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DC1697A

P1-P3P4-P6P7-P9P10-P10
4
dc1697afa
DEMO MANUAL DC1697A
HARDWARE SETUP
INTVCC can also be used as a 6.3V shunt regulator. For
supplies greater than 80V, simply connect power through
a shunt resister for high or low shunt configuration as
shown in Figure 3 and 4 respectively. For this configuration,
ensure VDD_SEL is set to INTVCC.
The 5k shunt resistor shown provides 15mA to INTVCC at
80V. The allowable range of resistance for a given input
range is given by the following formula:
V
S(MAX)
– 5.9V
35mA
≤ R
SHNT
≤
V
S(MIN)
– 6.7V
1mA +I
LOAD(MAX)
The DC590 provides isolation and level shifting, as the
I
2
C interface is operating at 5.9V to 6.7V below the supply
being monitored.
> 80V
5k
dc1697A F03
Figure 3. Powering DC1697A Using High-Side Shunt Regulator to Allow for Input Voltage Higher Than 80V
Jumper VDD_SEL Set to INTVCC With A Resistor Connected from DC1697 GND to Circuit Ground
5
dc1697afa
DEMO MANUAL DC1697A
HARDWARE SETUP
Figure 4. Powering DC1697A Through Low-Side Shunt Regulator in High-Side Current Sense Topology
Jumper VDD_SEL Set to INTVCC with a Resistor Connected to INTVCC
0V TO 80V
> 80V
5k
LOAD
dc1697A F04
6
dc1697afa
DEMO MANUAL DC1697A
HARDWARE SETUP
Figure 5. Current Monitoring in a –48V System with the DC590 Providing Isolation
–48V systems can also be monitored by simply setting
VDD_SEL to EXTVDD with the –48V input tied to VIN and
GND and the –48V return tied to EXTVDD. The DC590
provides isolation and level shifting, as the I
2
C interface
is operating at –48V with respect to –48V RTN, which is
normally at earth ground potential.
–48V RETURN
–48V INPUT
–48V RETURN
LOAD
dc1697A F05
TO DC590 (PROVIDES ISOLATION)
P1-P3P4-P6P7-P9P10-P10

DC1697A

Mfr. #:
Buy DC1697A
Manufacturer:
Analog Devices Inc.
Description:
Power Management IC Development Tools LTC2945 Demo Board - Wide Range I2C Powe
Lifecycle:
New from this manufacturer.
Delivery:
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