AD620BN Equivalent & Substitute Parts

Part Overview

The AD620BN is an instrumentation amplifier manufactured by Analog Devices Inc., designed for single-circuit applications in 8-PDIP through-hole packaging. This device is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design requirements and production continuity. The AD620BN operates across a wide supply voltage range of 4.6 V to 36 V with an operating temperature range of -40°C to 85°C, making it suitable for industrial and precision measurement applications.

Key Parameters

Parameter	Value
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	15 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°C to 85°C
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)

Substitute Part Grouping Explanation

Substitution of the AD620BN is determined by the following critical parameters: amplifier type (instrumentation), number of circuits (1), package type (8-DIP through-hole), supply voltage range compatibility (minimum 4.6 V, maximum 36 V), and operating temperature range (-40°C to 85°C). Substitute parts are grouped into two categories based on packaging and electrical characteristics:

Category 1: Direct Package Equivalents (8-DIP Through-Hole) Parts maintaining identical 8-DIP through-hole packaging with compatible electrical specifications. These include the AD620BNZ (Analog Devices), INA111AP, INA111BP, INA114AP, INA114BP, INA118P, INA118PB, INA121P, and INA121PA (Texas Instruments).

Category 2: Alternative Package with Enhanced Performance (8-SOIC Surface Mount) The AD8422BRZ offers rail-to-rail output capability in 8-SOIC surface-mount packaging, suitable for applications requiring higher bandwidth and lower supply current, though mounting type differs from the original through-hole design.

Parameter Comparison

Part Number	Manufacturer	Amplifier Type	Number of Circuits	Slew Rate (V/µs)	-3dB Bandwidth (MHz)	Input Bias Current (pA)	Input Offset Voltage (µV)	Supply Current (µA)	Output Current / Channel (mA)	Supply Voltage Min (V)	Supply Voltage Max (V)	Operating Temperature (°C)	Package Type	Product Status
AD620BN	Analog Devices	Instrumentation	1	1.2	1	500	15	900	18	4.6	36	-40 to 85	8-DIP	Obsolete
AD620BNZ	Analog Devices	Instrumentation	1	1.2	1	500	15	900	18	4.6	36	-40 to 85	8-DIP	Active
AD8422BRZ	Analog Devices	Instrumentation	1	0.8	2.2	200	25	300	20	4.6	36	-40 to 85	8-SOIC	Active
INA111AP	Texas Instruments	Instrumentation	1	17	2	2	200	3300	30	12	36	-40 to 85	8-DIP	Active
INA111BP	Texas Instruments	Instrumentation	1	17	2	2	100	3300	30	12	36	-40 to 85	8-DIP	Active
INA114AP	Texas Instruments	Instrumentation	1	0.6	1	500	25	2200	20	4.5	36	-40 to 85	8-DIP	Active
INA114BP	Texas Instruments	Instrumentation	1	0.6	1	500	10	2200	20	4.5	36	-40 to 85	8-DIP	Active
INA118P	Texas Instruments	Instrumentation	1	0.9	0.8	1000	25	350	12	2.7	36	-40 to 85	8-DIP	Active
INA118PB	Texas Instruments	Instrumentation	1	0.9	0.8	1000	10	350	12	2.7	36	-40 to 85	8-DIP	Active
INA121P	Texas Instruments	Instrumentation	1	0.7	0.6	4	200	450	14	4.5	36	-40 to 85	8-DIP	Active
INA121PA	Texas Instruments	Instrumentation	1	0.7	0.6	4	300	450	14	4.5	36	-40 to 85	8-DIP	Active

Engineering Selection Recommendations

Primary Recommendation: AD620BNZ The AD620BNZ is the direct functional equivalent of the AD620BN, offering identical electrical specifications and 8-DIP through-hole packaging. The AD620BNZ maintains active product status with ROHS3 compliance and REACH unaffected certification, providing the most straightforward replacement path for obsolete AD620BN applications.

Secondary Recommendations: Texas Instruments INA Series (8-DIP Through-Hole) The INA114AP, INA114BP, INA121P, and INA121PA devices provide 8-DIP through-hole packaging compatible with existing PCB layouts. These parts are active products with ROHS3 compliance and REACH unaffected status. Selection among these alternatives depends on specific application requirements regarding slew rate, bandwidth, input bias current, and input offset voltage specifications.

Alternative Recommendation: AD8422BRZ (Surface Mount) The AD8422BRZ offers enhanced performance characteristics including lower supply current (300 µA versus 900 µA) and higher bandwidth (2.2 MHz versus 1 MHz), with rail-to-rail output capability. This device requires PCB redesign due to 8-SOIC surface-mount packaging and is suitable for applications prioritizing power efficiency and bandwidth performance. The AD8422BRZ maintains active product status with ROHS3 compliance and REACH unaffected certification.

Frequently Asked Questions (FAQ)

Q: Can the AD620BNZ be used as a direct replacement for the AD620BN? A: Yes. The AD620BNZ provides identical electrical specifications, supply voltage range (4.6 V to 36 V), operating temperature range (-40°C to 85°C), and 8-DIP through-hole packaging. The primary difference is product status: AD620BNZ is active while AD620BN is obsolete.

Q: What are the key differences between the AD620BN and INA114AP? A: Both devices are instrumentation amplifiers in 8-DIP through-hole packaging with 1 MHz bandwidth and 500 pA input bias current. The INA114AP has lower slew rate (0.6 V/µs versus 1.2 V/µs) and higher supply current (2.2 mA versus 900 µA). The INA114AP requires minimum 4.5 V supply versus 4.6 V for the AD620BN.

Q: Is the AD8422BRZ compatible with existing AD620BN PCB layouts? A: No. The AD8422BRZ uses 8-SOIC surface-mount packaging while the AD620BN uses 8-DIP through-hole packaging. PCB redesign is required for AD8422BRZ implementation. However, electrical specifications are compatible within the 4.6 V to 36 V supply range and -40°C to 85°C operating temperature.

Q: Which substitute part has the lowest power consumption? A: The AD8422BRZ has the lowest supply current at 300 µA, compared to 900 µA for the AD620BN. Among 8-DIP through-hole alternatives, the INA118P and INA118PB offer 350 µA supply current.

Q: Are all substitute parts ROHS3 compliant? A: The AD620BNZ and all Texas Instruments INA series parts listed are ROHS3 compliant. The AD8422BRZ is also ROHS3 compliant. All parts maintain REACH unaffected status.

Q: What is the minimum supply voltage requirement for each substitute? A: AD620BNZ requires 4.6 V minimum. INA114AP and INA114BP require 4.5 V minimum. INA121P and INA121PA require 4.5 V minimum. INA111AP and INA111BP require 12 V minimum. INA118P and INA118PB require 2.7 V minimum. AD8422BRZ requires 4.6 V minimum.

Q: Can INA111AP or INA111BP be used in low-voltage applications below 12 V? A: No. Both INA111AP and INA111BP require minimum 12 V supply voltage, making them unsuitable for applications operating below this threshold. Use INA118P, INA118PB, or AD620BNZ for lower voltage requirements.

Q: What is the bandwidth difference between AD620BN and its substitutes? A: AD620BN operates at 1 MHz bandwidth. INA111AP and INA111BP offer 2 MHz. AD8422BRZ offers 2.2 MHz. INA114AP and INA114BP offer 1 MHz. INA118P and INA118PB offer 800 kHz. INA121P and INA121PA offer 600 kHz.

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