Analog Devices Inc. ADR421ARMZ
| Parameters | |
|---|---|
| Series | XFET® |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| RoHS Status | ROHS3 Compliant |
| Package / Case | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) |
| Mfr | Analog Devices Inc. |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C (TA) |
| Current - Supply | 600µA |
| Output Type | Fixed |
| Voltage - Input | 4.5V ~ 18V |
| Tolerance | ±0.12% |
| Temperature Coefficient | 10ppm/°C |
| Current - Output | 10 mA |
| Supplier Device Package | 8-MSOP |
| Reference Type | Series |
| Voltage - Output (Min/Fixed) | 2.5V |
| Noise - 0.1Hz to 10Hz | 1.75µVp-p |
| Noise - 10Hz to 10kHz | - |
| Package | Tube |
| Product Status | Active |
| Base Product Number | ADR421 |
| REACH Status | REACH Unaffected |
| Standard Package | 50 |
| ECCN | EAR99 |
| HTSUS | 8542.39.0001 |
ADR421ARMZ voltage reference IC
The ADR421ARMZ from Analog Devices is an ultra-precision, low-noise voltage reference IC that delivers a stable 2.5 V output with exceptional accuracy and thermal stability for high-resolution data acquisition systems and precision instrumentation. This advanced reference utilizes Analog Devices' proprietary temperature drift curvature correction technology and buried Zener diode architecture to achieve an ultra-low temperature coefficient of 1 ppm/°C (maximum) and initial accuracy of ±0.04% (maximum), making it ideal for 16-bit to 20-bit analog-to-digital and digital-to-analog converters where reference stability directly impacts system performance. Housed in a compact 8-pin MSOP package, the device operates from a wide 4.5 V to 18 V supply voltage while consuming only 500 μA of quiescent current, and features low 1.2 μVp-p/V noise (0.1 Hz to 10 Hz) with excellent long-term stability of 25 ppm/1000 hours, ensuring reliable performance in industrial, medical, and test equipment applications requiring uncompromising precision.
ADR421ARMZ voltage reference Key Features
This voltage reference incorporates advanced circuit design techniques that deliver a stable 2.5 V output capable of sourcing up to 10 mA and sinking up to 2 mA of load current while maintaining 0.25 Ω typical output impedance across frequency. The ADR421ARMZ features a fast turn-on settling time of 10 μs to within 0.1% of final value and exhibits minimal output voltage hysteresis of 30 ppm typical after thermal cycling. Key specifications include a low 150 μV maximum output voltage noise (10 Hz to 10 kHz), excellent line regulation of 2 ppm/V (typical), and load regulation of 5 ppm/mA (typical) that ensures consistent performance under varying operating conditions. The device operates over the industrial temperature range of -40°C to +125°C and includes reverse battery protection and current limiting features for enhanced system reliability. Its combination of low noise, high accuracy, and excellent temperature stability makes it particularly suitable for precision measurement systems where even minor reference variations can significantly impact measurement integrity.
Alternative Voltage Reference Recommendations
● MAX6126AASA25+ (Analog Devices): An ultra-precision 2.5 V voltage reference featuring 2 ppm/°C temperature drift and 0.02% initial accuracy in an SOIC-8 package.
● LT6655BHS8-2.5#PBF (Analog Devices): A high-performance 2.5 V reference with 2 ppm/°C drift, 0.1% initial accuracy, and 25 ppm long-term stability for precision applications.
● REF5025IDGKR (Texas Instruments): A low-noise 2.5 V precision voltage reference with 3 ppm/°C maximum drift and 0.05% initial accuracy in a VSSOP-8 package.
● LM4132BMF-2.5/NOPB (Texas Instruments): A low-power 2.5 V precision reference with 10 ppm/°C drift and 0.1% initial accuracy optimized for portable instrumentation.
