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AD5547/AD5557

3.0

2.5

LDAC (5V/DIV)

SUPPLY CURRENT (mA)

2.0

0x5555

1.5

0x8000

1.0

0xFFFF

0x0000

03810-0-012

V

DD

= 5V

V

REF

= 10V

CODES 0x8000

鈫?x7FFF

V

OUT

(50mV/DIV)

03810-0-015

0.5

0

10k

100k

1M

CLOCK FREQUENCY (Hz)

10M

100M

0

0.5

1.0

1.5

2.0

2.5

3.0

TIME (碌s)

3.5

4.0

4.5

5.0

Figure 12. AD5547 Supply Current vs. Clock Frequency

Figure 15. AD5547 Midscale Transition and Digital Feedthrough

90

80

70

60

PSRR (鈥揹B)

V

DD

= 5V

鹵

10%

V

REF

= 10V

50

40

30

20

04452-0-014

0xFFFF

0x8000

0x4000

0x2000

0x1000

0x0800

0x0400

0x0200

0x0100

0x0080

0x0040

0x0020

0x0010

0x0008

0x0004

0x0002

0x0001

0x0000

REF LEVEL

0.000dB

/DIV

12.000dB

MARKER 4 41 677.200Hz

MAG (A/R) 鈥?.939db

鈥?2dB

鈥?4dB

鈥?6dB

鈥?8dB

鈥?0dB

鈥?2dB

鈥?4dB

鈥?6dB

鈥?08dB

03810-0-016

10

0

10

100

1k

10k

FREQUENCY (Hz)

100k

1M

10

100

START 10.000Hz

1k

10k

100k

1M

10M

STOP 50 000 000.000Hz

Figure 13. Power Supply Rejection Ratio vs. Frequency

Figure 16. AD5547 Unipolar Reference Multiplying Bandwidth

0

鈥?2

1

REF LEVEL

0.000dB

ALL BITS ON

D15 AND D14 ON

D15 AND D13 ON

D15 AND D12 ON

D15 AND D11 ON

D15 AND D10 ON

D15 AND D9 ON

D15 AND D8 ON

D15 AND D7 ON

D15 AND D6 ON

D15 AND D5 ON

D15 AND D4 ON

D15 AND D3 ON

D15 AND D2 ON

D15 AND D1 ON

/DIV

12.000dB

LDAC

鈥?4

鈥?6

鈥?8

2

鈥?0

鈥?2

鈥?4

V

OUT

03810-0-014

鈥?6

鈥?08

D15 AND D0 ON

D15 ON

03810-0-017

CH1

5.00V CH2 2.00V

M 200ns

A CH1 2.70V

B CH1 鈥?.20V

400.00ns

Figure 14. Settling Time from Full Scale to Zero Scale

鈥?20

10

100

START 10.000Hz

1k

10k

100k

1M

10M

STOP 10 000 000.000Hz

Figure 17. AD5547 Bipolar Reference Multiplying Bandwidth (Codes from

Midscale to Full Scale)

Rev. 0 | Page 10 of 20

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