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Home > Products > Integrated Circuits (ICs) > Interface > Sensor and Detector Interfaces

Semtech Corporation SX8725E083TDT

Name: SX8725E083TDT
Brand: Semtech Corporation
SKU: SX8725E083TDT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SX8725E083TDT

Manufacturer:: Semtech Corporation

Category:: Sensor and Detector Interfaces

Package:: 12-WFDFN Exposed Pad

Datasheet:: SX8725E083TDT.pdf

Description:: IC DAS PRESS/TEMP SENS 12MLPD

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Product details

Overview

SX8725E083TDT from Semtech is a low-power, 16-bit ZoomingADC™ analog-to-digital converter optimized for miniature pressure and temperature sensors. It features 1 differential input pair (AC2/AC3), programmable gain up to 1000 V/V, internal 1.22 V bandgap reference, and 2-WIRE (I²C-compatible) interface operating up to 400 kHz. Used in industrial barometers and compass modules where high-resolution sensor digitization with minimal power is critical.

For engineers reviewing the SX8725E083TDT datasheet, pinout, applications, or equivalent options, this device delivers configurable resolution–speed–power trade-offs, sensor biasing via two digital outputs (D0/D1), and on-chip PGA offset compensation-key for precision transducer signal chains in constrained environments.

Technical Context

The SX8725E083TDT implements a switched-capacitor ZoomingADC™ architecture with three cascaded programmable gain amplifiers (PGA1–PGA3), enabling adaptive oversampling (OSR = 8–1024) and resolution scaling from 6 to 16 bits. Its acquisition chain supports both continuous-time and on-request conversion modes, with conversion time ranging from 133 cycles/f_S (12-bit) to 1027 cycles/f_S (16-bit).

Digital control is handled via a 2-WIRE interface with dedicated READY flag output and GPIO-configurable D0/D1 pins that support dual roles: digital I/O for sensor bias/reset or analog reference input/output (REFIN/REFOUT). The integrated charge pump (VPUMP) ensures stable analog switching when VBATT falls below 3 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	6–16 bits; selectable via OSR and NELCONV register settings-enables dynamic trade-off between precision and throughput.
Differential Input Range	±2.42 mV at G = 1000, ±24.2 mV at G = 100, ±2.42 V at G = 1-supports direct connection to MEMS pressure cells and RTDs.
Programmable Gain	1/12 to 1000 V/V across three PGAs-allows single-chip adaptation to diverse sensor sensitivities without external op-amps.
Supply Current	250 µA @ 16-bit/500 S/s (VBATT = 5.5 V); drops to 150 nA in sleep mode-enables battery-powered industrial sensing nodes.
Interface	2-WIRE (I²C-compatible) up to 400 kHz with START/STOP/REPEATED START timing compliance-simplifies integration with standard microcontrollers.
Reference	Internal trimmed bandgap: 1.22 V ±1% over temperature; externally usable via D0 pin-eliminates need for external reference in most applications.
Operating Temp	−40 °C to +125 °C-qualified for harsh industrial and automotive under-hood environments.

Pinout & Package

Package: MLPD-W-12 (4 mm × 4 mm, wettable flank, 12-pin, RoHS-compliant).

Pin/Terminal	Circuit Role	Design Meaning
1, 2	NC	No internal connection-must be left unconnected or grounded per layout best practice.
3	VBATT	Main power supply input (2.4–5.5 V); powers all analog and digital blocks including charge pump.
4, 13	VSS	Dual ground connections-one for core logic, one for bottom thermal pad-to reduce noise and improve thermal dissipation.
5	READY	Open-drain digital output signaling end-of-conversion; used for interrupt-driven sampling synchronization.
6	D1 / REFIN	Configurable: digital output (sensor bias) or analog input (external reference voltage)-enables flexible reference sourcing.
7	D0 / REFOUT	Configurable: digital output (sensor reset) or analog output (internal 1.22 V reference)-supports self-contained calibration paths.
8	SDA	2-WIRE bidirectional data line with internal pull-up-requires external pull-up resistor for bus operation.
9	SCL	2-WIRE clock input up to 400 kHz-synchronizes register reads/writes and configuration updates.
10	VPUMP	Charge pump output; supplies boosted voltage to analog switches when VBATT < 3 V-ensures consistent ADC performance across wide supply range.
11, 12	AC2 / AC3	Differential analog input pair for sensor bridge or thermistor networks-high common-mode rejection (>72 dB PSRR) minimizes supply noise coupling.

