Part A
AD8512ARZ
ADI公司
- Lifecycle
- Active
- Stock
- 2506 件
- Package
- SOIC-8
- Series
- 線性放大器-儀器、運算放大器、緩衝放大器
Replacement verdict
Compatible functional replacement candidate
The AD8512ARZ and AD8512BR are functionally compatible dual precision JFET operational amplifiers sharing identical core specifications, including the same dual channel configuration, SOIC-8 package, and ±4.5 V to ±18 V supply range. The AD8512BR offers a tighter grade with lower offset voltage and improved offset drift, making it a suitable upgrade candidate for applications requiring enhanced DC precision, while the AD8512ARZ remains a valid drop-in alternative where standard grade tolerances are acceptable.
Amplifier Channel Count
High match
Package Type
High match
Supply Voltage Range
High match
Input Offset Voltage Grade
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8512ARZ | AD8512BR | Why it matters |
|---|---|---|---|
| Input Offset Voltage (max) | 0.8 mV | 0.4 mV | Lower offset voltage improves DC accuracy; the B grade offers tighter precision for high-accuracy signal chains. |
| Input Offset Voltage Drift (max) | 10 µV/°C | 5 µV/°C | Lower drift maintains accuracy over temperature; the B grade is preferable for precision applications across temperature extremes. |
| Input Bias Current (max) | 100 pA | 50 pA | Lower bias current reduces errors in high-impedance circuits; the B grade suits more sensitive sensor and photodiode front-ends. |
| Input Noise Voltage Density (typ) | 8 nV/√Hz | 8 nV/√Hz | Noise density affects low-level signal resolution; both grades share similar noise performance for audio and instrumentation. |
| Gain Bandwidth Product (typ) | 8 MHz | 8 MHz | GBW determines achievable closed-loop bandwidth; identical values mean both grades support the same signal bandwidth. |
| Slew Rate (typ) | 20 V/µs | 20 V/µs | Slew rate limits large-signal response; matching values indicate equivalent dynamic behavior for both grades. |
| Supply Voltage Range | ±5 V to ±15 V | ±5 V to ±15 V | Operating supply range determines system compatibility; identical ranges allow drop-in substitution in the same rails. |
| Operating Temperature Range | -40 °C to +125 °C | -40 °C to +125 °C | Temperature range defines environmental robustness; identical ratings mean both grades suit the same industrial conditions. |
| Package / Mounting | 8-SOIC (surface mount) | 8-SOIC (surface mount) | Package compatibility ensures footprint interchangeability; identical SOIC packages allow direct board replacement. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8512ARZ | AD8512BR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | J-FET | J-FET |
| Number of Circuits | 2 | 2 |
| Slew Rate | 20V/µs | 20V/µs |
| Gain Bandwidth Product | 8 MHz | 8 MHz |
| Current - Input Bias | 25 pA | 25 pA |
| Voltage - Input Offset | 100 µV | 80 µV |
| Supply Current | 2.2mA (x2 Channels) | 2.2mA (x2 Channels) |
| Current - Output / Channel | 70 mA | 70 mA |
| Voltage - Supply Span(Min) | 10 V | 10 V |
| Voltage - Supply Span(Max) | 30 V | 30 V |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the key differences between the AD8512ARZ and AD8512BR?
Both are dual precision JFET-input operational amplifiers in an 8-lead SOIC package. The primary difference is grade: the AD8512BR is a higher-grade version with tighter guaranteed specifications, notably lower input offset voltage and offset drift, compared to the AD8512ARZ. The AD8512ARZ is the standard grade, while the AD8512BR is the B-grade with enhanced DC precision.
Are the AD8512ARZ and AD8512BR pin-compatible?
Yes. Both devices are offered in the same 8-lead SOIC (R-8) package with identical pinout, so they are pin-compatible and share the same PCB land pattern.
Can the AD8512ARZ and AD8512BR be used interchangeably in an existing design?
They are functionally interchangeable in most circuits because they share the same amplifier topology, pinout, and package. However, because the AD8512BR offers tighter guaranteed offset voltage and drift, substituting one for the other may change the DC error budget. The substitution should be validated against the design's accuracy requirements and the manufacturer datasheet limits for each grade.
What are the input offset voltage specifications for each grade?
The AD8512BR (B-grade) is specified with a lower maximum input offset voltage than the AD8512ARZ (standard grade). The B-grade guarantees tighter offset limits, making it preferable for precision DC applications. Designers should consult the official Analog Devices datasheet for the exact maximum offset voltage values for each grade.
Do both parts share the same supply voltage and operating temperature range?
Yes. Both the AD8512ARZ and AD8512BR are specified for the same supply voltage range and the same operating temperature range, as they are grades of the same AD8512 dual JFET-input op amp family. The grade difference affects precision specifications, not the supply or temperature ratings.
Which grade should be selected for precision DC applications?
The AD8512BR is the better choice for precision DC applications because its B-grade guarantees tighter input offset voltage and offset drift limits. The AD8512ARZ is suitable for applications where the standard-grade offset specifications are acceptable.
Are the AD8512ARZ and AD8512BR RoHS compliant?
Yes. The "Z" suffix in both part numbers indicates RoHS-compliant packaging per Analog Devices nomenclature, so both the AD8512ARZ and AD8512BR are RoHS-compliant devices.