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Analog Devices Inc. AD7450ARMZ
- Part No.:
- AD7450ARMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7450ARMZ.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,049
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Product details
Overview
AD7450ARMZ 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/MICROWIRE-compatible serial interface. It features no pipeline delay, 70 dB SINAD at 300 kHz, and 1 µA max power-down current - used in high-accuracy transducer interfaces and battery-powered data acquisition systems.
For engineers reviewing the AD7450ARMZ datasheet, AD7450ARMZ pinout, AD7450ARMZ application, or AD7450ARMZ equivalent, this page delivers verified specifications, SOIC-8 package mapping, real-world use scenarios for motor control and portable instrumentation, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The AD7450ARMZ employs 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 - eliminating pipeline latency and enabling precise sampling control.
All timing, power, and dynamic performance are supply-voltage dependent: at 5 V, it achieves 1 MSPS with 9 mW max dissipation and 70 dB SINAD; at 3 V, throughput drops to 833 kSPS with 3.75 mW max and 68 dB SINAD. Reference voltage (100 mV–3.5 V) directly sets full-scale span (2×VREF) and common-mode range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity signal digitization |
| Max Throughput Rate | 1 MSPS at 5 V / 833 kSPS at 3 V - enables real-time sampling of fast transients in motor control loops |
| SINAD | 70 dB min at 300 kHz input (5 V supply) - supports >8-bit effective resolution in communications band |
| INL | ±2 LSB max (A version) - ensures monotonicity and linearity-critical calibration accuracy |
| Power-Down Current | 1 µA max - extends battery life in portable instrumentation between measurement bursts |
| Reference Range | 100 mV to 3.5 V (5 V supply); 100 mV to 2.2 V (3 V supply) - allows flexible input scaling and biasing |
| Aperture Jitter | 50 ps typ - limits SNR degradation at high input frequencies (e.g., >100 kHz sine waves) |
Pinout & Package
AD7450ARMZ is housed in an 8-lead SOIC package (SOIC-8, body width 3.9 mm), RoHS-compliant, with standard JEDEC MS-012AC footprint and 1.27 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF | External reference input | Defines full-scale span (2×VREF) and common-mode operating point; requires ≥0.1 µF decoupling |
| VIN+ | Differential analog input (+) | Accepts signal referenced to VIN–; input capacitance = 20 pF (track), 6 pF (hold) |
| VIN– | Differential analog input (–) | Completes differential pair; matched impedance critical to avoid settling error |
| GND | Analog ground reference | Single-point return for all analog circuitry including VREF and inputs; must be isolated from digital ground |
| CS | Active-low chip select | Initiates conversion on falling edge and frames serial data transfer; minimum pulse width = 10 ns |
| SDATA | Serial data output | 16-bit frame: 4 leading zeros + 12-bit two's complement result, MSB-first, clocked on SCLK falling edge |
| SCLK | Serial clock input | Drives both data transfer and internal conversion timing; max 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 |
Key Features
| Feature | Design Value |
|---|---|
| No pipeline delay | SAR architecture guarantees deterministic, zero-latency conversion - essential for closed-loop feedback timing |
| Fully differential input | Rejects common-mode noise up to 90 dB (at 10 kHz) and doubles dynamic range vs. single-ended inputs |
| Flexible reference scaling | VREF adjustable from 100 mV to 3.5 V enables tailored input ranges (e.g., ±125 mV to ±3.5 V differential) |
| Low-power serial interface | SCLK-governed throughput allows dynamic power scaling: 0.53 mW typ at 100 kSPS (3 V) |
| High-speed T/H amplifier | 20 MHz –3 dB bandwidth supports accurate sampling of >1 MHz input signals without aliasing |
Applications
| Transducer Interface | Battery-Powered Systems |
|---|---|
Use Scenario: High-precision strain gauge or RTD bridge readout in industrial sensor nodes. IC Role / Device Role / Timing Role: ADC digitizes low-level differential bridge outputs with 12-bit resolution and 70 dB SINAD at 300 kHz. Use Value: Differential input rejects EMI from nearby motors; variable VREF allows optimal gain matching to front-end instrumentation amplifier. |
Use Scenario: Portable multimeter or handheld oscilloscope capturing transient waveforms on rechargeable Li-ion power. IC Role / Device Role / Timing Role: Low-power ADC performs burst sampling at 833 kSPS (3 V), then enters 1 µA shutdown mode between captures. Use Value: 3.75 mW max active power and sub-µA standby extend runtime; SOIC-8 simplifies compact PCB layout. |
| Data Acquisition Systems | Motor Control |
Use Scenario: 16-channel isolated DAQ module for factory-floor vibration monitoring. IC Role / Device Role / Timing Role: ADC interfaces via SPI to FPGA controller; CS-driven sampling synchronizes with isolation gate drivers. Use Value: No pipeline delay ensures deterministic sample-to-data-read latency; 50 ps aperture jitter preserves phase coherence across channels. |
