ltc2978 Linear Technology Corporation, ltc2978 Datasheet - Page 5

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

elecTrical characTerisTics
temperature range, otherwise specifications are at T
otherwise indicated. C
SYMBOL
I
Voltage Buffered IDAC Output Characteristics
N_V
V
INL_V
DNL_V
V
V
C
t
Voltage Supervisor Characteristics
V
N_VS
TUE_VS
t
V
V
R
TUE
Voltage Buffered IDAC Soft-Connect Comparator Characteristics
V
Temperature Sensor Characteristics
TUE_TS
V
V
IN_ADC
S_VDACP
S_VS
FS_VDACP
OS_VDACP
DACP
OUT
IN_VS
IN_SNS
VIN_SNS
VIN_SNS
OS_CMP
OUT
VOUT_ENn
VIN_SNS
DACP
Enable Output (V
DACP
DACP
Input Characteristics
PARAMETER
Input Leakage Current
Differential Input Current
Resolution
Full-Scale Output Voltage
(Programmable)
Integral Nonlinearity
Differential Nonlinearity
Offset Voltage
Load Regulation (V
PSRR (V
DC CMRR (V
Leakage Current
Short-Circuit Current Low
Short-Circuit Current High
Output Capacitance
DAC Output Update Rate
Input Voltage Range (Programmable)
Voltage Sensing Resolution
Total Unadjusted Error
Update Rate
V
V
V
Unadjusted Error
READ_V
Offset Voltage
Total Unadjusted Error
Output High Voltage
IN_SNS
IN_SNS
IN_ON
, V
OUT_EN
Input Voltage Range
Input Resistance
IN
DACPn
IN_OFF
VDD33
Total Unadjusted Error
DACPn
[3:0]) Characteristics
– V
Threshold Total
= 100nF , C
DACMn
DACPn
– V
DACMn
)
– V
)
DACMn
VDD25
)
= 100nF and C
CONDITIONS
V
Current Sense Mode
V
V
DAC Code = 0x3FF
DAC Polarity = 1
(Note 7)
(Note 7)
(Note 7)
V
V
DC: 3.13V ≤ V
100mV Step in 20ns with 50pF Load
–0.1V ≤ V
V
V
V
V
Fast Servo Mode
V
– V
Single-Ended Voltage: V
0V to 3.8V Range: High Resolution Mode
0V to 6V Range: Low Resolution Mode
2V ≤ V
1.5V < V
0.8V ≤ V
3V ≤ V
V
3V ≤ V
V
I
VOUT_ENn
VIN_SNS
VIN_SNS
IN_ADC
IN_ADC
IN_ADC
DACPn
DACPn
DACPn
DACPn
DACPn
DACPn
IN_VS
SENSEMn
A
= 25°C. V
IN_VS
VIN_SNS
VIN_SNS
= (V
= 2.65V, I
= 0.1V, I
Hi-Z, 0V ≤ V
Shorted to GND
Shorted to V
Hi-Z
= 0V, 0V ≤ V
= 0.17V, Current Sense Mode
= 6V, Voltage Sense Mode
IN_VS
IN_VS
> 8V
> 8V
DACMn
= –5µA, V
The
SENSEPn
REF
)
≤ 6V, Low Resolution Mode
DD33
≤ 3.8V, High Resolution Mode
≤ 1.5V, High Resolution Mode
≤ 8V
≤ 8V
= 100nF .
VDACPn
l
PWR
≤ 0.1V
VDACPn
denotes the specifications which apply over the full operating
≤ 3.47V, V
DACPn
DD33
DD33
COMMONMODE
Buffer Gain Setting_0
Buffer Gain Setting_1
= V
Low Resolution Mode
High Resolution Mode
Sinking = 2mA
SENSEMn
Sourcing = 2mA
IN_SNS
= 3.3V
≤ 6V
PWR
= 12V; V
= V
≤ 6V,
DD33
DD33
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
, V
DD25
1.32
2.53
–0.1
11.6
MIN
–10
70
4
0
0
0
and REF pins floating, unless
12.21
1.38
2.65
12.5
TYP
100
100
250
80
10
10
60
40
60
10
90
±3
±1
4
8
LTC2978
±1.25
±100
MAX
±0.5
1.44
2.77
±2.4
±1.0
±1.5
±2.0
±1.0
±1.5
±1.0
14.7
250
±10
110
±18
3.8
0.1
15
±2
–4
10
15
6
ppm/mA
ppm/mA
mV/LSB
mV/LSB
UNITS
2978fa

LSB
LSB
Bits
mV
mA
mA
mV
kΩ
µA
nA
µA
dB
dB
dB
nA
°C
pF
µs
µs
%
%
%
%
%
%
%
V
V
V
V
V
V
V