APPLICATION INFORMATION

1-Hz Rate

TL4050

Output Capacitor

SOT-23 Pin Connections

Use With ADCs or DACs

28

27

26

25

24

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9

8

1

2

3

4

5

6

7

AIN0

AIN1

AIN2

AGND

DB11

DB10

DB9

DB8

DB7

DB6

DB5

DGND

AIN3

2.2

µF

A1

A0

CLK

DB0

DB1

DB2

DB3

DB4

BUSY

WR

CS

RD

3.2-MHz Clock

BUSY Output

Write Input

Read Input

5-V Analog Supply

10

µF

+

+

+

0.1

µF

ADS7842

TL4050A-41

909

5 V

TL4050

Figure 1. Start-Up Test Circuit

The TL4050 does not require an output capacitor across cathode and anode for stability. However, if an output

bypass capacitor is desired, the TL4050 is designed to be stable with all capacitive loads.

There is a parasitic Schottky diode connected between pins 2 and 3 of the SOT-23 packaged device. Thus, pin 3

of the SOT-23 package must be left floating or connected to pin 2.

The TL4050x-41 is designed to be a cost-effective voltage reference as required in 12-bit data-acquisition

systems. For 12-bit systems operating from 5-V supplies, such as the ADS7842 (see Figure 2), the TL4050x-41

(4.096 V) permits operation with an LSB of 1 mV.

Figure 2. Data-Acquisition Circuit With TL4050x-41

16

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