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Analog Devices Inc. AD7476ABKS-REEL7
- Part No.:
- AD7476ABKS-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
AD7476ABKS-REEL7.pdf
- Description:
- IC ADC 12BIT 1MSPS SC70-6 T/R
- Quantity:
- Payment:
- Shipping:
Inventory:14,545
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Product details
Overview
AD7476ABKS-REEL7 from Analog Devices is a 12-bit, single-supply, successive-approximation analog-to-digital converter (ADC) in a 6-lead SC70 package. It delivers 1 MSPS throughput at 2.35 V to 5.25 V supply, achieves 71 dB SNR at 100 kHz input, and features no pipeline delay with SPI/QSPI/MICROWIRE-compatible serial interface. It serves as the primary digitizer in portable medical sensors requiring high fidelity at ultra-low power.
For engineers reviewing the AD7476ABKS-REEL7 datasheet, AD7476ABKS-REEL7 pinout, AD7476ABKS-REEL7 application, or AD7476ABKS-REEL7 equivalent, key selection criteria include guaranteed 12-bit resolution with ±1.5 LSB INL, SC70 footprint constraints, 1 µA standby current, and VDD-referenced 0 V to VDD input range - all critical for battery-powered instrumentation design.
Technical Context
The AD7476ABKS-REEL7 implements a standard successive-approximation register (SAR) architecture with integrated track-and-hold amplifier, sampling on the falling edge of CS and initiating conversion simultaneously. Its internal reference is derived directly from VDD, eliminating external reference components and fixing the full-scale input range to 0 V to VDD.
Conversion timing is fully synchronous to SCLK: 16 clock cycles required (800 ns max at 20 MHz), with 250 ns maximum acquisition time and 50 ns minimum quiet time between conversions. The device supports flexible serial clock speeds from 10 kHz to 20 MHz, enabling dynamic power scaling via clock gating during idle periods.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees monotonic output with no missing codes across full temperature range. |
| Throughput Rate | 1 MSPS - enables real-time capture of signals up to 500 kHz Nyquist bandwidth. |
| SNR @ 100 kHz | 71 dB min - supports >11.5 effective number of bits (ENOB) for precision sensor digitization. |
| Supply Range | 2.35 V to 5.25 V - allows direct operation from single Li-ion cell (3.0–4.2 V) or 3.3 V/5 V rails. |
| Standby Current | 1 µA max - reduces quiescent power to 3.3 nW at 3.3 V, extending battery life in sleep-mode systems. |
| INL | ±1.5 LSB max - ensures linearity error remains under ±0.037% of full scale for calibration-sensitive applications. |
| Package | 6-lead SC70 (2.0 mm × 1.25 mm × 0.9 mm) - provides smallest footprint among 12-bit 1 MSPS ADCs for space-constrained PCBs. |
Pinout & Package
AD7476ABKS-REEL7 is housed in a 6-lead SC70 package (JEDEC MO-203AA), with exposed pad not electrically connected. The package supports reflow soldering per JEDEC J-STD-020D, with Pb-free peak temperature of 255°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CS) | Chip Select | Active-low control that initiates sampling on falling edge and frames 16-bit serial output (4 leading zeros + 12 data bits). |
| 2 (SCLK) | Serial Clock | Input clock driving both conversion timing (16 cycles) and SDATA bit transfer; supports 10 kHz–20 MHz range. |
| 3 (SDATA) | Serial Data Output | Three-state CMOS output delivering MSB-first conversion result; high-impedance when CS is high. |
| 4 (VIN) | Analog Input | Single-ended input with 0 V to VDD range, 20 pF input capacitance, and ±0.5 µA leakage - requires low-impedance source ≤130 Ω for full performance. |
| 5 (GND) | Analog Ground | Dedicated ground reference for analog circuitry; must be connected to clean system AGND plane, separate from digital return paths. |
| 6 (VDD) | Power Supply | Single 2.35–5.25 V supply powering both analog core and digital interface; also serves as internal reference voltage. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True SAR architecture enables deterministic latency (≤800 ns) and precise sampling control via CS edge - essential for closed-loop timing-critical systems. |
| VDD-referenced conversion | Eliminates need for external reference IC or resistor divider, reducing BOM count and layout area while maintaining 0 V to VDD input compliance. |
| Flexible serial clock management | Conversion rate scales linearly with SCLK frequency (10 kHz–20 MHz), allowing dynamic power reduction by lowering clock speed during low-throughput intervals. |
| Ultra-low standby power | 1 µA max shutdown current (50 nA typical) enables microamp-level system sleep states without sacrificing wake-up responsiveness. |
| SC70 package integration | First 12-bit 1 MSPS ADC in 6-lead SC70 - saves >60% board area versus MSOP-8 alternatives while maintaining thermal resistance (θJA = 340.2°C/W). |
Applications
| Portable ECG Monitor | Wireless Sensor Node |
|---|---|
|
Use Scenario: Digitizing low-amplitude biopotential signals (0.5–5 mV) from dry electrodes in handheld ECG devices powered by coin-cell batteries. IC Role / Device Role / Timing Role: Primary analog front-end digitizer with precise sampling instant controlled by microcontroller's CS signal; operates at 1 MSPS to oversample 100 Hz cardiac waveforms. Use Value: 71 dB SNR preserves diagnostic signal integrity; 1 µA standby current extends battery life to >1 year in intermittent measurement mode. |
Use Scenario: Capturing temperature, humidity, and acceleration data in battery-operated industrial IoT nodes transmitting via BLE every 10 seconds. IC Role / Device Role / Timing Role: Low-power ADC interfacing directly to MCU GPIOs via 3-wire SPI; enters full power-down between readings to minimize average current. Use Value: VDD-referenced input eliminates external reference, reducing component count; SC70 footprint enables compact 12 mm × 12 mm node PCB. |
| Optical Pulse Oximeter | Handheld Multimeter Front-End |
|
