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SERIAL PROGRAMMING INTERFACE

ADS5510

SLAS499 – JANUARY 2007

Table 8. Timing Characteristics at Additional Sampling Frequencies (DLL OFF)

CLKOUT Jitter,

CLKOUT, Rise Time

CLKOUT, Fall Time

Input-to-Output Clock Delay

Peak-to-Peak

fS

tr (ns)

tf (ns)

tPDI (ns)

tJIT (ps)

(MSPS)

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

80

2.5

2.8

2.1

2.3

210

315

7.1

8

8.9

65

3.1

3.5

2.6

2.9

260

380

7.8

8.5

9.4

40

4.8

5.3

4

4.4

445

650

9.5

10.4

11.4

20

8.3

9.5

7.6

8.2

800

1200

13

15.5

18

10

16

20.7

25.5

2

31

52

36

65

2610

4400

537

551

567

The ADS5510 has internal registers for the programming of some of the modes described in the previous

sections. The registers should be reset after power-up by applying a 2

µs (minimum) high pulse on RESET (pin

35); this also resets the entire ADC and sets the data outputs to low. This pin has a 200-k

Ω internal pullup

resistor to AVDD. The programming is done through a three-wire interface. The timing diagram and serial

register setting in the Serial Programing Interface section describe the programming of this register.

Table 2 shows the different modes and the bit values to be written to the register to enable them.

Note that some of these modes may modify the standard operation of the device and possibly vary the

performance with respect to the typical data shown in this data sheet.

Applying a RESET signal is must to set the internal registers to their default states for normal operation. If the

hardware RESET function is not used in the system, the RESET pin must be tied to ground and it is necessary

to write the default values to the internal registers through the serial programming interface. The registers must

be written in the following order.

Write 9000h (Address 9, Data 000)

Write A000h (Address A, Data 000)

Write B000h (Address B, Data 000)

Write C000h (Address C, Data 000)

Write D000h (Address D, Data 000)

Write E000h (Address E, Data 804)

Write 0000h (Address 0, Data 000)

Write 1000h (Address 1, Data 000)

Write F000h (Address F, Data 000)

NOTE:

This procedure is only required if a RESET pulse is not provided to the device.

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