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Analog Devices Inc. ADR4540CRZ-R7
- Part No.:
- ADR4540CRZ-R7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADR4540CRZ-R7.pdf
- Description:
- IC VREF SERIES 0.02% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,989
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Product details
Overview
ADR4540CRZ-R7 from Analog Devices is a precision 4.096 V ultralow-noise voltage reference IC in an 8-lead SOIC package, delivering ±0.02% initial accuracy (B/C/D grade), 0.8 ppm/°C max temperature coefficient (D grade, 0°C to 70°C), and 2.7 μV p-p (0.1 Hz–10 Hz) output noise - used in high-resolution SAR ADC biasing and precision sensor signal chains.
For engineers reviewing the ADR4540CRZ-R7 datasheet, ADR4540CRZ-R7 pinout, ADR4540CRZ-R7 application, or ADR4540CRZ-R7 equivalent, key selection criteria include low dropout (300 mV at 2 mA), ±10 mA output drive capability, long-term drift (8 ppm at 4500 hours, D grade), and AEC-Q100 qualification for automotive battery monitoring systems.
Technical Context
The ADR4540CRZ-R7 employs an advanced buried-zener core with proprietary thermal stabilization to achieve industry-leading TCVOUT performance and minimal hysteresis. Its dual-path ground sensing (GNDSENSE/GNDFORCE) and force-sense output architecture (VOUTFORCE/VOUTSENSE) enable sub-ppm-level load regulation stability under dynamic current conditions.
Designed for operation from 4.2 V to 15 V input, it maintains 950 μA max quiescent current and 90 dB ripple rejection at 1 kHz - enabling direct integration into low-power, noise-sensitive data acquisition front-ends without external filtering or LDO pre-regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V ±0.02% (max initial error, B/C/D grade) - enables direct interface with 12-bit to 16-bit ADCs using standard reference scaling. |
| Tempco (TCVOUT) | 0.8 ppm/°C max (D grade, 0°C to 70°C, box method) - ensures ≤3.5 ppm total drift over commercial temperature range. |
| Output Noise | 2.7 μV p-p (0.1 Hz to 10 Hz) - supports <20-bit ENOB in precision digitization without additional filtering. |
| Dropout Voltage | 300 mV at 2 mA load (VOUT ≥ 3 V) - allows operation from 4.4 V supply rails with margin for brownout resilience. |
| Quiescent Current | 950 μA max (−40°C to +125°C) - enables battery-powered portable instrumentation with multi-year runtime. |
| Long-Term Drift | 8 ppm typical at 4500 hours (D grade) - reduces calibration frequency in medical and industrial field equipment. |
| Ripple Rejection | 90 dB at 1 kHz - suppresses switching regulator noise without requiring dedicated LC filters. |
Pinout & Package
ADR4540CRZ-R7 is supplied in an 8-lead SOIC package (SOIC_N, 150 mil width) with exposed pad option not specified. Pin 1 is NC; Pin 2 is VIN; Pin 4 is GND; Pin 6 is VOUT; Pins 3, 5, 7 are NC; Pin 8 is DNC (Do Not Connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NIC) | Not Internally Connected | No internal connection - may be left floating or tied to GND for mechanical stability; no electrical function. |
| 2 (VIN) | Input Voltage Supply | Accepts 4.2 V to 15 V DC; requires ≥0.1 µF ceramic bypass capacitor close to pin for stability. |
| 4 (GND) | Power Ground Reference | Primary ground return path; must connect to system power ground plane with low-inductance trace. |
| 6 (VOUT) | Reference Output | Delivers regulated 4.096 V; drives up to ±10 mA; requires 0.1 µF to 100 µF output capacitance for transient response. |
| 8 (DNC) | Do Not Connect | Internally undefined - must remain unconnected to avoid latch-up or parametric shift. |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow 0.1 Hz–10 Hz noise | 2.7 μV p-p enables sub-1 LSB error in 16-bit+ data converters without post-filtering. |
| Force-sense output architecture | VOUTFORCE/VOUTSENSE separation minimizes IR drop errors in high-accuracy ratiometric measurements. |
| AEC-Q100 qualified | Qualified for automotive applications including battery cell monitoring and ADAS sensor conditioning. |
| Low dropout at full load | 300 mV dropout at 2 mA allows use with 4.4 V nominal supplies - critical for 5 V rail-constrained designs. |
| Stable with wide output capacitance | Supports 0.1 µF to 100 µF ceramic or tantalum capacitors - simplifies layout across diverse PCB stackups. |
Applications
| Precision Data Acquisition | High-Resolution ADC Biasing |
|---|---|
|
Use Scenario: 16-bit SAR ADC front-end in portable environmental monitors measuring PM2.5, CO₂, and humidity. IC Role / Device Role / Timing Role: Primary voltage reference establishing full-scale input range for analog-to-digital conversion. Use Value: 0.8 ppm/°C tempco and 2.7 μV p-p noise ensure <±0.5 LSB total error across 0°C–70°C operating range. |
Use Scenario: Calibration-grade digital multimeter with 22-bit ΣΔ ADC and auto-ranging input stage. IC Role / Device Role / Timing Role: Stable reference source for both ADC and DAC in self-calibration loop. Use Value: 8 ppm long-term drift (4500 hrs) extends recalibration interval to ≥2 years in metrology-grade instruments. |
| Automotive Battery Monitoring | Industrial Sensor Signal Conditioning |
|
Use Scenario: Cell voltage measurement in 12S Li-ion battery packs for EV powertrain control units. IC Role / Device Role / Timing Role: Precision reference for isolated delta-sigma modulators feeding battery management MCU. Use Value: AEC-Q100 qualification and −40°C to +125°C operation support ASIL-B functional safety compliance. |
