AD620AN Equivalent & Substitute Parts

Part Overview

The AD620AN is an instrumentation amplifier manufactured by Analog Devices Inc., housed in an 8-DIP through-hole package. This device integrates one instrumentation amplifier circuit with a slew rate of 1.2V/µs, -3dB bandwidth of 1 MHz, and operates across a supply voltage range of 4.6V to 36V. The AD620AN is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Active alternatives with identical or enhanced electrical characteristics are available from both Analog Devices and Texas Instruments product lines.

Key Parameters

Parameter	Value	Unit
Amplifier Type	Instrumentation	—
Number of Circuits	1	—
Slew Rate	1.2	V/µs
-3dB Bandwidth	1	MHz
Current - Input Bias	500	pA
Voltage - Input Offset	30	µV
Current - Supply	900	µA
Current - Output / Channel	18	mA
Voltage - Supply Span (Min)	4.6	V
Voltage - Supply Span (Max)	36	V
Operating Temperature	-40 to 85	°C
Mounting Type	Through Hole	—
Package / Case	8-DIP (0.300", 7.62mm)	—

Substitute Part Grouping Explanation

Substitution of the AD620AN is determined by strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Mandatory Matching Parameters:

Amplifier Type: Instrumentation
Number of Circuits: 1
Mounting Type: Through Hole
Package / Case: 8-DIP (0.300", 7.62mm)
Voltage - Supply Span: 4.6V minimum to 36V maximum
Operating Temperature: -40°C to 85°C

Electrical Performance Parameters (Allowable Equivalence):

Slew Rate: 1.2V/µs or greater
-3dB Bandwidth: 1 MHz or greater
Current - Input Bias: 500 pA or lower
Voltage - Input Offset: 30 µV or lower
Current - Supply: 900 µA or lower
Current - Output / Channel: 18 mA or greater

Substitute parts are grouped into two categories:

Direct Equivalent: AD620ANZ maintains identical electrical specifications and packaging, differing only in product status (Active vs. Obsolete) and packaging format (Tube).

Functional Equivalents: LT1167ACN8#PBF, LT1167IN8#PBF, LT1920CN8#PBF, LT1920IN8#PBF, and INA114AP meet or exceed all electrical performance criteria while maintaining through-hole 8-DIP packaging and compatible supply voltage ranges.

Similar Performance Alternatives: LT1168CN8#PBF, LT1168IN8#PBF, INA111AP, and INA111BP provide instrumentation amplification in 8-DIP packages with extended operating temperature ranges or enhanced performance characteristics, though with variations in specific parameters.

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	Bandwidth (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (µA)	Output Current (mA)	Supply Voltage Min (V)	Supply Voltage Max (V)	Temp Range (°C)	Package
AD620AN	Analog Devices	Obsolete	1.2	1	500	30	900	18	4.6	36	-40 to 85	8-DIP
AD620ANZ	Analog Devices	Active	1.2	1	500	30	900	18	4.6	36	-40 to 85	8-DIP
LT1167ACN8#PBF	Analog Devices	Active	1.2	1	50	15	900	—	4.6	36	0 to 70	8-DIP
LT1167IN8#PBF	Analog Devices	Active	1.2	1	50	15	900	—	4.6	36	-40 to 85	8-DIP
LT1168CN8#PBF	Analog Devices	Active	0.5	0.4	80	20	350	32	4.6	36	0 to 70	8-DIP
LT1168IN8#PBF	Analog Devices	Active	0.5	0.4	80	20	350	32	4.6	36	-40 to 85	8-DIP
LT1920CN8#PBF	Analog Devices	Active	1.2	1	500	30	900	—	4.6	36	0 to 70	8-DIP
LT1920IN8#PBF	Analog Devices	Active	1.2	1	500	30	900	27	4.6	36	-40 to 85	8-DIP
INA114AP	Texas Instruments	Active	0.6	1	500	25	2200	20	4.5	36	-40 to 85	8-DIP
INA111AP	Texas Instruments	Active	17	2	2	200	3300	30	12	36	-40 to 85	8-DIP
INA111BP	Texas Instruments	Active	17	2	2	100	3300	30	12	36	-40 to 85	8-DIP

Engineering Selection Recommendations

Direct Replacement (Identical Specifications): AD620ANZ is the direct active equivalent of AD620AN. Both parts maintain identical electrical characteristics, supply voltage ranges, and operating temperature specifications. AD620ANZ is recommended for designs requiring exact parameter matching with the obsolete AD620AN. This part carries RoHS3 compliance and REACH unaffected status.

Functional Equivalents (Matching Core Parameters with Extended Temperature Range): LT1920IN8#PBF provides identical electrical performance to AD620AN with extended operating temperature coverage (-40°C to 85°C). This part is suitable for applications requiring the full temperature range of the original device. LT1920IN8#PBF carries RoHS3 compliance and REACH unaffected status.

