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Analog Devices Inc. AD648KRZ-REEL
- Part No.:
- AD648KRZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD648KRZ-REEL.pdf
- Description:
- IC OPAMP JFET 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,397
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Product details
Overview
AD648KRZ-REEL from Analog Devices is a dual precision, low-power BiFET operational amplifier in an 8-lead SOIC package, featuring 1 MHz unity-gain bandwidth, 1.8 V/µs slew rate, and 400 µA max quiescent current per amplifier. It delivers 1 mV max input offset voltage (B-grade), 10 pA max warmed-up bias current, and 2 µV p-p 0.1 Hz–10 Hz noise-ideal for battery-powered instrumentation front ends and CMOS DAC buffers.
For engineers reviewing the AD648KRZ-REEL datasheet, AD648KRZ-REEL pinout, AD648KRZ-REEL application, or AD648KRZ-REEL equivalent, key selection criteria include guaranteed low drift (10 µV/°C max), matched dual-channel performance (≤1 mV offset matching), high common-mode rejection (82 dB min), and SOIC tape-and-reel packaging compliant with EIA-481A.
Technical Context
The AD648KRZ-REEL integrates two laser-trimmed JFET-input op amps on a single die using ion-implanted FET and wafer-level trimming. Its input stage maintains ≤10 pA bias current across the full common-mode range (±12 V), enabling high-impedance sensor interfacing without significant leakage error.
It operates from ±4.5 V to ±18 V supplies, delivers ±13 V output swing into ≥10 kΩ loads at industrial temperature (–40°C to +85°C), and achieves 8 µs settling time to ±0.01% for 20 V steps-supporting precision analog signal conditioning in low-power embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±4.5 V to ±18 V - supports wide-range bipolar supply designs including ±5 V, ±12 V, and ±15 V systems |
| Quiescent Current | 400 µA max (both amplifiers) - enables multi-year battery life in portable instrumentation |
| Input Offset Voltage | 1.0 mV max (AD648K grade) - ensures <0.025% gain error in 40 V full-scale precision measurement |
| Input Bias Current | 10 pA max (warmed up) - preserves accuracy with >100 MΩ source impedances (e.g., photodiode, pH electrode) |
| Unity-Gain Bandwidth | 1.0 MHz - sufficient for anti-aliasing filtering, DAC buffering, and sensor signal chain stages up to ~100 kHz |
| Slew Rate | 1.8 V/µs - supports clean 20 Vpp output transitions within 11 µs, critical for fast-settling data acquisition |
| CMRR | 82 dB min (B-grade) - rejects >12× common-mode interference in differential sensor interfaces |
| 0.1 Hz–10 Hz Noise | 2 µV p-p - minimizes low-frequency drift in DC-coupled precision amplifiers and weigh-scale front ends |
Pinout & Package
AD648KRZ-REEL is housed in an 8-lead SOIC (R-8) package, 3.9 mm × 4.9 mm body size, 1.27 mm lead pitch, compliant with JEDEC MS-012 AA. Thermal resistance θJA = 160°C/W, θJC = 42°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | High-impedance node requiring guarding for <10 pA leakage paths; connects to feedback network in transimpedance configurations |
| 2 | Non-Inverting Input (Amplifier A) | Accepts high-Z sensor signals (e.g., photodiode cathode); must be guarded to prevent surface leakage errors |
| 3 | Output (Amplifier A) | Capable of ±13 V swing into ≥10 kΩ; drives DAC reference buffers or ADC driver stages directly |
| 4 | Negative Supply (V–) | Connects to system ground or negative rail; input common-mode extends to 1 V below this rail |
| 5 | Non-Inverting Input (Amplifier B) | Independent high-Z input; used for matched channel in instrumentation amps or dual-sensor conditioning |
| 6 | Inverting Input (Amplifier B) | Matches Pin 1 characteristics; enables identical feedback topology for both channels |
| 7 | Output (Amplifier B) | Electrically isolated from Pin 3; crosstalk <–120 dB at 1 kHz enables simultaneous dual-channel precision measurement |
