®

DDC101

10

TYPICAL PERFORMANCE CURVES

ELECTRICAL

System Clock = 2MHz, V

S = ±5VDC, VREF = –2.5V, L = 1 Integration/Conversion, and TA = +25°C, unless otherwise noted.

SINAD AT 10kHz CONVERSION, UNIPOLAR INPUT

0

0

20

40

60

80

100

500 1000 1500 2000 2500 3000 3500 4000 4500 5000

0dB

–60dB

Input Frequency (Hz)

100µs Integration Time

K = 16 Acquisition Clocks

M = 32 Oversamples

SINAD AT 1kHz CONVERSION, UNIPOLAR INPUT

0

0

20

40

60

80

100

50

100

150

200

250

300

350

400

450

500

0dB

–60dB

Input Frequency (Hz)

1ms Integration Time

K = 16 Acquisition Clocks

M = 128 Oversamples

NOISE vs INPUT LEVEL (UNIPOLAR) WITH CDS

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

Input Level of FS

18

16

14

12

10

8

6

4

2

0

C

IN = 500pF

C

IN = 100pF

C

IN = 0pF

1ms Integration Time

K = 16 Acquisition Clocks

M = 128 Oversamples

NOISE vs INPUT LEVEL (UNIPOLAR) WITHOUT CDS

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

Input Level of FS

18

16

14

12

10

8

6

4

2

0

C

IN = 500pF

C

IN = 100pF

1ms Integration Time

M = 128 Oversamples

C

IN = 0pF

NOISE vs RESISTOR VALUE

1000

100

10

1

0.01

0.1

1

10

100

1G

R

IN (MΩ)

100µs Int., M = 16 O/S

1ms Int., M = 128 O/S

Low Level, Unipolar Input

K = 16 Acquisition Clocks

CHARGE INJECTION vs INPUT CAPACITANCE

350

300

250

200

150

100

50

0

–50

0

100

200

500

1000

C

IN (pF)

No CDS

CDS On, K = 16