LTC2637

6

2637fb

LTC2637-LMI12/ LTC2637-LMI10/ LTC2637-LMI8/ LTC2637-LMX12/ LTC2637-LMX10/ LTC2637-LMX8/ LTC2637-LZ12/

SYMBOL PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Reference Input

Input Voltage Range

l

V

Resistance

l

120

160

200

kΩ

Capacitance

12

pF

Reference Current, Power-Down Mode

DAC Powered Down

l

0.005

1.5

μA

Reference Output

Output Voltage

l

1.24

1.25

1.26

V

Reference Temperature Coefficient

±10

ppm/°C

Output Impedance

0.5

kΩ

Capacitive Load Driving

10

μF

Short Circuit Current

2.5

mA

Digital I/O

Low Level Input Voltage (SDA and SCL)

(Note 14)

l

–0.5

V

High Level Input Voltage (SDA and SCL)

(Note 11)

l

V

Low Level Input Voltage on CAn

(n = 0, 1, 2)

See Test Circuit 1

l

V

High Level Input Voltage on CAn

(n = 0, 1, 2)

See Test Circuit 1

l

V

Resistance from CAn (n=0, 1,2)

See Test Circuit 2

l

10

kΩ

Resistance from CAn (n=0, 1,2)

to GND to Set CAn = GND

See Test Circuit 2

l

10

kΩ

Resistance from CAn (n=0, 1,2)

See Test Circuit 2

l

2MΩ

Low Level Output Voltage

Sink Current = 3mA

l

0

0.4

V

Output Fall Time

250

ns

Pulse Width of Spikes Suppressed

by Input Filter

l

050

ns

Input Leakage

l

±1

μA

I/O Pin Capacitance

(Note 8)

l

10

pF

Capacitive Load for Each Bus Line

l

400

pF

External Capacitive Load on Address

Pin CAn (n=0, 1,2)

l

10

pF