ADR420/ADR421/ADR423/ADR425

Rev. I | Page 8 of 24

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

NIC = NO INTERNAL CONNECTION

TP = TEST PIN (DO NOT CONNECT)

ADR420/

ADR421/

ADR423/

ADR425

TOP VIEW

(Not to Scale)

TP

8

NIC

7

6

TRIM

5

Figure 2. 8-Lead SOIC, 8-Lead MSOP Pin Configuration

Table 8. Pin Function Descriptions

Pin No.

Mnemonic

Description

1, 8

TP

Test Pin. There are actual connections in TP pins, but they are reserved for factory testing purposes. Users should not

connect anything to TP pins; otherwise, the device may not function properly.

2

Input Voltage.

3, 7

NIC

No Internal Connect. NICs have no internal connections.

4

GND

Ground Pin = 0 V.

5

TRIM

Trim Terminal. It can be used to adjust the output voltage over a ±0.5% range without affecting the temperature

coefficient.

6

Output Voltage.