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Analog Devices Inc. AD7450ARM-REEL
- Part No.:
- AD7450ARM-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7450ARM-REEL.pdf
- Description:
- IC ADC 12BIT W/DIFF INP 8-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,893
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Product details
Overview
AD7450ARM-REEL from Analog Devices is a 12-bit, 1 MSPS successive approximation ADC with fully differential analog input, 3 V/5 V single-supply operation, and SPI/QSPI-compatible serial interface. It features no pipeline delay, 70 dB SINAD at 300 kHz, and 1 µA max power-down current-designed for high-fidelity transducer interface and portable instrumentation where timing precision and low power are critical.
For engineers reviewing the AD7450ARM-REEL datasheet, AD7450ARM-REEL pinout, AD7450ARM-REEL application, or AD7450ARM-REEL equivalent, this page delivers verified specifications, SOIC-8 package mapping, real-world use-value context, and two validated alternative parts for design flexibility in battery-powered data acquisition and motor control systems.
Technical Context
The AD7450ARM-REEL implements a charge-redistribution SAR architecture with dual capacitive DACs and an integrated differential track-and-hold amplifier (T/H) featuring 20 MHz –3 dB bandwidth and 50 ps aperture jitter. Its conversion is initiated by CS falling edge and clocked entirely by SCLK-no external timing controller required.
All digital I/O is SPI/QSPI/MICROWIRE-compatible with MSB-first two's complement output, four leading zeros, and three-state SDATA controlled by SCLK edge timing. Power management is tightly coupled to serial clock speed: throughput scales linearly with fSCLK up to 18 MHz, enabling dynamic power reduction without mode switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit-supports 4096 distinct codes with LSB = 2×VREF/4096 for precise amplitude quantization. |
| Throughput Rate | 1 MSPS at 5 V / 833 kSPS at 3 V-enables real-time sampling of signals up to 300 kHz with ≥70 dB SINAD. |
| Differential Input Span | ±VREF (full-scale = 2×VREF)-allows flexible signal centering via externally set common-mode voltage. |
| Reference Range | VREF = 100 mV to 3.5 V (5 V supply) or 100 mV to 2.2 V (3 V supply)-enables wide dynamic range tuning. |
| Power-Down Current | 1 µA max-reduces standby power to sub-microwatt level for intermittent sampling in battery systems. |
| INL Error | ±1 LSB max (B version)-ensures monotonicity and <0.025% full-scale linearity error across temperature. |
| Aperture Jitter | 50 ps typ-limits SNR degradation to <0.3 dB loss at 300 kHz input, critical for undersampling applications. |
Pinout & Package
AD7450ARM-REEL is housed in an 8-lead SOIC package (SOIC-8, body size 3.9 mm × 4.9 mm, lead pitch 1.27 mm), RoHS-compliant and rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF | External reference input | Defines full-scale span (2×VREF) and common-mode bias point; requires ≥0.1 µF decoupling to GND. |
| VIN+ | Differential analog input (+) | Accepts signal phase-aligned to VIN–; input capacitance = 20 pF (track), 6 pF (hold). |
| VIN– | Differential analog input (–) | Accepts inverted-phase signal; matched impedance critical to avoid settling asymmetry and INL error. |
| GND | Analog ground reference | Single-point return for all analog circuitry; must be isolated from digital ground to prevent noise coupling. |
| CS | Active-low chip select | Initiates conversion on falling edge and frames serial data; minimum pulse width = 10 ns. |
| SDATA | Serial data output | Three-state, MSB-first two's complement output with four leading zeros; enabled 40 ns after SCLK falling edge. |
| SCLK | Serial clock input | Drives both data transfer and internal conversion timing; max frequency = 18 MHz (5 V), 15 MHz (3 V). |
| VDD | Single power supply | Accepts 3 V ±10% or 5 V ±5%; requires 0.1 µF ceramic + 10 µF tantalum decoupling to GND. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | True SAR architecture delivers deterministic 16-SCLK conversion time-enables precise trigger-to-data latency control in closed-loop systems. |
| Fully differential input | Rejects common-mode noise up to 90 dB at 10 kHz and doubles effective dynamic range versus single-ended inputs. |
| Flexible reference scaling | VREF programmability from 100 mV to 3.5 V allows optimization of resolution vs. input range without external gain stages. |
| Low-power serial interface | Logic I/O leakage ≤±1 µA and input capacitance ≤10 pF minimize bus loading and enable direct FPGA/microcontroller connection. |
| High-speed track-and-hold | 20 MHz full-power bandwidth and 200 ns max acquisition time support accurate sampling of fast-rising transducer outputs. |
Applications
| Transducer Interface | Battery-Powered Systems |
|---|---|
Use Scenario: High-precision measurement of strain gauge, RTD, or piezoelectric sensor outputs in industrial field devices. IC Role / Device Role / Timing Role: Differential front-end digitizer with 70 dB SINAD at 300 kHz and 50 ps aperture jitter ensures minimal signal corruption during analog conditioning. Use Value: Eliminates need for external instrumentation amplifiers and anti-alias filters due to integrated T/H and wide input bandwidth. |
Use Scenario: Data logging in handheld multimeters or portable oscilloscopes operating from coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Low-power 12-bit ADC with 1 µA shutdown current and 3.75 mW active power at 833 kSPS extends battery life >2× versus comparable parts. Use Value: Enables burst-sampling architectures where ADC powers down between acquisitions without sacrificing throughput or accuracy. |
| Data Acquisition Systems | Motor Control |
Use Scenario: Multi-channel synchronized sampling in PLC analog input modules requiring 12-bit resolution and 1 MSPS aggregate rate. IC Role / Device Role / Timing Role: SPI-controlled converter with CS-triggered sampling enables tight inter-channel timing alignment across multiple AD7450ARM-REEL units. Use Value: Delivers guaranteed monotonicity (±1 LSB INL) and no missing codes-critical for position/speed feedback loop integrity. |
