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Analog Devices Inc. AD7470ARUZ-REEL
- Part No.:
- AD7470ARUZ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AD7470ARUZ-REEL.pdf
- Description:
- IC ADC 10BIT SAR 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,386
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Product details
Overview
AD7470ARUZ-REEL from Analog Devices is a 10-bit, 1.75 MSPS successive approximation analog-to-digital converter (ADC) with parallel interface, operating from a single 2.7 V to 5.25 V supply. It features 33 pF input capacitance, ±1 LSB integral nonlinearity, and 60 dB SINAD at 500 kHz input frequency. It is used in high-speed data acquisition systems requiring low power and precise timing control via CONVST and BUSY signals.
For engineers reviewing the AD7470ARUZ-REEL datasheet, AD7470ARUZ-REEL pinout, AD7470ARUZ-REEL application, or AD7470ARUZ-REEL equivalent, key selection considerations include its 10-bit resolution, 12-clock-cycle conversion time, TSSOP-24 package, external 2.5 V reference requirement, and sleep-mode current of 1 µA - all critical for embedded signal conditioning and real-time sensor interfacing.
Technical Context
The AD7470ARUZ-REEL implements a standard successive approximation register (SAR) architecture with no pipeline delay, enabling deterministic sampling on the falling edge of CONVST and completion indication via BUSY. Its track-and-hold amplifier supports full-power bandwidth up to 20 MHz and acquisition time of 135 ns.
Conversion timing is fully clock-driven: 12 CLK IN cycles determine conversion time (e.g., 436 ns at 30 MHz), while throughput rate scales linearly with clock frequency. The part uses straight binary output coding and supports flexible power management via auto-sleep mode triggered by sustained low CONVST.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 10-bit - delivers 1024 discrete digital codes over 0 V to REF IN range, sufficient for medium-accuracy industrial sensing and motor control feedback. |
| Throughput Rate | 1.75 MSPS max at 5 V - enables real-time digitization of signals up to ~875 kHz Nyquist bandwidth without aliasing. |
| SINAD / SNR | 60 dB min at 500 kHz - ensures usable dynamic range for audio-band and instrumentation applications with moderate noise floor requirements. |
| Integral Nonlinearity | ±1 LSB max - guarantees monotonicity and ≤0.1% gain/offset error across full scale, critical for closed-loop control linearity. |
| Power Dissipation | 4.5 mW max at 3 V - allows battery-powered or thermally constrained designs to sustain >1 MSPS operation without active cooling. |
| Input Capacitance | 33 pF typ - defines required driver strength and anti-alias filter design; necessitates low-impedance source or buffer for <1 MHz signals. |
| Reference Input | 2.5 V ±1% - mandates precision external reference (e.g., ADR3425) for guaranteed DC accuracy; no internal reference provided. |
Pinout & Package
AD7470ARUZ-REEL is housed in a 24-lead TSSOP (RU-24) package with 0.65 mm lead pitch, optimized for compact PCB layouts and thermal performance (θJA = 115°C/W). Pin 1 is marked by a dot; pins 13 and 24 are NC (no connect).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONVST | Conversion Start Input | Falling-edge-triggered command initiates sample-and-hold hold mode and starts SAR conversion; minimum pulse width 10 ns. |
| BUSY | Conversion Status Output | Active-high open-drain signal indicates ongoing conversion; falls 436 ns after CONVST edge (at 30 MHz), signaling result readiness. |
| CS / RD | Parallel Interface Control | Interchangeable active-low inputs enabling three-state data bus access; both can be hardwired low for continuous output mode. |
| DB0–DB9 | Parallel Data Outputs | 10-bit straight binary outputs (LSB to MSB); driven by VDRIVE voltage, allowing independent logic-level interfacing (e.g., 5 V ADC core + 3 V FPGA I/O). |
| VIN | Analog Input | Single-ended input referenced to AGND; accepts 0 V to REF IN (2.5 V) range; high DC impedance minimizes loading on signal sources. |
| REF IN | External Reference Input | Accepts 2.5 V ±1% reference only; no internal reference; accuracy directly limits overall ADC absolute measurement error. |
