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Analog Devices Inc. AD7450BRM-REEL
- Part No.:
- AD7450BRM-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7450BRM-REEL.pdf
- Description:
- IC ADC 12BIT W/DIFF INP 8-MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,138
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Product details
Overview
AD7450BRM-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 20 MHz full-power bandwidth - enabling high-fidelity signal acquisition in battery-powered data loggers and motor control feedback loops.
For engineers reviewing the AD7450BRM-REEL datasheet, AD7450BRM-REEL pinout, AD7450BRM-REEL application, or AD7450BRM-REEL equivalent, this page delivers verified specifications, SOIC-8 package mapping, functional pin roles, real-world use cases, and two validated alternative parts for transducer interface and portable instrumentation designs.
Technical Context
The AD7450BRM-REEL implements a charge-redistribution SAR architecture with dual capacitive DACs and an integrated differential track-and-hold amplifier. Its conversion is initiated by CS falling edge and clocked by SCLK, eliminating pipeline latency and supporting deterministic timing control.
It accepts externally applied reference voltage (100 mV–3.5 V), enabling flexible input span configuration (±VREF differential) and common-mode biasing. Input signals are sampled on CS fall, and the serial output delivers 16-bit words: four leading zeros followed by 12-bit two's complement data MSB-first.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete codes for precision measurement of analog sensor outputs. |
| Throughput Rate | 1 MSPS at 5 V / 833 kSPS at 3 V - supports real-time sampling of fast-changing motor currents or communication channel waveforms. |
| SINAD | 70 dB min at 300 kHz input - ensures ≥8.6 ENOB for accurate spectral analysis in instrumentation applications. |
| Input Bandwidth | 20 MHz (–3 dB) - accommodates wideband transducer signals without external anti-alias filtering. |
| Power Dissipation | 9 mW max at 1 MSPS / 5 V; 3.75 mW max at 833 kSPS / 3 V - enables thermally constrained portable designs. |
| Reference Range | 100 mV to 3.5 V (5 V supply); 100 mV to 2.2 V (3 V supply) - allows scalable input range tuning for varying sensor sensitivities. |
| INL | ±1 LSB max (B version) - guarantees monotonicity and <0.025% full-scale linearity error across temperature. |
Pinout & Package
AD7450BRM-REEL is housed in an 8-lead SOIC package (SOIC-8, body width 3.9 mm, JEDEC MS-012). Pin spacing is 1.27 mm; package is RoHS-compliant and rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF | External reference input | Defines full-scale differential input span (2×VREF); must be decoupled with ≥0.1 µF capacitor to GND. |
| VIN+ | Differential analog input (+) | Accepts one phase of fully differential signal; input impedance dominated by 20 pF track capacitance. |
| VIN– | Differential analog input (–) | Accepts inverted phase; matched impedance to VIN+ ensures common-mode rejection >70 dB up to 100 kHz. |
| 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 transfer; minimum pulse width = 10 ns. |
| SDATA | Serial data output | Three-state, MSB-first output delivering 16-bit word (4 zeros + 12-bit result); compatible with SPI/QSPI/MICROWIRE. |
| SCLK | Serial clock input | Drives both data readout and internal conversion timing; supports 4 kHz–18 MHz range per supply condition. |
| 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 | Successive approximation architecture guarantees deterministic, zero-latency conversion - critical for closed-loop motor control timing. |
| Fully differential input | Rejects common-mode noise and doubles dynamic range versus single-ended inputs - improves SNR in noisy industrial environments. |
| Flexible reference scaling | VREF adjustable from 100 mV to 3.5 V enables optimized resolution for low-level sensor outputs (e.g., strain gauges, RTDs). |
| Low-power shutdown mode | 1 µA max quiescent current in full power-down - extends battery life in intermittent-sampling portable instruments. |
| High-speed serial interface | 18 MHz SCLK support at 5 V enables 1 MSPS throughput with minimal microcontroller overhead and bus contention. |
Applications
| Transducer Interface | Battery-Powered Systems |
|---|---|
Use Scenario: High-precision measurement of bridge-based sensors (load cells, pressure transducers) in industrial field devices. IC Role / Device Role / Timing Role: ADC front-end acquiring differential output with 70 dB SINAD and ±1 LSB INL to resolve sub-millivolt changes. Use Value: Enables 16-bit-equivalent effective resolution without external amplification, reducing BOM cost and board area. |
Use Scenario: Data acquisition in handheld multimeters and portable oscilloscopes operating from coin-cell or Li-ion batteries. IC Role / Device Role / Timing Role: Low-power 12-bit converter operating at 833 kSPS on 3 V supply with 3.75 mW dissipation and 1 µA shutdown current. Use Value: Extends runtime between charges while maintaining sufficient bandwidth for audio-frequency signal capture. |
| Data Acquisition Systems | Motor Control |
Use Scenario: Multi-channel synchronized sampling in PLC I/O modules and test equipment requiring stable DC accuracy. IC Role / Device Role / Timing Role: Standalone SAR ADC providing monotonic 12-bit conversion with ±1 LSB DNL and guaranteed no missing codes. Use Value: Eliminates code ambiguities during ramp testing and calibration, improving system-level metrological traceability. |
