LTC2945

4

Rev. C

For more information www.analog.com

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

SUPPLIES

VDD

VDD Supply Voltage Range

l

4

80

V

VINTVCC

INTVCC Supply Voltage Range

l

2.7

5.9

V

IDD

VDD Supply Current

VDD = 48V, INTVCC Open

Shutdown

l

l

0.8

40

1.2

70

mA

µA

ICC

INTVCC Supply Current

INTVCC = VDD = 5V

Shutdown, INTVCC = VDD = 5V

l

l

0.6

20

0.9

80

mA

µA

ICCSRC

INTVCC Linear Regulator Output Current

VDD = 7V

l

–10

mA

VCC

INTVCC Linear Regulator Voltage

7V < VDD < 80V, ILOAD = 1mA (C-, I-Grade)

7V < VDD < 80V, ILOAD = 1mA (H-Grade)

l

l

4.5

4.5

5

5

5.5

5.7

V

V

ΔVCC

INTVCC Linear Regulator Load Regulation

7V < VDD < 80V, ILOAD = 1mA to 10mA

l

100

200

mV

VCCZ

INTVCC Shunt Regulator Voltage

VDD = 48V, ICC = 1mA

l

5.9

6.3

6.7

V

ΔVCCZ

INTVCC Shunt Regulator Load Regulation

VDD = 48V, ICC = 1mA to 35mA

l

250

mV

VCC(UVL)

INTVCC Supply Undervoltage Lockout

INTVCC Rising, VDD = INTVCC

l

2.2

2.6

2.69

V

VDD(UVL)

VDD Supply Undervoltage Lockout

VDD Rising, INTVCC Open (C-, I-Grade)

VDD Rising, INTVCC Open (H-Grade)

l

l

2.9

2.6

3.2

3.2

3.5

3.5

V

V

VDDI2C(RST)

VDD I2C Logic Reset

VDD Falling, INTVCC Open (C-, I-Grade)

VDD Falling, INTVCC Open (H-Grade)

l

l

2

1.7

2.5

2.5

V

V

VCCI2C(RST)

INTVCC I2C Logic Reset

INTVCC Falling, VDD = INTVCC

l

1.5

1.8

V

SENSE INPUTS

VCM

SENSE+, SENSE– Common Mode Voltage

l

0

80

V

ISENSE+(HI)

48V SENSE+ Input Current

SENSE+, SENSE–, VDD = 48V

Shutdown

l

l

100

150

2

µA

µA

ISENSE–(HI)

48V SENSE– Input Current

SENSE+, SENSE–, VDD = 48V

Shutdown

l

l

20

1

µA

µA

ISENSE+(LO)

0V SENSE+ Source Current

SENSE+, SENSE– = 0V VDD = 48V

Shutdown

l

l

–10

–2

µA

µA

ISENSE–(LO)

0V SENSE– Source Current

SENSE+, SENSE– = 0V, VDD = 48V

Shutdown

l

l

–5

±1

µA

µA

ADC

RES

Resolution (No missing codes)

(Note 5)

l

12

Bits

VFS

Full-Scale Voltage

ΔSENSE (Note 7)

VIN

ADIN

l

l

l

101.7

101.7

2.033

102.4

102.4

2.048

103.1

103.1

2.063

mV

V

V

LSB

LSB Step Size

ΔSENSE

VIN

ADIN

25

25

0.5

µV

mV

mV

TUE

Total Unadjusted Error (Note 6)

ΔSENSE

VIN

ADIN

l

l

l

±0.75

±0.75

±0.75

%

%

%

VOS

Offset Error

ΔSENSE

VIN

ADIN

l

l

l

±3.1

±1.5

±1.1

LSB

LSB

LSB

INL

Integral Nonlinearity

ΔSENSE

VIN

ADIN

l

l

l

±3

±2

±2

LSB

LSB

LSB

sT

Transition Noise (Note 5)

ΔSENSE

VIN

ADIN

1.2

0.3

10

µVRMS

mVRMS

µVRMS

The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VDD is from 4V to 80V unless otherwise noted. (Note 2)