REV. A

–3–

AD7716

Table I. Typical Usable Dynamic Range, RMS Noise and Filter Settling Time vs. Filter Cutoff Frequency

Programmed Cutoff

Output Update

Usable Dynamic

RMS Noise

Filter Settling Time to

Absolute Group

N

Frequency (Hz)

Rate (Hz)

Range (dB)

( V)

0.0007% FS (ms)

Delay (ms)

0

584

2232

99

21

1.35

0.675

1

292

1116

102

14

2.7

1.35

2

146

558

105

10

5.4

2.7

3

73

279

108

7

10.8

5.4

4

36.5

140

111

5

21.6

10.8

NOTE

Usable Dynamic Range is defined as the ratio of the rms full-scale reading (sine wave input) to the rms noise of the converter.

5%; AGND =

Parameter

(B Version)

Units

Conditions/Comments

ns min

SCLK Period

77

ns min

SCLK Width

30

ns min

TFS

Setup Time

20

ns min

SDATA Setup Time

10

ns min

SDATA Hold Time

20

ns min

TFS

Hold Time

NOTES

°C to ensure compliance. All input signals are specified with tr = tf = 5 ns (10% to 90% of 5 V) and timed from a voltage level of 1.6 V.

200

µA

+2.1V

TO

OUTPUT

PIN

1.6mA

50pF

Figure 1. Load Circuit for Access Time and Bus Relinquish Time

DB4

(DB12)

DB3

(DB11)

DB2

(DB10)

DB1

(DB9)

DB0

(DB8)

DB5

(DB13)

DB6

(DB14)

DB7

(DB15)

SCLK (I)

SDATA (I)

TFS (I)

Figure 2. Control Register Timing Diagram