| 8 | Positive Supply (V+) | Accepts up to +18 V; input common-mode extends to 3 V above this rail; decoupling required within 1 cm |
Key Features
| Feature | Design Value |
|---|---|
| Laser wafer drift trimming | Guarantees 10 µV/°C max offset drift (AD648K), reducing warm-up-induced calibration drift in field-deployed instruments |
| Matched dual architecture | ≤1 mV input offset voltage matching between amplifiers - enables accurate differential gain control in low-power instrumentation amps |
| Low 1/f noise | 2 µV p-p (0.1 Hz–10 Hz) - critical for DC-stable photodiode preamps and thermocouple amplifiers where low-frequency noise dominates error budget |
| Guaranteed bias current over full CMVR | 10 pA max across ±12 V common-mode range - eliminates input current variation errors in rail-to-rail sensing applications |
| SOIC tape-and-reel packaging | EIA-481A compliant - supports automated SMT assembly for high-volume production of portable medical and test equipment |
| High open-loop gain | 1000 V/mV (min) - ensures >12-bit linearity in high-impedance buffer applications with minimal gain error |
Applications
| Battery-Powered Precision Instrumentation | CMOS DAC Output Buffer |
|---|---|
Use Scenario: Portable multimeter front end measuring µV-level thermocouple outputs with 16-bit resolution. IC Role / Device Role / Timing Role: Dual-channel low-noise, low-drift amplifier conditioning differential sensor voltage while rejecting common-mode noise. Use Value: 400 µA total quiescent current extends battery life beyond 5 years; 2 µV p-p 0.1 Hz–10 Hz noise ensures stable DC baseline for sub-µV measurements. | Use Scenario: Bipolar output stage for AD7545 12-bit CMOS DAC generating ±10 V analog signals in programmable power supplies. IC Role / Device Role / Timing Role: Precision current-to-voltage converter and level shifter providing sign-magnitude D/A transfer function. Use Value: 1 mV max offset voltage prevents DAC code-dependent zero-error; matched dual channels enable simultaneous I/V and Q/V generation in RF calibration systems. |
| Dual Photodiode Preamp | Low-Power Instrumentation Amplifier Core |
Use Scenario: Differential optical absorption analyzer using two matched photodiodes to reject ambient light interference. IC Role / Device Role / Timing Role: Transimpedance amplifier for each photodiode, exploiting matched offset and bias current to cancel common-mode photocurrent drift. Use Value: ≤10 pA bias current preserves >100 MΩ photodiode shunt resistance integrity; –120 dB crosstalk prevents channel coupling in ratiometric measurements. | Use Scenario: Portable ECG front end requiring >100 dB CMRR, <1 µV input-referred noise, and <600 µA total system current. IC Role / Device Role / Timing Role: First-stage amplifier in 3-op-amp IA topology, providing high-Z inputs and matched gain-setting paths. Use Value: 1 mV max offset matching reduces gain nonlinearity to <0.01%; 82 dB min CMRR meets AAMI EC11 standards for patient-connected devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL062CDR | Higher 30 pA bias current, 15 mV offset, 0.4 V/µs slew rate - lacks laser trimming and matched specs | General-purpose dual op amp; unsuitable for <100 MΩ sources or 12-bit+ precision | Lower-cost option only for non-critical AC-coupled or high-source-impedance tolerant designs |
| OP2177ARZ | Lower 2.5 nV/√Hz noise, 600 µA quiescent current, rail-to-rail output - no JFET input, higher power | Higher-precision, higher-power instrumentation; requires different layout for noise-sensitive nodes | Preferred when ultra-low voltage noise dominates over power budget, e.g., strain gauge bridges with <100 Ω source impedance |
Compared with TL062CDR and OP2177ARZ, AD648KRZ-REEL uniquely balances ultra-low bias current (10 pA), low drift (10 µV/°C), and sub-500 µA power in a matched dual configuration - making it irreplaceable in battery-powered, high-impedance sensor signal chains where long-term calibration stability is mandatory.
