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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Analog Devices Inc. ADFS7124-4BBCPZ

Name: ADFS7124-4BBCPZ
Brand: Analog Devices Inc.
SKU: ADFS7124-4BBCPZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADFS7124-4BBCPZ

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

Package:: 32-VFQFN Exposed Pad, CSP

Datasheet:: ADFS7124-4BBCPZ.pdf

Description:: 4CH 24B ADC

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Product details

Overview

ADFS7124-4 from Analog Devices is a 24-bit sigma-delta ADC with integrated PGA, reference, excitation currents, and diagnostics-designed for high-precision industrial sensor measurement. It delivers 24 nV rms noise at 1.17 SPS (low power mode), supports 4 differential or 7 pseudo-differential inputs, and operates across −40°C to +125°C in a 32-lead LFCSP package.

For engineers reviewing the ADFS7124-4 datasheet, ADFS7124-4 pinout, ADFS7124-4 application, or ADFS7124-4 equivalent, this page provides verified technical context, real-world timing rejection specs (80+ dB simultaneous 50/60 Hz rejection), per-channel configuration capability, functional safety certification (TÜV SC3), and calibrated offset/gain error performance across all three power modes.

Technical Context

The ADFS7124-4 integrates a fully configurable analog front end: a 24-bit Σ-Δ modulator with sinc3/sinc4/fast-settling/post filters, programmable gain amplifier (1–128), internal 2.5 V ±0.2% bandgap reference (15 ppm/°C drift), matched excitation current sources (0.1–1000 µA), and on-chip bias voltage generator. Its automatic channel sequencer supports up to 16 diagnostic and analog channels with interleaved conversion.

It implements comprehensive diagnostics including CRC-protected memory maps, signal chain checks, reference detect, overvoltage/undervoltage monitoring, SPI read/write error detection, and burnout current support-all contributing to >90% safe failure fraction (SFF) per IEC 61508. Power management includes three distinct modes (low/mid/full) with corresponding current draw (255/355/930 µA typ), output data rate ranges (1.17–19.2 kSPS), and RMS noise profiles.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	24-bit no missing codes; 22 noise-free bits at gain = 1 in all power modes
RMS Noise (gain = 128)	24 nV (low power), 20 nV (mid power), 23 nV (full power) - defines minimum detectable signal swing
Output Data Rate Range	1.17–2400 SPS (low), 2.34–4800 SPS (mid), 9.38–19,200 SPS (full) - enables trade-off between speed and resolution
50/60 Hz Rejection	≥120 dB at 10 SPS (sinc4 filter); simultaneous rejection at 25 SPS with single-cycle settling - eliminates mains interference without external notch filters
INL Error	±1 ppm of FSR (gain = 12), ±2 ppm (gain > 14) - ensures linearity critical for calibration-grade instrumentation
Power Supply Range	AVDD/AVSS = 2.7–3.6 V (low/mid), 2.9–3.6 V (full); IOVDD = 1.65–3.6 V - supports mixed-voltage system integration
Operating Temperature	−40°C to +125°C - qualified for harsh industrial and automotive under-hood environments

Pinout & Package

ADFS7124-4 is housed in a 32-lead, 5 mm × 5 mm, 0.8 mm profile LFCSP (Lead Frame Chip Scale Package) with exposed paddle for thermal dissipation. Pin 1 marked via top-side dot; recommended solder profile per JEDEC J-STD-020.

