TS8388BCFS datasheet(15/57 Pages) ATMEL

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TS8388B

2144C–BDC–04/03

Notes:

1. Following pin numbers 37 (CLK), 40 (CLKB), 54 (V

IN) and 57 (VINB) have to be connected to GND through a 50Ω resistor as

close as possible to the package (50

Ω termination preferred option).

2. The common mode level of the output buffers is 1.2V below the positive digital supply.

For ECL compatibility the positive digital supply must be set at 0V (ground).

For LVDS compatibility (output common mode at +1.2V) the positive digital supply must be set at 2.4V.

If the subsequent LVDS circuitry can withstand a lower level for input common mode, it is recommended to lower the posi-

tive digital supply level in the same proportion in order to spare power dissipation.

Table 8. TS8388BF/TS8388BFS Pin Description (CQFP68 package)

Symbol

Pin number

Function

GND

5, 13, 27, 28, 34, 35, 36, 41, 42, 43, 50, 51,

52, 53, 58, 59

Ground pins.

To be connected to external ground plane.

VPLUSD

1, 2, 16, 17, 18, 68

Digital positive supply (0V for ECL compatibility, 2.4V for

LVDS compatibility).(2)

26, 29, 32, 33, 46, 47, 61

+5V positive supply.

VEE

30, 31, 44, 45, 48

-5V analog negative supply.

DVEE

8, 9, 10

-5V digital negative supply.

54(1), 55

In phase (+) analog input signal of the Sample and Hold

differential preamplifier.

VINB

56, 57(1)

Inverted phase (-) of analog input signal (VIN).

CLK

37(1), 38

In phase (+) ECL clock input signal. The analog input is

sampled and held on the rising edge of the CLK signal.

CLKB

39, 40(1)

Inverted phase (-) of ECL clock input signal (CLK).

D0, D1, D2, D3, D4,

D5, D6, D7

23, 21, 19, 14, 6, 3, 66, 64

In phase (+) digital outputs.

B0 is the LSB. B7 is the MSB.

D0B, D1B, D2B, D3B,

D4B, D5B, D6B, D7B

24, 22, 20, 15, 7, 4, 67, 65

Inverted phase (-) digital outputs.

B0B is the inverted LSB. B7B is the inverted MSB.

In phase (+) Out of Range Bit. Out of Range is high on the

leading edge of code 0 and code 256.

ORB

Inverted phase (+) Out of Range Bit (OR).

In phase (+) output of Data Ready Signal.

DRB

Inverted phase (-) output of Data Ready Signal (DR).

GORB

Gray or Binary select output format control pin.

- Binary output format if GORB is floating or VCC.

- Gray output format if GORB is connected at ground (0V).

GAIN

ADC gain adjust pin.

DIOD/DRRB

This pin has a double function (can be left open or grounded

if not used):

- DIOD: die junction temperature monitoring pin.

- DRRB: asynchronous data ready reset function.

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