Key Features

Feature	Design Value
ZoomingADC™ Architecture	Adaptive oversampling with OSR = 8–1024 enables real-time resolution adjustment without hardware change-ideal for multi-sensor systems with varying SNR requirements.
Three-Stage PGA	Independent gain/offset control per stage (PGA1–PGA3) allows fine-grained sensor signal conditioning-reduces need for external trimming components.
Sensor Bias/Reset Outputs	D0 and D1 pins provide programmable digital drive (up to 8 mA) to energize resistive sensors or reset capacitive elements-eliminates discrete MOSFETs in compact designs.
Internal Time Base	On-chip 4 MHz RC oscillator eliminates external crystal-reduces BOM count and PCB area in cost-sensitive industrial modules.
Power Reduction Modes	Four analog bias current scaling modes (100%, 75%, 50%, 25%) let designers tune quiescent current vs. noise floor-critical for ultra-low-power wake-on-event systems.

Applications

Industrial Pressure Sensing	Barometric Altitude Monitoring
Use Scenario: High-accuracy differential pressure measurement in HVAC ducts or industrial process lines using MEMS piezoresistive sensors. IC Role / Device Role / Timing Role: Primary A/D converter with integrated PGA gain staging and offset compensation-digitizes mV-level bridge outputs directly. Use Value: 16-bit resolution at 500 S/s with <±1 LSB INL enables sub-0.1% full-scale accuracy without external calibration-reducing field service costs.	Use Scenario: Portable weather stations and drone altitude hold systems requiring stable atmospheric pressure tracking over −40°C to +85°C. IC Role / Device Role / Timing Role: Low-drift, low-noise ADC with internal 1.22 V reference-provides stable conversion baseline independent of supply variation. Use Value: 1.22 V ±1% bandgap reference and 78 dB PSRR ensure <0.5 Pa drift over supply range-meeting IEC 61000-4-5 surge immunity requirements.
Industrial Temperature Sensing	Electronic Compass Calibration
Use Scenario: Precision RTD or thermistor readout in factory automation controllers where long-term stability and EMI resilience are mandatory. IC Role / Device Role / Timing Role: Programmable-gain front-end with sensor offset compensation-handles wide resistance ranges (100 Ω–10 kΩ) and self-heating effects. Use Value: PGA3 offset compensation up to ±63/12 V/V corrects for thermistor nonlinearity and cold-junction offsets-enabling ±0.1°C accuracy over full range.	Use Scenario: Magnetometer signal conditioning in handheld navigation devices where magnetic interference demands high CMRR and low noise. IC Role / Device Role / Timing Role: Differential input pair (AC2/AC3) with >72 dB PSRR and <365 µV RMS PGA3 noise-rejects board-level switching noise during compass heading calculation. Use Value: 16-bit resolution with programmable OSR allows dynamic noise filtering-improves heading resolution by 4× versus fixed 12-bit alternatives.

Industrial Pressure Sensing

Barometric Altitude Monitoring

Use Scenario: High-accuracy differential pressure measurement in HVAC ducts or industrial process lines using MEMS piezoresistive sensors.

IC Role / Device Role / Timing Role: Primary A/D converter with integrated PGA gain staging and offset compensation-digitizes mV-level bridge outputs directly.

Use Value: 16-bit resolution at 500 S/s with <±1 LSB INL enables sub-0.1% full-scale accuracy without external calibration-reducing field service costs.

Use Scenario: Portable weather stations and drone altitude hold systems requiring stable atmospheric pressure tracking over −40°C to +85°C.

IC Role / Device Role / Timing Role: Low-drift, low-noise ADC with internal 1.22 V reference-provides stable conversion baseline independent of supply variation.

Use Value: 1.22 V ±1% bandgap reference and 78 dB PSRR ensure <0.5 Pa drift over supply range-meeting IEC 61000-4-5 surge immunity requirements.

Industrial Temperature Sensing

Electronic Compass Calibration

Use Scenario: Precision RTD or thermistor readout in factory automation controllers where long-term stability and EMI resilience are mandatory.

IC Role / Device Role / Timing Role: Programmable-gain front-end with sensor offset compensation-handles wide resistance ranges (100 Ω–10 kΩ) and self-heating effects.

Use Value: PGA3 offset compensation up to ±63/12 V/V corrects for thermistor nonlinearity and cold-junction offsets-enabling ±0.1°C accuracy over full range.

Use Scenario: Magnetometer signal conditioning in handheld navigation devices where magnetic interference demands high CMRR and low noise.

IC Role / Device Role / Timing Role: Differential input pair (AC2/AC3) with >72 dB PSRR and <365 µV RMS PGA3 noise-rejects board-level switching noise during compass heading calculation.

Use Value: 16-bit resolution with programmable OSR allows dynamic noise filtering-improves heading resolution by 4× versus fixed 12-bit alternatives.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-resolution sensor ADC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADS1118IRUGT	16-bit SAR ADC with internal oscillator and temperature sensor; no integrated PGA stages-requires external op-amp for gain scaling.	Lacks on-chip sensor bias outputs (D0/D1) and programmable offset compensation-needs additional discrete components for transducer excitation.	Choose when system already includes precision op-amps and requires integrated temperature monitoring-not optimal for minimalist sensor node designs.
MAX11200EEE+	24-bit delta-sigma ADC with PGA (1–128×); no 2-WIRE interface-uses SPI only; higher power (350 µA @ 10 S/s).	Supports higher resolution but lacks READY flag and GPIO-configurable reference pins-less suitable for interrupt-driven, low-latency sensor polling.	Prefer when absolute highest resolution (24-bit) is required and SPI infrastructure exists-avoid if 2-WIRE compatibility or ultra-low standby current (<200 nA) is mandatory.

