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Analog Devices Inc. AD7490SRUZ-EP-RL7
- Part No.:
- AD7490SRUZ-EP-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7490SRUZ-EP-RL7.pdf
- Description:
- IC ADC 12BIT 1MSPS 16CH 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:358
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Product details
Overview
AD7490SRUZ-EP-RL7 from Analog Devices is a 12-bit, 16-channel, 1 MSPS successive approximation ADC with integrated channel sequencer, operating from a single 4.75 V to 5.25 V supply and delivering 69.5 dB SNR at 50 kHz input frequency. It features full shutdown mode (0.5 µA max), SPI/QSPI/MICROWIRE/DSP-compatible serial interface, and is housed in a 28-lead TSSOP for high-density data acquisition in harsh environments.
For engineers reviewing the AD7490SRUZ-EP-RL7 datasheet, AD7490SRUZ-EP-RL7 pinout, AD7490SRUZ-EP-RL7 application, or AD7490SRUZ-EP-RL7 equivalent, key selection criteria include military-grade temperature range (−55°C to +125°C), sequenced 16-channel single-ended analog input capability, VDRIVE logic-level independence (2.7 V to 5.25 V), no pipeline delay, and enhanced product qualification per AQEC standards.
Technical Context
The AD7490SRUZ-EP-RL7 implements a successive approximation register (SAR) architecture with on-chip track-and-hold, enabling precise sampling of wide-bandwidth signals up to 8.2 MHz full-power bandwidth. Conversion timing is fully synchronized to the SCLK input, requiring exactly 16 clock cycles per conversion with no latency between CS assertion and result availability.
Its sequencer supports preprogrammed channel cycling via ADD3–ADD0 address bits and SEQ/SHADOW control register bits, while the RANGE bit selects either 0 V to REFIN or 0 V to 2 × REFIN input range-each configurable with straight binary or twos complement output coding. VDRIVE decouples digital I/O voltage from VDD, allowing direct interfacing with 3 V or 5 V host processors without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR ADC providing 4096 discrete output codes for precision measurement |
| Throughput Rate | 1 MSPS maximum - enables real-time sampling of fast transients in defense/aerospace sensor systems |
| SNR @ 50 kHz | 69.5 dB typical - supports accurate digitization of medium-frequency analog signals with low noise floor |
| Input Channels | 16 single-ended inputs with hardware sequencer - eliminates external multiplexer and timing logic in multi-sensor monitoring |
| Operating Temperature | −55°C to +125°C - qualified for extended-range operation in space, avionics, and downhole industrial equipment |
| Power Consumption | 12.5 mW at 1 MSPS / 0.5 µA in full shutdown - enables low-duty-cycle battery-powered telemetry nodes |
| VDRIVE Range | 2.7 V to 5.25 V - permits direct connection to mixed-voltage FPGA or DSP I/O banks without level translators |
Pinout & Package
AD7490SRUZ-EP-RL7 is packaged in a 28-lead Thin Shrink Small Outline Package (TSSOP, RU-28), JEDEC MO-153-AE compliant, with 0.65 mm lead pitch and exposed thermal pad not present. All NC pins (Pins 4, 11, 12, 18) must be connected directly to AGND per datasheet guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 20) | Chip Select | Active-low signal that initiates conversion and frames serial data transfer; sampling occurs on falling edge |
| DIN (Pin 19) | Data Input | Serial control word entry point for configuring RANGE, CODING, SEQ, and SHADOW bits on SCLK falling edges |
| DOUT (Pin 15) | Data Output | Three-state serial output delivering 4-bit channel address + 12-bit conversion result MSB-first |
| SCLK (Pin 16) | Serial Clock | Master clock for both serial communication and internal conversion timing; 10 kHz–20 MHz operation |
| VIN0–VIN15 (Pins 13–1, 25–28) | Analog Inputs | 16 single-ended channels multiplexed into internal T/H; unused channels must tie to AGND to prevent noise coupling |
| REFIN (Pin 23) | Reference Input | Accepts 2.5 V ±1% external reference; sets full-scale range for both 0–REFIN and 0–2×REFIN modes |
| VDRIVE (Pin 17) | Logic Supply | Defines digital I/O voltage threshold independently of VDD - enables 3 V processor interfacing even when VDD = 5 V |
