ISO721 Status: ACTIVE

Single 100Mbps Digital Isolator

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Datasheet

3.3 V / 5 V High-Speed Digital Isolators (Rev. H) (PDF 781 KB) 33356 views
23 Jul 2009

	ISO721	ISO721M	ISO722	ISO722M
Number of Channels	1	1	1	1
Channel Configuration	1/0	1/0	1/0	1/0
Insulation Rating(VRMS)	2500	2500	2500	2500
Supply Voltage(s)(V)	3.3, 5	3.3, 5	3.3, 5	3.3, 5
Datarate(Mbps)	100	150	100	150
Input Noise Filter	Yes	None	Yes	None
Prop Delay(Max)(ns)	24	16	24	16
TTL/CMOS Input Threshold	TTL	CMOS	TTL	CMOS
Footprint	ADuM1100	ADuM1100	ADuM1100	ADuM1100
Rating	Catalog	Catalog	Catalog	Catalog
Operating Temp Range(Celsius)	-40 to 125	-40 to 125	-40 to 125	-40 to 125
Approx. Price (US$)	1.40 \| 1ku	1.45 \| 1ku	1.40 \| 1ku	1.45 \| 1ku
Pin/Package	8SOIC, 8SOP	8SOIC	8SOIC	8SOIC
Thermal Shutdown	No	No	No	No
	Samples	Samples	Samples	Samples
	Inventory	Inventory	Inventory	Inventory

Other qualified versions of ISO721

Version	Part Number	Definition
Automotive	ISO721-Q1	Q100 devices qualified for high-reliability automotive applications targeting zero defects

Customers Who Evaluated This Product Also Evaluated

ISO150: Dual, Isolated, Bi-Directional Digital Coupler
ISO7220A: Dual Channel, 2/0, 1Mbps Digital Isolator
ISO124: Precision Lowest Cost Isolation Amplifier
ISO122: Precision Lowest Cost Isolation Amplifier
TPS62110: Adjustable, 1.5-A, 17-V Vin Step-Down Converter in QFN-16

Product Information

Features

4000-V_(peak) Isolation, 560-V_peak V_IORM
- UL 1577, IEC 60747-5-2 (VDE 0884, Rev. 2)
  IEC 61010-1, IEC 60950-1 and CSA Approved
- 50 kV/µs Transient Immunity Typical
Signaling Rate 0 Mbps to 150 Mbps
- Low Propagation Delay
- Low Pulse Skew (Pulse-Width Distortion)
Low-Power Sleep Mode
High Electromagnetic Immunity
Low Input-Current Requirement
Failsafe Output
Drop-In Replacement for Most Opto and Magnetic Isolators
APPLICATIONS
- Industrial Fieldbus
  - Modbus
  - Profibus
  - DeviceNet Data Buses
  - Smart Distributed Systems (SDS)
- Computer Peripheral Interface
- Servo Control Interface
- Data Acquisition

⁽¹⁾ The signaling rate of a line is the number of voltage transitions that are made per second expressed in the units bps (bits per second).

Description

The ISO721, ISO721M, ISO722, and ISO722M are digital isolators with a logic input and output buffer separated by a silicon dioxide (SiO₂) insulation barrier. This barrier provides galvanic isolation of up to 400 V. Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuits from entering the local ground, and interfering with or damaging sensitive circuitry.

A binary input signal is conditioned, translated to a balanced signal, then differentiated by the capacitive isolation barrier. Across the isolation barrier, a differential comparator receives the logic transition information, then sets or resets a flip-flop and the output circuit accordingly. A periodic update pulse is sent across the barrier to ensure the proper dc level of the output. If this dc-refresh pulse is not received for more than 4 µs, the input is assumed to be unpowered or not being actively driven, and the failsafe circuit drives the output to a logic high state.

The symmetry of the dielectric and capacitor within the integrated circuitry provides for close capacitive matching, and allows fast transient voltage changes between the input and output grounds without corrupting the output. The small capacitance and resulting time constant provide for fast operation with signaling rates⁽¹⁾ from 0 Mbps (dc) to 100 Mbps for the ISO721/ISO722, and 0 Mbps to 150 Mbps with the ISO721M/ISO722M.

These devices require two supply voltages of 3.3-V, 5-V, or any combination. All inputs are 5-V tolerant when supplied from a 3.3-V supply and all outputs are 4-mA CMOS.

The ISO722 and ISO722M devices includes an active-low output enable that when driven to a high-logic level, places the output in a high-impedance state, and turns off internal bias circuitry to conserve power.

Both the ISO721 and ISO722 have TTL input thresholds and a noise-filter at the input that prevents transient pulses of up to 2 ns in duration from being passed to the output of the device.

