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Analog Devices Inc. AD7450ABRMZ
- Part No.:
- AD7450ABRMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7450ABRMZ.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:169
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Product details
Overview
AD7450ABRMZ from Analog Devices is a 12-bit, 1 MSPS successive approximation register (SAR) analog-to-digital converter with fully differential analog inputs, 70 dB minimum SINAD at 100 kHz, ±1 LSB max INL, and operation from single 3 V or 5 V supply. It targets high-accuracy data acquisition in space-constrained battery-powered instrumentation.
For engineers reviewing the AD7450ABRMZ datasheet, AD7450ABRMZ pinout, AD7450ABRMZ application, or AD7450ABRMZ equivalent, this page delivers verified specifications, package mapping to 8-lead SOT-23, functional pin roles, real-world use cases, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The AD7450ABRMZ uses a SAR architecture with no pipeline delay, enabling deterministic conversion timing and precise sampling control via CS falling edge. Its low-noise, wide-bandwidth differential track-and-hold amplifier supports input frequencies up to 3.5 MHz and delivers 70 dB SINAD at 100 kHz with 5 V supply.
Conversion is synchronized to an external serial clock (SCLK), with throughput rate directly scalable by clock frequency. The device accepts externally applied reference voltage (VREF) from 100 mV to 3.5 V, enabling flexible full-scale input spans of ±VREF and common-mode biasing across diverse sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity signal digitization in precision measurement systems. |
| Throughput Rate | 1 MSPS - enables real-time capture of fast transients in motor control feedback loops and dynamic sensor signals. |
| SINAD | 70 dB min at 100 kHz - ensures ≥11.3 effective bits of resolution for clean spectral performance in noisy industrial environments. |
| INL | ±1 LSB max - guarantees monotonicity and linearity critical for closed-loop control accuracy and calibration traceability. |
| Power Dissipation | 4 mW max at 1 MSPS with 3 V supply - supports extended runtime in portable medical devices and handheld test equipment. |
| Reference Input Range | 100 mV to 3.5 V - allows user-defined full-scale span (±VREF) and common-mode voltage selection for direct interfacing with op-amp sensor front-ends. |
| Package | 8-lead SOT-23 - provides 2.9 mm × 1.6 mm footprint ideal for compact PCB layouts in space-limited embedded modules. |
Pinout & Package
AD7450ABRMZ is housed in an 8-lead SOT-23 package (JEDEC MO-178AA), with gull-wing leads, 0.95 mm pitch, and thermal resistance θJA = 211.5°C/W. Pin 1 is marked by a dot; top view orientation matches Figure 5 in Rev. D datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF | External reference voltage input | Accepts 100 mV–3.5 V reference; sets full-scale differential input range (±VREF) and common-mode bias point for VIN+ and VIN−. |
| VIN+ | Differential analog input positive terminal | Receives one leg of fully differential signal; requires matched layout and termination to VIN− for optimal CMRR and distortion performance. |
| VIN− | Differential analog input negative terminal | Receives inverted leg of differential signal; common-mode voltage must be centered at VREF for specified DC accuracy. |
| GND | Analog ground reference | Single-point return for all analog circuitry; must be isolated from digital ground to prevent noise coupling into ADC core. |
| CS | Active-low chip select / conversion trigger | Falling edge initiates conversion and frames serial data transfer; enables precise sampling synchronization with external controllers. |
| SDATA | Serial data output | Outputs 12-bit twos-complement result MSB-first as 4 leading zeros + 12 data bits; three-state capable for bus sharing. |
| SCLK | Serial clock input | Drives both data transfer and internal conversion timing; maximum 18 MHz rate supports 1 MSPS throughput with 16-cycle cycle time. |
| VDD | Power supply input | Accepts 2.7–3.6 V or 4.75–5.25 V; requires parallel 0.1 µF ceramic + 10 µF tantalum decoupling for stable reference and analog performance. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | SAR architecture ensures deterministic 16-clock-cycle conversion time (888 ns @ 18 MHz), eliminating latency uncertainty in real-time control loops. |
| Flexible reference scaling | VREF input range (100 mV–3.5 V) permits tailored full-scale spans and common-mode biasing-enabling direct interface with low-voltage sensor outputs or high-gain amplifiers. |
| Low-power shutdown mode | 1 µA max quiescent current in full power-down state extends battery life in intermittent-sampling applications like wireless sensor nodes. |
| SPI/QSPI/MICROWIRE/DSP compatibility | Standard serial interface eliminates need for custom logic or protocol translation, simplifying integration with ARM Cortex-M, C2000, or SHARC processors. |
| Differential input with 70 dB SINAD | Wide-bandwidth T/H amplifier and matched input structure reject common-mode noise and preserve signal integrity for transducer and motor current sensing. |
Applications
| Transducer Interface | Battery-Powered Instrumentation |
|---|---|
Use Scenario: Digitizing low-level bridge sensor outputs (e.g., strain gauges, pressure sensors) in handheld calibrators. IC Role / Device Role / Timing Role: ADC front-end with differential input rejecting EMI and supply ripple; CS-triggered sampling synchronized to excitation pulses. Use Value: 70 dB SINAD and ±1 LSB INL ensure <1% measurement error over temperature; 4 mW power enables >10-hour runtime on coin-cell batteries. |
Use Scenario: Capturing biopotential signals (ECG, EMG) in wearable health monitors with ultra-low standby current. IC Role / Device Role / Timing Role: High-resolution analog front-end with programmable VREF scaling to match electrode offset and gain stages. Use Value: 1 µA shutdown current minimizes system leakage; 12-bit resolution captures microvolt-level waveform details without oversampling. |
| Data Acquisition Systems | Motor Control Feedback |
Use Scenario: Multi-channel voltage/current monitoring in industrial PLC I/O modules with tight board area constraints. IC Role / Device Role / Timing Role: Compact SAR ADC providing deterministic 1 MSPS sampling per channel; SPI interface enables daisy-chained readout. Use Value: 8-lead SOT-23 footprint reduces PCB area by >40% vs. MSOP alternatives; no pipeline delay ensures accurate phase alignment across channels. |
