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Analog Devices Inc. AD4022BCPZ-RL7
- Part No.:
- AD4022BCPZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-VFDFN Exposed Pad, CSP
- Datasheet:
-
AD4022BCPZ-RL7.pdf
- Description:
- IC ADC 20BIT SAR 10LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:914
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Product details
Overview
AD4022BCPZ-RL7 from Analog Devices is a 20-bit, 500 kSPS differential successive approximation register (SAR) analog-to-digital converter with Easy Drive architecture, ±VREF input range (2.4 V–5.1 V reference), −40°C to +125°C operation, and 3 mm × 3 mm LFCSP package. It delivers 101 dB dynamic range, ±3.1 ppm INL, and 99 dB SNR at 1 kHz for high-precision data acquisition in space-constrained industrial sensors.
For engineers reviewing the AD4022BCPZ-RL7 datasheet, AD4022BCPZ-RL7 pinout, AD4022BCPZ-RL7 application, or AD4022BCPZ-RL7 equivalent, key selection criteria include guaranteed 20-bit no-missing-codes performance, input overvoltage clamp (±50 mA), low 2.7 mW VDD-only power at 500 kSPS, and SPI/QSPI/MICROWIRE-compatible serial interface with 1.71 V–5.5 V logic supply flexibility.
Technical Context
The AD4022BCPZ-RL7 implements a precision SAR conversion core with integrated input span compression and high-Z acquisition mode, enabling single-supply operation without negative rail while preserving full 20-bit code range. Its Easy Drive architecture reduces input current to 0.3 nA (acquisition phase) and extends acquisition time to 1770 ns - 88.5% of the 2 µs cycle - eliminating need for dedicated ADC driver amplifiers.
It supports three SPI interface modes (CS 3-/4-wire, daisy-chain), configurable status bit reporting, and robust input protection: clamps sink up to 50 mA with 5.4 V turn-on threshold (VREF = 5 V) and deactivate within 360 ns. Conversion latency is zero - first result available immediately post-CNV rising edge - with no pipeline delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 20-bit, guaranteed no missing codes - ensures monotonicity and full code coverage for metrology-grade measurements. |
| Throughput Rate | 500 kSPS - fixed maximum sampling rate for AD4022 variant; enables accurate capture of signals up to ~10 MHz bandwidth. |
| INL Error | ±3.1 ppm max - translates to ±3.3 LSB at 20 bits, supporting <0.0003% end-point linearity in calibration-critical systems. |
| SNR | 99 dB at fIN = 1 kHz, VREF = 5 V - provides >16.4 ENOB for high-fidelity signal reconstruction in instrumentation. |
| Dynamic Range | 101 dB - allows detection of signals 100,000× smaller than full scale, critical for wide-dynamic-range sensor interfaces. |
| Input Voltage Range | ±VREF (−5 V to +5 V at VREF = 5 V) - differential input supports true bipolar measurement without level-shifting circuitry. |
| Power Dissipation | 2.7 mW (VDD only) at 500 kSPS - ultra-low active power enables battery-powered or thermally constrained deployments. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, motor control, and industrial PLC environments. |
Pinout & Package
AD4022BCPZ-RL7 uses a 10-lead, 3 mm × 3 mm lead-frame chip-scale package (LFCSP) with exposed pad (EPAD) connected to GND. The package supports fine-pitch PCB assembly and enhanced thermal performance (θJC = 33°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 REF | Analog Reference Input | Accepts 2.4 V–5.1 V external reference; requires local 10 µF X7R decoupling to GND for noise immunity and stability. |
| 2 VDD | Analog Power Supply | 1.71 V–1.89 V supply; bypassed with 0.1 µF ceramic capacitor to GND to suppress switching noise on SAR core. |
| 3 IN+ | Differential Analog Input (+) | High-impedance input accepting ±VREF range; paired with IN− for true differential acquisition and CMRR >68 dB. |
| 4 IN− | Differential Analog Input (−) | Complements IN+; common-mode voltage centered at VREF/2 ±125 mV - enables rejection of shared noise sources. |
| 5 GND | Power Ground | Primary return path for analog and digital supplies; must connect to low-impedance ground plane to minimize noise coupling. |
| 6 CNV | Convert Control Input | Edge-triggered command initiating conversion; selects interface mode (CS vs. daisy-chain) based on SDI state at rising edge. |
| 7 SDO | Serial Data Output | 20-bit twos-complement output synchronized to SCK; tri-stated when CNV/SDI high in CS mode. |
| 8 SCK | Serial Clock Input | Accepts 1.71 V–5.5 V logic levels; minimum 40 MHz SCK required for 500 kSPS in CS mode (tSCK ≤ 25 ns). |
| 9 SDI | Serial Data Input | Configures interface mode and accepts 16-bit register writes; low at CNV rising edge enables daisy-chain; high enables CS mode. |
