AD5560 Analog Devices, Inc., AD5560 Datasheet - Page 48

• Manufacturer Part Number: AD5560
• Description: 1.2 A Programmable Device Power Supply With Integrated 16-bit Level Setting Dacs
• Manufacturer: Analog Devices, Inc.

AD5560
Table 21. Compensation Register 2
Address
0x5
1
This item corresponds to a SAFEMODE setting ( SAFEMODE is the power-on default setting).
Default
0x0110
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Manual
compensation
R
R
g
C
C
C
C
Reserved
Name
Z[2:0]
P[2:0]
m[1:0]
F[2:0]
C3
C2
C1
Function
The AD5560 can be manually configured to compensate the force amplifier into a wide range of load
conditions. When this bit is high, manual compensation mode is active, and it overrides the settings of
Compensation Register 1. Readback when in manual compensation mode returns the compensation
settings loaded to the force amplifier and loaded to this register. Similarly, when in autocompensation
mode, readback of this register address returns the compensation settings of the force amplifier. However,
readback of this register address when in safe mode does not reflect SAFEMODE settings. SAFEMODE
settings are g
Set the value of R
R
0
1
2
3
4
5
6
7
Set the value of R
creating a pole at one of the following frequencies.
R
0
1
2
3
4
5
6
7
Set the transconductance of the force amplifiers input stage. The gain bandwidth (GBW) of the force
voltage loop is equal to g
g
0
1
2
3
These bits determine which feedforward capacitor C
C
0
1
2
3
4
5
6
7
Connect C
Connect C
Connect C
0
1
1
1
1
mx
Fx
Z
P[2:0]
C3
C2
C1
g
40
80
300
900
in series with 100 kΩ
in series with 25 kΩ
in series with 6 kΩ
m[1:0]
mx
(μA/V)
Z
P
= 2, R
to add a zero at the following frequencies. This calculation assumes that C
to add an additional pole. There is an internal 8 pF capacitor to provide an RC filter,
Rev. B | Page 48 of 60
P
[2:0] = 0, R
R
500
1.6 k
5 k
16 k
50 k
160 k
500 k
1.6 M
mx
Zx
/C
R
200
675
2280
7700
26 k
88 k
296 k
1 M
(Ω)
P
C0
Data Bits, MSB First
(Ω)
1
. The following values assume C
1
1
Z[2:0]
Action
None
C
C
C
C
C
None
None
F0
F1
F2
F3
F4
= 0, C
F
3.2 M
1 M
320 k
100 k
32 k
10 k
3.2 k
1 k
F
100 M
29 M
8.7 M
2.6 M
760 k
220 k
67 k
20 k
GBW (Hz)
64 k
130 k
480 k (default)
1.3 M
Z
P
(Hz)
(Hz)
C[3:1
] = 111, C
Fx
is switched in.
F[2:0]
= 5, and C
C0
= 100 pF.
C0
= 1.
C0
= 100 pF.