Microchip HV2721 Handleiding

Microchip Niet gecategoriseerd HV2721

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2019 Microchip Technology Inc. DS20006082A-page 1
HV2621/HV2721/HV2722
Features
• 300V,16-Channel High-Voltage Analog Switch
• 3.3V or 5.0V CMOS Input Logic Level
• 33 MHz Data Shift Clock Frequency
• Very Low Quiescent Current (10 µA)
• Low Parasitic Capacitance
• DC to 50 MHz Analog Small-Signal Frequency
• -60 dB Typical Off Isolation at 5.0 MHz
• Excellent Noise Immunity
• Cascadable Serial Data Register with Latches
• Flexible Operating Supply Voltage
• Integrated Bleed Resistors on the Outputs (both
sides for HV2721, one side only for HV2722)
Applications
• Medical Ultrasound Imaging
• Nondestructive Testing (NDT) Metal Flaw
Detection
• Multi-Layer Printed Circuit Board (PCB) Tester
• Piezoelectric Transducer Drivers
• Inkjet Printer Head
• Optical MEMS Module
General Description
The HV2621/HV2721/HV2722 devices are 300V,
low-charge injection, 16-channel, high-voltage analog
switches. These devices are designed for use in
applications requiring high-voltage switching
controlled by low-voltage control signals, such as
medical ultrasound imaging, piezoelectric transducer
drivers. HV2621/HV2721 are almost identical to
HV2601/2701 but have larger signal range. If the
VPP/VNN = ±150V, HV2621/HV2721/HV2722 can pass
the analog signal up to ±135V.
The HV2721 has integrated bleed resistors on both
sides of the switches. HV2722 has integrated bleed
resistors on one side, SWxA only. HV2621 has no
bleed resistors. The bleed resistor eliminates voltage
build-up on capacitive loads such as piezoelectric
transducers.
Input data are shifted into a 16-bit shift register that
can then be retained in a 16-bit latch. To change all the
switch state at the same time, the latch enable bar
should be left high until all bits are clocked in. The
input data are clocked in at the rising edge of the
clock. After all bits are clocked in to the shift register, a
negative pulse of the latch enable bar changes all the
switch ON/OFF states defined by input data at the
same time. Using the HVCMOS technology, these
devices combine 300V high-voltage bilateral DMOS
switches and low-power CMOS logic to provide
efficient control of high-voltage analog signals.
These devices are suitable for various combinations of
high-voltage supplies, e.g., VPP/VNN: +60V/-240V,
+150V/-150V, and +260V/-40V.
Package Types
1
64
HV2621/HV2721/HV2722
9x9x1.0mm QFN
(TOP VIEW)
300V, Low-Charge Injection, 16-Channel,
High-Voltage Analog Switch
HV2621/HV2721/HV2722
DS20006082A-page 2 2019 Microchip Technology Inc.
Block Diagram
VNNCLR
CLK
DIN
GND
VDD
DOUT
Bleed
Resistors
RGNDLE
Latches
16-Bit
Shift
Register
Level
Shifter
Output
Switches
SW0A
SW0B
D
LE
CLR
SW1A
SW1B
D
LE
CLR
SW2A
SW2B
D
LE
CLR
SW14A
SW14B
D
LE
CLR
SW15A
SW15B
D
LE
CLR
HV2721 has bleed resistors at SWxA and SWxB
HV2722 has bleed resistors at SWxA only
VPP
2019 Microchip Technology Inc. DS20006082A-page 3
HV2621/HV2721/HV2722
1.0 ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Logic Supply Voltage (VDD).......................................................................................................................... -0.5V to 6.5V
Differential Supply Voltage (V
PP-VNN).......................................................................................................................330V
Positive Supply Voltage (VPP).............................................................................................................-0.5V to V
NN+300V
Negative Supply Voltage (VNN)................................................................................................................. -300V to +0.5V
Logic Input Voltage (VIN).....................................................................................................................-0.5V to V
DD +0.3V
Analog Signal Range (V
SIG)............................................................................................................................ V
NN to VPP
Peak Analog Signal Current/Channel (I
PK) ...................................................................................................................3A
† Notice: Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at those or any other conditions above those indicated in the
operational sections of this specification is not intended. Exposure to maximum rating conditions for extended periods
may affect device reliability.
RECOMMENDED OPERATING CONDITIONS (NOTES 1,,)2 3
Parameter Sym. Min. Typ. Max. Units Conditions
Logic Supply Voltage VDD 3 — 5.5 V
Differential Supply Voltage VPP-VNN 60 — 300 V
Positive Supply Voltage V
PP 60 — 260 V
Negative Supply Voltage VNN -240 — 0 V
High-Level Input Voltage VIH 0.9VDD — VDD V
Low-Level Input Voltage V
IL 0 — 0.1VDD V
Analog Signal Voltage Peak-to-Peak VSIG VNN+15 — VPP-15 V
Note 1: Recommended power up sequence is VDD, VPP and VNN. Power down is in reverse order.
2: VSIG must be VNN
≤ V SIG ≤ VPP or floating during power up/down transition.
3: Rise and fall times of power supplies, V
DD, VPP and VNN should be greater than 1.0 ms.
DC ELECTRICAL CHARACTERISTICS
Unless otherwise specified, V
PP = +150V, VNN = -150V, VDD = 5.0V, TA= 25°C. Boldface specifications apply over
the full operating temperature range.
Parameter Sym. Min. Typ. Max. Units Conditions/Comments
Small Signal Switch On-Resistance RONS
— 26 48 ΩISIG
= 5 mA VPP = +60V,
VNN
= -240V
— 22 32 ΩISIG
= 150 mA
— 22 30 ΩISIG
= 5 mA VPP = +150V,
VNN
= -150V
— 18 27 ΩISIG
= 150 mA
— 20 30 ΩISIG
= 5 mA VPP = +260V,
VNN
= -40V
— 16 27 ΩISIG
= 150 mA
Small Signal Switch On-Resistance
Matching ∆RONS — 5 20 %ISIG
= 5 mA, VPP = +150V,
VNN
= -150V
Large Signal Switch On-Resistance RONL — 17 — ΩVSIG
= V PP-15V, ISIG =1A
Value of Output Bleed Resistor
(HV2721/HV2722 Only) RINT 30 50 70 kΩOutput switch to RGND,
IRINT = 0.5 mA
Switch Off Leakage per Switch ISOL — 1 15 μAVSIG
= V PP-15V, VNN+15V.
See Figure 3-1
DC Offset Switch Off
VOS
— 1 10
mV
RLOAD = 35 kΩ (HV2621), 70 kΩ
(HV2722), No load (HV2721), see
Figure 3-2
DC Offset Switch On — 1 10

Product specificaties

Merk: Microchip
Categorie: Niet gecategoriseerd
Model: HV2721

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