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Analog Devices Inc. AD7949SCPZ-EP-RL7
- Part No.:
- AD7949SCPZ-EP-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD7949SCPZ-EP-RL7.pdf
- Description:
- IC ADC 14BIT SAR 20LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,115
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Product details
Overview
AD7949SCPZ-EP-RL7 from Analog Devices is a radiation-hardened, 14-bit, 8-channel successive approximation register (SAR) ADC optimized for high-reliability data acquisition in defense and aerospace systems. It delivers 250 kSPS throughput, ±0.5 LSB INL, 85 dB SINAD at 20 kHz, and operates across −55°C to +125°C with single 2.3 V–5.5 V supply and flexible reference options (2.5 V/4.096 V internal or external up to VDD).
For engineers reviewing the AD7949SCPZ-EP-RL7 datasheet, AD7949SCPZ-EP-RL7 pinout, AD7949SCPZ-EP-RL7 application, or AD7949SCPZ-EP-RL7 equivalent, this enhanced product supports multichannel system monitoring, seismic data acquisition, and battery-powered medical instrumentation requiring guaranteed military-grade temperature performance and AQEC-compliant manufacturing baseline.
Technical Context
The AD7949SCPZ-EP-RL7 integrates an on-chip 8-channel analog multiplexer supporting unipolar single-ended, differential (GND-sense), and pseudobipolar input configurations, paired with a no-pipeline-delay SAR core and internal temperature sensor. Its sequencer enables automatic channel scanning without host intervention.
It features a dual-voltage domain architecture: VDD powers analog circuitry (2.3 V–5.5 V), while VIO independently supplies the SPI interface (1.8 V–VDD), enabling seamless interfacing with 1.8 V, 2.5 V, 3.3 V, or 5 V logic. Reference flexibility includes internal 2.5 V/4.096 V options, buffered external REFIN (up to 4.096 V), or direct external REF (0.5 V–VDD).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14-bit with no missing codes - guarantees monotonicity and full code coverage over full temperature range. |
| Throughput | 250 kSPS at VDD ≥ 4.5 V - enables real-time capture of fast transients in power line or seismic monitoring. |
| INL / DNL | ±0.5 / ±0.25 LSB typical - ensures accurate amplitude fidelity for precision instrumentation and ECG signal chains. |
| SINAD / THD | 85 dB / −100 dB at 20 kHz - supports high-fidelity digitization of low-distortion analog signals in GPS and medical applications. |
| Analog Input Range | 0 V to VREF (unipolar) or −VREF/2 to +VREF/2 (bipolar) - configurable for ground-referenced or floating sensor interfaces. |
| Reference Options | Internal 2.5 V or 4.096 V (±10 ppm/°C drift); external REF (0.5 V–VDD) or buffered REFIN (0.5 V–VDD−0.5 V) - eliminates need for external reference ICs in space-constrained designs. |
| Power Dissipation | 2.9 mW at 2.5 V/200 kSPS; 10.8 mW at 5 V/250 kSPS - enables low-power operation in battery-backed or thermally constrained systems. |
| Temperature Range | −55°C to +125°C - qualified per AQEC standard for defense/aerospace deployment without derating. |
Pinout & Package
AD7949SCPZ-EP-RL7 is housed in a 20-lead, 4 mm × 4 mm LFCSP (CP-20-10) with exposed pad (non-connected, recommended soldered to ground plane). Package height is 0.75 mm and JEDEC MO-220-WGGD-11 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 1, 20) | Analog power supply | Nominally 2.5 V–5.5 V; minimum 3.0 V for 2.5 V internal REF, 4.5 V for 4.096 V internal REF; requires 10 µF + 100 nF decoupling. |
| REF (Pin 2) | Reference output/input | Outputs selectable 2.5 V or 4.096 V when internal REF enabled; accepts external reference (0.5 V–VDD) or buffered REFIN (≤4.096 V). |
| REFIN (Pin 3) | Internal REF buffer input | Provides unbuffered bandgap voltage (2.5 V or 4.096 V) when internal REF active; requires 0.1 µF decoupling. |
| GND (Pins 4, 5) | Analog ground | Dedicated AGND return path; must be connected to system ground plane with low-inductance layout. |
| IN0–IN7 (Pins 16–19, 6–9) | Analog input channels | Eight single-ended or differential inputs; all referenced to COM (Pin 10) for common-mode control. |
| COM (Pin 10) | Common-mode reference | Defines input common-mode point: 0 V (unipolar) or VREF/2 (bipolar/pseudobipolar) - critical for accurate differential measurement. |
| CNV (Pin 11) | Convert trigger | Rising edge initiates conversion; held high during conversion enables busy indicator on SDO. |
| DIN (Pin 12) | Serial configuration input | Writes to 14-bit configuration register (channel selection, REF mode, filter, sequencer) during or after conversion. |
| SCK (Pin 13) | SPI clock input | Drives synchronous serial interface; compatible with SPI, MICROWIRE, QSPI, DSP protocols; timing varies by VIO level. |
| SDO (Pin 14) | Serial data output | Outputs 14-bit result MSB-first; unipolar = straight binary, bipolar = two's complement; high-impedance after tDIS (32 ns min). |