| 10 VIO | Digital I/O Power | Independent 1.71 V–5.5 V supply for logic interface - isolates digital noise from analog section and supports mixed-voltage hosts. |
Key Features
| Feature | Design Value |
|---|---|
| Easy Drive Input Architecture | Reduces acquisition-phase input current to 0.3 nA and extends acquisition time to 1770 ns - eliminates need for external op-amp drivers in most applications. |
| Input Span Compression | Shifts input range to 0.1×VREF to 0.9×VREF when enabled - enables single-supply operation without negative rail while retaining full 20-bit resolution. |
| Integrated Overvoltage Clamp | Sinks up to 50 mA per input with 5.4 V turn-on (VREF = 5 V) and 360 ns deactivation - protects ADC and reference from transient surges without external diodes. |
| Zero-Latency Conversion | First conversion result available immediately after CNV rising edge - no pipeline delay or initialization cycles required for real-time control loops. |
| Flexible SPI Interface | Supports 3-wire/4-wire CS mode and daisy-chain mode with 1.71 V–5.5 V VIO - interoperates with FPGAs, microcontrollers, and isolated digital hosts. |
| Wide Temperature Operation | Specified from −40°C to +125°C with guaranteed 20-bit performance - suitable for engine control units, motor drives, and downhole instrumentation. |
Applications
| Automated Test Equipment (ATE) | Medical Imaging Front-End |
|---|---|
Use Scenario: High-channel-count parametric test systems requiring simultaneous sampling of multiple sensor outputs with traceable 20-bit accuracy. IC Role / Device Role / Timing Role: Precision SAR ADC capturing calibrated analog stimulus responses; zero-latency operation synchronizes with pattern generator timing. Use Value: 101 dB dynamic range resolves sub-microvolt signals in presence of 5 V full-scale noise floor; 500 kSPS throughput supports multi-point DC/low-frequency AC characterization. |
Use Scenario: Portable ultrasound or MRI signal chain digitizing low-amplitude echo waveforms with minimal added noise. IC Role / Device Role / Timing Role: Final-stage digitizer in analog beamformer; differential inputs reject common-mode interference from RF coils and power supplies. Use Value: 99 dB SNR preserves weak tissue-reflected signals; input overvoltage clamp withstands ESD events during probe handling without latch-up. |
| Battery-Powered Condition Monitoring | Precision Industrial Sensor Node |
Use Scenario: Wireless vibration sensor node operating for years on coin-cell battery, measuring bearing harmonics in rotating machinery. IC Role / Device Role / Timing Role: Low-power ADC sampling piezoelectric transducer output; triggered by wake-up interrupt to minimize active time. Use Value: 2.7 mW VDD-only power at 500 kSPS extends battery life; −40°C to +125°C rating ensures reliability in uncontrolled ambient environments. |
Use Scenario: DIN-rail mounted temperature/pressure transmitter requiring metrology-grade linearity and long-term stability in factory automation. IC Role / Device Role / Timing Role: Primary digitizer interfacing with precision RTD/bridge sensors; referenced to stable 4.096 V external reference. Use Value: ±3.1 ppm INL enables <0.001% system-level calibration accuracy; 101 dB dynamic range captures both process setpoints and fault transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-accuracy SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD4020BCPZ-RL7 | 1.8 MSPS throughput, higher power (15 mW), identical pinout and feature set. | Targeted at high-speed data logging where oversampling isn't feasible; requires faster SCK (≥71 MHz) and higher digital power budget. | Select AD4020BCPZ-RL7 only if system demands >1 MSPS sampling; AD4022BCPZ-RL7 offers better power efficiency at 500 kSPS. |
| ADS8860IDRCT | Texas Instruments 16-bit, 1 MSPS SAR ADC; lower resolution, no input clamp, 3.3 V only VIO. | Suitable for cost-sensitive industrial I/O modules where 16-bit resolution suffices and external overvoltage protection is acceptable. | Choose ADS8860IDRCT for simpler, lower-cost designs with relaxed accuracy requirements; AD4022BCPZ-RL7 adds 4-bit resolution, clamp protection, and wider VIO range. |
Compared with AD4020BCPZ-RL7, AD4022BCPZ-RL7 trades speed for 5.6× lower VDD power at its rated 500 kSPS, while retaining identical pin compatibility and Easy Drive features; versus ADS8860IDRCT, it delivers 4 extra bits of resolution, integrated overvoltage protection, and dual-supply flexibility - justifying use in metrology and safety-critical sensing.
