Part A
AD8512ARZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2506 個数
- Package
- SOIC-8
- Series
- リニアアンプ - 計装用、オペアンプ、バッファアンプ
Replacement verdict
Compatible functional replacement candidate
The AD8510ARZ and AD8512ARZ are both precision JFET-input operational amplifiers from the same AD851x family, sharing identical supply voltage range, input bias current characteristics, and unity-gain bandwidth. The primary distinction is channel count: the AD8510ARZ is a single-channel device while the AD8512ARZ is a dual-channel device. For applications requiring only one amplifier channel, the AD8512ARZ can serve as a functional substitute by using one of its two channels, though the unused channel should be properly terminated. Designers should verify PCB footprint compatibility and thermal considerations before committing to a drop-in substitution.
Channel Count
High match
Package Type
High match
Supply Voltage Range
High match
Input Bias Current
High match
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8510ARZ | AD8512ARZ | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 1 | 2 | Determines how many independent op-amp channels are available in a single package, directly affecting circuit density and channel count. |
| Input Offset Voltage (max) | 0.8 mV | 0.8 mV | Low offset voltage reduces DC error in precision signal chains; matching values indicate comparable DC accuracy. |
| Input Bias Current (typ) | 25 pA | 25 pA | Very low bias current suits high-impedance sensor and photodiode front-ends; identical values mean similar input loading behavior. |
| Gain Bandwidth Product | 8 MHz | 8 MHz | Sets the achievable closed-loop bandwidth and small-signal speed; equal GBW means comparable AC performance. |
| Slew Rate | 20 V/µs | 20 V/µs | Governs large-signal transient response and full-power bandwidth; identical slew rate supports equivalent dynamic behavior. |
| Input Voltage Noise Density | 8 nV/√Hz | 8 nV/√Hz | Determines noise floor in low-level signal amplification; matching values indicate equivalent noise performance. |
| Supply Voltage Range | ±5 V to ±15 V | ±5 V to ±15 V | Defines compatible power rails and output swing headroom; identical ranges allow drop-in use in the same supply architecture. |
| Supply Current per Amplifier (typ) | 2.2 mA | 2.2 mA | Affects power budget and thermal design; equal per-amplifier current means similar power consumption scaling with channel count. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Footprint and pinout compatibility affect PCB layout; both use the same 8-lead SOIC but pin assignments differ due to channel count. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8512ARZ | AD8510ARZ |
|---|---|---|
| Part Status | Active | Active |
| Amplifier Type | J-FET | J-FET |
| Number of Circuits | 2 | 1 |
| 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 | 100 µV |
| Supply Current | 2.2mA (x2 Channels) | 2.2mA |
| Current - Output / Channel | 70 mA | 70 mA |
| Voltage - Supply Span(Min) | 10 V | 9 V |
| Voltage - Supply Span(Max) | 30 V | 36 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 AD8510ARZ and AD8512ARZ?
The AD8510ARZ is a single-channel precision JFET-input operational amplifier, while the AD8512ARZ is a dual-channel version of the same amplifier family. Both are offered in 8-lead SOIC packages, but the AD8510ARZ uses the single-op-amp pinout and the AD8512ARZ uses the dual-op-amp pinout. Key AC and DC specifications, such as 8 nV/√Hz voltage noise, 5 pA input bias current, and 1.8 µV/°C offset drift, are essentially the same per amplifier.
Are the AD8510ARZ and AD8512ARZ pin-compatible?
No. Although both devices are packaged in an 8-lead SOIC (R-8) package, the AD8510ARZ is a single op amp and the AD8512ARZ is a dual op amp, so their pin functions differ. The AD8510ARZ uses pins for offset null and no second amplifier, while the AD8512ARZ uses pins 1, 2, 3, 5, 6, and 7 for the two amplifiers. They cannot be interchanged on the same PCB footprint without layout changes.
What are the supply voltage and quiescent current specifications for these amplifiers?
Both the AD8510ARZ and AD8512ARZ operate from dual supplies of ±4.5 V to ±18 V (or single supplies of 9 V to 36 V). The AD8510ARZ (single) typically draws about 2.0 mA of quiescent supply current, while the AD8512ARZ (dual) typically draws about 4.0 mA total, i.e., approximately 2.0 mA per amplifier.
What are the input bias current and input offset voltage specifications?
Both devices feature JFET inputs with a typical input bias current of 5 pA at 25°C (maximum 25 pA at 25°C). The typical input offset voltage is 100 µV, with a maximum of 400 µV for the AD8510ARZ and AD8512ARZ. Input offset voltage drift is typically 1.8 µV/°C.
What are the gain bandwidth and slew rate of the AD8510ARZ and AD8512ARZ?
Both amplifiers have a unity-gain bandwidth of 8 MHz and a slew rate of 20 V/µs. These specifications are identical per amplifier for the single AD8510ARZ and the dual AD8512ARZ.
What is the input voltage noise density of these amplifiers?
The AD8510ARZ and AD8512ARZ both specify a typical input voltage noise density of 8 nV/√Hz at 1 kHz. This low noise, combined with the JFET input stage, makes them suitable for high-impedance sensor and precision signal-conditioning applications.
Can the AD8512ARZ be used to replace two AD8510ARZ devices in a design?
Functionally, the AD8512ARZ provides two amplifiers with the same per-amplifier specifications as the AD8510ARZ, so it can replace two single devices in terms of electrical performance. However, the PCB layout must be redesigned because the dual op amp uses a different pinout and shares supply pins. Thermal and crosstalk considerations between the two channels should also be evaluated.
What are the operating temperature ranges and package options for these parts?
Both the AD8510ARZ and AD8512ARZ are specified over the industrial temperature range of −40°C to +125°C and are supplied in the 8-lead SOIC (R-8) package. The "ARZ" suffix indicates the SOIC package and RoHS-compliant lead finish.