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Analog Devices Inc. AD8659ACPZ-R7
- Part No.:
- AD8659ACPZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-WQFN Exposed Pad, CSP
- Datasheet:
-
AD8659ACPZ-R7.pdf
- Description:
- IC CMOS 4 CIRCUIT 16LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,329
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Product details
Overview
AD8659ACPZ-R7 from Analog Devices is a quad-channel, rail-to-rail input/output, micropower precision operational amplifier optimized for low-power, wide-supply-voltage applications. It delivers 22 μA maximum quiescent current per amplifier, 350 μV maximum offset voltage, and 20 pA maximum input bias current across a 2.7 V to 18 V supply range, enabling high-accuracy current monitoring in industrial sensor front ends.
For engineers reviewing the AD8659ACPZ-R7 datasheet, AD8659ACPZ-R7 pinout, AD8659ACPZ-R7 application, or AD8659ACPZ-R7 equivalent, this page provides verified specifications, package mapping to 16-lead LFCSP, functional pin definitions, real-world use cases in 4–20 mA loop drivers and remote sensors, and two validated alternative parts with documented technical and application differences.
Technical Context
The AD8659ACPZ-R7 employs Analog Devices' patented DigiTrim® trimming to achieve low offset voltage without laser trimming, supporting stable dc gain accuracy over temperature (2 μV/°C drift). Its rail-to-rail input and output stages operate down to 2.7 V single supply or ±1.35 V dual supply, maintaining >95 dB channel separation and 90 dB EMI rejection at 400–2400 MHz.
It features unity-gain stability with 230 kHz gain bandwidth product (AV = 100), 305 kHz −3 dB closed-loop bandwidth (AV = 1), and 60° phase margin - all specified across −40°C to +125°C, making it suitable for harsh-environment signal conditioning where power efficiency and precision coexist.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 18 V single supply; ±1.35 V to ±9 V dual supply - enables direct interface with 3.3 V, 5 V, 12 V, and 15 V systems without level-shifting. |
| Quiescent Current per Amp | 18–22 μA typical/max at 25°C - supports battery-powered operation for >10 years in low-duty-cycle wireless sensor nodes. |
| Input Offset Voltage | 350 μV max at 25°C; 2 mV max over −40°C to +125°C - ensures <0.01% gain error in 100× current-sense amplifiers. |
| Input Bias Current | 20 pA max at 25°C - preserves signal integrity when amplifying high-impedance sources like pH electrodes or piezoresistive sensors. |
| Gain Bandwidth Product | 230 kHz at AV = 100 - supports stable closed-loop gain up to 100× with ≤0.1% settling in 15 μs for dc-coupled sensor buffering. |
| Output Swing | Rail-to-rail: VOL = 30 mV, VOH = 17.97 V at 18 V supply - maximizes dynamic range in single-supply data acquisition circuits. |
| EMI Rejection Ratio | 90 dB at 400/900/1800/2400 MHz - suppresses cellular/WiFi interference in industrial IoT edge nodes without external filtering. |
Pinout & Package
The AD8659ACPZ-R7 is packaged in a 16-lead LFCSP (CP-16-20) with exposed pad (EPAD), rated θJA = 52°C/W. The EPAD must be connected to V− or left unconnected per datasheet guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives low-impedance loads up to ±12 mA; rail-to-rail swing minimizes headroom loss. |
| 2 | −IN A | Inverting input of Channel A - high-impedance node (10 GΩ) for precision feedback networks. |
| 3 | +IN A | Non-inverting input of Channel A - matched to −IN A for CMRR >80 dB over full temperature range. |
| 4 | V+ | Positive supply rail - accepts up to 18 V; PSRR >100 dB reduces sensitivity to supply ripple. |
| 5 | −IN B | Inverting input of Channel B - electrically isolated from other channels; 95 dB channel separation prevents crosstalk. |
| 6 | +IN B | Non-inverting input of Channel B - identical input structure to +IN A; supports parallel sensor inputs. |
| 7 | OUT B | Amplifier B output - independently buffered; enables dual-path signal conditioning on one die. |
| 8 | OUT C | Amplifier C output - allows simultaneous processing of three sensor signals without external multiplexing. |
| 9 | −IN C | Inverting input of Channel C - supports differential configurations with matched offset drift (2 μV/°C). |
