3

LT1319

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Threshold Transimpedance

100

µA Into Pin 11 (Note 5)

2

k

Ω

Threshold External Voltage

100

µA Into Pin 11, V (Pin 11)

0.8

0.9

1.2

V

Shutdown Input High Voltage

2

V

Shutdown Input Low Voltage

0.8

V

Shutdown Input High Current

V (Pin 14) = 2.4V

– 140

– 60

– 10

µA

Shutdown Input Low Current

V (Pin 14) = 0.4V

– 400

– 260

– 130

µA

Supply Current

V (Pin 14) = 2V

10

14

18

mA

Supply Current in Shutdown

V (Pin 14) = 0.8V, V (Pin 6) = V (Pin 8) = 0V

300

500

800

µA

ELECTRICAL C

C

HARA TERISTICS

0

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Preamp Input Offset Voltage

V (Pin 2) – V (Pin 5)

4

17

mV

Preamp Output Offset Voltage

V (Pin 4) – V (Pin 5)

10

27

mV

Preamp Loop Offset Voltage

V (Pin 3) – V (Pin 5)

30

150

350

mV

High Gain Loop Offset Voltage

V (Pin 9) – V (Pin 5)

400

800

1200

mV

Low Gain Loop Offset Voltage

V (Pin 7) – V (Pin 5)

400

800

1200

mV

Preamp Transimpedance

±10µA Into Pin 2, Measure ∆V (Pin 4)

8.5

15

18.5

k

Ω

Preamp Output Swing, Positive

100

µA Out of Pin 2, Measure ∆V (Pin 4)

0.2

0.4

0.6

V

Preamp Output Swing, Negative

100

µA Into Pin 2, Measure ∆V (Pin 4)

– 0.6

– 0.4

– 0.2

V

Preamp Loop Rejection, Positive

50

µA Into Pin 2, Measure ∆V (Pin 4)

– 3.5

– 1

3.5

mV

Preamp Loop Rejection, Negative

50

µA Out of Pin 2, Measure ∆V (Pin 4)

– 3.5

1

3.5

mV

Preamp Loop Output Current, Positive

100

µA Out of Pin 2, Measure I (Pin 3), (Note 1)

– 160

– 100

– 40

µA

Preamp Loop Output Current, Negative

100

µA Into Pin 2, Measure I (Pin 3), (Note 1)

40

100

160

µA

Bias Voltage

V (Pin 5)

1.5

1.9

2.3

V

Bypass Voltage

V (Pin 16)

4.7

4.9

4.97

V

Filter Buffer Input Bias Current

I (Pin 6), I (Pin 8)

0.05

0.5

1.6

µA

Gain Stage Loop Rejection, Positive

∆V = 50mV (Pin 6, Pin 8), Measure ∆V (Pin 7, Pin 9)

0.3

0.45

0.6

V

Gain Stage Loop Rejection, Negative

∆V = –50mV (Pin 6, Pin 8), Measure ∆V (Pin 7, Pin 9)

– 0.6

– 0.45

– 0.3

V

Fast Comparator Output High Voltage

∆V (Pin 9) = –200mV, 1mA Out of Pin 10 (Note 4)

2.4

3.5

V

Slow Comparator Output High Voltage

∆V (Pin 7) = –200mV, 0.1mA Out of Pin 13 (Note 4)

2.4

3.9

V

Fast Comparator Output Low Voltage

∆V (Pin 9) = 200mV, 800µA Into Pin 10

0.35

0.5

V

Slow Comparator Output Low Voltage

∆V (Pin 7) = 200mV, 800µA Into Pin 13

0.39

0.5

V

Threshold External Voltage

100

µA Into Pin 11, V (Pin 11)

0.7

0.9

1.3

V

Shutdown Input High Voltage

2

V

Shutdown Input Low Voltage

0.8

V

Shutdown Input High Current

V (Pin 14) = 2.4V

– 160

– 60

0

µA

Shutdown Input Low Current

V (Pin 14) = 0.4V

– 450

– 260

– 80

µA

Supply Current

V (Pin 14) = 2V

9

14

20

mA

Supply Current in Shutdown

V (Pin 14) = 0.8V, V (Pin 6) = V (Pin 8) = 0V

200

500

900

µA

Note 1: Measure V (Pin 3) without input current for Pin 2. Force Pin 3 to

this measured voltage (which disables the preamp loop). Measure the

current into and out of Pin 3 when Pin 2 is driven.

Note 2: The gain is the differential voltage at the comparator inputs divided

parameter is not tested.

Note 3: Hysteresis is the difference in comparator trip point measured

when the output is high and when the output is low. This parameter is

not tested.

Note 4: Measure V (Pin 7) and V (Pin 9). Force these voltages to 200mV

below their nominal value to switch the comparators high.

Note 5: The current into Pin 11 is multiplied by 4 and then applied to a

500

Ω resistor on the positive comparator inputs. The threshold is

I (Pin 11) • 4 • 500

Ω.