Part A
AD8066ARZ-R7
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 3776 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
Not a drop-in replacement
The AD8066ARZ-R7 and AD8061AR are not drop-in replacements for one another. The AD8066ARZ-R7 is a dual-channel, high-speed voltage feedback amplifier in an 8-lead SOIC package, while the AD8061AR is a single-channel, low-cost, high-speed amplifier in an 8-lead SOIC package. Although both share the same SOIC-8 footprint and similar supply voltage ranges, the difference in channel count, bandwidth, and quiescent current means the AD8061AR cannot directly substitute for the AD8066ARZ-R7 in dual-channel signal chains, and the AD8066ARZ-R7 is over-specified for single-channel applications. Designers must re-evaluate the circuit topology, channel requirements, and AC performance before considering any substitution.
Different channel count
Different bandwidth
Different quiescent current
Different application fit
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD8066ARZ-R7 | AD8061AR | Why it matters |
|---|---|---|---|
| Number of Amplifiers | 2 (Dual) | 1 (Single) | Channel count determines whether the part can directly replace the other in a circuit; a dual cannot drop into a single-amplifier footprint and vice versa. |
| Gain Bandwidth Product | 145 MHz | 300 MHz | GBW sets the maximum signal frequency the amplifier can handle at a given gain; a large mismatch affects bandwidth-critical designs. |
| Slew Rate | 180 V/µs | 650 V/µs | Slew rate limits large-signal response and distortion; the AD8061 is substantially faster, which matters for high-speed pulse and video applications. |
| Input Voltage Noise Density | 7 nV/√Hz | 8.5 nV/√Hz | Lower input noise improves signal-to-noise ratio in low-level signal amplification; the values are close but not identical. |
| Supply Voltage Range | 5 V to 24 V (±2.5 V to ±12 V) | 2.7 V to 10 V (±1.35 V to ±5 V) | The usable supply window determines compatibility with the system rail; the AD8066 tolerates much higher supplies than the AD8061. |
| Quiescent Supply Current (per amplifier) | 6.4 mA | 6.8 mA | Quiescent current affects power budget and thermal load; similar but not identical values influence low-power design decisions. |
| Input Offset Voltage (max) | 1.5 mV | 6 mV | Offset voltage contributes DC error; the AD8066 offers tighter offset, which matters for precision DC-coupled stages. |
| Package | 8-Lead SOIC | 8-Lead SOIC | Package and pinout must match for board-level interchangeability; both use 8-lead SOIC but with different pin functions due to channel count. |
| Output Current (short-circuit) | 35 mA | 50 mA | Output drive capability affects the ability to drive capacitive or low-impedance loads; the AD8061 can source/sink more current. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD8066ARZ-R7 | AD8061AR |
|---|---|---|
| Supplier | - | Analog Devices Inc.,Rochester Electronics, LLC |
| Part Status | Active | Obsolete |
| Amplifier Type | Voltage Feedback | Voltage Feedback |
| Number of Circuits | 2 | 1 |
| Output Type | Rail-to-Rail | Rail-to-Rail |
| Slew Rate | 180V/µs | 650V/µs |
| -3 dB Bandwidth | 155 MHz | 320 MHz |
| Current - Input Bias | 3 pA | 3.5 µA |
| Voltage - Input Offset | 400 µV | 1 mV |
| Supply Current | 6.6mA (x2 Channels) | 6.8mA |
| Current - Output / Channel | 30 mA | 50 mA |
| Voltage - Supply Span(Min) | 5 V | 2.7 V |
| Voltage - Supply Span(Max) | 24 V | 8 V |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Mounting Type | Surface Mount | Surface Mount |
| Series | FastFET™ | - |
Frequently asked questions
What are the key differences between the AD8066ARZ-R7 and the AD8061AR?
The AD8066ARZ-R7 is a dual, high-performance, fast FET-input operational amplifier offered in an 8-lead SOIC package and supplied in 7-inch reel packaging. The AD8061AR is a single, low-cost, high-speed voltage-feedback operational amplifier offered in an 8-lead SOIC package. The primary differences are channel count (dual vs. single), target application positioning (high-performance FET-input vs. low-cost high-speed), and packaging format (reel vs. tube/standard).
Are the AD8066ARZ-R7 and AD8061AR pin-compatible?
No. The AD8066ARZ-R7 is a dual op amp with a standard dual pinout (two amplifiers sharing an 8-lead SOIC package), while the AD8061AR is a single op amp in an 8-lead SOIC package with a different pin function assignment. They are not drop-in replacements for each other despite sharing the same package footprint.
What are the supply voltage ranges for these two amplifiers?
The AD8066ARZ-R7 operates from a single supply of 5 V to 24 V or a dual supply of ±2.5 V to ±12 V. The AD8061AR operates from a single supply of 2.7 V to 12 V or a dual supply of ±1.35 V to ±6 V. The AD8061AR supports lower minimum supply voltages, making it suitable for lower-voltage systems.
How do the bandwidth specifications compare between the AD8066ARZ-R7 and AD8061AR?
The AD8066ARZ-R7 offers a −3 dB bandwidth of 145 MHz (G = +1) and a slew rate of 180 V/µs. The AD8061AR offers a −3 dB bandwidth of 300 MHz (G = +1) and a slew rate of 650 V/µs. The AD8061AR provides higher bandwidth and slew rate, while the AD8066ARZ-R7 provides dual channels with FET-input characteristics.
What are the input bias current characteristics of each device?
The AD8066ARZ-R7 features FET-input architecture with an input bias current of 6 pA typical, making it suitable for high-impedance sensor interfaces. The AD8061AR is a voltage-feedback amplifier with a bipolar input stage and an input bias current of 3.5 µA typical. The AD8066ARZ-R7 offers significantly lower input bias current for precision high-impedance applications.
Can the AD8061AR be used as a replacement for one channel of the AD8066ARZ-R7?
Not directly. Although both are operational amplifiers, they differ in channel count, input stage topology (FET vs. bipolar), supply range, bandwidth, and pinout. A single AD8061AR cannot directly replace one channel of the AD8066ARZ-R7 without circuit redesign and validation against the manufacturer datasheets for both devices.
What are the typical applications for each amplifier?
The AD8066ARZ-R7 is typically used in high-impedance sensor interfaces, photodiode amplification, active filters, and precision signal conditioning where low input bias current and dual channels are required. The AD8061AR is typically used in low-cost high-speed signal processing, video amplification, ADC drivers, and portable low-voltage systems where single-channel high bandwidth is needed.