Part A
AD590LF
Công ty Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4157 PCS
- Package
- CFLATPACK-2
- Series
- Temperature Sensors - Analog and Digital Output
Replacement verdict
Compatible functional replacement candidate
The AD590JF and AD590LF are functionally interchangeable two-terminal temperature transducers sharing identical output characteristics, supply range, and calibration tolerance; the only material distinction is the specified operating temperature range, so the AD590LF is a viable replacement for the AD590JF wherever the wider military-grade temperature window is acceptable or beneficial.
Output Type
High match
Calibration Accuracy
High match
Package Type
High match
Operating Temperature Range
Validation required
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD590JF | AD590LF | Why it matters |
|---|---|---|---|
| Temperature Accuracy (Calibration Error at 25°C) | ±2.5°C max | ±0.5°C max | Determines the initial absolute accuracy of the sensor; the LF grade offers a much tighter calibration tolerance, which is critical for precision temperature measurement without individual trimming. |
| Grade / Accuracy Class | J Grade | L Grade | The grade designates the guaranteed error budget; L grade is a higher-precision bin than J grade, so substitution changes the overall system accuracy specification. |
| Nonlinearity | ±0.8°C max (over full range) | ±0.3°C max (over full range) | Nonlinearity limits accuracy across the temperature span; the LF grade's tighter linearity reduces error at temperature extremes where calibration at 25°C alone cannot compensate. |
| Operating Temperature Range (Rated Performance) | -55°C to +150°C | -55°C to +150°C | Both share the same wide military-grade range, so the parts are interchangeable for extended-temperature applications; the difference lies in guaranteed accuracy, not range. |
| Output Current Sensitivity | 1 µA/K | 1 µA/K | The 1 µA/K transfer function is identical, so both parts interface to the same signal-conditioning circuitry (e.g., a 1 kΩ resistor gives 1 mV/K) without redesign. |
| Supply Voltage Range | +4 V to +30 V | +4 V to +30 V | Identical compliance range means either part can drop into the same supply rail design; no change to bias circuitry is required for substitution. |
| Package | 2-pin TO-52 (metal can) | 2-pin TO-52 (metal can) | Same hermetic TO-52 footprint ensures pin-for-pin and mechanical compatibility, so the LF can directly replace the JF on an existing PCB. |
| Long-Term Drift | ±0.1°C/month (typical, non-cumulative) | ±0.1°C/month (typical, non-cumulative) | Matching drift specifications mean long-term stability is equivalent, so substitution does not degrade recalibration intervals or lifetime accuracy. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD590LF | AD590JF |
|---|---|---|
| Part Status | Active | Active |
| Sensor Type | Analog, Local | Analog, Local |
| Sensing Temperature - Local | -55°C ~ 150°C | -55°C ~ 150°C |
| Output Type | Analog Current | Analog Current |
| Voltage - Supply | 4V ~ 30V | 4V ~ 30V |
| Accuracy - Highest(Lowest) | ±1°C | ±5°C |
| Test Condition | 25°C | 25°C |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the main difference between the AD590JF and AD590LF?
The primary difference is the specified accuracy grade. The AD590JF is a J-grade device with a calibration error of ±5°C maximum at 25°C, while the AD590LF is an L-grade device with a tighter calibration error of ±1°C maximum at 25°C. Both are otherwise functionally identical two-terminal current-output temperature transducers from Analog Devices.
Are the AD590JF and AD590LF pin-compatible and package-compatible?
Yes. Both the AD590JF and AD590LF are offered in the same 2-pin TO-52 (TO-206AB) hermetic metal can package with identical pin functions (current output and supply/return). They share the same footprint and can be interchanged on an existing PCB without layout changes.
What is the output scale factor and supply range for these devices?
Both the AD590JF and AD590LF provide a linear current output of 1 µA/K and operate over a supply voltage range of +4 V to +30 V. The output current is proportional to absolute temperature, allowing direct reading in kelvins without linearization circuitry.
What operating temperature range do the AD590JF and AD590LF support?
Both devices are specified for operation over the full military temperature range of −55°C to +150°C. The J and L accuracy grades differ in calibration error at 25°C, but both are rated for the same extended operating temperature range.
Can the AD590LF be used as a drop-in upgrade for the AD590JF?
Yes, in most cases. Because the AD590LF has a tighter calibration error (±1°C vs ±5°C at 25°C) and the same package, pinout, output scale factor, and supply range, it can replace the AD590JF where improved initial accuracy is desired. The system's error budget and any calibration trim should still be revalidated against the datasheet limits.
Do the AD590JF and AD590LF differ in long-term drift or nonlinearity specifications?
Both grades share the same core die and are specified with the same nonlinearity of ±0.5°C maximum over the rated temperature range and the same long-term drift specification per the Analog Devices datasheet. The grade designation distinguishes calibration accuracy at 25°C, not the underlying linearity or drift performance.
What is the power supply and output voltage compliance requirement for these sensors?
Both the AD590JF and AD590LF require a supply of +4 V to +30 V and present a high output impedance that maintains current accuracy over a compliance voltage range. The output current remains essentially independent of voltage across the specified compliance range, enabling remote sensing over long cable runs.