| 10 | +IN C | Non-inverting input of Channel C - referenced to same common-mode range as other inputs (0 V to V+). |
| 11 | +IN D | Non-inverting input of Channel D - enables fourth independent analog path; no internal connection to other channels. |
| 12 | −IN D | Inverting input of Channel D - fully isolated; supports quad-channel instrumentation amplifier topologies. |
| 13 | NIC | No Internal Connection - floating pin; must not be tied to any net to avoid parasitic coupling. |
| 14 | OUT D | Amplifier D output - completes quad functionality; each output capable of driving 100 kΩ loads to rail. |
| 15 | V− | Negative supply rail - reference for all inputs/outputs; EPAD connection improves thermal performance. |
| 16 | NIC | No Internal Connection - unused; leave unconnected per datasheet Figure 7 and Table 8. |
Key Features
| Feature | Design Value |
|---|---|
| DigiTrim® offset calibration | 350 μV max offset without laser trimming - eliminates post-package calibration cost and improves production yield. |
| Rail-to-rail I/O | Full 0 V to 18 V input range and output swing within 30 mV of rails - maximizes ADC utilization in single-supply systems. |
| Micropower operation | 22 μA max per amplifier at 18 V - enables 4-channel precision amplification from coin-cell batteries for >5 years. |
| High EMI immunity | 90 dB rejection at cellular/WiFi frequencies - removes need for ferrite beads or shielded enclosures in compact designs. |
| Extended temperature range | Specified from −40°C to +125°C - qualified for under-hood automotive, motor control, and industrial process environments. |
| Quad-channel integration | Four independent amplifiers in one 4 mm × 4 mm LFCSP - reduces PCB area by 60% vs. discrete SOIC solutions. |
Applications
| Current Monitoring | 4–20 mA Loop Drivers |
|---|---|
|
Use Scenario: Measuring motor phase current in industrial inverters using shunt resistors. IC Role / Device Role / Timing Role: Precision current-sense amplifier with 20 pA input bias current minimizing offset error in high-value gain networks. Use Value: Enables sub-0.1% current measurement accuracy over temperature without recalibration, critical for torque control fidelity. |
Use Scenario: Transmitting sensor data over long-distance 4–20 mA industrial loops. IC Role / Device Role / Timing Role: Output stage buffer and voltage-to-current converter driver with rail-to-rail output swing. Use Value: Delivers full 20 mA compliance with <10 mV headroom loss at 24 V loop supply, extending usable cable length. |
| Remote Wireless Sensors | Multipole Filters |
|
Use Scenario: Signal conditioning in battery-powered environmental sensors deployed in field locations. IC Role / Device Role / Timing Role: Low-noise, low-drift front-end amplifier for thermistor and humidity transducers. Use Value: 5 µV p-p 0.1–10 Hz noise and 2 μV/°C drift ensure stable baseline readings over multi-year deployments. |
Use Scenario: Implementing anti-aliasing or tone-shaping filters in portable medical devices. IC Role / Device Role / Timing Role: Quad op-amp configured as cascaded Sallen-Key stages with unity-gain stability. Use Value: 230 kHz GBP and 60° phase margin allow precise 10–100 Hz filter cutoffs without peaking or instability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision micropower op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADA4096-4ARUZ | Higher 30 μA supply current; lower 125 μV offset; 1.8 V to 36 V supply range. | Better suited for ultra-low-voltage (1.8 V) or high-voltage (36 V) systems; less optimal for 12–18 V industrial rails. | Select ADA4096-4ARUZ when operating below 2.7 V or above 18 V; AD8659ACPZ-R7 preferred for 12–18 V precision current sensing. |
| AD8609ARUZ | Higher 1 mA supply current; higher 600 μV offset; same 2.7–18 V range and quad LFCSP package. | Targeted at general-purpose, non-battery applications where power is not constrained but cost is critical. | Choose AD8609ARUZ only if micropower is unnecessary and budget constraints outweigh precision requirements. |
Compared with ADA4096-4ARUZ and AD8609ARUZ, the AD8659ACPZ-R7 uniquely balances sub-25 μA quiescent current, sub-400 μV offset, and 18 V operation - making it the only quad op-amp in its class qualified for extended-temperature, high-voltage, battery-backed industrial sensing.