| AVDD / DVDD | Analog & Digital Supplies | Must be matched within ±0.3 V; separate AGND/DGND planes required but tied at single point to minimize noise coupling. |
| VDRIVE | Output Driver Supply | Defines VOH level (VDRIVE – 0.2 V); decouples output logic swing from core supply, enabling mixed-voltage system interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | Enables precise, deterministic sampling instants via CONVST edge - essential for time-critical control loops and synchronized multi-channel acquisition. |
| Auto-sleep mode | Reduces average current to 1 µA when CONVST remains low post-conversion, extending battery life in intermittent-sampling applications like portable diagnostics. |
| Flexible supply scaling | Operates from 2.7 V to 5.25 V with proportional throughput and power - allows direct integration into 3.3 V or 5 V systems without level-shifting. |
| High-speed parallel interface | 10-bit data available within 3 ns of RD falling edge (t6), supporting direct connection to microcontroller GPIO or FPGA parallel capture logic. |
| Wide input bandwidth | 20 MHz full-power bandwidth supports digitization of fast transients and RF IF signals up to 10 MHz without external amplification. |
Applications
| Industrial Motor Control | Portable Medical Instrumentation |
|---|---|
|
Use Scenario: Real-time current and voltage sampling in servo drive inverters for field-oriented control (FOC) algorithms. IC Role / Device Role / Timing Role: ADC captures phase currents with 1.75 MSPS throughput and deterministic CONVST-to-BUSY latency for tight PWM synchronization. Use Value: ±1 LSB INL ensures torque ripple <0.5% across speed range; 33 pF input capacitance allows direct connection to isolated current sense amplifiers. |
Use Scenario: Battery-powered ECG front-end digitizing lead-II differential signals at 1 kSPS with on-demand high-resolution bursts. IC Role / Device Role / Timing Role: ADC operates in auto-sleep mode between samples, waking only on CONVST trigger to minimize quiescent current. Use Value: 1 µA sleep current extends AA battery life to >2 years; 60 dB SINAD preserves diagnostic fidelity for ST-segment analysis. |
| Automotive Sensor Signal Conditioning | Test & Measurement Data Loggers |
|
Use Scenario: Digitizing throttle position, manifold pressure, and knock sensor outputs in engine control units (ECUs) under 125°C ambient. IC Role / Device Role / Timing Role: ADC interfaces to 3.3 V microcontroller via VDRIVE = 3.3 V while AVDD = 5 V maximizes SNR in noisy engine bay environments. Use Value: Dual-supply isolation (AVDD/DVDD ≤0.3 V mismatch) suppresses ground bounce-induced errors; 20 MHz bandwidth captures knock resonance peaks. |
Use Scenario: Modular benchtop oscilloscope module capturing transient waveforms up to 500 kHz with minimal dead time between acquisitions. IC Role / Device Role / Timing Role: ADC uses external 2.5 V reference for calibrated amplitude accuracy and parallel interface for zero-wait-state data streaming to FPGA FIFO. Use Value: 12-clock conversion + 135 ns acquisition enables 1.75 MSPS sustained capture; straight binary coding simplifies real-time FFT processing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7470BRUZ-REEL | Same 10-bit SAR architecture and pinout, but rated for –40°C to +125°C (Y-grade) vs. A-grade (–40°C to +85°C) of AD7470ARUZ-REEL. | Required for under-hood automotive or industrial environments exceeding 85°C ambient. | Select AD7470BRUZ-REEL only if extended temperature operation is mandatory; otherwise AD7470ARUZ-REEL offers identical performance at lower cost. |
| ADS8320UB | 16-bit, 1 MSPS SAR ADC in MSOP-8; no parallel interface - uses SPI; higher resolution but lower speed and different packaging. | Suitable for precision, lower-throughput applications where board space is constrained and serial interface is acceptable. | Choose ADS8320UB when resolution >12 bits is needed and throughput ≤1 MSPS suffices; not a drop-in replacement due to interface and pinout incompatibility. |
Compared with AD7470BRUZ-REEL, the AD7470ARUZ-REEL trades extended temperature range for cost and availability advantages in commercial-grade systems; versus ADS8320UB, it prioritizes raw speed and parallel simplicity over resolution and footprint - making it optimal for real-time control where latency and deterministic timing dominate.