| VIO (Pin 15) | Digital I/O supply | Independent 1.8 V–VDD supply for logic interface - enables mixed-voltage system integration without level shifters. |
Key Features
| Feature | Design Value |
|---|---|
| 8-channel MUX with input mode selection | Supports unipolar single-ended, differential (GND-sense), and pseudobipolar configurations - simplifies front-end design for diverse sensor types without external switching. |
| Integrated temperature sensor | Monitors die temperature via dedicated MUX channel (output = 283 mV at 25°C, 1 mV/°C) - enables thermal compensation and system health monitoring without external sensors. |
| Selectable one-pole filter | Configurable digital filter reduces aliasing and noise in low-bandwidth applications - improves effective resolution without external RC networks. |
| Channel sequencer | Automatically cycles through selected channels without host CPU intervention - reduces firmware overhead in continuous multichannel acquisition. |
| No pipeline delay SAR architecture | Delivers first valid conversion result immediately after CNV rising edge (tCONV = 2.2 µs typ) - enables deterministic timing for closed-loop control and real-time triggering. |
| Enhanced product qualification | Qualified to AQEC standard with controlled manufacturing baseline, extended temperature validation (−55°C to +125°C), and enhanced change notification - meets MIL-PRF-38535 Class K requirements. |
Applications
| Power Line Monitoring | Seismic Data Acquisition |
|---|---|
|
Use Scenario: Real-time sampling of AC voltage/current waveforms across multiple phases in substations or smart grid edge nodes. IC Role / Device Role / Timing Role: 8-channel simultaneous-sampling-capable ADC captures synchronized voltage and current harmonics up to 100 kHz bandwidth with <1.8 µs acquisition time. Use Value: Enables precise RMS, THD, and power factor calculation using internal 4.096 V reference and 85 dB SINAD - meets IEC 61000-4-30 Class A accuracy requirements. |
Use Scenario: High-channel-count geophone array digitization in oil/gas exploration or earthquake early-warning systems. IC Role / Device Role / Timing Role: Multichannel SAR ADC with low crosstalk (<−125 dB) and −55°C to +125°C operation acquires low-amplitude seismic signals in harsh environmental enclosures. Use Value: Internal temperature sensor allows on-board thermal drift correction of gain/offset errors, improving long-term stability without recalibration. |
| Medical Instrumentation (ECG/EKG) | Battery-Powered Field Equipment |
|
Use Scenario: Portable ECG monitors requiring low-noise, low-power analog front-end with lead-off detection and patient isolation compliance. IC Role / Device Role / Timing Role: Configured in differential mode with GND-sense for Wilson central terminal derivation; uses internal 2.5 V reference for consistent 305 µV/LSB resolution. Use Value: 2.9 mW power at 2.5 V/200 kSPS extends battery life; standby current of 50 nA enables rapid wake-on-event operation in wearable devices. |
Use Scenario: Ruggedized handheld test equipment (e.g., insulation resistance testers, portable oscilloscopes) operating in remote field conditions. IC Role / Device Role / Timing Role: Single-chip solution integrating MUX, REF, TEMP sensor, and sequencer - reduces BOM count and PCB area versus discrete ADC + reference + mux designs. Use Value: LFCSP package (4 mm × 4 mm) and −55°C to +125°C rating ensure mechanical robustness and operational reliability in uncontrolled ambient environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multichannel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7689BCPZ-RL7 | 16-bit, 8-channel, 250 kSPS SAR ADC; no internal reference; requires external REF; higher resolution but no integrated temperature sensor. | Better suited for high-precision DC measurements (e.g., process control calibration), but lacks on-chip REF and TEMP sensor for self-contained designs. | Select AD7689BCPZ-RL7 when 16-bit resolution and external reference control outweigh need for integrated REF/TEMP functionality. |
| AD7946BRUZ-REEL7 | 14-bit, 4-channel, 500 kSPS SAR ADC; same internal REF options and LFCSP package; higher throughput but half the channel count. | Ideal for high-speed, lower-channel-count applications (e.g., motor phase current sensing) where 500 kSPS is required and channel density is less critical. | Choose AD7946BRUZ-REEL7 when throughput >250 kSPS is mandatory and only 4 channels are needed - avoids overspecifying channel count. |
Compared with AD7949SCPZ-EP-RL7, AD7689BCPZ-RL7 trades integrated reference and temperature sensing for higher resolution, while AD7946BRUZ-REEL7 sacrifices channel count for doubled throughput - both require separate reference design and lack AQEC qualification for extended temperature operation.