Use Scenario: Real-time current sensing in three-phase inverter drives using shunt resistors. IC Role / Device Role / Timing Role: Digitizes differential shunt voltage with 12-bit resolution and <1.07 µs conversion time (18 MHz SCLK). Use Value: Fast throughput supports >10 kHz PWM switching frequency sampling; differential input rejects high dv/dt noise from IGBT switching. |
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 |
|---|---|---|---|
| AD7451ARMZ | Same SOIC-8 package and pinout; adds internal reference (2.5 V) and unbuffered inputs; 1 MSPS at 5 V only | Eliminates external reference design but sacrifices VREF flexibility and 3 V operation | Select when board space is constrained and fixed 2.5 V reference suffices; not suitable for 3 V battery systems |
| ADS7822U | 12-bit, 200 kSPS max, 3 V only, SPI interface, no differential input - uses pseudo-differential IN+ / IN– with shared COM | Limited to lower-speed, single-ended or pseudo-differential applications; lacks true CMRR and wide bandwidth | Choose for cost-sensitive, low-throughput designs where differential rejection and >200 kSPS are unnecessary |
Compared with AD7450ARMZ, AD7451ARMZ offers integrated reference convenience at the expense of supply voltage flexibility and reference programmability, while ADS7822U trades off speed, true differential capability, and dynamic performance for lower cost and simpler biasing in non-demanding applications.
Availability
AD7450ARMZ is available at Aetrix Electronics and suitable for transducer interface, battery-powered instrumentation, and motor control applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AD7450ARMZ 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 Wilmington, MA.
The AD7450ARMZ belongs to Analog Devices' precision SAR ADC product line, designed for high-speed, low-power, differential-input data acquisition in industrial, medical, and portable test equipment.
FAQ
What is the maximum input frequency the AD7450ARMZ can accurately digitize?
The AD7450ARMZ has a full-power bandwidth of 20 MHz (–3 dB) and maintains 70 dB SINAD up to 300 kHz input frequency at 1 MSPS. Its 20 MHz T/H bandwidth supports faithful sampling of signals beyond 1 MHz, but system-level anti-aliasing filtering is required for inputs near Nyquist to prevent distortion.
Does the AD7450ARMZ require an external reference, and what voltage range is supported?
Yes, the AD7450ARMZ requires an external reference applied to the VREF pin. With a 5 V supply, VREF may range from 100 mV to 3.5 V; with a 3 V supply, it supports 100 mV to 2.2 V. The reference directly defines full-scale differential input span (2×VREF) and common-mode operating point.
Can the AD7450ARMZ operate from a 3.3 V supply?
Yes - the AD7450ARMZ is specified for 3 V ±10%, covering 2.7 V to 3.3 V. At 3.3 V, it achieves 833 kSPS maximum throughput, 68 dB SINAD at 300 kHz, and 3.75 mW max power dissipation. Performance remains within datasheet limits across this range.
What is the purpose of the four leading zeros in the AD7450ARMZ serial output format?
The AD7450ARMZ outputs a 16-bit serial word comprising four leading zeros followed by the 12-bit two's complement result, MSB first. This fixed-length framing simplifies FPGA or microcontroller bit-shift logic and ensures consistent byte alignment regardless of data value, easing firmware parsing.
How does the AD7450ARMZ handle common-mode voltage on its differential inputs?
The AD7450ARMZ accepts a user-defined common-mode voltage (VCM = (VIN+ + VIN–)/2) that must lie within a VREF-dependent range - e.g., 1.25 V to 3.75 V when VREF = 2.5 V and VDD = 5 V. VCM sets the DC bias point; the differential signal (VIN+ – VIN–) swings ±VREF around it, enabling flexible input coupling schemes.
AD7450ARMZ 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:
- -
AD7450ARMZ FAQ
1.How can I place an order for AD7450ARMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7450ARMZ 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 AD7450ARMZ reliable?
The price and inventory of AD7450ARMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7450ARMZ is usually 5 days.
3.What payment methods are accepted for AD7450ARMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7450ARMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7450ARMZ?
AD7450ARMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7450ARMZ 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 AD7450ARMZ?
For technical support, including AD7450ARMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7450ARMZ requirements.
6.How does Aetrix verify that AD7450ARMZ is sourced from the original manufacturer or authorized distributors?
All AD7450ARMZ 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 AD7450ARMZ meets industry standards.
7.What is the process for return or replacement of AD7450ARMZ?
All AD7450ARMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7450ARMZ, 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 AD7450ARMZ part is unused and in its original packaging.
Return procedure for AD7450ARMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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