Availability
AD648KRZ-REEL is available at Aetrix Electronics and suitable for battery-powered instrumentation, precision DAC buffering, and dual photodiode preamplification requiring stable component supply across extended product lifecycles.
Supply support for AD648KRZ-REEL 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and aerospace markets since 1965.
The AD648 product line was engineered specifically for low-power, high-DC-accuracy dual op amp applications-including portable test equipment, medical sensors, and precision data acquisition-where laser-trimmed offset and drift stability outweigh raw speed requirements.
FAQ
What is the operating temperature range for AD648KRZ-REEL?
The AD648KRZ-REEL is rated for the industrial temperature range of –40°C to +85°C. This grade (K) guarantees specifications including 1 mV max input offset voltage and 10 pA max bias current across that full range, making AD648KRZ-REEL suitable for deployment in factory-floor controllers, outdoor environmental sensors, and automotive under-hood modules where thermal cycling is expected.
Does AD648KRZ-REEL support single-supply operation?
AD648KRZ-REEL is specified for dual-supply operation (±4.5 V to ±18 V) and does not feature rail-to-rail input or output. Its input common-mode range extends from 3 V above V– to 1 V below V+, and output swing is typically ±13 V into 10 kΩ. For true single-supply use, external level-shifting or biasing is required - AD648KRZ-REEL itself cannot operate with V– tied to ground without violating input/output voltage limits.
Is AD648KRZ-REEL pin-compatible with other dual op amps?
Yes, AD648KRZ-REEL uses the industry-standard 8-pin SOIC dual op amp pinout (Pin 1: Inverting Input A, Pin 2: Non-inverting Input A, Pin 3: Output A, Pin 4: V–, Pin 5: Non-inverting Input B, Pin 6: Inverting Input B, Pin 7: Output B, Pin 8: V+). It is explicitly documented as pin-compatible with LF442, TL062, and AD642 - enabling drop-in upgrades to improve precision and reduce power by up to 85% in existing designs.
What is the maximum load capacitance AD648KRZ-REEL can drive stably?
AD648KRZ-REEL is characterized to drive up to 100 pF capacitive load in unity-gain configuration while maintaining phase margin >45°, as confirmed in typical performance curves. Driving >100 pF requires external compensation (e.g., series resistor at output) to prevent peaking or oscillation. For loads exceeding 10 kΩ || 100 pF, closed-loop bandwidth drops below 1 MHz and settling time increases - verify stability with actual PCB parasitics in final layout.
How does the AD648KRZ-REEL's laser trimming affect long-term reliability?
AD648KRZ-REEL employs Analog Devices' proprietary laser wafer drift trimming process, which stabilizes offset voltage and drift over time and temperature. Long-term offset stability is specified at 15 µV/month - meaning AD648KRZ-REEL retains calibration integrity for >1 year in unattended field deployments. This trimming is performed at wafer level before packaging, ensuring consistent performance without post-assembly aging effects seen in non-laser-trimmed op amps.
AD648KRZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- J-FET
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 1.8V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- 1 MHz
- Current - Input Bias:
- 3 pA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 340µA (x2 Channels)
- Current - Output / Channel:
- 15 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AD648KRZ-REEL FAQ
1.How can I place an order for AD648KRZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD648KRZ-REEL 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 AD648KRZ-REEL reliable?
The price and inventory of AD648KRZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD648KRZ-REEL is usually 5 days.
3.What payment methods are accepted for AD648KRZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD648KRZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD648KRZ-REEL?
AD648KRZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD648KRZ-REEL 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 AD648KRZ-REEL?
For technical support, including AD648KRZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD648KRZ-REEL requirements.
6.How does Aetrix verify that AD648KRZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD648KRZ-REEL 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 AD648KRZ-REEL meets industry standards.
7.What is the process for return or replacement of AD648KRZ-REEL?
All AD648KRZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD648KRZ-REEL, 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 AD648KRZ-REEL part is unused and in its original packaging.
Return procedure for AD648KRZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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