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Analog Devices Inc. AD548JRZ
- Part No.:
- AD548JRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AD548JRZ.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:376
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Product details
Overview
AD548JRZ from Analog Devices is a precision, low-power BiFET operational amplifier in an 8-lead SOIC package, delivering 1 MHz unity-gain bandwidth, 1.8 V/µs slew rate, and ≤2 mV input offset voltage (J grade) for high-accuracy signal conditioning. It operates from ±4.5 V to ±18 V supplies, draws ≤200 µA quiescent current, and is widely used in battery-powered instrumentation front ends and CMOS DAC output buffers.
For engineers reviewing the AD548JRZ datasheet, AD548JRZ pinout, AD548JRZ application, or AD548JRZ equivalent, key selection criteria include guaranteed 10 pA max input bias current (warmed up), 20 µV/°C max offset drift, 82 dB min CMRR (B grade), and compatibility with LF441/TL061 footprints in low-power precision analog designs.
Technical Context
The AD548JRZ employs ion-implanted JFET input stages and laser wafer trimming to achieve stable DC performance across temperature and supply variations. Its input bias current remains ≤30 pA over the full common-mode range (±11 V), and open-loop gain exceeds 300 V/mV at ±12 V output swing into 10 kΩ.
Designed for dual-supply operation, it supports rail-to-rail input common-mode range (–11 V to +12 V) and delivers ±12 V output swing into 10 kΩ load. The device features internal ESD protection and is specified in warmed-up condition to ensure real-world dc accuracy without external trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage (J grade) | ≤2.0 mV max - ensures ≤0.05% error in 4 V full-scale 12-bit DAC buffer applications |
| Input Bias Current (warmed up) | ≤10 pA max - enables use with >1 GΩ source impedances without significant current-induced offset |
| Quiescent Current | ≤200 µA - allows continuous operation in coin-cell-powered portable instruments for >1 year |
| Unity-Gain Bandwidth | 1.0 MHz - supports stable closed-loop gain ≥1 with phase margin >60° using standard compensation |
| Slew Rate | 1.8 V/µs typical - settles 20 V step to ±0.01% in ≤14 µs, suitable for fast DAC output buffering |
| CMRR (B grade) | ≥82 dB min - maintains >12-bit linearity in high-Z differential sensor interfaces with common-mode noise |
| Input Voltage Noise (0.1–10 Hz) | 2 µV p-p - minimizes low-frequency drift in precision integrators and photodiode preamps |
Pinout & Package
AD548JRZ is housed in an 8-lead SOIC (R-8) package per JEDEC MS-012 AA, with 1.27 mm lead pitch and gull-wing leads. Thermal resistance θJA = 160°C/W enables operation at ambient temperatures up to +70°C without heatsinking under typical PCB layout conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null (–) | Connects to wiper of 10 kΩ potentiometer for manual input offset adjustment; unused pins must be left open or tied to Pin 5 |
| 2 | Inverting Input (–) | High-impedance JFET node; requires guarding and low-leakage PCB material (e.g., Teflon®) for <10 pA leakage paths |
| 3 | Noninverting Input (+) | High-impedance JFET node; common-mode range extends to within 1 V of either supply rail |
| 4 | V– (Negative Supply) | Accepts –4.5 V to –18 V; substrate junction forward-biased if input falls below this rail - requires input protection |
| 5 | Offset Null (+) | Connects to one end of 10 kΩ potentiometer; nulling induces ≤0.6 µV/°C added drift on AD548B |
| 6 | Output | Capable of ±12 V swing into 10 kΩ; drives 100 pF capacitive loads stably; short-circuit current limited to 15 mA |
| 7 | V+ (Positive Supply) | Accepts +4.5 V to +18 V; PSRR ≥80 dB ensures minimal supply ripple coupling into output |
| 8 | No Connect (NC) | Internally unconnected; must remain floating - no tie to ground or supply |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed offset & drift | 2 mV max initial offset and 20 µV/°C max drift (J grade) eliminate need for external trim pots in production systems |
| Guaranteed low bias current | ≤10 pA max after warm-up ensures stable operation with photodiodes, piezoelectric sensors, and high-R feedback networks |
| Pin-compatible upgrade path | Direct replacement for LF441 and TL061 - enables 85% power reduction without PCB layout changes |
| Enhanced warm-up stability | Specified in warmed-up condition (5+ minutes at 25°C) - guarantees published offset and bias specs during actual use |
| Robust input protection | Withstands input voltages equal to supply rails; survives ±4000 V ESD per HBM - reduces need for external clamping diodes |
Applications
| Battery-Powered Instrumentation Front End | CMOS DAC Output Buffer |
|---|---|
Use Scenario: Portable multimeter measuring microvolt-level thermocouple outputs with 12-bit resolution. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier conditioning low-level sensor signals before ADC sampling. Use Value: 200 µA quiescent current extends battery life; 2 mV offset and 20 µV/°C drift maintain calibration stability across 0–70°C operating range. |
Use Scenario: Unipolar 12-bit DAC (e.g., AD7545) driving analog output in programmable logic controller. IC Role / Device Role / Timing Role: Output buffer isolating R-2R ladder from load while preserving monotonicity and settling time. Use Value: 1.8 V/µs slew rate achieves 14 µs ±0.01% settling on 20 V steps; low 10 pA bias current prevents code-dependent offset errors. |
| Photodiode Preamplifier | Log Ratio Amplifier Front End |
Use Scenario: UV flame detector in gas chromatograph requiring femtoamp-level current measurement. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photodiode current to voltage with minimal input error sources. Use Value: ≤10 pA bias current avoids signal loss at high feedback resistances; 2 µV p-p 0.1–10 Hz noise preserves SNR in low-bandwidth detection. |