Use Scenario: Sampling phase currents in three-phase inverter drives for field-oriented control (FOC) algorithms. IC Role / Device Role / Timing Role: Differential ADC capturing fast-switching current sense signals with minimal aperture jitter (50 ps typ). Use Value: 5 ns aperture delay and 50 ps jitter enable sub-degree current vector angle accuracy; 2.5 MHz full-power bandwidth supports >20 kHz PWM frequencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7450ARMZ | Same 12-bit/1 MSPS specs and pinout, but in 8-lead MSOP package (3 mm × 3 mm); θJA = 205.9°C/W vs. 211.5°C/W for SOT-23. | Preferred where thermal margin is critical or board layout allows larger footprint; not suitable for ultra-dense SOT-23-only designs. | Select AD7450ARMZ when thermal performance outweighs size constraints; AD7450ABRMZ remains optimal for miniaturized portable systems. |
| ADS7822U | 12-bit, 200 kSPS max, SPI interface, 6-lead SOT-23; lower speed, no differential input, fixed internal reference. | Targeted at cost-sensitive, low-throughput applications like basic sensor logging-not suitable for 1 MSPS or differential signal chains. | Choose ADS7822U only for non-critical, low-bandwidth measurements where differential rejection and speed are unnecessary. |
Compared with AD7450ARMZ, AD7450ABRMZ trades 5.6°C/W higher thermal resistance for 42% smaller footprint-critical in handheld instruments. Versus ADS7822U, AD7450ABRMZ delivers 5× higher throughput, true differential input, and external VREF flexibility essential for precision transducer interfaces.
Availability
AD7450ABRMZ is available at Aetrix Electronics and suitable for transducer interface, battery-powered instrumentation, and motor control feedback applications requiring stable component supply, long-term lifecycle support, and guaranteed authentic sourcing.
Supply support for AD7450ABRMZ 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 technologies, serving industrial, automotive, communications, and healthcare markets since 1965.
The AD7450A belongs to Analog Devices' precision SAR ADC product line, designed specifically for high-speed, low-power, differential-input data acquisition in space-constrained and battery-operated systems.
FAQ
What is the maximum sampling rate supported by the AD7450ABRMZ?
The AD7450ABRMZ supports a maximum throughput rate of 1 MSPS, achieved with an 18 MHz serial clock and 16 SCLK cycles per conversion. This rate is guaranteed across the full operating temperature range (–40°C to +85°C) and both 3 V and 5 V supply conditions, making AD7450ABRMZ suitable for real-time signal capture in dynamic systems such as motor current monitoring and ultrasonic sensing.
Does the AD7450ABRMZ require an external reference voltage?
Yes, the AD7450ABRMZ requires an external reference voltage applied to the VREF pin. It accepts VREF from 100 mV to 3.5 V, and the selected value directly determines the full-scale differential input range (±VREF) and common-mode voltage. For specified performance, VREF must be 2.06 V ±1% with 3 V supply or 2.55 V ±1% with 5 V supply-so proper reference IC selection and decoupling are essential for AD7450ABRMZ accuracy.
What package type is used for the AD7450ABRMZ?
The AD7450ABRMZ uses an 8-lead SOT-23 package (JEDEC MO-178AA), measuring 2.9 mm × 1.6 mm with 0.95 mm lead pitch. This compact gull-wing package provides the smallest footprint among AD7450A variants and is optimized for high-density PCB layouts in portable and battery-powered equipment where board space is at a premium.
How does the AD7450ABRMZ handle differential analog inputs?
The AD7450ABRMZ features a fully differential analog input structure with dedicated VIN+ and VIN− pins. Its internal track-and-hold amplifier supports input frequencies up to 3.5 MHz and delivers 70 dB SINAD at 100 kHz. Common-mode voltage must be set to VREF, and absolute input voltages must remain within VCM ± VREF/2 to maintain specified linearity and distortion performance-making matched PCB routing and proper front-end biasing critical for AD7450ABRMZ operation.
What is the power consumption of the AD7450ABRMZ in active and shutdown modes?
In normal operational mode at 1 MSPS, AD7450ABRMZ consumes 4 mW max with a 3 V supply and 9.25 mW max with a 5 V supply. In full power-down mode, it draws just 1 µA max-equating to 3 µW max at 3 V or 5 µW max at 5 V. This ultra-low shutdown current makes AD7450ABRMZ ideal for duty-cycled applications like wireless sensor nodes, where extended battery life depends on aggressive power gating between acquisitions.
AD7450ABRMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 1M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI, DSP
- 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:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7450ABRMZ FAQ
1.How can I place an order for AD7450ABRMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7450ABRMZ 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 AD7450ABRMZ reliable?
The price and inventory of AD7450ABRMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7450ABRMZ is usually 5 days.
3.What payment methods are accepted for AD7450ABRMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7450ABRMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7450ABRMZ?
AD7450ABRMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7450ABRMZ 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 AD7450ABRMZ?
For technical support, including AD7450ABRMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7450ABRMZ requirements.
6.How does Aetrix verify that AD7450ABRMZ is sourced from the original manufacturer or authorized distributors?
All AD7450ABRMZ 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 AD7450ABRMZ meets industry standards.
7.What is the process for return or replacement of AD7450ABRMZ?
All AD7450ABRMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7450ABRMZ, 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 AD7450ABRMZ part is unused and in its original packaging.
Return procedure for AD7450ABRMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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