TLV5535

8-BIT, 35 MSPS, LOW-POWER ANALOG-TO-DIGITAL CONVERTER

SLAS221 – JUNE 1999

19

POST OFFICE BOX 655303

TLV5535 EVALUATION MODULE

TLV5535 EVM settings

clock input settings

REFERENCE

DESIGNATOR

FUNCTION

W1

Clock selection switch

1–2 J11: clock from pin1 on J11 connector

2–3 J9: clock from J9 SMA connector

W2

Clock source switch

J XTL: clock from onboard crystal oscillator

j CLK: clock from pin 1 on J11 connector (if W1/1–2) or J9 SMA connector (if W1/2–3)

NOTE: If set to XTL and a XTL oscillator is populated, no clock signal should be applied to J9 or J11, depending on the W1

setting.

W3

Clock output switch

1–2 Rising: clock output on J11 connector is the same phase as the clock to the digital output buffer. Data changes on rising

CLK edge.

2–3 Falling: clock output on J11 connector is the opposite phase as the digital output buffer. Data changes on falling CLK edge.

reference settings

REFERENCE

DESIGNATOR

FUNCTION

SW1

REFT external/internal switch

Jj REFT internal: REFT from TLV5535 internal reference

jJ REFT external: REFT from onboard voltage reference circuit

SW2

REFB external/internal switch

Jj REFB internal: REFB from TLV5535 internal reference

jJ REFB external: REFB from onboard voltage reference circuit

control settings

REFERENCE

DESIGNATOR

FUNCTION

W4

TLV5535 and digital output buffer output enable control (1)

J 5535-574 OE-connected: Connects OEs of TLV5535 and digital output buffer (574 buffer). Use this when no

board-external OE is used. In addition, close W5 to have both OEs permanently enabled.

j 5535-574 OE-disconnected: Disconnects OEs of TLV5535 and digital output buffer (574 buffer). The OE for the output

buffer needs to be pulled low from pin 5 on J11 connector to enable. The OE for TLV5535 is independently controlled from

pin 7 on J11 connector (W5 open) or is permanently enabled if W5 is closed.

W5

TLV5535 and digital output buffer output enable control (2)

J 5535 OE to GND: Connects OEs of TLV5535 to GND. Additionally connects OE of 74ALS574 to GND if W4 is 5535-574

OE-connected.

j 5535 OE external: Enables control of OE of TLV5535 via pin 7 on J11 connector. When taken high (internal pulldown)

the output can be disabled.

W6

TLV5535 STDBY control

J Stdby: STDBY is active (high).

j Active: STDBY is low, via internal pulldown. STDBY can be taken high from pin 9 on J11 connector to enable standby

mode.