Compared with ADS1118IRUGT and MAX11200EEE+, the SX8725E083TDT uniquely integrates PGA-based gain/offset tuning, dual-purpose GPIOs for sensor control, and 2-WIRE compatibility in a 4×4 mm package-making it the only option supporting complete transducer signal chain management without external support ICs.

Availability

SX8725E083TDT is available at Aetrix Electronics and suitable for industrial pressure sensing, barometric altitude monitoring, and electronic compass calibration requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for SX8725E083TDT 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

Semtech Corporation is a U.S.-based fabless semiconductor company specializing in high-performance analog and mixed-signal ICs for sensing, wireless, and power management applications.

The SX8725E083TDT belongs to Semtech's ZoomingADC™ family-designed specifically for ultra-low-power, high-accuracy digitization of miniature analog sensors in industrial and portable instrumentation.

FAQ

What is the maximum achievable resolution and sample rate for SX8725E083TDT?

The SX8725E083TDT supports up to 16-bit resolution with a maximum throughput of 0.485 kSps (485 samples per second) at full resolution. This occurs when OSR = 512 and NELCONV = 2, with f_S = 250 kHz. At lower resolutions-such as 12-bit-the device achieves up to 1.88 kSps. These values are confirmed in the ZoomingADC Specifications table (page 6) and Timing Characteristics section (page 8) of the official datasheet.

Does SX8725E083TDT require an external crystal or oscillator?

No, the SX8725E083TDT includes an internal 4 MHz RC oscillator as its default time base, eliminating the need for an external crystal. This is documented in the Circuit Description section (page 10) and Block Diagram (Figure 3). The internal oscillator supports all standard operating modes-including programmable resolution, gain, and power reduction-without external timing components.

Can SX8725E083TDT operate with a 3.3 V supply, and how does that affect performance?

Yes, SX8725E083TDT operates across 2.4 V to 5.5 V, including standard 3.3 V rails. At 3.3 V, typical active current drops to 850 µA (16-bit @ 1 kS/s) versus 1000 µA at 5.5 V, and internal reference voltage remains stable at 1.22 V ±1%. PSRR is specified at 72 dB for 3 V supplies-slightly lower than 78 dB at 5 V-but still sufficient for industrial noise environments.

How are the D0 and D1 pins configured for reference input/output functionality in SX8725E083TDT?

The D0 and D1 pins of SX8725E083TDT are reconfigured as REFOUT and REFIN by setting VREF_D0_OUT = 1 and VREF_D1_IN = 1 in the RegMode register (page 11). When enabled, D0 outputs the internal 1.22 V bandgap reference, and D1 accepts an external reference-bypassing their default digital I/O behavior. This dual-mode capability is unique to the SX8725E083TDT and supports flexible calibration architectures.

What is the purpose of the VPUMP pin on SX8725E083TDT, and when must it be used?

The VPUMP pin on SX8725E083TDT supplies boosted voltage to internal analog switches when VBATT falls below 3 V. It is automatically activated if MULT_FORCE_ON = 0 and MULT_FORCE_OFF = 0 in RegMode (page 12), ensuring consistent ADC performance across the full 2.4–5.5 V supply range. A 1–10 nF capacitor to ground is required-no external circuitry needed beyond the decoupling cap.

SX8725E083TDT Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Package/Case:: 12-WFDFN Exposed Pad

Series:: ZoomingADC™

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Data Acquisition System (DAS)

Input Type:: Differential

Output Type:: Digital

Current - Supply:: -

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 12-MLPD-WEP (4x4)

SX8725E083TDT FAQ

1.How can I place an order for SX8725E083TDT through Aetrix?

Please submit a Request for Quotation (RFQ) for SX8725E083TDT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

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The price and inventory of SX8725E083TDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SX8725E083TDT is usually 5 days.

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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 SX8725E083TDT?

For technical support, including SX8725E083TDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SX8725E083TDT requirements.

6.How does Aetrix verify that SX8725E083TDT is sourced from the original manufacturer or authorized distributors?

All SX8725E083TDT 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 SX8725E083TDT meets industry standards.

7.What is the process for return or replacement of SX8725E083TDT?

All SX8725E083TDT units undergo pre-shipment inspection (PSI). If there is an issue with SX8725E083TDT, 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 SX8725E083TDT part is unused and in its original packaging.

Return procedure for SX8725E083TDT:

1.Submit a request within 90 days.

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

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