Part A
AD820BRZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5309 ПКС
- Package
- SOIC-8
- Series
- Линейные - Усилетели - Приборы, ОП Усилетели, Буферные Усилетели
Replacement verdict
Not a drop-in replacement
The AD820BRZ and AD8206WHRZ are not functionally interchangeable. The AD820BRZ is a general-purpose precision operational amplifier, while the AD8206WHRZ is a dedicated high-voltage current-sense amplifier with a fixed gain of 20 V/V. Their differing architectures, input common-mode ranges, gain configurations, and package options make direct substitution impractical without circuit redesign.
Different amplifier function
Different gain configuration
Different input common-mode range
Different package and pinout
Parts at a glance
Part B
AD8206WHRZ
Компания Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4749 ПКС
- Package
- SOIC-8
- Series
- Линейные - Усилетели - Приборы, ОП Усилетели, Буферные Усилетели
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 | AD8206WHRZ | Why it matters |
|---|---|---|---|
| Amplifier Type | Single-Supply Operational Amplifier (JFET input) | Current Sense Amplifier | The two parts serve fundamentally different functions; a general-purpose op-amp cannot directly replace a dedicated current-sense amplifier in shunt measurement circuits. |
| Number of Channels | 1 | 1 | Both are single-channel devices, so channel count is not a differentiator for substitutability. |
| Supply Voltage Range | 4.5 V to 36 V (single supply) | 4.5 V to 5.5 V | The AD8206WHRZ is restricted to a 5 V nominal supply, while the AD820BRZ tolerates much higher supply voltages, limiting where each can be used. |
| Input Offset Voltage (max) | 0.8 mV | 2 mV | Lower offset improves DC accuracy; the AD820BRZ offers tighter offset, which matters for precision signal conditioning. |
| Gain Configuration | User-configurable (external resistors) | Fixed gain of 20 V/V | A fixed gain of 20 makes the AD8206WHRZ application-specific, whereas the AD820BRZ gain can be set by the designer, affecting direct substitution. |
| Input Bias Current (typ) | 2 pA (JFET input) | -2 µA to +2 µA range (bipolar) | Extremely low JFET input bias current in the AD820BRZ suits high-impedance sources, while the AD8206WHRZ bipolar input draws more current. |
| Gain Bandwidth Product | 1.8 MHz | Not applicable (fixed gain, ~100 kHz bandwidth) | The AD820BRZ provides wider small-signal bandwidth for general amplification, while the AD8206WHRZ bandwidth is set by its fixed-gain architecture. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +125 °C | The AD8206WHRZ supports a wider automotive/industrial temperature range, which can be critical in harsh environments. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Identical package and pin count simplify board-level replacement, though pin functions differ between the two devices. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD820BRZ | AD8206WHRZ |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Analog Devices Inc. |
| Series | - | Automotive |
| Part Status | Active | Active |
| Amplifier Type | J-FET | Differential |
| Number of Circuits | 1 | 1 |
| Slew Rate | 3V/µs | 0.5V/µs |
| -3 dB Bandwidth | - | 100 kHz |
| Voltage - Input Offset | 300 µV | 2 mV |
| Supply Current | 700µA | 2mA |
| Voltage - Supply Span(Min) | 5 V | 4.5 V |
| Voltage - Supply Span(Max) | 36 V | 5.5 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
| Output Type | Rail-to-Rail | - |
| Gain Bandwidth Product | 1.9 MHz | - |
| Current - Input Bias | 2 pA | - |
| Current - Output / Channel | 20 mA | - |
Frequently asked questions
What are the fundamental differences between the AD820BRZ and the AD8206WHRZ?
The AD820BRZ is a single-channel, precision, low-power JFET-input operational amplifier, whereas the AD8206WHRZ is a single-channel, high common-mode voltage difference amplifier. They serve different functional roles: the AD820BRZ is a general-purpose op amp, while the AD8206WHRZ is a specialized current-sense amplifier.
Are the AD820BRZ and AD8206WHRZ pin-compatible or interchangeable?
No. The AD820BRZ is supplied in an 8-lead SOIC package, and the AD8206WHRZ is supplied in an 8-lead SOIC package, but their pin functions and internal circuit topologies differ. The AD820BRZ is a standard op amp pinout, while the AD8206WHRZ has dedicated input, reference, and output pins for difference amplification. They are not direct substitutes.
What are the key electrical specifications of the AD820BRZ?
The AD820BRZ is a single-supply JFET-input op amp featuring a typical input bias current of 2 pA, a typical input offset voltage of 100 µV, a gain bandwidth product of 1.8 MHz, and a slew rate of 3 V/µs. It operates from a single supply of 5 V to 36 V or dual supplies of ±2.5 V to ±18 V.
What are the key electrical specifications of the AD8206WHRZ?
The AD8206WHRZ is a high common-mode voltage difference amplifier with a fixed gain of 20 V/V. It features a common-mode voltage range of −2 V to +65 V, a typical input offset voltage of 1 mV, a typical CMRR of 80 dB, and a bandwidth of 100 kHz. It operates from a single supply of 4.5 V to 5.5 V.
What are the typical applications for the AD820BRZ versus the AD8206WHRZ?
The AD820BRZ is typically used in precision signal conditioning, active filters, photodiode amplification, and general-purpose instrumentation. The AD8206WHRZ is specifically designed for high-side current sensing in motor control, power management, and automotive systems where high common-mode voltages are present.
Do the AD820BRZ and AD8206WHRZ share the same operating temperature range?
Yes. Both the AD820BRZ and the AD8206WHRZ are specified for the industrial temperature range of −40°C to +125°C, making them suitable for demanding environments.
Can the AD8206WHRZ be used as a direct replacement for the AD820BRZ in an existing op amp circuit?
No. The AD8206WHRZ is a fixed-gain difference amplifier with a dedicated high-voltage input structure, while the AD820BRZ is a general-purpose op amp with external feedback configurability. Substituting one for the other would require a complete redesign of the circuit topology and is not a drop-in replacement.