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Typical operating characteristics (continued) – Rainbow Electronics MAX15031 User Manual

Page 6

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MAX15031

80V, 300mW Boost Converter and Current
Monitor for APD Bias Applications

6

_______________________________________________________________________________________

Typical Operating Characteristics (continued)

(V

PWR

= V

IN

= 3.3V, V

OUT

= 70V, circuit of Figure 3 (Figure 4 for V

IN

> 5.5V), unless otherwise noted.)

BIAS CURRENT

vs. APD CURRENT

MAX15031 toc17

APD CURRENT (mA)

BIAS CURRENT (mA)

1

0.1

0.01

0.001

0.1

1

10

0.01

0.0001

10

V

BIAS

= 70V

BIAS CURRENT

vs. TEMPERATURE

MAX15031 toc18

TEMPERATURE (

°C)

BIAS CURRENT (mA)

110

95

80

65

50

35

20

5

-10

-25

0.1

1

10

0.01

-40

125

I

APD

= 2mA

I

APD

= 500nA

GAIN ERROR

vs. APD CURRENT

MAX15031 toc19

I

APD

(

µA)

GAIN ERROR (%)

1000

100

10

1

-4

-3

-2

-1

0

1

2

3

4

5

-5

0.1

10,000

V

BIAS

= 70V

GAIN ERROR

vs. TEMPERATURE

MAX15031 toc20

TEMPERATURE (

°C)

GAIN ERROR (%)

110

95

-25 -10 5

35 50 65

20

80

-2.5

-2.0

-1.5

-1.0

-0.5

0

0.5

1.0

-3.0

-40

125

V

BIAS

= 70V

I

APD

= 500nA

I

APD

= 50

µA

I

APD

= 5

µA

I

APD

= 2mA

I

APD

= 500

µA

GAIN ERROR

vs. BIAS VOLTAGE

MAX15031 toc21

BIAS VOLTAGE (V)

GAIN ERROR (%)

70

60

20

30

40

50

-0.60

-0.40

-0.20

0

0.20

0.40

0.60

0.80

-0.80

10

80

I

APD

= 500nA

I

APD

= 50

µA

I

APD

= 5

µA

I

APD

= 2mA

I

APD

= 500

µA

APD TRANSIENT RESPONSE

MAX15031 toc22

20

µs/div

V

APD

AC-COUPLED
70V
2V/div

I

APD

2.5mA/div

I

MOUT

0.25mA/div

0mA

0mA

STARTUP DELAY

MAX15031 toc23

200

µs/div

V

BIAS

20V/div

I

MOUT

20nA/div

3V

0nA

I

APD

= 500nA