Transmit/Receive Switches D DIN CLK DOUT OFF T/R SWITCH ON CLR 50% Figure 1. Serial Interface Timing 6 ______________________________________________________________________________________ D 50% 50% N 50 ...

Page 7

Octal High-Voltage Transmit/Receive Switches (V = +3V +5V -5V wise noted I  SUPPLY CURRENT  2.0 ONE CHANNEL ON 1.5 1.0 ...

Page 8

Octal High-Voltage Transmit/Receive Switches (V = +3V +5V -5V wise noted.) PSRR vs. FREQUENCY - 200Ω NO_ R = 200Ω COM_ PSRR_V EE -75 -80 PSRR_V CC -85 1 ...

Page 9

Octal High-Voltage Transmit/Receive Switches TOP VIEW NO1 49 LVCC1 CLR 52 GND 53 N.C. 54 COM1 55 HV1 NO1 49 ...

Page 10

Octal High-Voltage Transmit/Receive Switches PIN NAME MAX4936/ MAX4937/ MAX4938 MAX4939 15, 18, 54 13, 15, 16, 18, 19, 21, 54 COM3 5 — COM4 8 — ...

Page 11

Octal High-Voltage Transmit/Receive Switches PIN NAME MAX4936/ MAX4937/ MAX4938 MAX4939 24 24 CLK 25 25 DIN 26 26 DOUT 27 27 LVCC8 28 28 NO8 29 29 LVEE8 30 30 LVCC7 31 31 NO7 32 32 LVEE7 33 33 LVCC6 ...

Page 12

Octal High-Voltage Transmit/Receive Switches PIN NAME MAX4936/ MAX4937/ MAX4938 MAX4939 41 41 LVCC4 42 42 LVEE3 LVCC3 45 45 LVEE2 LVCC2 48 48 LVEE1 LVCC1 ...

Page 13

Octal High-Voltage Transmit/Receive Switches Functional Diagram V DD MAX4936−MAX4939 (SINGLE CHANNEL) * HV_ COM_ V CC LVEE_ SPI LOGIC GND CLK DIN DOUT LE CLR *LOW-VOLTAGE ISOLATION DIODES AVAILABLE ON MAX4936/MAX4938 ONLY. **OUTPUT CLAMP DIODES AVAILABLE ON MAX4936/MAX4937 ONLY. Detailed ...

Page 14

Octal High-Voltage Transmit/Receive Switches LVCC (LVEE DIODE BRIDGE Figure 3. Diode Bias Current Control LE CLK DIN D11 MSB D11' DOUT Figure 4. Latch-Enable Interface Timing 14 _____________________________________________________________________________________ Drive CLR logic-high to reset the ...

Page 15

Octal High-Voltage Transmit/Receive Switches Table 1. Serial Interface Programming DATA BITS (LSB ...

Page 16

Octal High-Voltage Transmit/Receive Switches Applications Information For medical ultrasound applications, see Figures 5, 6, and 7. Ultrasound-Specific IMD3 Specification Unlike typical communications applications, the two input tones are not equal in magnitude for the ultrasound-spe- cific IMD3 two-tone specification. In ...

Page 17

Octal High-Voltage Transmit/Receive Switches TRANSDUCERS HV MUX HV MUX HV MUX CONNECTORS Figure 6. Ultrasound T/R Path with One Transmit per Receive Channel and External Isolation (One Channel Only) TRANSDUCERS HV MUX HV RELAY MUX MUX HV MUX CONNECTORS Figure ...

Page 18

Octal High-Voltage Transmit/Receive Switches Figure 8. Ultrasound IMD3 Measurement Technique DIN CLK LE CLR Figure 9. Interfacing Multiple Devices by Daisy-Chaining Chip Information PROCESS: BCDMOS 18 _____________________________________________________________________________________ Application Diagrams (continued) ULTRASOUND IMD3 F1 - ( ...

Page 19

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 2011 Maxim Integrated Products © ...

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