TC7116A View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

TC7116A

3-1/2 Digit Analog-to-Digital Converters with Hold

Microchip Technology 

5.0 TC7117/TC7117A POWER

SUPPLIES

The TC7117/TC7117A are designed to operate from

±5V supplies. However, if a negative supply is not avail-

able, it can be generated with a TC7660 DC-to-DC con-

verter and two capacitors. Figure 5-1 shows this

application.

In selected applications, a negative supply is not

required. The conditions for using a single +5V supply

are:

1. The input signal can be referenced to the center

of the Common mode range of the converter.

2. The signal is less than ±1.5V.

3. An external reference is used.

+5V

35

V+ VREF+ 36

LED

Drive

32

TC7117 COM

TC7117A

VIN+

31

+

8

VIN- 30

VIN

–

2

21

+

10μF

TC7660

4

V- GND

5 (-5V) 26

3+

10μF

FIGURE 5-1:

Negative Power Supply

Generation with TC7660

TC7116/A/TC7117/A

 2002-2012 Microchip Technology Inc.

DS21457D-page 13

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