Part A
AD620BRZ-R7
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 2808 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Replacement verdict
Compatible functional replacement candidate
The AD620BRZ-R7 is a higher-grade variant of the AD620ARZ instrumentation amplifier, sharing the same pinout, package, and core function. The BRZ grade offers tighter gain error and lower offset voltage specifications, making it a functionally compatible upgrade candidate for the ARZ in precision signal-conditioning designs, provided the tighter grade tolerances are acceptable for the target application.
Package Type
High match
Pin Configuration
High match
Gain Error Grade
Validation required
Input Offset Voltage
Validation required
Parts at a glance
Part B
AD620ARZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 6931 PCS
- Package
- SOIC-8
- Series
- Amplificateurs linéaires - instruments, amplificateurs opérationnels, amplificateurs tampons
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD620ARZ | AD620BRZ-R7 | Why it matters |
|---|---|---|---|
| Input Offset Voltage (max) | 50 µV | 50 µV | Lower offset voltage reduces DC error at the output, critical for precision low-level signal amplification. |
| Input Offset Voltage Drift (max) | 0.6 µV/°C | 0.6 µV/°C | Drift determines offset stability over temperature; important for applications spanning wide temperature ranges. |
| Input Bias Current (max) | 1.0 nA | 1.0 nA | Low bias current minimizes errors when interfacing with high-impedance sources such as sensors. |
| Gain Error (max, G=1000) | 0.15% | 0.15% | Gain error affects accuracy of the amplified signal; tighter gain error improves measurement precision. |
| CMRR (min, G=1000) | 100 dB | 100 dB | High common-mode rejection suppresses interference and noise from the input signal environment. |
| Input Noise Voltage (1 kHz) | 9 nV/√Hz | 9 nV/√Hz | Low input noise preserves signal integrity for small-amplitude signals in precision instrumentation. |
| Bandwidth (G=1) | 1 MHz | 1 MHz | Bandwidth determines the maximum frequency the amplifier can handle without significant attenuation. |
| Supply Voltage Range | ±2.3 V to ±18 V | ±2.3 V to ±18 V | Wide supply range enables use in both battery-powered and industrial systems with varying rails. |
| Operating Temperature Range | -40°C to +85°C | -40°C to +85°C | Temperature range defines the environments where the part can reliably operate. |
| Package / Mounting | 8-SOIC (Surface Mount) | 8-SOIC (Surface Mount, Tape & Reel) | Package and packaging form affect PCB layout and assembly; tape-and-reel suits automated production lines. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD620BRZ-R7 | AD620ARZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | Instrumentation | Instrumentation |
| Number of Circuits | 1 | 1 |
| Slew Rate | 1.2V/µs | 1.2V/µs |
| -3 dB Bandwidth | 1 MHz | 1 MHz |
| Current - Input Bias | 500 pA | 500 pA |
| Voltage - Input Offset | 15 µV | 30 µV |
| Supply Current | 900µA | 900µA |
| Current - Output / Channel | 18 mA | 18 mA |
| Voltage - Supply Span(Min) | 4.6 V | 4.6 V |
| Voltage - Supply Span(Max) | 36 V | 36 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the main differences between the AD620ARZ and AD620BRZ-R7?
Both are AD620 instrumentation amplifiers in an 8-lead SOIC package. The AD620ARZ is the standard grade with a maximum input offset voltage of 125 µV, a maximum input offset drift of 1.0 µV/°C, and a minimum CMRR of 93 dB (G = 10). The AD620BRZ-R7 is the higher-grade B version, offering a maximum input offset voltage of 50 µV, a maximum offset drift of 0.6 µV/°C, and a minimum CMRR of 100 dB (G = 10). The "-R7" suffix indicates tape-and-reel packaging.
Are the AD620ARZ and AD620BRZ-R7 pin-compatible and functionally interchangeable?
Yes. Both devices are AD620 instrumentation amplifiers in the same 8-lead SOIC (R-8) package with identical pin functions (gain resistor pins, +IN, -IN, +VS, -VS, OUTPUT, REF). They are functionally interchangeable, but the AD620BRZ-R7 provides tighter offset voltage, lower offset drift, and higher guaranteed CMRR, which may matter in precision applications.
What is the gain-setting method for the AD620ARZ and AD620BRZ-R7?
Both devices set gain with a single external resistor Rg connected between pins 1 and 8, using the relation G = 1 + (49.4 kΩ / Rg). This gain equation and the internal 49.4 kΩ feedback resistors are common to both grades.
Do the AD620ARZ and AD620BRZ-R7 have the same supply voltage range and quiescent current?
Yes. Both operate from dual supplies of ±2.3 V to ±18 V (or a total single supply of 4.6 V to 36 V) and draw a maximum supply current of 1.3 mA. These specifications are common to the AD620 family across grades.
What is the difference in CMRR between the AD620ARZ and AD620BRZ-R7?
At G = 10, the AD620ARZ guarantees a minimum CMRR of 93 dB, while the AD620BRZ-R7 guarantees a minimum CMRR of 100 dB. The B grade therefore offers better common-mode rejection for precision measurement applications.
What does the "-R7" suffix on the AD620BRZ-R7 indicate?
The "-R7" suffix denotes tape-and-reel packaging (7-inch reel) for automated assembly. It does not change the electrical specifications of the AD620B grade device; the AD620ARZ is typically supplied in tube or standard packaging.
Can the AD620ARZ be replaced by the AD620BRZ-R7 in an existing design?
Yes, the AD620BRZ-R7 is a drop-in replacement for the AD620ARZ because both share the same package, pinout, gain equation, and supply range. The B grade offers equal or better offset, drift, and CMRR performance, so substitution is generally acceptable, though the design should be validated against the tighter B-grade specifications.