Datasheet > AD8450-EVALZ

AD8450-EVALZ

更新时间： 2024-02-16 01:04:38

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
42页	1336K
描述
Precision Analog Front End and Controller

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中文翻译

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数据手册

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AD8450-EVALZ 数据手册

Precision Analog Front End and Controller

for Battery Test/Formation Systems

Data Sheet

AD8450

FEATURES

GENERAL DESCRIPTION

Integrated constant current and voltage modes with

automatic switchover

Charge and discharge modes

The AD8450 is a precision analog front end and controller for

testing and monitoring battery cells. A precision programmable

gain instrumentation amplifier (PGIA) measures the battery

charge/discharge current, and a programmable gain difference

amplifier (PGDA) measures the battery voltage (see Figure 1).

Internal laser trimmed resistor networks set the gains for the

PGIA and the PGDA, optimizing the performance of the

AD8450 over the rated temperature range. PGIA gains are 26,

66, 133, and 200. PGDA gains are 0.2, 0.27, 0.4, and 0.8.

Precision voltage and current measurement

Integrated precision control feedback blocks

Precision interface to PWM or linear power converters

Programmable gain settings

Current sense gains: 26, 66, 133, and 200

Voltage sense gains: 0.2, 0.27, 0.4, and 0.8

Programmable OVP and OCP fault detection

Current sharing and balancing

Excellent ac and dc performance

Maximum offset voltage drift: 0.6 µV/°C

Maximum gain drift: 3 ppm/°C

Low current sense amplifier input voltage noise: ≤9 nV/√Hz

Current sense CMRR: 126 dB minimum (gain = 200)

TTL compliant logic

Voltages at the ISET and VSET inputs set the desired constant

current (CC) and constant voltage (CV) values. CC to CV

switching is automatic and transparent to the system.

A TTL logic level input, MODE, selects the charge or discharge

mode (high for charge, low for discharge). An analog output,

VCTRL, interfaces directly with the Analog Devices, Inc.,

ADP1972 PWM controller.

The AD8450 includes resistor programmable overvoltage and

overcurrent detection and current sharing circuitry. Current

sharing is used to balance the output current of multiple

bridged channels.

APPLICATIONS

Battery cell formation and testing

Battery module testing

The AD8450 simplifies designs by providing excellent accuracy,

performance over temperature, flexibility with functionality,

and overall reliability in a space-saving package. The AD8450 is

available in an 80-lead, 14 mm × 14 mm × 1 mm LQFP package

and is rated for an operating temperature of −40°C to +85°C.

FUNCTIONAL BLOCK DIAGRAM

ISREFH/

ISREFL

IVE0/

ISET IVE1

ISMEA

VINT

AD8450

CSH

CURRENT

SHARING

ISVP

ISVN

CONSTANT

CURRENT LOOP

FILTER

GAIN

NETWORK

AND MUX

IMAX

26, 66,

133, 200

VCLP

VCTRL

VCLN

CURRENT

SENSE PGIA

1×

(CHARGE/

DISCHARGE)

SWITCHING

MODE

BVPx

VOLTAGE

SENSE PGDA

VOLTAGE

REFERENCE

VREF

GAIN

NETWORK

0.2, 0.27,

0.4, 0.8

CONSTANT

VOLTAGE LOOP

FILTER

FAULT

DETECTION

BVNx

FAULT

BVREFH/ BVMEA VSET VVE0/

VVP0 VSETBF VINT OVPS/ OCPS/

OVPR OCPR

BVREFL

VVE1

Figure 1.

Rev. B

Document Feedback

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rightsof third parties that may result fromits use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks andregisteredtrademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support

www.analog.com

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AD8451	ADI	获取价格	Low Cost, Precision Analog Front End and Controller for Battery Test/Formation Systems
AD8451_17	ADI	获取价格	Low Cost, Precision Analog Front End and Controller for Battery Test/Formation Systems
AD8451ASTZ	ADI	获取价格	Low Cost Precision Analog Front End and Controller for Battery Test/Formation Systems
AD8451ASTZ-RL	ADI	获取价格	Low Cost Precision Analog Front End and Controller for Battery Test/Formation Systems
AD8451-EVALZ	ADI	获取价格	Low Cost, Precision Analog Front End and Controller for Battery Test/Formation Systems
AD8452	ADI	获取价格	Precision Integrated Analog Front End, Controller
AD8452ASTZ	ADI	获取价格	Precision Integrated Analog Front End, Controller, and PWM for Battery Test and Formation
AD8452ASTZ-RL	ADI	获取价格	Precision Integrated Analog Front End, Controller
AD8452-EVALZ	ADI	获取价格	Precision Integrated Analog Front End, Controller
AD8456-A	COILCRAFT	获取价格	Telecom Transformer

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