Part A
AD820BRZ
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5309 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Replacement verdict
Not a drop-in replacement
The AD820BRZ and AD8202YRZ-RL are not drop-in replacements for one another. The AD820BRZ is a single-channel, general-purpose precision operational amplifier in an SOIC-8 package, while the AD8202YRZ-RL is a dedicated high-voltage, bidirectional current-sense amplifier in an SOIC-8 package with a fixed gain of 20 V/V and a differential input structure. Their differing amplifier architectures, input topologies, and gain configurations mean the two devices serve fundamentally different signal-chain functions and cannot be interchanged without circuit redesign.
Different amplifier function
Different input topology
Different gain configuration
Different application role
Parts at a glance
Part B
AD8202YRZ-RL
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 6150 PCS
- Package
- SOIC-8
- Series
- Linear - Amplifiers - Instrumentation, OP Amps, Buffer Amps
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD820BRZ | AD8202YRZ-RL | Why it matters |
|---|---|---|---|
| Amplifier Type | Single, precision, low power, JFET input operational amplifier | Single, high voltage, precision difference amplifier | The two parts are fundamentally different amplifier topologies; a difference amplifier is not a drop-in replacement for a general-purpose op-amp in most circuits. |
| Number of Channels | 1 | 1 | Both are single-channel devices, so channel count alone does not differentiate them for substitutability. |
| Supply Voltage Range | 4.5 V to 36 V (single supply) | 3.5 V to 12 V (single supply) | The AD8202 operates at lower maximum supply, so it cannot be used in circuits requiring the higher voltage range of the AD820BRZ. |
| Input Offset Voltage (max) | 0.8 mV (B grade) | 1 mV | Offset voltage directly affects DC accuracy; the AD820BRZ offers slightly tighter offset for precision signal chains. |
| Input Bias Current (typ) | 2 pA (JFET input) | ~1 nA (bipolar input) | The JFET input of the AD820BRZ provides far lower bias current, critical for high-impedance sensor and precision applications. |
| Gain Bandwidth Product | 1.9 MHz | ~1 MHz (fixed gain difference amp) | Bandwidth affects signal fidelity; the AD820BRZ supports wider closed-loop bandwidth in general-purpose amplification. |
| Input Configuration | Standard op-amp inputs (IN+ / IN-) | Difference amplifier with integrated precision resistors | The AD8202 includes on-chip gain-setting resistors for differential measurement, whereas the AD820BRZ requires external feedback networks. |
| Package | 8-lead SOIC (RZ) | 8-lead SOIC (RZ) | Identical package footprint allows board-level interchangeability, though electrical differences remain. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +125 °C | The AD8202 supports a wider temperature range, making it suitable for harsher environments where the AD820BRZ may not be rated. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD820BRZ | AD8202YRZ-RL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Part Status | Active | Active |
| Amplifier Type | J-FET | Differential |
| Number of Circuits | 1 | 1 |
| Slew Rate | 3V/µs | 0.28V/µs |
| Gain Bandwidth Product | 1.9 MHz | 50 kHz |
| Current - Input Bias | 2 pA | 40 nA |
| Voltage - Input Offset | 300 µV | 1 mV |
| Supply Current | 700µA | 250µA |
| Voltage - Supply Span(Min) | 5 V | 3.5 V |
| Voltage - Supply Span(Max) | 36 V | 12 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Output Type | Rail-to-Rail | - |
| Current - Output / Channel | 20 mA | - |
Frequently asked questions
What are the fundamental differences between the AD820BRZ and the AD8202YRZ-RL?
The AD820BRZ is a single-channel, precision, low-power JFET-input operational amplifier in an 8-lead SOIC package. The AD8202YRZ-RL is a high common-mode voltage difference amplifier (also in an 8-lead SOIC) designed for current-sensing applications. They are functionally different devices and are not interchangeable.
Are the AD820BRZ and AD8202YRZ-RL pin-compatible?
No. Although both are 8-lead SOIC packages, their pin functions differ. The AD820BRZ uses the standard single op-amp pinout (offset null, inputs, supply, output), while the AD8202YRZ-RL uses a difference-amplifier pinout (e.g., +IN, -IN, REF, OUT, V+, V-). A direct drop-in replacement is not possible.
What are the typical supply voltage ranges for these two parts?
The AD820BRZ operates from a single supply of 5 V to 36 V or a dual supply of ±2.5 V to ±18 V. The AD8202YRZ-RL operates from a single supply of 4.5 V to 36 V. Both support a broad industrial supply range, but the AD8202 is specified for single-supply current-sense operation.
Which part is intended for current-sensing applications?
The AD8202YRZ-RL is the current-sense difference amplifier, featuring a high common-mode input voltage range and a fixed gain of 20 V/V, making it suitable for high-side current sensing. The AD820BRZ is a general-purpose precision op-amp and is not a dedicated current-sense amplifier.
How do the input offset voltage specifications compare?
The AD820BRZ is specified with a low input offset voltage (typically 100 µV maximum for the B grade). The AD8202YRZ-RL is specified with an input offset voltage in the millivolt range (typically ±1 mV maximum). The AD820BRZ offers tighter offset performance for precision signal conditioning.
Can the AD820BRZ be used as a direct substitute for the AD8202YRZ-RL in a current-sense circuit?
No. The AD8202YRZ-RL integrates a precision resistor network to form a fixed-gain difference amplifier with a high common-mode input range, whereas the AD820BRZ is a discrete op-amp requiring external resistors. Substitution would require a complete redesign of the current-sense front end and is not a drop-in replacement.
What are the operating temperature ranges for both devices?
Both the AD820BRZ and the AD8202YRZ-RL are specified for the industrial temperature range of −40 °C to +85 °C. This makes both suitable for industrial and automotive-adjacent signal-conditioning environments within that range.