ISO224B

The ISO224B is an electronic component from Texas Instruments. View the full ISO224B datasheet below including electrical characteristics, absolute maximum ratings.

Manufacturer

Texas Instruments

Pin Configuration

Pin Functions

Pin Functions

PIN	PIN	I/O
NO.	NAME	I/O
1	VCAP	-
2	IN	I
3	VDD1	-
4	GND1	-
5	GND2	-
6	OUTN	O
7	OUTP	O
8	VDD2	-

Electrical Characteristics

minimum and maximum specifications apply from TA = -55°C to +125°C, VDD1 = 4.5 V to 18 V, VDD2 = 4.5 V to 5.5 V, VIN = -12 V to 12 V, and RLOAD = 10 k Ω ; typical specifications are at TA = 25°C, and VDD1 = VDD2 = 5 V (unless otherwise noted)

PARAMETER	PARAMETER	TEST CONDITIONS	MIN	TYP	MAX	UNIT
ANALOG INPUT	ANALOG INPUT	ANALOG INPUT	ANALOG INPUT	ANALOG INPUT	ANALOG INPUT	ANALOG INPUT
V OS	Input offset voltage (1)	Initial, at T A = 25°C, IN = GND1, ISO224B	-5	±1	5	mV
V OS	Input offset voltage (1)	Initial, at T A = 25°C, IN = GND1, ISO224A	-50	±1	50	mV
TCV OS	Input offset voltage drift (1)	ISO224B	-15	±3	15	μV/°C
TCV OS	Input offset voltage drift (1)	ISO224A	-60	±12	60	μV/°C
C IN	Input capacitance	IN to GND1		2		pF
R IN	Input resistance	IN to GND1	1	1.25		M Ω
I IB	Input bias current	IN = GND1		±15		nA
TCI IB	Input bias current drift	IN = GND1		±30		pA/°C
e n	Input-referred noise density	ISO224B		3		μV/ √ Hz
e n	Input-referred noise density	ISO224A		4		μV/ √ Hz

Absolute Maximum Ratings

see (1)

		MIN	MAX	UNIT
Power-supply voltage	VDD1 to GND1	-0.3	26	V
Power-supply voltage	VDD2 to GND2	-0.3	6.5	V
Input voltage	IN to GND1 (2)	-15	15	V
Input current	Continuous, at IN pin (3)	-10	10	mA
Output voltage	OUTP, OUTN	GND2 - 0.3	VDD2 + 0.3	V
Temperature	Junction, T J		150	°C
Temperature	Storage, T stg	-65	150	°C

(2) Exposure to absolute-maximum-rated condition for extended periods may increase input leakage current.
(3) Limit the input current at IN pin to prevent permanent damage to the device. The IN pin is internally protected by a voltage clamp. See 图 42 for a typical current versus voltage characteristic curve of the input clamp.

Recommended Operating Conditions

over operating ambient temperature range (unless otherwise noted)

			MIN	NOM	MAX	UNIT
POWER SUPPLY	POWER SUPPLY	POWER SUPPLY	POWER SUPPLY	POWER SUPPLY	POWER SUPPLY	POWER SUPPLY
	High-side power supply	VDD1 to GND1	4.5	5	18	V
	Low-side power supply	VDD2 to GND2	4.5	5	5.5	V
ANALOG INPUT	ANALOG INPUT	ANALOG INPUT	ANALOG INPUT	ANALOG INPUT	ANALOG INPUT	ANALOG INPUT
V Clipping	Input voltage before clipping output (1)	IN to GND1	±13.8	±13.8	±13.8	V
V FSR	Specified linear input full-scale voltage (1)	IN to GND1	-12		12	V
TEMPERATURE RANGE	TEMPERATURE RANGE	TEMPERATURE RANGE	TEMPERATURE RANGE	TEMPERATURE RANGE	TEMPERATURE RANGE	TEMPERATURE RANGE
T A	Specified ambient temperature		-55	25	125	°C

Thermal Information

THERMAL METRIC (1)	THERMAL METRIC (1)	ISO224x DWV (SOIC) 8 PINS	UNIT
R θ JA	Junction-to-ambient thermal resistance	96.3	°C/W
R θ JC(top)	Junction-to-case (top) thermal resistance	36.9	°C/W
R θ JB	Junction-to-board thermal resistance	60.1	°C/W
ψ JT	Junction-to-top characterization parameter	16.9	°C/W
ψ JB	Junction-to-board characterization parameter	58.2	°C/W
R θ JC(bot)	Junction-to-case (bottom) thermal resistance	n/a	°C/W

Typical Application

The ISO224 enables high-precision measurement of ±10-V signals that are used in a harsh environment in a wide range of industrial applications. The high input resistance of the device simplifies the connection of its input to different sensors or other signal sources. The very low nonlinearity, AC and DC errors, and temperature drift make the ISO224 a robust, high-performance, isolated amplifier for applications where high voltage isolation is required. The differential output with a full-scale voltage of 4 V offers high immunity to noise and allows connection to a wide range of analog-to-digital converters (ADCs) powered on a 5-V nominal supply.

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
ISO224	Texas Instruments	—
ISO224A	Texas Instruments	—
ISO224ADWV	Texas Instruments	8-SOIC (0.295", 7.50mm Width)
ISO224ADWVR	Texas Instruments	8-SOIC (0.295", 7.50mm Width)
ISO224BDWV	Texas Instruments	8-SOIC (0.295", 7.50mm Width)
ISO224BDWVR	Texas Instruments	8-SOIC (0.295", 7.50mm Width)
ISO224X	Texas Instruments	—

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