Use Scenario: Strain-gauge bridge amplifier in factory-floor load cells interfacing to programmable logic controllers. IC Role / Device Role / Timing Role: Ratiometric reference for instrumentation amplifier gain-setting and ADC reference simultaneously. Use Value: Force-sense architecture eliminates lead resistance error, maintaining ±0.01% linearity over 10 m cable runs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR444BRZ | 4.096 V output, 3 ppm/°C max tempco (B grade), 4.5 μV p-p noise, SOIC-8, no force-sense pins | Lacks VOUTSENSE/GNDFORCE - unsuitable for ultra-high-accuracy ratiometric systems with long traces | Select when cost sensitivity outweighs need for sub-ppm load regulation; verify noise budget permits 4.5 μV p-p floor. |
| REF5040AIDR | 4.096 V output, 3 ppm/°C max tempco (A grade), 4.5 μV p-p noise, SOIC-8, no AEC-Q100 qualification | Not automotive-qualified; higher long-term drift (15 ppm/4500 hrs); no force-sense architecture | Prefer for industrial-only applications where AEC-Q100 is unnecessary and lower initial cost is prioritized. |
Compared with ADR4540CRZ-R7, ADR444BRZ offers lower cost but sacrifices 1.7× more noise and lacks force-sense capability, while REF5040AIDR trades AEC-Q100 qualification and superior drift for broader distributor availability and legacy design familiarity.
Availability
ADR4540CRZ-R7 is available at Aetrix Electronics and suitable for precision data acquisition systems, automotive battery monitoring, and industrial sensor signal conditioning requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ADR4540CRZ-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, founded in 1965 and headquartered in Wilmington, MA.
The ADR45xx family was engineered specifically for metrology-grade voltage referencing in safety-critical and high-accuracy systems - emphasizing ultralow noise, minimal hysteresis, and AEC-Q100-compliant reliability.
FAQ
What is the maximum input voltage rating for ADR4540CRZ-R7?
The absolute maximum input voltage for ADR4540CRZ-R7 is 16 V, per the Absolute Maximum Ratings table. Operation above 15 V is not recommended, and the device is specified for normal operation from 4.2 V to 15 V. Exceeding 16 V risks permanent damage due to internal junction breakdown.
Does ADR4540CRZ-R7 require external capacitors for stability?
Yes, ADR4540CRZ-R7 requires a minimum 0.1 µF ceramic capacitor on the VOUT pin and recommends a 0.1 µF capacitor on VIN. The datasheet specifies stable operation with output capacitance from 0.1 µF to 100 µF - no series resistance or special ESR requirements apply.
Is ADR4540CRZ-R7 pin-compatible with other ADR45xx variants?
ADR4540CRZ-R7 shares identical 8-lead SOIC pinout and terminal functions with ADR4520CRZ-R7, ADR4525CRZ-R7, ADR4530CRZ-R7, ADR4533CRZ-R7, and ADR4550CRZ-R7 - all use the same VIN/GND/VOUT/NIC/DNC configuration. Output voltage differs, but PCB layout is fully interchangeable.
What grade does the 'C' in ADR4540CRZ-R7 indicate?
The 'C' in ADR4540CRZ-R7 denotes the C grade, specifying 0°C to +70°C operating temperature range and 1 ppm/°C maximum temperature coefficient (box method). It also guarantees ±0.02% initial output voltage error and 8 ppm long-term drift at 4500 hours.
Can ADR4540CRZ-R7 sink and source current simultaneously?
No - ADR4540CRZ-R7 operates in either sourcing (up to +10 mA) or sinking (down to −10 mA) mode depending on load polarity, but cannot perform both simultaneously. Its output stage is a single-ended buffered reference; bidirectional current flow occurs only in time-multiplexed or AC-coupled configurations.
ADR4540CRZ-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Series
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 10 mA
- Tolerance:
- ±0.02%
- Temperature Coefficient:
- 1ppm/°C
- Noise - 0.1Hz to 10Hz:
- 2.7µVp-p
- Noise - 10Hz to 10kHz:
- -
- Voltage - Input:
- 3V ~ 15V
- Current - Supply:
- 950µA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADR4540CRZ-R7 FAQ
1.How can I place an order for ADR4540CRZ-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADR4540CRZ-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 ADR4540CRZ-R7 reliable?
The price and inventory of ADR4540CRZ-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADR4540CRZ-R7 is usually 5 days.
3.What payment methods are accepted for ADR4540CRZ-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADR4540CRZ-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADR4540CRZ-R7?
ADR4540CRZ-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADR4540CRZ-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 ADR4540CRZ-R7?
For technical support, including ADR4540CRZ-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADR4540CRZ-R7 requirements.
6.How does Aetrix verify that ADR4540CRZ-R7 is sourced from the original manufacturer or authorized distributors?
All ADR4540CRZ-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 ADR4540CRZ-R7 meets industry standards.
7.What is the process for return or replacement of ADR4540CRZ-R7?
All ADR4540CRZ-R7 units undergo pre-shipment inspection (PSI). If there is an issue with ADR4540CRZ-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 ADR4540CRZ-R7 part is unused and in its original packaging.
Return procedure for ADR4540CRZ-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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