Data Sheet

AD5700/AD5700-1

Rev. A | Page 9 of 20

TYPICAL PERFORMANCE CHARACTERISTICS

Figure 3. Carrier Start Time

Figure 4. Carrier Stop/Decay Time

Figure 5. Carrier Detect On Timing

Figure 6. Carrier Detect Off Timing

Figure 7. Carrier Detect on When Switching from Transmit Mode to Receive

Mode in the Presence of a Constant Valid Carrier

Figure 8. Supply Currents vs. Supply Voltage—External Reference

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

–0.2

–0.4

–0.3

0

0.3

0.6

0.9

1.2

1.5

1.8

2.1

TIME (ms)

TXD

RTS

RTS AND TXD DC LEVELS HAVE BEEN ADJUSTED FOR

CLARITY. IN REALITY, BOTH OF THESE SIGNALS RANGE

FROM 0V TO 3.3V.

HART_OUT

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

–0.2

–0.4

–2.0

–1.5

–1.0

–0.5

0

0.5

1.0

TIME (ms)

TXD

RTS

HART_OUT

RTS AND TXD DC LEVELS HAVE BEEN ADJUSTED FOR

CLARITY. IN REALITY, BOTH OF THESE SIGNALS RANGE

FROM 0V TO 3.3V.

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

–0.2

–0.4

–0.5

0

0.5

1.0

1.5

2.0

2.5

TIME (ms)

RXD

CD

HART SIGNAL

CD AND RXD DC LEVELS HAVE BEEN ADJUSTED FOR

CLARITY. IN REALITY, BOTH OF THESE SIGNALS RANGE

FROM 0V TO 3.3V.

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

–0.2

–0.4

–5

–4

–3

–2

–1

0

1

TIME (ms)

RXD

CD

HART SIGNAL

CD AND RXD DC LEVELS HAVE BEEN ADJUSTED FOR

CLARITY. IN REALITY, BOTH OF THESE SIGNALS RANGE

FROM 0V TO 3.3V.

1.50

1.25

1.00

0.75

0.50

0.25

0

–0.50

–0.25

–0.75

–1.00

–10

–7.5

–5.0

–2.5

0

2.5

TIME (ms)

CD

HART_OUT

HART SIGNAL

RTS

RTS AND CD DC LEVELS HAVE BEEN ADJUSTED FOR

CLARITY. IN REALITY, BOTH OF THESE SIGNALS RANGE

FROM 0V TO 3.3V.

HART SIGNAL HAS ALSO

BEEN OFFSET BY –0.6V.

100

90

80

70

60

50

40

30

20

10

0

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

DEV 1 EXT REF