Datasheet

LTC2977
7
2977fa
For more information www.linear.com/LTC2977
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
J
= 25°C. V
PWR
= V
IN_SNS
= 12V; V
DD33
, V
DD25
, REFP and REFM pins floating,
unless otherwise indicated. C
VDD33
= 100nF, C
VDD25
= 100nF and C
REF
= 100nF.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
DAC Soft-Connect Comparator Characteristics
V
OS_CMP
Offset Voltage V
DACPn
= 0.2V
l
±1 ±18 mV
V
DACPn
= 1.3V
l
±2 ±26 mV
V
DACPn
= 2.65V
l
±3 ±52 mV
Temperature Sensor Characteristics
TUE_TS Total Unadjusted Error ±1 °C
V
OUT
Enable Output (V
OUT_EN
[3:0]) Characteristics
V
VOUT_ENn
Output High Voltage (Note 10) I
VOUT_ENn
= –5µA, V
DD33
= 3.3V
l
10 12.5 14.7 V
I
VOUT_ENn
Output Sourcing Current V
VOUT_ENn
Pull-Up Enabled, V
VOUT_ENn
= 1V
l
–5 –6 –8 µA
Output Sinking Current Strong Pull-Down Enabled,
V
VOUT_ENn
= 0.4V
l
3 5 8 mA
Weak Pull-Down Enabled, V
VOUT_ENn
= 0.4V
l
33 50 60 µA
Output Leakage Current Internal Pull-Up Disabled,
0V ≤ V
VOUT_ENn
≤ 15V
l
±1 µA
V
OUT
Enable Output (V
OUT_EN
[7:4]) Characteristics
I
VOUT_ENn
Output Sinking Current Strong Pull-Down Enabled,
V
OUT_ENn
= 0.1V
l
3 6 9 mA
Output Leakage Current 0V ≤ V
VOUT_ENn
≤ 6V
l
±1 µA
V
IN
Enable Output (V
IN_EN
) Characteristics
V
VIN_EN
Output High Voltage I
VIN_EN
= –5µA, V
DD33
= 3.3V
l
10 12.5 14.7 V
I
VIN_EN
Output Sourcing Current V
IN_EN
Pull-Up Enabled, V
VIN_EN
= 1V
l
–5 –6 –8 µA
Output Sinking Current V
VIN_EN
= 0.4V
l
3 5 8 mA
Leakage Current Internal Pull-Up Disabled,
0V ≤ V
VIN_EN
≤ 15V
l
±1 µA
EEPROM Characteristics
Endurance (Notes 6, 9) 0°C < T
J
< 85°C During EEPROM Write
Operations
l
10,000 Cycles
Retention (Notes 6, 9) T
J
< 105°C
l
20 Years
t
MASS_WRITE
Mass Write Operation Time (Note 7) STORE_USER_ALL, 0°C < T
J
< 85°C During
EEPROM Write Operations
l
440 4100 ms
Digital Inputs SCL, SDA, CONTROL0, CONTROL1, WDI/RESETB, FAULTB00, FAULTB01, FAULTB10, FAULTB11, WP
V
IH
High Level Input Voltage
l
2.1 V
V
IL
Low Level Input Voltage
l
1.5 V
V
HYST
Input Hysteresis 20 mV
I
LEAK
Input Leakage Current 0V ≤ V
PIN
≤ 5.5V, SDA, SCL, CONTROLn
Pins Only
l
±2 µA
0V ≤ V
PIN
≤ V
DD33
+ 0.3V, FAULTBzn,
WDI/RESETB, WP Pins Only
l
±2 µA
t
SP
Pulse Width of Spike Suppressed FAULTBzn, CONTROLn Pins Only 10 µs
SDA, SCL Pins Only 98 ns
t
FAULT_MIN
Minimum Low Pulse Width for
Externally Generated Faults
110 ms
t
RESETB
Pulse Width to Assert Reset V
WDI/RESETB
≤ 1.5V
l
300 µs
t
WDI
Pulse Width to Reset Watchdog Timer V
WDI/RESETB
≤ 1.5V
l
0.3 200 µs