AD8450ASTZ datasheet(10/42 Pages) AD

10 / 42 page

Data Sheet

AD8450

Rev. B | Page 9 of 41

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

NOTES

1. NC = NO CONNECT.

RGP

RGPS

ISGP0

ISGP1S

ISGP1

ISGP0S

ISVP

ISGP2

ISGP3

RFBP

ISGN3

ISGN2

ISGN1S

ISGN1

ISGN0S

ISGN0

RGNS

RGN

ISVN

RFBN

VCTRL

VCLN

AVCC

VVE1

VINT

VCLP

VVE0

VVP0

VSET

DVCC

FAULT

DGND

OCPS

OCPR

VREF

OVPR

VSETBF

21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61

PIN 1

AD8450

TOP VIEW

(Not to Scale)

Figure 2. Pin Configuration

Table 4. Pin Function Descriptions

Pin No.

Mnemonic

Input/

Output1

Description

1, 20

ISVP, ISVN

Input

Current Sense Instrumentation Amplifier Positive (Noninverting) and Negative (Inverting) Inputs.

Connect these pins across the current sense shunt resistor.

2, 19

RGP, RGN

N/A

Current Sense Instrumentation Amplifier Gain Setting Pins. Connect these pins to the appropriate

resistor network gain pins to select the current sense gain (see Table 5).

3, 18

RGPS, RGNS

N/A

Kelvin Sense Pins for the Current Sense Instrumentation Amplifier Gain Setting Pins (RGP and RGN).

4, 6,

8, 9,

12, 13,

15, 17

ISGP0, ISGP1,

ISGP2, ISGP3,

ISGN3, ISGN2,

ISGN1, ISGN0

N/A

Current Sense Instrumentation Amplifier Resistor Network Gain Pins (see Table 5).

5, 7,

14, 16

ISGP0S, ISGP1S,

ISGN1S, ISGN0S

N/A

Kelvin Sense Pins for the ISGP0, ISGP1, ISGN1, and ISGN0 Pins.

10, 11

RFBP, RFBN

Output

Current Sense Preamplifier Positive and Negative Outputs.

21, 35

BVP3S, BVN3S

N/A

Kelvin Sense Pins for the Voltage Sense Difference Amplifier Inputs BVP3 and BVN3.

22, 23,

24, 25,

31, 32,

33, 34

BVP3, BVP2,

BVP1, BVP0,

BVN0, BVN1,

BVN2, BVN3

Input

Voltage Sense Difference Amplifier Inputs. Each input pair (BVPx and BVNx) corresponds to a

different voltage sense gain (see Table 6).

26, 42, 73

VREF

Output

Voltage Reference Output Pins. VREF = 2.5 V.

BVREFH

Input

Reference Input for the Voltage Sense Difference Amplifier. To level shift the voltage sense

difference amplifier output by approximately 5 mV, connect this pin to the VREF pin. Otherwise,

connect this pin to the BVREFL pin.

28, 75

AGND

N/A

Analog Ground Pins.

BVREFL

Input

Reference Input for the Voltage Sense Difference Amplifier. The default connection is to ground.

BVREFLS

N/A

Kelvin Sense Pin for the BVREFL Pin.

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