MAX14803CCM+ Maxim Integrated Products, MAX14803CCM+ Datasheet - Page 10

• Manufacturer Part Number: MAX14803CCM+
• Description: IC SWITCH SPST 48LQFP
• Manufacturer: Maxim Integrated Products
• Series: 4000r

Specifications of MAX14803CCM+

• Function: Switch
• Circuit: SPST
• On-state Resistance: 48 Ohm
• Voltage Supply Source: Single Supply
• Voltage - Supply, Single/dual (±): 2.7 V ~ 5.5 V
• Current - Supply: 5µA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Low-Charge Injection, 16-Channel,
High-Voltage Analog Switches
The MAX14802/MAX14803/MAX14803A provide high-
voltage switching on 16 channels for ultrasound imag-
ing and printer applications. The devices utilize
HVCMOS process technology to provide 16 high-volt-
age low-charge-injection SPST switches, controlled by
a digital interface. Data is clocked into an internal 16-
bit shift register and retained by a programmable latch
with enable and clear inputs. A power-on-reset function
ensures that all switches are open on power-up.
The MAX14802/MAX14803/MAX14803A operate with a
wide range of high-voltage supplies including: V
= +100V/-100V, +200V/0V, or +40V/-160V. The digital
interface operates from a separate +2.7V to +5.5V V
supply. Digital inputs DIN, CLK, LE, and CLR operate
on the V
provide integrated 35kΩ bleed resistors on each switch
terminal to discharge capacitive loads. The MAX14802/
MAX14803/MAX14803A provide integrated clamping
diodes for overvoltage protection against positive over-
shoot and feature clamping diodes (at the COM_).
These clamping diodes provide overvoltage protection
against positive overshoot.
The MAX14802/MAX14803/MAX14803A allow a peak-to-
peak analog signal range from V
either V
must be unconnected, or satisfy V
V
The MAX14802/MAX14803/MAX14803A allow a wide
range of high-voltage supplies. The devices operate
with V
250V. When V
applications), the devices operate with V
+200V. The V
required to be symmetrical, but the voltage difference
(V
10
PP
PP
during power-up and power-down.
______________________________________________________________________________________
- V
NN
NN
NN
DD
from -160V to 0 and V
) must not exceed 250V.
+ 200V or (V
supply voltage. The MAX14803/MAX14803A
PP
NN
and V
is connected to GND (single-supply
Detailed Description
NN
PP
high-voltage supplies are not
High-Voltage Supplies
- 10V). Analog switch inputs
PP
NN
NN
from +40V to V
Analog Switch
to the minimum of
≤ (V
COM_
PP
, V
PP
NO_
up to
NN
/V
NN
DD
) ≤
+
The MAX14803/MAX14803A feature integrated 35kΩ
bleed resistors to discharge capacitive loads such as
piezoelectric transducers. Each analog switch terminal
is connected to GND with a bleed resistor.
The MAX14802/MAX14803/MAX14803A feature clamp-
ing diodes (at the COM_). These clamping diodes pro-
vide overvoltage protection against positive overshoot.
The MAX14802/MAX14803/MAX14803A are controlled
by a serial interface with a 16-bit serial shift register
and transparent latch. Each of the 16 data bits controls
a single analog switch (Table 1). Data on DIN is
clocked with the most significant bit (MSB) first into the
shift register on the rising edge of CLK. Data is clocked
out of the shift register onto DOUT on the rising edge of
CLK. DOUT reflects the status of DIN, delayed by 16
clock cycles (Figures 1 and 2).
Drive LE logic-low to change the contents of the latch
and update the state of the high-voltage switches
(Figure 2). Drive LE logic-high to freeze the contents of
the latch and prevent changes to the switch states. To
reduce noise due to clock feedthrough, drive LE logic-
high while data is clocked into the shift register. After
the data shift register is loaded with valid data, pulse
LE logic-low to load the contents of the shift register
into the latch.
The MAX14802/MAX14803/MAX14803A feature a latch
clear input. Drive CLR logic-high to reset the contents
of the latch to zero and open all switches. CLR does
not affect the contents of the data shift register. Pulse
LE logic-low to reload the contents of the shift register
into the latch.
The MAX14802/MAX14803/MAX14803A feature a
power-on-reset circuit to ensure all switches are open
at power-on. The internal 16-bit serial shift register and
latch are set to zero on power-up.
Bleed Resistors (MAX14803/MAX14803A)
Overvoltage Protection
Latch Enable ( LE )
Latch Clear (CLR)
Power-On Reset
Serial Interface