7 Detailed Description

7.1 Overview

The TLV3604 and TLV3605 are 800 ps propagation delay and 3.0 Gbps (1.5 GHz) comparators with LVDS

output. The TLV3604 is ideally suited for time-of-light application, while TLV3605 is ideal for signal rectification

and restoration with enhanced features. The TLV3604 is in the 6-pin SC-70 and TLV3605 is in 12-pin QFN

package.

7.2 Functional Block Diagram

LVDS

+

±

TLV3605

SHDN

LVDS

V

EE

+

±

TLV3604

LE/HYS

7.3 Feature Description

The TLV3604 and TLV3605 are single channel, high speed with a typical propagation delay of 800 ps, LVDS

output comparators. The minimum pulse width detection capability is 800 ps and the typical toggle rate is 3.0

Gbps. These comparators are ideal for time-of-flight as well as signal rectification type of applications. The rail-

to-rail input stage capable of operating up to 200 mV beyond each power supply rail combined with a maximum

5 mV input offset without hysteresis gives 61 dB input dynamic range over the entire temperature range. The

TLV3605 also provides shutdown enable and adjustable hysteresis controls. An external resistor can be used to

configure the input hysteresis, making it immune to noisy environment.

7.4 Device Functional Modes

The TLV3604 has a single functional mode and is operational when the power supply voltage is greater than

2.3V. The TLV3605 has active mode and shutdown mode when power supply voltage is greater than 2.3 V. The

TLV3605 is in shutdown mode when the SHDN pin is less than 0.4 V and is in active mode when SHDN pin is

greater than 1.5 V. The SHDN is 1.8 V logic compliant and independent of power supply.

7.4.1 Rail-to-Rail Inputs

The TLV3604 and TLV3605 feature an input stage capable of operating 0 –200 mV below negative power supply

(ground) and 200 mV beyond the positive supply voltage, allowing for zero cross detection and maximizing input

dynamic range given a certain power supply. 5 mV maximum input offset without internal hysteresis in TLV3604

allows high sensitivity signal detection.

7.4.2 LVDS Output

The TLV3604 and TLV3605 output are LVDS compliant. When the input of the downstream device is terminated

with a 100 Ω resistor, it provides a ±350 mV LVDS swing. Fully differential outputs enable fast digital toggling and

reduce EMI compared to single-ended output standard.

TLV3604

SNOSDA2A – AUGUST 2020 – REVISED AUGUST 2020

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8

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