Use Scenario: Real-time current sensing in three-phase inverter drives using shunt resistors and isolated amplifiers. IC Role / Device Role / Timing Role: High-throughput ADC capturing fast current transients with 20 MHz input bandwidth and 1 MSPS rate. Use Value: Supports field-oriented control (FOC) algorithms requiring <1 µs conversion latency and minimal aperture jitter (50 ps). |
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 |
|---|---|---|---|
| AD7451BRM-REEL | Same SOIC-8 package and pinout; differs in reference input structure (internal buffer vs. direct external VREF) and higher THD (–70 dB vs. –75 dB). | Requires buffered reference source; less suitable for ultra-low-noise transducer interfaces where external reference optimization is critical. | Select AD7451BRM-REEL only if internal reference buffering simplifies layout and THD degradation is acceptable. |
| ADS7822U | 8-pin SOIC, 12-bit, 200 kSPS max; uses internal reference (2.5 V), no differential input - single-ended only. | Limited to lower-speed, single-ended sensor interfaces; lacks differential noise immunity and full-power bandwidth (>20 MHz). | Choose ADS7822U for cost-sensitive, low-bandwidth applications where differential signaling is unnecessary. |
Compared with AD7450BRM-REEL, AD7451BRM-REEL offers integrated reference buffering but sacrifices SINAD and flexibility, while ADS7822U trades speed, differential capability, and reference programmability for lower cost and simpler supply design.
Availability
AD7450BRM-REEL is available at Aetrix Electronics and suitable for transducer interface, battery-powered systems, and motor control applications requiring stable component supply, long-term manufacturability, and guaranteed RoHS compliance.
Supply support for AD7450BRM-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, headquartered in Norwood, MA.
The AD7450 belongs to Analog Devices' precision SAR ADC product line, engineered for high-speed, low-power, differential-input data acquisition in space-constrained and energy-sensitive applications.
FAQ
What is the maximum sampling rate of the AD7450BRM-REEL?
The AD7450BRM-REEL achieves 1 MSPS maximum throughput when operated from a 5 V supply with an 18 MHz SCLK. At 3 V, its maximum rate is 833 kSPS using a 15 MHz SCLK. Conversion time is fixed at 16 SCLK cycles, so actual rate scales linearly with clock frequency within specified limits.
Does the AD7450BRM-REEL require an external voltage reference?
Yes, the AD7450BRM-REEL requires an external reference applied to the VREF pin. It supports VREF from 100 mV to 3.5 V (5 V supply) or 100 mV to 2.2 V (3 V supply). The reference sets the full-scale differential input range (±VREF) and common-mode operating point.
Is the AD7450BRM-REEL pin-compatible with other members of the AD745x family?
Yes, the AD7450BRM-REEL shares identical SOIC-8 pinout and function mapping with AD7451BRM-REEL and AD7452BRM-REEL. However, differences in reference architecture and internal buffering mean firmware and reference circuitry may require validation before substitution.
What is the power consumption of the AD7450BRM-REEL in shutdown mode?
In full power-down mode, the AD7450BRM-REEL draws ≤1 µA at both 3 V and 5 V supplies, regardless of SCLK state. This enables ultra-low-quiescent operation between conversions in battery-powered systems without sacrificing wake-up latency (power-up time ≤1 µs).
Can the AD7450BRM-REEL interface directly with an SPI host controller?
Yes, the AD7450BRM-REEL supports SPI, QSPI, and MICROWIRE protocols. Its SDATA output is three-state, CS initiates conversion and frames data, and SCLK clocks both acquisition and serial readout - enabling seamless integration with standard SPI peripherals without glue logic.
AD7450BRM-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:
- -
AD7450BRM-REEL FAQ
1.How can I place an order for AD7450BRM-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7450BRM-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 AD7450BRM-REEL reliable?
The price and inventory of AD7450BRM-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7450BRM-REEL is usually 5 days.
3.What payment methods are accepted for AD7450BRM-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7450BRM-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7450BRM-REEL?
AD7450BRM-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7450BRM-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 AD7450BRM-REEL?
For technical support, including AD7450BRM-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7450BRM-REEL requirements.
6.How does Aetrix verify that AD7450BRM-REEL is sourced from the original manufacturer or authorized distributors?
All AD7450BRM-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 AD7450BRM-REEL meets industry standards.
7.What is the process for return or replacement of AD7450BRM-REEL?
All AD7450BRM-REEL units undergo pre-shipment inspection (PSI). If there is an issue with AD7450BRM-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 AD7450BRM-REEL part is unused and in its original packaging.
Return procedure for AD7450BRM-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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