Pin/Terminal	Circuit Role	Design Meaning
AIN0P/AIN0N to AIN3P/AIN3N	Differential analog input pairs	Support 4 fully differential channels; rail-to-rail operation for gains > 1 enables direct connection to bridge sensors
REGCAPD	Digital LDO regulator output	Requires 0.1 µF decoupling to DGND; stabilizes internal digital supply independent of IOVDD
IOVDD	Digital interface supply	Independent 1.65–3.6 V rail allows level-shifting with host MCU; decoupled separately from AVDD
DOUT/RDY	Serial data output / ready indicator	3-wire or 4-wire SPI-compatible; RDY asserts when conversion result is available; Schmitt-triggered SCLK input
SYNC	System synchronization input	Enables deterministic timing alignment across multiple ADFS7124-4 devices in multi-channel systems
P1, P2	General-purpose logic outputs	Configurable as GPIO or status indicators; drive capability: VOH = IOVDD − 0.35 V, VOL = 0.4 V @ 100 µA

Key Features

Feature	Design Value
Functional Safety Certification	TÜV Rheinland SC3 certified (File 968/FSP 2188.01/23); FMEDA shows >90% SFF per IEC 61508 - reduces SIL2/3 system validation burden
Per-Channel Configuration	8 independent setups (gain, filter, ODR, reference, buffering) assignable per channel - eliminates firmware reconfiguration overhead during multiplexed acquisition
Integrated Excitation Currents	Matched 0.1–1000 µA sources (±4% initial tolerance, ±0.5% matching) on any AIN pin - enables ratiometric RTD/bridge measurements without external DACs
Low-Side Power Switch	RON = 7–10 Ω, 30 mA continuous rating - powers down bridge sensors between conversions to minimize system-level power consumption
Self & System Calibration	Zero-scale and full-scale calibration supported; span/offset limits defined (±1.05 FS, 0.8–2.1× FS input span) - maintains accuracy across temperature and aging

Applications

Temperature Measurement	Pressure Measurement
Use Scenario: High-accuracy RTD or thermocouple readout in process control transmitters with ambient temperature ranging from −40°C to +85°C. IC Role / Device Role / Timing Role: Primary ADC with integrated excitation currents, bias voltage generator, and cold-junction compensation via on-chip temperature sensor. Use Value: Eliminates external reference, PGA, excitation DAC, and cold-junction sensor - reduces BOM count by ≥5 components while maintaining <±0.1°C system accuracy.	Use Scenario: 4–20 mA smart pressure transmitter using Wheatstone bridge sensor with 10 mV/V sensitivity and 0.05% FS linearity requirement. IC Role / Device Role / Timing Role: Precision analog front end performing ratiometric conversion, bridge power-down sequencing, and 50/60 Hz noise rejection at 25 SPS. Use Value: Achieves >100 dB normal-mode rejection and 80+ dB simultaneous 50/60 Hz rejection at 25 SPS - meets IEC 61000-4-6 immunity without external filtering.
Industrial Process Control	Smart Transmitters
Use Scenario: Multi-sensor PLC analog input module acquiring flow, level, and pH signals with channel isolation and diagnostic coverage. IC Role / Device Role / Timing Role: Configurable 4-channel ADC with automatic channel sequencer, per-channel filter selection, and integrated diagnostics (CRC, reference detect, supply monitor). Use Value: Enables interleaved diagnostics (e.g., reference check every 4th conversion) without interrupting measurement - satisfies SIL2 diagnostic coverage requirements per IEC 61508.	Use Scenario: HART-enabled field transmitter requiring low standby power (<100 µA), functional safety compliance, and long-term stability over 15-year service life. IC Role / Device Role / Timing Role: Core measurement IC operating in low-power mode (255 µA typ), supporting HART FSK coupling via digital outputs and internal clock oscillator. Use Value: 5 µA max power-down current and TÜV SC3 certification enable Class I Div 2 and ATEX zone 2 deployment with zero external safety components.

Temperature Measurement

Pressure Measurement

Use Scenario: High-accuracy RTD or thermocouple readout in process control transmitters with ambient temperature ranging from −40°C to +85°C.

IC Role / Device Role / Timing Role: Primary ADC with integrated excitation currents, bias voltage generator, and cold-junction compensation via on-chip temperature sensor.

Use Value: Eliminates external reference, PGA, excitation DAC, and cold-junction sensor - reduces BOM count by ≥5 components while maintaining <±0.1°C system accuracy.

