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See Technical Specifications

ISO7221CD

Dual-channel, 1/1, 25-Mbps digital isolator

Manufacturer:

TI
Mfr.Part #:

ISO7221CD
Datasheet:

ISO7221CD Datasheet (PDF)
Pbfree Code:

Yes
Part Life Cycle Code:

Lifetime Buy
Pin Count:

8
Reach Compliance Code:

compliant
EDA/CAD Models:

Request Free CAD Models for ISO7221CD

Email: [email protected]

Skype: live:.cid.ab6b29428937b76

Tel: +852 95804164

ISO7221CD General Description

The ISO7220x and ISO7221x family devices are dual-channel digital isolators. To facilitate PCB layout, the channels are oriented in the same direction in the ISO7220x and in opposite directions in the ISO7221x. These devices have a logic input and output buffer separated by TI’s silicon-dioxide (SiO₂) isolation barrier, providing galvanic isolation of up to 4000 V_PK per VDE. Used in conjunction with isolated power supplies, these devices block high voltage and isolate grounds, as well as 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 every 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 small capacitance and resulting time constant provide fast operation with signaling rates available from 0 Mbps (DC) to 150 Mbps (The signaling rate of a line is the number of voltage transitions that are made per second expressed in the units bps). The A-option, B-option, and C-option devices have TTL input thresholds and a noise filter at the input that prevents transient pulses from being passed to the output of the device. The M-option devices have CMOS V_CC/2 input thresholds and do not have the input noise filter and the additional propagation delay.

The ISO7220x and ISO7221x family of devices require two supply voltages of 2.8 V (C-Grade), 3.3 V, 5 V, or any combination. All inputs are 5-V tolerant when supplied from a 2.8-V or 3.3-V supply and all outputs are 4-mA CMOS.

The ISO7220x and ISO7221x family of devices are characterized for operation over the ambient temperature range of –40°C to +125°C.

Key Features

1, 5, 25, and 150-Mbps Signaling Rate Options
- Low Channel-to-Channel Output Skew; 1-ns Max
- Low Pulse-Width Distortion (PWD); 1-ns Max
- Low Jitter Content; 1 ns Typ at 150 Mbps
50 kV/µs Typical Transient Immunity
Operates with 2.8-V (C-Grade), 3.3-V, or 5-V Supplies
4-kV ESD Protection
High Electromagnetic Immunity
–40°C to +125°C Operating Range
Typical 28-Year Life at Rated Voltage (see High-Voltage Lifetime of the ISO72x Family of Digital Isolators and Isolation Capacitor Lifetime Projection)
Safety-Related Certifications
- VDE Basic Insulation with 4000-V_PK V_IOTM, 560 V_PK V_IORM per DIN VDE V 0884-11:2017-01 and DIN EN 61010-1 (VDE 0411-1)
- 2500 V_RMS Isolation per UL 1577
- CSA Approved for IEC 60950-1 and IEC 62368-1

Specifications

Source Content uid	ISO7221CD	Pbfree Code	Yes
Part Life Cycle Code	Lifetime Buy	Pin Count	8
Reach Compliance Code	compliant	ECCN Code	EAR99
HTS Code	8542.39.00.01	Interface IC Type	INTERFACE CIRCUIT
JESD-30 Code	R-PDSO-G8	Moisture Sensitivity Level	1
Number of Channels	2	Number of Functions	1
Number of Terminals	8	Peak Reflow Temperature (Cel)	260
Surface Mount	YES	Technology	CMOS
Temperature Grade	AUTOMOTIVE	Terminal Finish	NICKEL PALLADIUM GOLD
Terminal Form	GULL WING	Terminal Position	DUAL
Time@Peak Reflow Temperature-Max (s)	30	Rating	Catalog
Integrated isolated power	No	Isolation rating	Basic
Number of channels	2	Forward/reverse channels	1 forward / 1 reverse
Default output	High	Data rate (max) (MBps)	25
Surge isolation voltage (VIOSM) (VPK)	4000	Transient isolation voltage (VIOTM) (VPK)	4000
Withstand isolation voltage (VISO) (Vrms)	2500	CMTI (min) (V/µs)	15000
Operating temperature range (°C)	-40 to 125	Supply voltage (max) (V)	5
Supply voltage (min) (V)	2.8	Propagation delay time (typ) (µs)	0.036
Current consumption per channel (DC) (typ) (mA)	4.3	Creepage (min) (mm)	4
Clearance (min) (mm)	4