Availability
AD8659ACPZ-R7 is available at Aetrix Electronics and suitable for current monitoring, 4–20 mA loop drivers, remote wireless sensors, and multipole filters requiring stable component supply across industrial, automotive, and medical design cycles.
Supply support for AD8659ACPZ-R7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.
The AD8659ACPZ-R7 belongs to the AD865x precision micropower op amp family, designed specifically for battery-operated and energy-constrained industrial sensor interfaces demanding rail-to-rail operation and extended temperature reliability.
FAQ
What is the maximum supply voltage rating for the AD8659ACPZ-R7?
The AD8659ACPZ-R7 has an absolute maximum supply voltage rating of 20.5 V, but its recommended operating range is 2.7 V to 18 V. Operation at 18 V is fully characterized across −40°C to +125°C, with parameters including 22 μA max supply current, 350 μV max offset voltage, and 305 kHz −3 dB bandwidth confirmed in the Rev. C datasheet.
Does the AD8659ACPZ-R7 support rail-to-rail input and output operation?
Yes, the AD8659ACPZ-R7 supports true rail-to-rail input (0 V to V+) and output (within 30 mV of V− and 30 mV of V+ at full load) across its entire supply range. At 18 V supply, VOH = 17.97 V and VOL = 30 mV are guaranteed over temperature, enabling maximum dynamic range in single-supply data acquisition systems.
What is the function of the exposed pad (EPAD) on the AD8659ACPZ-R7 LFCSP package?
The exposed pad (EPAD) on the AD8659ACPZ-R7's 16-lead LFCSP package must be connected to V− or left unconnected - it is not internally connected to any circuit node. This configuration reduces thermal resistance (θJA = 52°C/W) and improves power dissipation capability, critical for sustained operation at +125°C ambient.
How does the AD8659ACPZ-R7 achieve low input offset voltage without laser trimming?
The AD8659ACPZ-R7 uses Analog Devices' patented DigiTrim® on-chip digital trimming technology during final test to adjust offset voltage in-system. This achieves 350 μV max offset at 25°C and 2 mV max over −40°C to +125°C without requiring external calibration or laser adjustment, improving manufacturing yield and long-term stability.
Is the AD8659ACPZ-R7 suitable for driving capacitive loads in filter applications?
Yes, the AD8659ACPZ-R7 is unity-gain stable and characterized for capacitive loads up to 100 pF. Its 60° phase margin and 230 kHz gain bandwidth ensure stable operation in Sallen-Key and multiple-feedback filter topologies; overshoot remains <10% at 100 pF per Figure 44 and Figure 47 of the datasheet.
AD8659ACPZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.08V/µs
- Gain Bandwidth Product:
- 200 kHz
- -3db Bandwidth:
- 305 kHz
- Current - Input Bias:
- 5 pA
- Voltage - Input Offset:
- 350 µV
- Current - Supply:
- 18µA (x4 Channels)
- Current - Output / Channel:
- 12 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 18 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LFCSP (4x4)
AD8659ACPZ-R7 FAQ
1.How can I place an order for AD8659ACPZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD8659ACPZ-R7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AD8659ACPZ-R7 reliable?
The price and inventory of AD8659ACPZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD8659ACPZ-R7 is usually 5 days.
3.What payment methods are accepted for AD8659ACPZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD8659ACPZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD8659ACPZ-R7?
AD8659ACPZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD8659ACPZ-R7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AD8659ACPZ-R7?
For technical support, including AD8659ACPZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD8659ACPZ-R7 requirements.
6.How does Aetrix verify that AD8659ACPZ-R7 is sourced from the original manufacturer or authorized distributors?
All AD8659ACPZ-R7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD8659ACPZ-R7 meets industry standards.
7.What is the process for return or replacement of AD8659ACPZ-R7?
All AD8659ACPZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD8659ACPZ-R7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AD8659ACPZ-R7 part is unused and in its original packaging.
Return procedure for AD8659ACPZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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