The ISO721M and ISO722M have CMOS V_CC/2 input thresholds, but do not have the noise-filter and the additional propagation delay. These features of the ISO721M also provide for reduced jitter operation.

The ISO721, ISO721M, ISO722, and ISO722M are characterized for operation over the ambient temperature range of -40°C to 125°C.

Pricing / Packaging / CAD Design Tools / Samples

			Price	Packaging			CAD Design Tools		Samples
Device	Status	Temp (^oC)	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Symbols	Footprints	Samples
ISO721D	ACTIVE	-40 to 125	1.55 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE
ISO721DG4	ACTIVE	-40 to 125	1.55 \| 1ku	SOIC (D) \| 8	View	75 \| TUBE
ISO721DR	ACTIVE	-40 to 125	1.40 \| 1ku	SOIC (D) \| 8	View	2500 \| LARGE T&R	Purchase Samples
ISO721DRG4	ACTIVE	-40 to 125	1.40 \| 1ku	SOIC (D) \| 8	View	2500 \| LARGE T&R	Purchase Samples
ISO721DUB	ACTIVE	-40 to 125	1.40 \| 1ku	SOP (DUB) \| 8		50 \| TUBE			Purchase Samples
ISO721DUBR	ACTIVE	-40 to 125	1.40 \| 1ku	SOP (DUB) \| 8		350 \| LARGE T&R

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

	TI Inventory Status	Reported Distributor Inventory
ISO721D	As of 11:26 AM GMT, 03 Jul 2009	As of 11:26 AM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	8 Weeks	Americas	DigiKey	>1k
			Mouser Electronics	28
			Newark	221
			Rochester Electronics	39
		Europe	Arrow Northern Europe	75
			Avnet-SILICA	25
			Spoerle	20
ISO721DG4	As of 11:26 AM GMT, 03 Jul 2009	As of 11:26 AM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	8 Weeks	Americas	DigiKey	Available
		Americas	Mouser Electronics	125
		Europe	Farnell	304
ISO721DR	As of 11:26 AM GMT, 03 Jul 2009	As of 11:26 AM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	4 Weeks	Americas	Arrow	>1k
	4 Weeks	Americas	DigiKey	Available
ISO721DRG4	As of 11:26 AM GMT, 03 Jul 2009	As of 11:26 AM GMT, 03 Jul 2009
	Lead Time	Region	Company	In Stock	Purchase
	4 Weeks	Americas	DigiKey	Available
View all Distributors

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

	Product Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
ISO721D	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
ISO721DG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
ISO721DR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
ISO721DRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
ISO721DUB	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-4-260C-72 HR	View	View
ISO721DUBR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-4-260C-72 HR	View	View

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for ISO721

Datasheet

3.3 V / 5 V High-Speed Digital Isolators (Rev. H) (PDF 781 KB) 33356 views
23 Jul 2009

Application Notes

Thermal and Electrical Properties of Selected Packaging Materials (HTM 8 KB) 12840 views
04 Oct 2000 Read Abstract
Shelf-Life Evaluation of Lead-Free Component Finishes (HTM 8 KB) 25031 views
24 May 2004 Read Abstract
High-Voltage Lifetime of the ISO72x Family of Digital Isolators (HTM 8 KB) 1764 views
17 Jan 2006 Read Abstract
The ISO72x Family of High-Speed Digital Isolators (HTM 8 KB) 3445 views
11 Jan 2006 Read Abstract
ISO72X Digital Isolator Magnetic-Field Immunity (Rev. A) (HTM 8 KB) 2704 views
22 Feb 2006 Read Abstract
Digital Isolator Design Guide (HTM 8 KB) 1733 views
19 Dec 2008 Read Abstract

View Application Notes for Isolators

User Guides

ISO72XEVM (HTM 8 KB) 836 views
14 Jan 2006 Read Abstract

Solution Guides

Medical Update (PDF 185 KB) 5900 views
05 May 2006

Simulation Models

IBIS Model
- ISO721_35 IBIS Model (Multiple File Format) 276 views
  18 Jan 2006 Read Abstract
- ISO721_53 IBIS Model (Multiple File Format) 287 views
  18 Jan 2006 Read Abstract
- ISO721_5 IBIS Model (Multiple File Format) 294 views
  18 Jan 2006 Read Abstract
- ISO721_3 IBIS Model (Multiple File Format) 358 views
  18 Jan 2006 Read Abstract

Tools & Software

Name	Part #	Company	Tool / Software Type
ISO72x Evaluation Module	ISO72XEVM	Texas Instruments	Development Boards/EVMs

Part #	Name	Product Family	Comments
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ISO150	Dual, Isolated, Bi-Directional Digital Coupler	INTERFACE - ISOLATORS
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Isolated DC/DC Converter Selection Guide

ISO721 Status: ACTIVE

Single 100Mbps Digital Isolator

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