AD9259 datasheet(23/52 Pages) AD

23 / 52 page

AD9259

Rev. 0 | Page 23 of 52

100

–100ps

–0ps

100ps

500

–500

–1.0ns

–0.5ns

0ns

0.5ns

1.0ns

EYE: ALL BITS

ULS: 10000/15600

Figure 50. Data Eye for LVDS Outputs in ANSI Mode with Trace Lengths Less

than 24 Inches on Standard FR-4

200

–200

–1.0ns

–0.5ns

0ns

0.5ns

1.0ns

EYE: ALL BITS

ULS: 9600/15600

100

–150ps –100ps

–50ps

–0ps

50ps

100ps

150ps

Figure 51. Data Eye for LVDS Outputs in ANSI Mode with Trace Lengths

Greater than 24 Inches on Standard FR-4

100

–150ps –100ps

–50ps

–0ps

50ps

100ps

150ps

200

400

–200

–400

–1.0ns

–0.5ns

0ns

0.5ns

1.0ns

EYE: ALL BITS

ULS: 9599/15599

Figure 52. Data Eye for LVDS Outputs in ANSI Mode with 100 Ω Termination

on and Trace Lengths Greater than 24 Inches on Standard FR-4

The format of the output data is offset binary by default. An

example of the output coding format can be found in Table 8.

If it is desired to change the output data format to twos

complement, see the Memory Map section.

Table 8. Digital Output Coding

Code

(VIN+) − (VIN−), Input

Span = 2 V p-p (V)

Digital Output Offset Binary

(D11 ... D0)

16383

+1.00

11 1111 1111 1111

8192

0.00

10 0000 0000 0000

8191

−0.000122

01 1111 1111 1111

−1.00

00 0000 0000 0000

Data from each ADC is serialized and provided on a separate

channel. The data rate for each serial stream is equal to 14 bits

times the sample clock rate, with a maximum of 700 Mbps

(14 bits × 50 MSPS = 700 Mbps). The lowest typical conversion

rate is 10 MSPS. However, if lower sample rates are required for

a specific application, the PLL can be set up for encode rates

lower than 10 MSPS via the SPI. This allows encode rates as low

as 5 MSPS. See the Memory Map section to enable this feature.

AD9259 Datasheet(PDF) 23 Page - Analog Devices

AD9259 Datasheet(HTML) 23 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

Datasheet Download

Link URL