Linear Technology Analog Devices LT8708-1, Datasheet

Page: 6 / 36

LT8708-1
6
Rev 0
For more information www.analog.com
ELECTRICAL CHARACTERISTICS
The
l
denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C. V
INCHIP
=12V, SHDN = 3V, DIR = 3.3V unless otherwise noted. (Note 3).
PARAMETER CONDITIONS MIN TYP MAX UNITS
Current Regulation Loops (Refer to Block Diagram to Locate Amplifiers)
Regulation Voltages for IMON_INP and IMON_OP
V
C
= 1.2V
l
1.185 1.209 1.231 V
Regulation Voltages for IMON_INN V
C
= 1.2V
l
1.185 1.21 1.24 V
Line Regulation for IMON_INP, IMON_INN and IMON_OP Error
Amp Reference Voltage
V
INCHIP
= 12V to 80V 0.002 0.005 %/V
CSPIN Bias Current V
CSPIN
= 12V
V
CSPIN
= 1.5V
0.01
0.01
µA
µA
CSNIN Bias Current BOOST Capacitor Charge Control Block Not Active
V
SWEN
= 3.3V, V
CSPIN
= V
CSNIN
= 12V
V
SWEN
= 3.3V, V
CSPIN
= V
CSNIN
= 1.5V
V
SWEN
= 0V
84
4.25
0.01
µA
µA
µA
CSPIN, CSNIN Common Mode Operating Voltage Range
l
0 80 V
CSPIN, CSNIN Differential Mode Operating Voltage Range
l
–100 100 mV
IMON_INP Output Current V
CSPIN
– V
CSNIN
= 50mV, V
CSNIN
= 5V
V
CSPIN
– V
CSNIN
= 50mV, V
CSNIN
= 5V
V
CSPIN
– V
CSNIN
= 5mV, V
CSNIN
= 5V
V
CSPIN
– V
CSNIN
= 5mV, V
CSNIN
= 5V
l
l
67
64.5
22.5
20
70
70
25
25
73
75.5
27.5
30
µA
µA
µA
µA
IMON_INN Output Current V
CSNIN
– V
CSPIN
= 50mV, V
CSNIN
= 5V
V
CSNIN
– V
CSPIN
= 50mV, V
CSNIN
= 5V
V
CSNIN
– V
CSPIN
= 5mV, V
CSNIN
= 5V
V
CSNIN
– V
CSPIN
= 5mV, V
CSNIN
= 5V
l
l
66
65
19
18
70
70
25
25
74
75
30.5
32
µA
µA
µA
µA
IMON_INP and IMON_INN Max Output Current
l
120 µA
IMON_INP Error Amp EA5 g
m
190 µmho
IMON_INP Error Amp EA5 Voltage Gain 130 V/V
IMON_INN Error Amp EA1 g
m
FBIN = 0V, FBOUT = 3.3V 190 µmho
IMON_INN Error Amp EA1 Voltage Gain FBIN = 0V, FBOUT = 3.3V 130 V/V
CSPOUT Bias Current V
CSPOUT
= 12V
V
CSPOUT
= 1.5V
0.01
0.01
µA
µA
CSNOUT Bias Current BOOST Capacitor Charge Control Block Not Active
V
SWEN
= 3.3V, V
CSPOUT
= V
CSNOUT
= 12V
V
SWEN
= 3.3V, V
CSPOUT
= V
CSNOUT
= 1.5V
V
SWEN
= 0V
83
4.25
0.01
µA
µA
µA
CSPOUT, CSNOUT Common Mode Operating Voltage Range
l
0 80 V
CSPOUT, CSNOUT Differential Mode Operating Voltage Range
l
–100 100 mV
IMON_ON Output Current V
CSNOUT
– V
CSPOUT
= 50mV, V
CSNOUT
= 5V
V
CSNOUT
– V
CSPOUT
= 50mV, V
CSNOUT
= 5V
V
CSNOUT
– V
CSPOUT
= 5mV, V
CSNOUT
= 5V
V
CSNOUT
– V
CSPOUT
= 5mV, V
CSNOUT
= 5V
V
CSNOUT
– V
CSPOUT
= −5mV, V
CSNOUT
= 5V
V
CSNOUT
– V
CSPOUT
= −5mV, V
CSNOUT
= 5V
l
l
l
67
65
22.5
20.5
12.5
10.5
70
70
25
25
15
15
73
75
27.5
29
17.5
19.5
µA
µA
µA
µA
µA
µA
IMON_ON Max Output Current
l
120 µA
CSPOUT–CSNOUT Regulation Voltage Regulate V
C
to 1.2V
R
IMON_OP
= 17.4kΩ
V
CSNOUT
= 12V
ICP = 1.218V, ICN = 0V
l
43 50 55 mV
ICP = 0V, ICN = 1.218V
l
–55 –50 –44 mV
ICP = ICN = 0.348V
l
–6 0 6 mV