Datasheet > ACPL-C797-000E

ACPL-C797-000E

更新时间： 2024-02-21 18:11:01

品牌	Logo	应用领域
安华高科 - AVAGO		光电二极管
页数	文件大小	规格书
16页	571K
描述
SPECIALTY ANALOG CIRCUIT, PDSO8, ROHS COMPLIANT, SSOP-8

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ACPL-C797-000E 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	包装说明：	SOP, SOP8,.45
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8541.40.80.00	Factory Lead Time：	22 weeks
风险等级：	5.57	Base Number Matches：	1

ACPL-C797-000E 数据手册

ACPL-C797

Optically Isolated Sigma-Delta Modulator

Data Sheet

Description

Features

• Superior Optical Isolation and Insulation

• 10 MHz internal clock

•ꢀ 1-bit, second-order sigma-delta modulator

•ꢀ 16 bits resolution no missing codes (1± bits ENOB)

•ꢀ 78 dB SNR

• ꢀ.5 µV/°C maximum oﬀset drift

•ꢀ ±1ꢁ gain error

•ꢀ Internal reference voltage

The ACPL-C797 is a 1-bit, second-order sigma-delta (Σ-∆)

modulator converts an analog input signal into a high-

speed data stream with galvanic isolation based on optical

coupling technology. The ACPL-C797 operates from a 5 V

power supply with dynamic range of 80 dB with an appro-

priate digital ﬁlter. The diﬀerential inputs of ±±00 mV (full

scale ±ꢀ±0 mV) are ideal for direct connection to shunt

resistors or other low-level signal sources in applications

such as motor phase current measurement.

•ꢀ ±±00 mV linear range with single 5 V supply (±ꢀ±0 mV

The analog input is continuously sampled by a means of

sigma-delta over-sampling using an on-board clock. The

signal information is contained in the modulator data, as a

density of ones with data rate of 10 MHz, and the data are

encoded and transmitted across the isolation boundary

where they are recovered and decoded into high-speed

data stream of digital ones and zeros. The original signal

information can be reconstructed with a digital ﬁlter. The

serial interface for data and clock has a wide supply range

of ꢀ V to 5.5 V.

full scale)

•ꢀ ꢀ V to 5.5 V wide supply range for digital interface

•ꢀ -40°C to +105°C operating temperature range

•ꢀ SSO-8 package

•ꢀ ±5 kV/µs common-mode transient immunity

•ꢀ Safety and regulatory approval:

– IEC/EN/DIN EN 60747-5-5: 1414 Vpeak working insu-

lation voltage

– UL 1577: 5000 Vrms/1min isolation voltage

– CSA: Component Acceptance Notice #5

Combined with superior optical coupling technology,

the modulator delivers high noise margins and excellent

immunity against isolation-mode transients. With 0.5

mm minimum distance through insulation (DTI), the

ACPL-C797 provides reliable reinforced insulation and

high working insulation voltage, which is suitable for

fail-safe designs. This outstanding isolation performance

is superior to alternatives including devices based on ca-

pacitive- or magnetic-coupling with DTI in micro-meter

range. Oﬀered in a Stretched SO-8 (SSO-8) package, the

isolated ADC delivers the reliability, small size, superior

isolation and over-temperature performance motor drive

designers need to accurately measure current at much

lower price compared to traditional current transducers.

Applications

•ꢀ Motor phase and rail current sensing

•ꢀ Power inverter current and voltage sensing

•ꢀ Industrial process control

•ꢀ Data acquisition systems

•ꢀ General purpose current and voltage sensing

•ꢀ Traditional current transducer replacements

Functional Block Diagram

V_DD1

V_DD2

The external clock version modulator ACPL-796J (SO-16

package) is also available.

Σ-∆

MCLK

V_IN

LED

DRIVER

MODULATOR/

ENCODER

DECODER

–

V_IN

MDAT

SHIELD

CLK

V_REF

GND1

GND2

Figure 1.

CAUTION: It is advised that normal static precautions be taken in handling and assembly

of this component to prevent damage and/or degradation which may be induced by ESD.

12 3 4 5 6 7...16

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