Use Scenario: 4–20 mA smart pressure transmitter using Wheatstone bridge sensor with 10 mV/V sensitivity and 0.05% FS linearity requirement.

IC Role / Device Role / Timing Role: Precision analog front end performing ratiometric conversion, bridge power-down sequencing, and 50/60 Hz noise rejection at 25 SPS.

Use Value: Achieves >100 dB normal-mode rejection and 80+ dB simultaneous 50/60 Hz rejection at 25 SPS - meets IEC 61000-4-6 immunity without external filtering.

Industrial Process Control

Smart Transmitters

Use Scenario: Multi-sensor PLC analog input module acquiring flow, level, and pH signals with channel isolation and diagnostic coverage.

IC Role / Device Role / Timing Role: Configurable 4-channel ADC with automatic channel sequencer, per-channel filter selection, and integrated diagnostics (CRC, reference detect, supply monitor).

Use Value: Enables interleaved diagnostics (e.g., reference check every 4th conversion) without interrupting measurement - satisfies SIL2 diagnostic coverage requirements per IEC 61508.

Use Scenario: HART-enabled field transmitter requiring low standby power (<100 µA), functional safety compliance, and long-term stability over 15-year service life.

IC Role / Device Role / Timing Role: Core measurement IC operating in low-power mode (255 µA typ), supporting HART FSK coupling via digital outputs and internal clock oscillator.

Use Value: 5 µA max power-down current and TÜV SC3 certification enable Class I Div 2 and ATEX zone 2 deployment with zero external safety components.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision sigma-delta ADC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD7177-2	24-bit, single-channel, lower noise (100 nV p-p at 10 SPS), no integrated excitation or bias generator, no SC3 certification	Lacks per-channel configuration, excitation currents, and functional safety features - suitable for lab-grade bench instruments, not safety-critical transmitters	Select AD7177-2 only when single-channel performance and ultra-low noise outweigh need for integrated sensor interfaces and safety certification.
ADS1263	24-bit, 10-channel, integrated PGA and reference, but no excitation currents, no TÜV SC3, lower CMRR (105 dB vs. 120 dB), wider temp range (−50°C to +125°C)	Missing burnout detection, reference detect, and signal chain CRC - requires external diagnostics for SIL2 compliance	Choose ADS1263 for cost-sensitive, non-safety applications requiring higher channel count and extended low-temp operation, but accept added design complexity for diagnostics.

Compared with AD7177-2 and ADS1263, the ADFS7124-4 uniquely combines functional safety certification, integrated excitation/bias/switch resources, and per-channel configurability - making it the only option that reduces both component count and safety validation effort in certified industrial transmitters.

Availability

ADFS7124-4 is available at Aetrix Electronics and suitable for industrial process control, smart transmitter design, and high-reliability instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADFS7124-4 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 ADFS7124-4 belongs to Analog Devices' functional safety-certified precision ADC product line, engineered specifically for SIL2/3-capable smart sensors and transmitters where integrated diagnostics, low power, and measurement integrity are mandatory.

FAQ

What power modes does the ADFS7124-4 support, and how do they affect noise and current draw?

The ADFS7124-4 supports three power modes: low (255 µA typ, 24 nV rms noise at 1.17 SPS), mid (355 µA typ, 20 nV rms at 2.34 SPS), and full (930 µA typ, 23 nV rms at 9.4 SPS). Each mode scales output data rate range and current consumption proportionally while preserving 24-bit no-missing-codes performance. The ADFS7124-4 automatically adjusts filter configuration and internal biasing to maintain specified INL and offset drift across all modes.

Does the ADFS7124-4 support simultaneous 50 Hz and 60 Hz rejection, and at what data rates?

Yes, the ADFS7124-4 achieves simultaneous 50 Hz and 60 Hz rejection exceeding 80 dB at 25 SPS with single-cycle settling, and ≥120 dB rejection at 10 SPS using sinc4 filtering. This capability is enabled by REJ60 bit configuration in filter registers and applies to both internal and external clock operation. The ADFS7124-4 maintains this rejection across all three power modes without external components.

