Data Sheet

AD8488

Rev. A | Page 11 of 20

TYPICAL PERFORMANCE CHARACTERISTICS

0

0.05

CHANNEL NUMBER

100

90

80

70

60

50

10

40

30

20

130

120

110

G = 5V/V

CF1 = 0.9pF

TCASE = 30°C

CPANEL = 38pF

0.04

0.03

0.02

0.01

0

–0.01

–0.02

–0.03

–0.04

–0.05

Figure 4. Linearity Error vs. Channel

0

CHANNEL NUMBER

100

90

80

70

60

50

10

40

30

20

130

120

110

G = 10

CF1 = 0.9pF

TCASE = 40°C

CPANEL = 38pF

1100

900

1000

1200

1300

1400

1500

800

Figure 5. Input Referred Noise (QNI) vs. Channel, CPANEL = 38 pF, TCASE = 40°C

0

CHANNEL NUMBER

100

90

80

70

60

50

10

40

30

20

130

120

110

7

2

3

4

5

6

8

9

10

11

12

1

GAIN = 10

GAIN = 2

GAIN = 4

GAIN = 8

CF1 = 0.9pF

TCASE = 30°C

CPANEL= 38pF

VOUT = –104mV

Figure 6. Gain vs. Channel for Four Values of Gain

300

0

50

100

150

200

250

350

400

450

500

0

CHANNEL NUMBER

100

90

80

70

60

50

10

40

30

20

130

120

110

G = 1V/V

TCASE = 30°C

CPANEL= 38pF

VOUT = –104mV

CF1 = 0.45pF

CF1 = 0.9pF

CF1 = 3.5pF

CF1 = 7pF

Figure 7. CCR vs. Channel for Four Values of CF1

1100

0

850

900

950

1000

1050

1150

1200

1250

1300

800

TEMPERATURE (°C)

60

50

10

40

30

20

TYPICAL NOISE:

AVERAGE OF 128

CHANNELS

G = 10

CF1 = 0.9pF

CPANEL = 38pF

Figure 8. Input Referred Noise (QNI) vs. Temperature

0

0.004

CHANNEL NUMBER

100

90

80

70

60

50

10

40

30

20

130

120

110

TEMPERATURE

SPAN

0.003

0.002

0.001

0

–0.001

–0.002

–0.003

–0.004

G = 10V/V

CF1 = 0.9 pF

TCASE = 0°C TO 60°C

CPANEL = 38pF

VOUT = –104mV

0°C TO 20°C

0°C TO 40°C

0°C TO 60°C

Figure 9. Gain Drift vs. Channel for Various Temperature Spans