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Analog Devices Inc. AD7450ABRM
- Part No.:
- AD7450ABRM
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7450ABRM.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,506
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Product details
Overview
AD7450ABRM 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 INL max, and operation from single 3 V or 5 V supply - used in high-accuracy transducer interface and portable instrumentation systems.
For engineers reviewing the AD7450ABRM datasheet, AD7450ABRM pinout, AD7450ABRM application, or AD7450ABRM equivalent, this page delivers verified specifications, package mapping to 8-lead SOT-23, functional pin roles, real-world use scenarios, and two validated alternative parts for signal chain design and BOM optimization.
Technical Context
The AD7450ABRM implements 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 full-scale bandwidth of 2.5 MHz (–0.1 dB).
It accepts an externally applied reference voltage (VREF) ranging from 100 mV to 3.5 V, directly setting the differential input span (2 × VREF) and common-mode operating point. Serial interface is SPI/QSPI/MICROWIRE/DSP-compatible, with data output as twos-complement 12-bit words preceded by four leading zeros.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete digital codes for high-fidelity signal digitization in precision measurement. |
| Throughput Rate | 1 MSPS - enables real-time capture of fast-changing sensor or motor feedback signals without undersampling. |
| SINAD | 70 dB min at 100 kHz - ensures >8.3 effective bits (ENOB) for accurate spectral representation in noise-sensitive applications. |
| INL | ±1 LSB max - guarantees monotonicity and linearity critical for closed-loop control and calibration-critical systems. |
| Power Dissipation | 4 mW max at 1 MSPS with 3 V supply - supports battery-powered operation with minimal thermal load in compact layouts. |
| Reference Range | VREF = 100 mV to 3.5 V - allows flexible input scaling (e.g., ±125 mV to ±1.75 V differential) without external gain stages. |
| Aperture Jitter | 50 ps typ - limits sampling uncertainty to <0.01% of 1 MSPS period, preserving dynamic performance at high input frequencies. |
Pinout & Package
AD7450ABRM is housed in an 8-lead SOT-23 package (JEDEC MO-178AA), optimized for space-constrained PCBs and compatible with standard reflow profiles. Pin 1 is marked with a dot; device orientation follows JEDEC-standard top-view labeling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF | External reference input | Defines full-scale differential input range (2 × VREF); must be decoupled with ≥0.1 µF capacitor to GND for stable conversion accuracy. |
| VIN+ | Differential analog input (+) | Accepts signal referenced to VCM = VREF; supports rail-to-rail common-mode range when VREF is set appropriately. |
| VIN− | Differential analog input (−) | Complements VIN+ to enable rejection of common-mode noise up to 70 dB at 100 kHz (CMRR). |
| 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 | Initiates conversion on falling edge and frames serial data transfer; enables synchronous multi-device SPI bus sharing. |
| SDATA | Serial data output | Outputs 12-bit twos-complement result MSB-first, prefixed by four leading zeros; three-state controlled by CS. |
| SCLK | Serial clock input | Drives both data readout and internal conversion timing; supports up to 18 MHz for 16-cycle 12-bit transfers. |
| 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 low-noise operation. |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | SAR architecture ensures deterministic 16-clock-cycle conversion time (888 ns @ 18 MHz SCLK), eliminating latency uncertainty in real-time control loops. |
| Fully differential input | Rejects common-mode interference and doubles effective input swing vs. single-ended ADCs, improving SNR in noisy industrial environments. |
| Flexible reference scaling | VREF programmability (100 mV–3.5 V) permits direct interfacing with low-voltage sensors (e.g., MEMS accelerometers) without level-shifting circuitry. |
| Low-power shutdown mode | 1 µA max quiescent current enables rapid power cycling in duty-cycled data acquisition, extending battery life in portable instruments. |
| SPI/QSPI/MICROWIRE compatibility | Native support for industry-standard serial protocols simplifies integration with ARM Cortex-M, DSP, and FPGA host controllers without glue logic. |
Applications
| Transducer Interface | Battery-Powered Systems |
|---|---|
Use Scenario: Digitizing output from strain-gauge bridges or piezoelectric sensors in handheld test equipment. IC Role / Device Role / Timing Role: High-resolution, low-latency ADC capturing microvolt-level differential signals with minimal power draw. Use Value: 70 dB SINAD and ±1 LSB INL ensure calibrated measurement accuracy; 4 mW max power at 1 MSPS extends runtime on coin-cell or Li-ion batteries. |
Use Scenario: Monitoring battery voltage, temperature, and load current in wireless sensor nodes with intermittent wake-up cycles. IC Role / Device Role / Timing Role: Precision analog front-end converting sensor outputs during brief active windows before entering 1 µA shutdown. Use Value: Fast 1 MSPS throughput captures transient events; flexible VREF allows direct connection to low-output thermistors or shunt monitors. |
| Data Acquisition Systems | Motor Control Feedback |
Use Scenario: Multi-channel synchronized sampling in benchtop DAQ units for lab-grade waveform analysis. IC Role / Device Role / Timing Role: Standalone 12-bit SAR ADC providing deterministic conversion timing and low aperture jitter for coherent FFT processing. Use Value: 50 ps aperture jitter and 2.5 MHz full-power bandwidth preserve signal integrity up to 100 kHz input frequency with 70 dB SINAD. |