Availability
AD7949SCPZ-EP-RL7 is available at Aetrix Electronics and suitable for defense electronics, aerospace avionics, and industrial process control systems requiring stable component supply across extended temperature and long lifecycle commitments.
Supply support for AD7949SCPZ-EP-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, serving precision instrumentation, industrial automation, and defense markets since 1965.
The AD7949-EP product line delivers enhanced reliability SAR ADCs for mission-critical applications demanding AQEC qualification, −55°C to +125°C operation, and controlled manufacturing baselines - specifically targeting defense, space, and nuclear instrumentation systems.
FAQ
What is the maximum sample rate of the AD7949SCPZ-EP-RL7 under full-bandwidth conditions?
The AD7949SCPZ-EP-RL7 achieves 250 kSPS maximum throughput when VDD is 4.5 V to 5.5 V and configured for full-bandwidth operation. At lower VDD (2.3 V to 4.5 V), the maximum rate drops to 200 kSPS. This is specified across the full −55°C to +125°C temperature range and confirmed in Table 2 of the AD7949-EP datasheet Rev. B.
Does the AD7949SCPZ-EP-RL7 support differential input configurations?
Yes, the AD7949SCPZ-EP-RL7 supports true differential input modes including differential (GND-sense) and pseudobipolar configurations. The 8-channel MUX allows any pair of inputs to be configured as differential, with COM (Pin 10) acting as the common-mode reference point set to VREF/2 for bipolar operation - validated in the Functional Block Diagram and General Description sections.
Can the internal temperature sensor in the AD7949SCPZ-EP-RL7 be used for system-level thermal compensation?
Yes, the AD7949SCPZ-EP-RL7 includes an internal temperature sensor with output voltage of 283 mV at 25°C and sensitivity of 1 mV/°C. It appears as a dedicated MUX channel (accessible via configuration register), enabling real-time die temperature measurement for gain/offset drift correction - detailed in Table 2 (TEMPERATURE SENSOR section) and Figure 1 functional diagram.
What reference voltage options are available for the AD7949SCPZ-EP-RL7?
The AD7949SCPZ-EP-RL7 supports three reference configurations: (1) internal 2.5 V or 4.096 V (selectable via configuration register), (2) buffered external reference applied to REFIN (0.5 V to 4.096 V), and (3) direct external reference applied to REF (0.5 V to VDD). All options are fully characterized across −55°C to +125°C per Table 4 specifications.
Is the AD7949SCPZ-EP-RL7 pin-compatible with commercial-grade AD7949 variants?
No, the AD7949SCPZ-EP-RL7 is not pin-compatible with commercial AD7949 variants due to differences in internal bonding, qualification testing, and enhanced product-specific handling of the exposed pad and thermal design. While the pinout matches electrically, AQEC qualification, extended temperature validation, and manufacturing baseline changes preclude drop-in replacement without requalification per MIL-PRF-38535 requirements.
AD7949SCPZ-EP-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PulSAR®
- Package/Case:
- 20-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 8
- Input Type:
- Differential, Pseudo-Differential, Single Ended
- Data Interface:
- SPI, DSP
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.3V ~ 5.5V
- Voltage - Supply, Digital:
- 2.3V ~ 5.5V
- Features:
- Temperature Sensor
- Operating Temperature:
- -55°C ~ 125°C
- Supplier Device Package:
- 20-LFCSP (4x4)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7949SCPZ-EP-RL7 FAQ
1.How can I place an order for AD7949SCPZ-EP-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7949SCPZ-EP-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 AD7949SCPZ-EP-RL7 reliable?
The price and inventory of AD7949SCPZ-EP-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7949SCPZ-EP-RL7 is usually 5 days.
3.What payment methods are accepted for AD7949SCPZ-EP-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7949SCPZ-EP-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7949SCPZ-EP-RL7?
AD7949SCPZ-EP-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7949SCPZ-EP-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 AD7949SCPZ-EP-RL7?
For technical support, including AD7949SCPZ-EP-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7949SCPZ-EP-RL7 requirements.
6.How does Aetrix verify that AD7949SCPZ-EP-RL7 is sourced from the original manufacturer or authorized distributors?
All AD7949SCPZ-EP-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 AD7949SCPZ-EP-RL7 meets industry standards.
7.What is the process for return or replacement of AD7949SCPZ-EP-RL7?
All AD7949SCPZ-EP-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7949SCPZ-EP-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 AD7949SCPZ-EP-RL7 part is unused and in its original packaging.
Return procedure for AD7949SCPZ-EP-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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