How many analog input configurations does the ADFS7124-4 support, and can they be set independently per channel?

The ADFS7124-4 supports eight independent configurations, each defining gain (1–128), filter type (sinc3/sinc4/fast-settling/post), output data rate, buffering state, and reference source. These configurations can be assigned on a per-channel basis - for example, AIN0 may use sinc4 filter at 10 SPS with gain = 64, while AIN1 uses fast-settling mode at 500 SPS with gain = 1. The ADFS7124-4 stores all eight setups in on-chip registers for immediate channel switching.

What diagnostic functions are integrated into the ADFS7124-4, and how do they support functional safety compliance?

The ADFS7124-4 integrates CRC-protected memory map checksums, ROM verification, signal chain checks, reference detect, power supply monitors (ALDO/DLDO), SPI interface error detection, and burnout current diagnostics. These features collectively enable >90% safe failure fraction (SFF) per IEC 61508, validated by TÜV Rheinland SC3 certification (File 968/FSP 2188.01/23). The ADFS7124-4 reports all errors via dedicated ERROR register bits for seamless integration into safety firmware.

Can the ADFS7124-4 operate with an external reference, and what are the voltage and current requirements?

Yes, the ADFS7124-4 accepts buffered or unbuffered external differential references from 0.5 V to AVDD, with absolute limits of AVSS − 0.05 V to AVDD + 0.05 V. Input current is ±0.5 nA (low power mode, buffered) to ±12 µA (unbuffered), with drift ≤10 pA/°C. The ADFS7124-4 also supports internal 2.5 V reference (±0.2% initial accuracy, 15 ppm/°C drift) and allows mixing internal/external references across channels via per-channel configuration.

ADFS7124-4BBCPZ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 32-VFQFN Exposed Pad, CSP

Packaging:: Tray

Product Status:: Active

Number of Bits:: 24

Sampling Rate (Per Second):: 19.2k

Number of Inputs:: 4, 8

Input Type:: Differential, Pseudo-Differential, Single Ended

Data Interface:: 3-Wire Serial, 4-Wire Serial, DSP, MICROWIRE, QSPI, SPI

Configuration:: MUX-PGA-ADC

Ratio - S/H:ADC:: 0:1

Number of A/D Converters:: 1

Architecture:: Sigma-Delta

Reference Type:: External, Internal

Voltage - Supply, Analog:: 2.7V ~ 3.6V, ±1.8V

Voltage - Supply, Digital:: 1.65V ~ 3.6V

Features:: GPIO, Integrated PGA, Multiplexed Input, Temperature Sensor

Operating Temperature:: -40°C ~ 125°C

Supplier Device Package:: 32-LFCSP (5x5)

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

ADFS7124-4BBCPZ FAQ

1.How can I place an order for ADFS7124-4BBCPZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ADFS7124-4BBCPZ 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 ADFS7124-4BBCPZ reliable?

The price and inventory of ADFS7124-4BBCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADFS7124-4BBCPZ is usually 5 days.

3.What payment methods are accepted for ADFS7124-4BBCPZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADFS7124-4BBCPZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADFS7124-4BBCPZ?

ADFS7124-4BBCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADFS7124-4BBCPZ 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 ADFS7124-4BBCPZ?

For technical support, including ADFS7124-4BBCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADFS7124-4BBCPZ requirements.

6.How does Aetrix verify that ADFS7124-4BBCPZ is sourced from the original manufacturer or authorized distributors?

All ADFS7124-4BBCPZ 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 ADFS7124-4BBCPZ meets industry standards.

7.What is the process for return or replacement of ADFS7124-4BBCPZ?

All ADFS7124-4BBCPZ units undergo pre-shipment inspection (PSI). If there is an issue with ADFS7124-4BBCPZ, 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 ADFS7124-4BBCPZ part is unused and in its original packaging.

Return procedure for ADFS7124-4BBCPZ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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