Use Scenario: Simultaneous sampling of red and infrared photodiode currents (0–2.5 V range) in wearable SpO₂ sensors using time-division multiplexing. IC Role / Device Role / Timing Role: Dual-channel digitizer (with external analog mux) providing synchronized 12-bit samples at 500 kSPS effective rate for AC/DC ratio calculation. Use Value: 13.5 MHz full-power bandwidth supports fast LED switching transients; ±1.5 LSB INL ensures accurate saturation percentage computation. |
Use Scenario: High-accuracy DC voltage and current measurement in handheld DMMs where size, battery life, and 12-bit resolution are mandatory. IC Role / Device Role / Timing Role: Precision digitizer for autoranging analog front-end, operating from 3.3 V supply with internal reference tracking battery voltage drift. Use Value: Guaranteed no missing codes and ±0.037% linearity enable true 12-bit accuracy without firmware correction; SC70 package fits within tight mechanical envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822UID | 12-bit, 200 kSPS, 8-pin SOIC; requires external reference; 2.7–5.25 V supply; 1.25 mW at 200 kSPS. | Lower throughput and larger package limit use in high-speed portable designs; external reference adds cost and layout complexity. | Select when lower sampling rate suffices and SOIC assembly is preferred over SC70 reflow. |
| MAX1116EKA+T | 12-bit, 1 MSPS, SOT23-6; internal reference; 2.7–3.6 V only; 1.5 µA standby; 12.5 mW at 1 MSPS (3 V). | Narrower supply range excludes 5 V or Li-ion full-range operation; higher active power than AD7476ABKS-REEL7 at 3 V (5.1 mW vs. 5.1 mW - matched). | Select for 3 V-only systems prioritizing lowest possible footprint (SOT23-6 is marginally smaller) and where 5 V compatibility is unnecessary. |
Compared with ADS7822UID and MAX1116EKA+T, AD7476ABKS-REEL7 uniquely combines 1 MSPS throughput, 2.35–5.25 V operation, SC70 packaging, and sub-µA standby in a single device - making it optimal for next-generation ultra-compact, multi-voltage battery-powered instrumentation.
Availability
AD7476ABKS-REEL7 is available at Aetrix Electronics and suitable for portable medical instruments, wireless sensor nodes, optical pulse oximeters, and handheld multimeters requiring stable component supply across automotive-grade temperature ranges (–40°C to +85°C).
Supply support for AD7476ABKS-REEL7 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 AD7476A series belongs to Analog Devices' precision SAR ADC product line, engineered specifically for space- and power-constrained portable instrumentation where 12-bit accuracy, 1 MSPS speed, and minimal external components are mandatory.
FAQ
What is the absolute maximum supply voltage for AD7476ABKS-REEL7?
The absolute maximum VDD rating for AD7476ABKS-REEL7 is +7 V, but operational specifications are guaranteed only between 2.35 V and 5.25 V. Exceeding 5.25 V may cause parametric degradation or latch-up, and operation above 7 V risks permanent damage per the Absolute Maximum Ratings table.
Does AD7476ABKS-REEL7 require an external reference voltage?
No, AD7476ABKS-REEL7 uses an internal reference derived from VDD, resulting in a 0 V to VDD analog input range. This eliminates the need for external reference ICs or resistive dividers, simplifying design and reducing bill-of-materials cost.
How many serial clock cycles are needed to read a complete conversion from AD7476ABKS-REEL7?
AD7476ABKS-REEL7 requires exactly 16 SCLK cycles per conversion: four leading zeros followed by 12 bits of valid data, transmitted MSB first on the falling edge of SCLK. The conversion completes within 800 ns at 20 MHz SCLK.
What is the guaranteed integral nonlinearity (INL) specification for AD7476ABKS-REEL7?
AD7476ABKS-REEL7 has a guaranteed INL of ±1.5 LSB maximum across its full operating temperature range (–40°C to +85°C) and supply range (2.35 V to 5.25 V), ensuring monotonic behavior and no missing codes at 12-bit resolution.
Can AD7476ABKS-REEL7 operate from a 2.0 V supply?
AD7476ABKS-REEL7 is specified for operation down to 2.35 V. While functional operation may occur at 2.0 V per footnote 2 in the datasheet, key parameters including INL, SNR, and throughput are not guaranteed below 2.35 V - design validation at 2.0 V requires full characterization.
AD7476ABKS-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- -
- Input Type:
- -
- Data Interface:
- SPI, DSP
- Configuration:
- -
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- -
- Reference Type:
- -
- Voltage - Supply, Analog:
- -
- Voltage - Supply, Digital:
- -
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- SC-70-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7476ABKS-REEL7 FAQ
1.How can I place an order for AD7476ABKS-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7476ABKS-REEL7 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 AD7476ABKS-REEL7 reliable?
The price and inventory of AD7476ABKS-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7476ABKS-REEL7 is usually 5 days.
3.What payment methods are accepted for AD7476ABKS-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7476ABKS-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7476ABKS-REEL7?
AD7476ABKS-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7476ABKS-REEL7 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 AD7476ABKS-REEL7?
For technical support, including AD7476ABKS-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7476ABKS-REEL7 requirements.
6.How does Aetrix verify that AD7476ABKS-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD7476ABKS-REEL7 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 AD7476ABKS-REEL7 meets industry standards.
7.What is the process for return or replacement of AD7476ABKS-REEL7?
All AD7476ABKS-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7476ABKS-REEL7, 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 AD7476ABKS-REEL7 part is unused and in its original packaging.
Return procedure for AD7476ABKS-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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