ltc2978 Linear Technology Corporation, ltc2978 Datasheet - Page 8

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

Typical perForMance characTerisTics
LTC2978
TiMing DiagraM

1.2355
1.2350
1.2345
1.2340
1.2335
1.2330
1.2325
1.2320
1.2315
1.2310
–100
–120
–140
–160
–180
–20
–40
–60
–80
0
–50
–50
Reference Voltage vs Temperature
ADC Zero Code Center Offset
Voltage vs Temperature
THREE TYPICAL PARTS
VOLTAGE SENSE MODE
–35 –20 –5 10 25
SDA
–35 –20 –5 10 25
SCL
t
f
CONDITION
START
TEMPERATURE (°C)
TEMPERATURE (°C)
t
HD(STA)
t
LOW
40 55 70 85
40 55 70 85
t
r
t
HD(DAT)
2978 G01
2978 G04
100
100
t
SU(DAT)
t
HIGH
–0.5
–1.0
–1.5
3.0
2.5
2.0
1.5
1.0
0.5
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0
–0.2
–50
Temperature Sensor Error
vs Temperature
ADC-INL
t
122µV/LSB
f
–35
0.8
–20
t
SU(STA)
–5
1.8
INPUT VOLTAGE (V)
TEMPERATURE (°C)
REPEATED START
10
CONDITION
2.8
25
40
3.8
55
t
HD(SDA)
4.8
70
85
2978 G05
2978 G02
5.8
100
t
SP
t
0.035
0.020
0.010
SU(STO)
0.030
0.025
0.015
0.005
–0.2
–0.4
–0.6
–0.8
–1.0
0.8
0.6
0.4
0.2
0
0
–0.2
–50
ADC Total Unadjusted Error
vs Temperature
ADC-DNL
122µV/LSB
ADC V
–35
t
CONDITION
r
0.8
IN
–20 –5
STOP
= 1.8V
1.8
INPUT VOLTAGE (V)
TEMPERATURE (°C)
t
BUF
10
CONDITION
2.8
START
25
40
3.8
2978 TD
55
4.8
70
2978 G06
85 100
2978 G03
5.8
2978fa