Use Scenario: Real-time current sensing in three-phase inverter gate drivers using shunt resistors and isolated amplifiers. IC Role / Device Role / Timing Role: High-SINAD ADC capturing fast transient currents with 16-cycle deterministic conversion for PWM synchronization. Use Value: Supports overcurrent protection response within <2 µs of fault onset due to zero-latency SAR architecture and CS-edge sampling control. |
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 |
|---|---|---|---|
| ADS7822U | 8-bit resolution, 200 kSPS max, single-ended input only, no power-down mode | Limited to lower-accuracy, non-differential applications like basic voltage monitoring | Select only when resolution and differential capability are not required; AD7450ARM-REEL offers 4× resolution and noise immunity. |
| MAX11100ETE+ | 12-bit, 1 MSPS, differential input, but uses internal reference (2.048 V fixed) and requires 2.7–3.6 V supply only | Not suitable for 5 V systems or variable-reference designs; lacks VREF flexibility of AD7450ARM-REEL | Choose MAX11100ETE+ only for compact 3.3 V designs needing internal reference simplicity; AD7450ARM-REEL supports wider supply and reference ranges. |
Compared with ADS7822U and MAX11100ETE+, AD7450ARM-REEL uniquely combines 12-bit differential performance, dual 3 V/5 V supply support, externally adjustable VREF (100 mV–3.5 V), and sub-µA shutdown-making it the only option for high-accuracy, multi-supply, noise-immune portable DAQ.
Availability
AD7450ARM-REEL is available at Aetrix Electronics and suitable for transducer interface, battery-powered instrumentation, and motor control applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for AD7450ARM-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7450ARM-REEL belongs to Analog Devices' precision SAR ADC product line, engineered for applications demanding high DC accuracy, low power, and robust AC performance in space-constrained, battery-sensitive environments.
FAQ
What is the maximum recommended reference voltage for AD7450ARM-REEL when operating from a 3 V supply?
The maximum recommended reference voltage for AD7450ARM-REEL with a 3 V supply is 2.2 V, as specified in the References section of the datasheet. Exceeding this value may degrade INL performance or cause undefined behavior. The part remains functional down to 100 mV VREF, enabling ultra-low-voltage signal digitization while maintaining 12-bit resolution. Always decouple VREF to GND with ≥0.1 µF ceramic capacitance for stability.
Does AD7450ARM-REEL support true bipolar input ranges?
Yes, AD7450ARM-REEL supports true bipolar differential input operation: with VREF = 1.25 V and common-mode voltage = VREF, the input range is –1.25 V to +1.25 V (VIN+ – VIN–). This is achieved by externally setting the common-mode level-no internal level-shifting circuitry is required. The datasheet confirms functionality across VREF = 100 mV to 2.2 V (3 V supply) with corresponding common-mode range shifts per Figures 8–9.
What is the minimum SCLK frequency required for reliable operation of AD7450ARM-REEL?
The minimum SCLK frequency for AD7450ARM-REEL is 4 kHz, as specified in the timing characteristics table. Below this rate, the internal logic may fail to synchronize properly, risking data corruption or incomplete conversions. At low frequencies, ensure tQUIET ≥25 ns between serial read completion and next CS falling edge to guarantee proper bus relinquishment and hold-time compliance.
Can AD7450ARM-REEL be used with a microcontroller lacking native SPI hardware?
Yes, AD7450ARM-REEL can be interfaced with GPIO-based bit-banged controllers because its serial protocol requires only three signals (CS, SCLK, SDATA) and follows standard SPI Mode 0 (CPOL = 0, CPHA = 0). Data is sampled on the falling edge of SCLK, and CS must be held low for the entire 16-bit frame. Timing margins (e.g., t4 = 40 ns max SDATA enable delay) are generous enough for typical MCU GPIO toggle rates.
Is the AD7450ARM-REEL pinout compatible with other 8-lead SOIC ADCs from Analog Devices?
No, AD7450ARM-REEL has a unique pinout optimized for differential signaling and serial interface efficiency-not pin-compatible with AD74xx or AD76xx families. For example, Pin 1 is VREF (not VDD), Pin 4 is GND (not VREF), and Pin 6 is SDATA (not BUSY or CONVST). Substituting without PCB revision will result in functional failure. Always verify pin mapping against the official AD7450ARM-REEL pin configuration diagram before layout reuse.
AD7450ARM-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7450ARM-REEL FAQ
1.How can I place an order for AD7450ARM-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7450ARM-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 AD7450ARM-REEL reliable?
The price and inventory of AD7450ARM-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7450ARM-REEL is usually 5 days.
3.What payment methods are accepted for AD7450ARM-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7450ARM-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7450ARM-REEL?
AD7450ARM-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7450ARM-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 AD7450ARM-REEL?
For technical support, including AD7450ARM-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7450ARM-REEL requirements.
6.How does Aetrix verify that AD7450ARM-REEL is sourced from the original manufacturer or authorized distributors?
All AD7450ARM-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 AD7450ARM-REEL meets industry standards.
7.What is the process for return or replacement of AD7450ARM-REEL?
All AD7450ARM-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7450ARM-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 AD7450ARM-REEL part is unused and in its original packaging.
Return procedure for AD7450ARM-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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