AD8450ASTZ datasheet(10/41 Pages) AD

部件名	AD8450ASTZ

功能描述	Precision Analog Front End and Controller for Battery Test/Formation Systems

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制造商	AD [Analog Devices]

网页	http://www.analog.com

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10 / 41 page

AD8450

Data Sheet

Rev. B | Page 10 of 41

Pin No.

Mnemonic

Input/

Output1

Description

36, 61, 72

AVEE

N/A

Analog Negative Supply Pins. The default voltage is −5 V.

38, 57, 70

AVCC

N/A

Analog Positive Supply Pins. The default voltage is +25 V.

37

BVMEA

Output

Voltage Sense Difference Amplifier Output.

39

MODE

Input

TTL-Compliant Logic Input to Select the Charge or Discharge Mode. Low = discharge, high =

charge.

40

OVPS

Input

Noninverting Sense Input of the Overvoltage Protection Comparator.

41

OVPR

Input

Inverting Reference Input of the Overvoltage Protection Comparator. Typically, this pin connects

to the 2.5 V reference voltage (VREF).

43

OCPR

Input

Inverting Reference Input of the Overcurrent Protection Sense Comparator. Typically, this pin

connects to the 2.5 V reference voltage (VREF).

44

OCPS

Input

Noninverting Sense Input of the Overcurrent Protection Sense Comparator.

45

DGND

N/A

Digital Ground Pin.

46

FAULT

Output

Overvoltage or Overcurrent Fault Detection Logic Output (Active Low).

47

DVCC

N/A

Digital Supply. The default voltage is +5 V.

48, 52, 55,

63, 66

NC

N/A

No Connect. There are no internal connections to these pins.

49

VSET

Input

Target Voltage for the Voltage Sense Control Loop.

50

VSETBF

Output

Buffered Voltage VSET.

51

VVP0

Input

Noninverting Input of the Voltage Sense Integrator for Discharge Mode.

53

VVE0

Input

Inverting Input of the Voltage Sense Integrator for Discharge Mode.

54

VVE1

Input

Inverting Input of the Voltage Sense Integrator for Charge Mode.

56, 62

VINT

Output

Minimum Output of the Voltage Sense and Current Sense Integrator Amplifiers.

58

VCLN

Input

Low Clamp Voltage for VCTRL.

59

VCTRL

Output

Controller Output Voltage. Connect this pin to the input of the PWM controller (for example, the

COMP pin of the ADP1972).

60

VCLP

Input

High Clamp Voltage for VCTRL.

64

IVE1

Input

Inverting Input of the Current Sense Integrator for Charge Mode.

65

IVE0

Input

Inverting Input of the Current Sense Integrator for Discharge Mode.

67

ISET

Input

Target Voltage for the Current Sense Control Loop.

68

OAVO

Output

Output of the Uncommitted Operational Amplifier.

69

OAVN

Input

Inverting Input of the Uncommitted Operational Amplifier.

71

ISMEA

Output

Current Sense Instrumentation Amplifier Output.

74

ISREFH

Input

Reference Input for the Current Sense Amplifier. To level shift the current sense instrumentation

amplifier output by approximately 20 mV, connect this pin to the VREF pin. Otherwise, connect

this pin to the ISREFL pin.

76

ISREFL

Input

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

77

ISREFLS

N/A

Kelvin Sense Pin for the ISREFL Pin.

78

OAVP

Input

Noninverting Input of the Uncommitted Operational Amplifier.

79

IMAX

Output

Maximum Voltage of All Voltages Applied to the Current Sharing (CSH) Pin.

80

CSH

N/A

Current Sharing Bus.

1

N/A means not applicable.

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