| AGND (Pins 14, 21, 24) | Analog Ground | Common reference for all analog circuitry, REFIN, and VINx; requires low-impedance star connection to system ground |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Guarantees deterministic conversion latency of exactly 16 × tSCLK - essential for time-critical closed-loop control |
| Channel sequencer | Hardware-programmable sequence register allows autonomous cycling through up to 16 user-defined channels without host intervention |
| VDRIVE logic independence | Enables direct connection to 3 V or 5 V microcontrollers/FPGAs without external level shifters or voltage translation circuitry |
| Enhanced product qualification | Manufactured under controlled baseline with single fab/assembly/test site, AQEC-compliant documentation, and military temperature screening |
| Low power shutdown | Full shutdown draws ≤0.5 µA - extends battery life in intermittent-sampling applications such as remote condition monitoring |
Applications
| Avionics Sensor Data Acquisition | Downhole Oil & Gas Instrumentation |
|---|---|
Use Scenario: Real-time collection of pressure, temperature, and vibration signals from multiple engine-mounted sensors in jet aircraft. IC Role / Device Role / Timing Role: 16-channel SAR ADC with sequencer performs synchronized sampling across critical flight parameters at 1 MSPS. Use Value: −55°C to +125°C operation ensures reliability during extreme altitude thermal cycling; no pipeline delay enables immediate response to fault conditions. | Use Scenario: Multi-point downhole logging tool measuring resistivity, gamma ray, and acoustic waveforms in high-temperature boreholes. IC Role / Device Role / Timing Role: High-accuracy 12-bit digitizer acquiring analog outputs from ruggedized geophysical transducers in confined, thermally stressed environments. Use Value: Enhanced product qualification guarantees long-term stability under sustained 125°C operation; 69.5 dB SNR preserves signal fidelity in noisy drilling environments. |
| Spacecraft Power System Monitoring | Tactical Radar Front-End Digitization |
Use Scenario: Continuous monitoring of bus voltage, current, and thermal sensors across satellite power distribution units. IC Role / Device Role / Timing Role: Low-power, radiation-tolerant ADC converting telemetry signals with minimal interrupt overhead via sequenced channel reads. Use Value: 0.5 µA full shutdown mode conserves limited spacecraft battery capacity during dormant phases; VDRIVE compatibility simplifies integration with 3 V rad-hard FPGAs. | Use Scenario: Digitizing intermediate frequency (IF) signals from radar receiver chains prior to digital beamforming. IC Role / Device Role / Timing Role: Wide-input-bandwidth (8.2 MHz FPBW) ADC capturing pulsed IF waveforms with high dynamic range and low distortion. Use Value: 70.5 dB SINAD and −86 dB SFDR preserve radar resolution and clutter rejection; single-supply 5 V operation reduces power supply complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, multi-channel SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7492BRUZ | Commercial-grade (−40°C to +85°C), same 12-bit/1 MSPS spec but lacks EP qualification, sequencer, and VDRIVE pin | Not suitable for aerospace/defense deployments requiring extended temperature or AQEC compliance | Select only for cost-sensitive industrial controls where military specs are unnecessary |
| ADS8688IPWR | 8-channel, 16-bit, 1 MSPS, integrated reference and programmable input range; no sequencer; operates from 2.7 V to 5.5 V | Higher resolution but fewer channels; lacks military temp rating and EP traceability | Prefer when absolute accuracy > channel count, and system design tolerates absence of hardware sequencing |
Compared with AD7490SRUZ-EP-RL7, AD7492BRUZ omits military qualification and sequencer functionality, limiting use to benign environments, while ADS8688IPWR trades channel count and EP assurance for higher resolution and integrated reference-making it viable only where 16-channel autonomy is noncritical.
Availability
AD7490SRUZ-EP-RL7 is available at Aetrix Electronics and suitable for avionics sensor acquisition, downhole instrumentation, spacecraft telemetry, and tactical radar front-end digitization requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7490SRUZ-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, headquartered in Norwood, MA, with design and manufacturing facilities worldwide.