Availability
AD7470ARUZ-REEL is available at Aetrix Electronics and suitable for industrial motor control, portable medical instrumentation, automotive sensor signal conditioning, and test & measurement data loggers requiring stable component supply and long-term production continuity.
Supply support for AD7470ARUZ-REEL 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 AD7470ARUZ-REEL belongs to Analog Devices' precision high-speed SAR ADC product line, designed specifically for applications demanding low-latency, low-power, and deterministic conversion timing in resource-constrained embedded systems.
FAQ
What is the maximum clock frequency supported by AD7470ARUZ-REEL?
The AD7470ARUZ-REEL supports a maximum CLK IN frequency of 30 MHz at 5 V supply and 24 MHz at 3 V supply. At 30 MHz, conversion completes in 12 clock cycles (436 ns), enabling the full 1.75 MSPS throughput rate. Exceeding these frequencies violates timing specifications and may cause incorrect code output or increased INL.
Does AD7470ARUZ-REEL include an internal voltage reference?
No, the AD7470ARUZ-REEL requires an external 2.5 V ±1% reference applied to the REF IN pin. It does not contain an internal reference circuit. Using a precision reference such as the ADR3425 ensures guaranteed DC accuracy including ±1 LSB integral nonlinearity and ±2.5 LSB offset error over temperature.
How does the auto-sleep mode function in AD7470ARUZ-REEL?
In auto-sleep mode, the AD7470ARUZ-REEL automatically enters ultra-low-power state (1 µA typical) when CONVST remains low after BUSY goes low. The next rising edge of CONVST wakes the device within 1 µs. This mode is ideal for burst-mode acquisition in battery-powered devices where average current must be minimized between conversions.
Can AD7470ARUZ-REEL interface directly with a 3.3 V microcontroller while running on 5 V analog supply?
Yes - the AD7470ARUZ-REEL supports independent supply domains: AVDD can be 5 V for optimal analog performance (SNR, bandwidth), while VDRIVE is set to 3.3 V to establish VOH = 3.1 V for safe interfacing with 3.3 V logic. DVDD must still match AVDD within ±0.3 V, but output drivers are isolated via VDRIVE.
What is the purpose of the NC pins on AD7470ARUZ-REEL?
Pins 13 and 24 of the AD7470ARUZ-REEL (TSSOP-24) are designated NC (No Connect) and must remain unconnected. These pins have no internal bond wire or circuit connection. Routing traces or applying solder to them risks shorting adjacent pins or compromising thermal/mechanical integrity of the package during reflow.
AD7470ARUZ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 10
- Sampling Rate (Per Second):
- 1.75M
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7470ARUZ-REEL FAQ
1.How can I place an order for AD7470ARUZ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7470ARUZ-REEL 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 AD7470ARUZ-REEL reliable?
The price and inventory of AD7470ARUZ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7470ARUZ-REEL is usually 5 days.
3.What payment methods are accepted for AD7470ARUZ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7470ARUZ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7470ARUZ-REEL?
AD7470ARUZ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7470ARUZ-REEL 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 AD7470ARUZ-REEL?
For technical support, including AD7470ARUZ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7470ARUZ-REEL requirements.
6.How does Aetrix verify that AD7470ARUZ-REEL is sourced from the original manufacturer or authorized distributors?
All AD7470ARUZ-REEL 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 AD7470ARUZ-REEL meets industry standards.
7.What is the process for return or replacement of AD7470ARUZ-REEL?
All AD7470ARUZ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7470ARUZ-REEL, 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 AD7470ARUZ-REEL part is unused and in its original packaging.
Return procedure for AD7470ARUZ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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