Use Scenario: Sampling phase currents and DC bus voltage in BLDC motor drives for field-oriented control (FOC). IC Role / Device Role / Timing Role: High-speed differential ADC capturing fast-rising current sense waveforms with common-mode noise rejection near switching nodes. Use Value: Differential input rejects EMI from PWM gate drivers; 1 MSPS rate supports >10 kHz current loop bandwidth with oversampling capability. |
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 |
|---|---|---|---|
| AD7450ARMZ | Same die, identical specs, but in 8-lead MSOP package (3 mm × 3 mm vs. SOT-23's 2.9 mm × 1.6 mm); θJA = 205.9°C/W vs. 211.5°C/W. | Preferred where board area allows larger footprint and thermal performance margin is prioritized over miniaturization. | Select AD7450ARMZ if MSOP layout compatibility or slightly better thermal resistance is required; pinout differs (VREF/VIN+/VIN−/GND order swapped). |
| ADS7822U | 12-bit, 200 kSPS max, single-supply 2.7–5.25 V, but only single-ended input; SINAD = 69 dB at 10 kHz; no differential T/H stage. | Suitable for cost-sensitive, lower-speed applications where differential noise rejection is not mandatory. | Choose ADS7822U only when throughput ≤200 kSPS suffices and common-mode noise immunity is not required - not a drop-in replacement. |
Compared with AD7450ABRM, AD7450ARMZ offers identical electrical performance in a thermally superior but physically larger package, while ADS7822U trades differential input and 5× speed for lower cost and simpler analog front-end design - neither is pin-compatible, requiring layout revision.
Availability
AD7450ABRM is available at Aetrix Electronics and suitable for transducer interface, battery-powered instrumentation, and motor control applications requiring stable component supply, long-term manufacturability, and guaranteed traceable sourcing.
Supply support for AD7450ABRM 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 AD7450A product line delivers precision, low-power SAR ADCs optimized for space-constrained, battery-operated, and noise-sensitive measurement systems - emphasizing differential input fidelity, flexible reference scaling, and deterministic timing.
FAQ
What is the maximum sampling rate supported by the AD7450ABRM?
The AD7450ABRM 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 industrial temperature range (–40°C to +85°C) and both 3 V and 5 V supply conditions, with no pipeline delay affecting timing predictability in the AD7450ABRM.
Does the AD7450ABRM require an external reference voltage?
Yes, the AD7450ABRM requires an external reference voltage applied to the VREF pin to define its full-scale differential input range (2 × VREF). The reference can range from 100 mV to 3.5 V depending on supply voltage, and must be decoupled with at least a 0.1 µF capacitor to GND - no internal reference is provided in the AD7450ABRM.
Is the AD7450ABRM compatible with SPI interface standards?
Yes, the AD7450ABRM features a native SPI-compatible serial interface that also supports QSPI, MICROWIRE, and DSP protocols. It uses CS as frame sync, SCLK for clocking, and SDATA for MSB-first 12-bit twos-complement output with four leading zeros - fully interoperable with standard SPI controllers without protocol translation in the AD7450ABRM.
What package type is used for the AD7450ABRM?
The AD7450ABRM is packaged in an 8-lead SOT-23 (JEDEC MO-178AA) with a 1.6 mm body width and 0.95 mm pitch. This ultra-compact package supports high-density PCB layouts and standard reflow soldering processes, distinguishing it from the MSOP variant (AD7450ARMZ) in the same family - the AD7450ABRM specifically uses SOT-23.
How does the differential input architecture benefit system design with the AD7450ABRM?
The fully differential input of the AD7450ABRM provides inherent common-mode noise rejection (70 dB CMRR at 100 kHz), doubles effective input voltage swing, and eliminates the need for external instrumentation amplifiers in many sensor interfaces. This reduces component count, board area, and signal-chain error sources - a core advantage engineered into the AD7450ABRM for precision measurement.
AD7450ABRM 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:
- Obsolete
- 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:
- -
AD7450ABRM FAQ
1.How can I place an order for AD7450ABRM through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7450ABRM 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 AD7450ABRM reliable?
The price and inventory of AD7450ABRM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7450ABRM is usually 5 days.
3.What payment methods are accepted for AD7450ABRM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7450ABRM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7450ABRM?
AD7450ABRM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7450ABRM 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 AD7450ABRM?
For technical support, including AD7450ABRM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7450ABRM requirements.
6.How does Aetrix verify that AD7450ABRM is sourced from the original manufacturer or authorized distributors?
All AD7450ABRM 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 AD7450ABRM meets industry standards.
7.What is the process for return or replacement of AD7450ABRM?
All AD7450ABRM units undergo pre-shipment inspection (PSI). If there is an issue with AD7450ABRM, 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 AD7450ABRM part is unused and in its original packaging.
Return procedure for AD7450ABRM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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