The AD7490-EP product line delivers radiation-tolerant, temperature-extended, and AQEC-qualified data converters for mission-critical defense, aerospace, and industrial systems where reliability and long-term supply assurance are mandatory.
FAQ
What is the guaranteed integral nonlinearity (INL) specification for AD7490SRUZ-EP-RL7?
The AD7490SRUZ-EP-RL7 has a guaranteed integral nonlinearity of ±1 LSB over its full operating temperature range of −55°C to +125°C, as specified in the Enhanced Product Ordering Guide and confirmed in Table 1 of the Rev. B datasheet. This INL performance ensures monotonicity and predictable code transitions across all 4096 output levels, critical for closed-loop feedback accuracy in aerospace control systems using the AD7490SRUZ-EP-RL7.
Does AD7490SRUZ-EP-RL7 support both straight binary and twos complement output coding?
Yes, the AD7490SRUZ-EP-RL7 supports both output coding formats via the CODING bit in its control register: straight binary for 0 V to REFIN or 0 V to 2 × REFIN input ranges, and twos complement for −REFIN to +REFIN bipolar operation when the RANGE bit is set to 0. This flexibility allows the AD7490SRUZ-EP-RL7 to interface seamlessly with DSPs and FPGAs expecting either coding scheme without external logic.
How does the VDRIVE pin function in AD7490SRUZ-EP-RL7, and why is it important?
The VDRIVE pin on the AD7490SRUZ-EP-RL7 sets the logic threshold voltage for all digital I/O pins (CS, DIN, DOUT, SCLK), independent of the analog supply VDD. It accepts 2.7 V to 5.25 V, enabling direct connection to 3 V or 5 V host processors without level-shifting components. This feature simplifies board layout and improves signal integrity in mixed-voltage systems using the AD7490SRUZ-EP-RL7, especially in FPGA-based avionics modules.
What is the minimum quiet time required between conversions for AD7490SRUZ-EP-RL7?
The AD7490SRUZ-EP-RL7 requires a minimum quiet time (tQUIET) of 50 ns between bus relinquishment and the start of the next conversion, as defined in Table 2 of the Rev. B datasheet. This timing constraint ensures proper three-state recovery of the DOUT pin and prevents data corruption during back-to-back conversions - a critical consideration when implementing high-throughput burst-mode acquisition with the AD7490SRUZ-EP-RL7.
Can AD7490SRUZ-EP-RL7 operate with an external reference other than 2.5 V?
The AD7490SRUZ-EP-RL7 is specified for optimal performance with a 2.5 V ±1% external reference applied to the REFIN pin, as stated in the "REFERENCE INPUT" section of the datasheet. While the device accepts REFIN voltages within the absolute maximum rating (−0.3 V to VDD + 0.3 V), deviation from 2.5 V degrades gain error match and SNR; therefore, 2.5 V remains the recommended and validated reference voltage for the AD7490SRUZ-EP-RL7 in production systems.
AD7490SRUZ-EP-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 16
- Input Type:
- Single Ended
- Data Interface:
- DSP, MICROWIRE™, QSPI™, and SPI™
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.25V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Supplier Device Package:
- 28-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7490SRUZ-EP-RL7 FAQ
1.How can I place an order for AD7490SRUZ-EP-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7490SRUZ-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 AD7490SRUZ-EP-RL7 reliable?
The price and inventory of AD7490SRUZ-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 AD7490SRUZ-EP-RL7 is usually 5 days.
3.What payment methods are accepted for AD7490SRUZ-EP-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7490SRUZ-EP-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7490SRUZ-EP-RL7?
AD7490SRUZ-EP-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7490SRUZ-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 AD7490SRUZ-EP-RL7?
For technical support, including AD7490SRUZ-EP-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7490SRUZ-EP-RL7 requirements.
6.How does Aetrix verify that AD7490SRUZ-EP-RL7 is sourced from the original manufacturer or authorized distributors?
All AD7490SRUZ-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 AD7490SRUZ-EP-RL7 meets industry standards.
7.What is the process for return or replacement of AD7490SRUZ-EP-RL7?
All AD7490SRUZ-EP-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7490SRUZ-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 AD7490SRUZ-EP-RL7 part is unused and in its original packaging.
Return procedure for AD7490SRUZ-EP-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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