TLV5580

8BIT, 80 MSPS LOW POWER A/D CONVERTER

SLAS205B − DECEMBER 1998 − REVISED OCTOBER 2003

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TLV5580 EVALUATION MODULE

TLV5580 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 TLV5580 internal reference

jJ REFT external: REFT from onboard voltage reference circuit

SW2

REFB external/internal switch

Jj REFB internal: REFB from TLV5580 internal reference

jJ REFB external: REFB from onboard voltage reference circuit

CONTROL SETTINGS

REFERENCE

DESIGNATOR

FUNCTION

W4

TLV5580 and digital output buffer output enable control (1)

J 5580-574 OE-connected: Connects OEs of TLV5580 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 5580-574OE-disconnected: Disconnects OEs of TLV5580 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 TLV5580 is independently controlled from pin 7 on

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

W5

TLV5580 and digital output buffer output enable control (2)

J 5580 OE to GND: Connects OEs of TLV5580 to GND. Additionally connects OE of 74ALS574 to GND if W4 is 5580-574

OE-connected.

j 5580 OE external: Enables control of OE of TLV5580 via pin 7 on J11 connector. When taken high (internal pulldown) the

output can be disabled.

W6

TLV5580 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.