Use Scenario: Linearizing exponential output of thermistor-based temperature sensor over 4-decade range. IC Role / Device Role / Timing Role: High-precision front-end op amp in log ratio circuit comparing two matched transistor currents. Use Value: Sub-millivolt offset and picoamp bias current enable 1% log conformance from 300 pA to 1 mA input current range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC27L2CDR | Lower quiescent current (19 µA), but higher offset (10 mV max) and slower slew rate (0.035 V/µs) | Better for ultra-low-power sleep-mode circuits; unsuitable for DAC buffering or fast settling | Select when power budget is <50 µA and DC accuracy <1% is acceptable |
| OPA340UA | Rail-to-rail input/output, 1.8 V/µs slew rate, but higher bias current (0.5 pA typ → 50 pA max at 85°C) | Enables single-supply operation down to 2.7 V; less stable with high-Z photodiode sources above 60°C | Select for 3.3 V systems requiring rail-to-rail swing; avoid in high-temperature, high-impedance sensor nodes |
Compared with AD548JRZ, TLC27L2CDR trades DC precision for extreme low power, while OPA340UA offers rail-to-rail flexibility at the cost of elevated bias current drift - making AD548JRZ the optimal choice for dual-supply, low-drift, medium-speed precision analog signal chains.
Availability
AD548JRZ is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial DAC interfaces, photodiode sensing, and log-ratio signal conditioning requiring stable component supply across extended product lifecycles.
Supply support for AD548JRZ 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 AD548 belongs to Analog Devices' precision BiFET op amp family, engineered specifically for low-power, high-DC-accuracy applications where input bias current, offset drift, and self-heating effects must be minimized in portable and industrial measurement systems.
FAQ
What is the maximum operating temperature range for the AD548JRZ?
The AD548JRZ is rated for the commercial temperature range of 0°C to +70°C. This grade is distinct from the AD548B (–40°C to +85°C) and AD548S (–55°C to +125°C) variants. All electrical specifications in the AD548JRZ datasheet - including 2 mV max input offset voltage and 20 µV/°C drift - apply strictly within this 0°C to 70°C range.
Does the AD548JRZ require external offset nulling in typical applications?
No - the AD548JRZ does not require external offset nulling in most applications. Its laser-trimmed input offset voltage is guaranteed ≤2.0 mV (J grade), and nulling via Pins 1 and 5 adds up to 0.6 µV/°C of extra drift. External nulling is only recommended when sub-millivolt residual offset is mandatory, such as in high-gain (>100×) instrumentation amplifier configurations using the AD548JRZ.
Can the AD548JRZ drive capacitive loads without instability?
The AD548JRZ is designed to drive up to 100 pF capacitively without external compensation when loaded with ≥10 kΩ. Driving heavier capacitive loads (e.g., >200 pF) or lower resistive loads (<2 kΩ) may cause peaking or ringing due to reduced phase margin. For such cases, a small series resistor (10–50 Ω) between the output and capacitive load restores stability without degrading DC accuracy.
Is the AD548JRZ pin-compatible with the TL061CP?
Yes - the AD548JRZ is pin-compatible with the TL061CP in the 8-lead SOIC (R-8) and plastic DIP (N-8) packages. Both share identical pin assignments: Pin 1 (offset null –), Pin 2 (inverting input), Pin 3 (noninverting input), Pin 4 (V–), Pin 5 (offset null +), Pin 6 (output), Pin 7 (V+), and Pin 8 (NC). This allows direct drop-in replacement to improve DC precision and reduce supply current by ~85%.
What is the minimum supply voltage required for functional operation of the AD548JRZ?
The AD548JRZ operates functionally with supply voltages as low as ±4.5 V (±9 V total). However, its input offset voltage increases and common-mode range shrinks relative to the ±15 V rated condition. At ±4.5 V, the guaranteed common-mode input range is reduced to ±3.5 V, and PSRR degradation may elevate output error - so ±5 V or higher is recommended for precision applications.
AD548JRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1.8V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 750 µV
- Current - Supply:
- 170µA
- 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
AD548JRZ FAQ
1.How can I place an order for AD548JRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD548JRZ 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 AD548JRZ reliable?
The price and inventory of AD548JRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD548JRZ is usually 5 days.
3.What payment methods are accepted for AD548JRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD548JRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD548JRZ?
AD548JRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD548JRZ 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 AD548JRZ?
For technical support, including AD548JRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD548JRZ requirements.
6.How does Aetrix verify that AD548JRZ is sourced from the original manufacturer or authorized distributors?
All AD548JRZ 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 AD548JRZ meets industry standards.
7.What is the process for return or replacement of AD548JRZ?
All AD548JRZ units undergo pre-shipment inspection (PSI). If there is an issue with AD548JRZ, 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 AD548JRZ part is unused and in its original packaging.
Return procedure for AD548JRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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