Availability
AD4022BCPZ-RL7 is available at Aetrix Electronics and suitable for automated test equipment, medical imaging front-ends, and battery-powered condition monitoring systems requiring stable component supply across extended product lifecycles.
Supply support for AD4022BCPZ-RL7 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 AD402x family was designed specifically for precision data acquisition systems demanding 20-bit accuracy, low power, and robust input protection in harsh industrial and medical environments - with AD4022BCPZ-RL7 optimized for 500 kSPS operation.
FAQ
What is the maximum recommended reference voltage for AD4022BCPZ-RL7?
The AD4022BCPZ-RL7 supports an external reference voltage (VREF) from 2.4 V to 5.1 V. At VREF = 5.1 V, the full-scale differential input range becomes ±5.1 V, maximizing dynamic range while maintaining specified SNR and INL performance. Operation above 5.1 V violates absolute maximum ratings and may cause permanent damage.
Does AD4022BCPZ-RL7 require an external driver amplifier?
No, AD4022BCPZ-RL7 does not require an external driver amplifier in most cases due to its Easy Drive architecture. With only 0.3 nA input current during acquisition and a 1770 ns acquisition window at 500 kSPS, it can be driven directly by low-output-impedance sources such as precision voltage references, resistor dividers, or buffered sensor outputs.
Can AD4022BCPZ-RL7 operate with a 2.5 V reference voltage?
Yes, AD4022BCPZ-RL7 fully supports VREF = 2.5 V. At this level, SNR drops to 93.3 dB and dynamic range to 101 dB, but all 20-bit no-missing-codes performance, ±3.1 ppm INL, and −40°C to +125°C operation remain guaranteed. Input range scales to ±2.5 V differentially.
What is the purpose of the exposed pad on AD4022BCPZ-RL7?
The exposed pad (EPAD) on AD4022BCPZ-RL7 must be connected to GND for optimal thermal performance (θJC = 33°C/W) and EMI suppression. While not strictly required to meet electrical specifications, grounding the EPAD improves power dissipation and reduces noise coupling into sensitive analog nodes - especially critical in high-resolution measurement systems.
How does the input overvoltage clamp function in AD4022BCPZ-RL7?
The AD4022BCPZ-RL7 input overvoltage clamp activates when IN+ or IN− exceeds VREF + 0.25 V (e.g., 5.25 V at VREF = 5 V). It sinks up to 50 mA per input to protect internal circuitry, with deactivation occurring within 360 ns after overvoltage removal. This eliminates need for external Schottky diodes while preserving reference stability.
AD4022BCPZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 20
- Sampling Rate (Per Second):
- 500k
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- DSP, MICROWIRE™, QSPI™, and SPI™
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 1.71V ~ 1.89V
- Voltage - Supply, Digital:
- 1.71V ~ 5.5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 10-LFCSP-WD (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD4022BCPZ-RL7 FAQ
1.How can I place an order for AD4022BCPZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD4022BCPZ-RL7 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 AD4022BCPZ-RL7 reliable?
The price and inventory of AD4022BCPZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD4022BCPZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD4022BCPZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD4022BCPZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD4022BCPZ-RL7?
AD4022BCPZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD4022BCPZ-RL7 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 AD4022BCPZ-RL7?
For technical support, including AD4022BCPZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD4022BCPZ-RL7 requirements.
6.How does Aetrix verify that AD4022BCPZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD4022BCPZ-RL7 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 AD4022BCPZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD4022BCPZ-RL7?
All AD4022BCPZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD4022BCPZ-RL7, 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 AD4022BCPZ-RL7 part is unused and in its original packaging.
Return procedure for AD4022BCPZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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