EVAL-AD5560EBUZ Analog Devices Inc, EVAL-AD5560EBUZ Datasheet - Page 57

• Manufacturer Part Number: EVAL-AD5560EBUZ
• Description: Evaluation Board
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD5560EBUZ

• Main Purpose: Power Management, Power Supply Supervisor/Tracker/Sequencer
• Utilized Ic / Part: AD5560
• Primary Attributes: *
• Secondary Attributes: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Embedded: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

USING THE HCAV
The first set of power supplies, AV
to the DAC levels and associated circuitry. They also supply the
force amplifier stage for the low current ranges (ranges using
internal sense resistors up to 25 mA maximum).
The second set of power supplies, HCAV
are intended to be used to minimize power consumption in
the AD5560 device for the EXTFORCE1 range (up to ±1.2 A).
Similarly, the HCAV
EXTFORCE2 range (up to ±500 mA). These supplies must be
less than or equal to the AV
high currents at low voltages, power can be greatly minimized
by ensuring that the supplies are at the lowest voltages.
Therefore, HCAV
to different power rails as required by the set voltage range.
However, the design of the high current output stage means
that these supplies always have to be at a higher voltage than
the forced voltage, irrespective of the current range being used.
Therefore, depending on the level of supply switching, external
diodes may be required in series with each of the HCAV
and HCAV
AV
SS
SS
x supplies, as shown in Figure 57. There are
1. LOW CURRENT,
= –5V
0.1µF
10µF
HIGH VOLTAGE
AV
SS
DD
x and HCAV
SS
= +28V
Figure 57. Example of Using the Extra Supply Rails Within the AD5560 to Achieve Multiple Voltage/Current Ranges
DD
2 and HCAV
0.1µF
10µF
x AND HCAV
DD
DV
and AV
CC
DD
= 3V/5V
0.1µF
DD
x can be switched externally
DD
and AV
2 supplies are used for the
SS
supplies. When driving
SS
SS
x SUPPLIES
1 and HCAV
SS
, provide power
2. HIGHEST CURRENT
33kΩ
RANGE
HCAV
DD
DD
1,
SS
x
0.1µF
10µF
33kΩ
1 = –5V
Rev. C | Page 57 of 60
OUTPUT RANGE
–2.5V TO +3.5V
HCAV
DD
(5µA, 25µA, 250µA, 2.5mA, 25mA)
0.1µF
1 = +6V
10µF
INTERNAL RANGE SELECT
1200mA
RANGE
±0.5V AT FULL CURRENT
INTERNAL R
internal pull-up resistors between the supplies (see Figure 57).
Using diodes here allows a more flexible use of supplies and
can minimize the amount of supply switching required. In the
example, the AV
voltage needs, whereas the HCAV
support the low voltage, higher current ranges. Diode selection
should take into account the current carrying requirements.
Supply selection for HCAV
allow for this extra voltage drop.
POWER SUPPLY SEQUENCING
When the supplies are connected to the AD5560, it is important
that the AGND and DGND pins be connected to the relevant
ground plane before the positive or negative supplies are applied.
In most applications, this is not an issue because the ground
pins for the power supplies are connected to the ground pins of
the AD5560 via ground planes. The AV
must be applied to the device either before or at the same time
as the HCAV
There are no known supply sequences surrounding the DV
supply, although it is recommended that it be applied as
indicated by the absolute maximum ratings (see Table 3).
SENSE
ALLOW ±0.5V FOR EXT R
DD
100kΩ
3. MIDCURRENT
x and HCAV
HCAV
DD
RANGE
and AV
SS
0.1µF
10µF
100kΩ
2 = –5V
HCAV
OUTPUT RANGE
–0.2V TO +6.5V
SS
OUTPUT RANGE
DD
SS
DD
supplies can support the high
x supplies, as indicated in Table 3.
x and HCAV
0.1µF
10µF
2 = +9V
SENSE
0V TO +25V
AD5560
DD
500mA
RANGE
x and HCAV
DD
and AV
SS
FORCE
DUT RANGE
0V TO +25V
EXTFORCE1
DUT RANGE
–2V TO +3V
x supplies must
ALLOW ±0.5V
FOR EXT R
EXTFORCE2
DUT RANGE
0V TO +6V
SS
x supplies
SS
AD5560
supplies
SENSE
CC