ltc2978 Linear Technology Corporation, ltc2978 Datasheet - Page 10

• Manufacturer Part Number: ltc2978
• Description: Octal Pmbus Power Supply Monitor And Controller With Eeprom
• Manufacturer: Linear Technology Corporation

Typical perForMance characTerisTics
500µV/DIV
LTC2978
0
2.690
2.678
2.698
2.696
2.694
2.692
2.688
2.686
2.684
2.682
2.680
2.5
2.3
2.1
1.9
1.7
1.5
1.3
1.1
0.9
0.7
0.5
–50
0
Voltage Buffered IDAC Offset
Voltage vs Temperature
Voltage Buffered IDAC Load
Regulation (Sourcing)
IDAC Voltage Buffer Transient
Response to 1LSB DAC Code
Change
CODE ‘h1FF
–35
–0.25
–20
–0.5
–5
TEMPERATURE (°C)
–0.75
CURRENT (mA)
10
2µs/DIV
25
–1 –1.25
–40°C
85°C
25°C
40 55
CODE ‘h200
–1.50 1.75
70
85
2978 G16
2978 G19
2978 G22
100
–2
10mV/DIV
0.1038
0.1036
0.1034
0.1032
0.1030
0.1028
0.1026
–0.2
–0.4
–0.6
–0.8
–1.0
1.0
0.8
0.6
0.4
0.2
0
0
0
Voltage Buffered IDAC-INL
IDAC Voltage Buffer Load
Regulation (Sinking)
IDAC Voltage Buffer Soft Connect
Transient Response when
Transitioning from Hi-Z State to
ON State
100k SERIES RESISTANCE ON
CODE: ‘h1FF
0.25
HI-Z
200
0.5
0.75
CURRENT (mA)
400
–40°C
85°C
25°C
DAC CODE
500µs/DIV
1
600
1.25
CONNECTED
1.5 1.75
800
2978 G17
2978 G20
1000
2978 G23
2
10mV/DIV
–0.2
–0.4
–0.6
–0.8
–1.0
9.00
8.95
8.90
8.85
8.80
8.75
8.70
1.0
0.8
0.6
0.4
0.2
0
–50
0
Voltage Buffered IDAC DNL
IDAC Voltage Buffer Short-Circuit
Current vs Temperature
100k SERIES RESISTANCE ON
CODE: ‘h1FF
IDAC Voltage Buffer Soft Connect
Transient Response when
Transitioning from ON State to
Hi-Z State
–35
CONNECTED
200
–20
–5
TEMPERATURE (°C)
400
10
DAC CODE
500µs/DIV
25
600
40
55
HI-Z
800
70
85
2978 G18
2978 G21
2978fa
1000
2978 G24
100