LT1167IN8#PBF offers superior input bias current (50 pA vs. 500 pA) and input offset voltage (15 µV vs. 30 µV) while maintaining identical slew rate, bandwidth, and supply voltage specifications. This part is suitable for applications where lower input bias current and offset voltage provide performance advantages. LT1167IN8#PBF carries RoHS3 compliance and REACH unaffected status.

Alternative Performance Profiles: LT1168IN8#PBF provides reduced supply current consumption (350 µA vs. 900 µA) and enhanced output current capability (32 mA vs. 18 mA), with trade-offs in slew rate (0.5V/µs vs. 1.2V/µs) and bandwidth (400 kHz vs. 1 MHz). This part is suitable for low-power applications where bandwidth and slew rate requirements are less stringent.

INA114AP (Texas Instruments) maintains 1 MHz bandwidth and 500 pA input bias current with reduced supply current (2.2 mA vs. 900 µA). This part is suitable for applications where lower supply current consumption is beneficial, though with slightly reduced slew rate (0.6V/µs vs. 1.2V/µs).

High-Performance Alternatives: INA111AP and INA111BP provide significantly enhanced slew rate (17V/µs) and bandwidth (2 MHz) with extremely low input bias current (2 pA). These parts require minimum supply voltage of 12V and are suitable for applications demanding high-speed instrumentation amplification. INA111BP offers superior input offset voltage (100 µV) compared to INA111AP (200 µV).

All recommended substitutes carry RoHS3 compliance and REACH unaffected status, ensuring regulatory compliance for new designs.

Frequently Asked Questions (FAQ)

Q: Can AD620ANZ be used as a direct replacement for AD620AN? A: Yes. AD620ANZ is the active equivalent of the obsolete AD620AN with identical electrical specifications, supply voltage range (4.6V to 36V), operating temperature range (-40°C to 85°C), and 8-DIP through-hole packaging. The only differences are product status (Active vs. Obsolete) and packaging format (Tube).

Q: What is the primary reason to substitute the AD620AN? A: The AD620AN is classified as obsolete. AD620ANZ provides the same functionality with active product status and improved availability. For new designs, active alternatives such as LT1920IN8#PBF or LT1167IN8#PBF are recommended.

Q: Can I use LT1167IN8#PBF instead of AD620AN? A: Yes, with the following considerations: LT1167IN8#PBF provides superior input bias current (50 pA vs. 500 pA) and input offset voltage (15 µV vs. 30 µV). Electrical performance is equivalent or better in all critical parameters. Both parts use 8-DIP through-hole packaging and operate across 4.6V to 36V supply voltage. Operating temperature range is -40°C to 85°C for both parts.

Q: What are the key differences between LT1920IN8#PBF and LT1167IN8#PBF? A: LT1920IN8#PBF matches AD620AN specifications exactly (500 pA input bias, 30 µV offset). LT1167IN8#PBF offers improved input characteristics (50 pA input bias, 15 µV offset). Both maintain 1.2V/µs slew rate and 1 MHz bandwidth. Selection depends on whether the application benefits from lower input bias current and offset voltage.

Q: Can I use INA114AP as a substitute? A: INA114AP is functionally compatible with AD620AN for most applications. Both maintain 1 MHz bandwidth and 500 pA input bias current. INA114AP has slightly reduced slew rate (0.6V/µs vs. 1.2V/µs) and higher supply current (2.2 mA vs. 900 µA). Both use 8-DIP through-hole packaging and operate across compatible supply voltage ranges. Verify slew rate requirements for your specific application.

Q: Are there surface-mount alternatives to the 8-DIP package? A: Yes. AD8422BRZ is available in 8-SOIC surface-mount package with rail-to-rail output, 2.2 MHz bandwidth, and 300 µA supply current. This part is suitable for applications where surface-mount technology and enhanced bandwidth are required, though it requires PCB redesign for package compatibility.

Q: What is the difference between LT1168CN8#PBF and LT1168IN8#PBF? A: Both parts have identical electrical specifications. The difference is operating temperature range: LT1168CN8#PBF operates 0°C to 70°C, while LT1168IN8#PBF operates -40°C to 85°C. Select LT1168IN8#PBF for applications requiring the full extended temperature range of the original AD620AN.

Q: Do all substitute parts have RoHS3 compliance? A: All active substitute parts listed (AD620ANZ, LT1167 series, LT1168 series, LT1920 series, INA111 series, INA114AP) carry RoHS3 compliance and REACH unaffected status, ensuring regulatory compliance for new designs.

Q: Can INA111AP or INA111BP replace AD620AN? A: INA111AP and INA111BP are high-performance alternatives with enhanced slew rate (17V/µs) and bandwidth (2 MHz). However, they require minimum supply voltage of 12V compared to AD620AN's 4.6V minimum. Use these parts only in applications where 12V minimum supply voltage is acceptable and high-speed performance is required.

Q: What packaging formats are available for AD620 equivalents? A: The primary packaging is 8-DIP through-hole (0.300", 7.62mm), available in all listed substitutes. AD8422BRZ provides an 8-SOIC surface-mount alternative (0.154", 3.90mm width) for applications requiring surface-mount technology.

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