My Inquiry
My Account
Texas Instruments ADS1240EG4
- Part No.:
- ADS1240EG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADS1240EG4.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,866
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADS1240EG4 from Texas Instruments is a 24-bit delta-sigma analog-to-digital converter (ADC) with simultaneous 50Hz/60Hz rejection (–90dB min), 0.0015% INL, 21-bit effective resolution at PGA = 1, and up to eight configurable analog input/data I/O pins. It operates from 2.7V to 5.25V, consumes 600µW, and supports external differential reference inputs from 0.1V to 5V - deployed in high-precision weigh scales and industrial process transmitters.
For engineers reviewing the ADS1240EG4 datasheet, ADS1240EG4 pinout, ADS1240EG4 application, or ADS1240EG4 equivalent, key selection criteria include its single-cycle settling FIR filter, programmable gain amplifier (1–128), on-chip burnout current sources for sensor fault detection, SPI-compatible serial interface, and guaranteed no-missing-codes performance across temperature.
Technical Context
The ADS1240EG4 implements a second-order delta-sigma modulator with a 1279-tap linear-phase FIR digital filter, enabling simultaneous 50Hz and 60Hz notch rejection at selectable data rates (3.75Hz/7.5Hz/15Hz). Its multiplexed input architecture supports up to four single-ended or two differential analog channels, with AINCOM serving as common or additional input.
It integrates a chopper-stabilized FET-input buffer (5GΩ impedance when enabled), programmable offset DAC (±VREF/(2•PGA)), and dual 2µA burnout current sources for open/short sensor diagnostics. Calibration commands (SELFCAL, SYSOCAL, SYSGCAL) correct internal and system-level offset/gain errors without requiring external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit no missing codes - guarantees monotonicity and full dynamic range utilization in precision measurement systems. |
| Effective Resolution | 21 bits at PGA = 1, 19 bits at PGA = 128 - defines usable noise-free code count for low-noise signal acquisition. |
| INL | ±0.0015% of full scale - limits absolute accuracy error in calibrated high-end instrumentation. |
| Power Consumption | 600µW typical at 5V - enables battery-powered portable instrumentation with extended runtime. |
| Simultaneous Rejection | –90dB minimum at 50Hz & 60Hz - eliminates mains interference without external filtering in industrial environments. |
| Input Channels | Up to 4 single-ended or 2 differential inputs - supports multi-sensor configurations in smart transmitters. |
| Reference Input | Differential, 0.1V–5V range - allows ratiometric sensing with external references or precision voltage sources. |
Pinout & Package
ADS1240EG4 is housed in a 24-pin SSOP package (7.5mm × 5.7mm, 0.635mm pitch) with exposed pad for thermal management. Pin functions are electrically validated per TI SBAS173F Rev F.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DVDD, AVDD | Digital & analog power supplies | Separate 2.7–5.25V rails minimize digital noise coupling into analog conversion path. |
| DGND, AGND | Digital & analog ground terminals | Isolated ground planes required; max ±0.3V potential difference prevents ground-loop errors. |
| VREF+, VREF– | Differential reference inputs | Accepts external reference up to 5V; enables ratiometric measurements with bridge sensors or RTDs. |
| AIN0/D0–AIN3/D3 | Configurable analog input / data I/O | Four bidirectional pins support mixed-signal I/O expansion without external GPIOs. |
| AINCOM | Analog input common | Provides reference node for differential measurements or serves as fifth analog input. |
| BUFEN | Buffer enable control | Active-high signal activates 5GΩ input impedance buffer for high-Z transducer interfacing. |
| SCLK, DIN, DOUT, CS, POL, DRDY | SPI-compatible serial interface | Full-duplex communication with Schmitt-trigger inputs ensures robust timing in noisy industrial settings. |
Key Features
| Feature | Design Value |
|---|---|
| Single-cycle settling FIR filter | Delivers valid conversion result immediately after channel change - eliminates settling delay in multiplexed sensor arrays. |
| Programmable gain amplifier (1–128) | Enables sub-100nV resolution on low-level signals (e.g., 39mV FS at PGA=128) without external amplification stages. |
| On-chip burnout current sources (2µA) | Detects open-circuit (full-scale output) or short-circuit (near-zero output) sensor faults autonomously. |
| Offset DAC (8-bit, ±VREF/(2•PGA)) | Compensates for sensor offset drift in real time without degrading ADC linearity or noise performance. |
| Self and system calibration | SELFCAL/SELFOCAL/SELFGCAL commands correct internal errors; SYSOCAL/SYSGCAL nullify external sensor/PCB errors. |
Applications
| Weigh Scales | Industrial Process Transmitters |
|---|---|
Use Scenario: High-accuracy load cell readout in platform scales and hopper systems with 24-bit resolution requirements. IC Role / Device Role / Timing Role: Primary sigma-delta ADC digitizing mV-level Wheatstone bridge outputs with integrated PGA and burnout diagnostics. Use Value: Eliminates need for external instrumentation amplifier and discrete fault detection circuitry, reducing BOM cost and board space. |
Use Scenario: 4–20mA loop-powered transmitter measuring pressure, temperature, or flow using RTD or strain gauge sensors. IC Role / Device Role / Timing Role: Precision front-end ADC with ratiometric reference support and self-calibration for long-term stability over temperature. Use Value: Maintains ±0.0015% INL across –40°C to +85°C, enabling Class A metrology compliance without frequent recalibration. |
| Liquid Chromatography Detectors | Portable Blood Analysis Devices |
Use Scenario: Low-noise signal acquisition from photodiode or electrochemical sensors in HPLC/GC systems. IC Role / Device Role / Timing Role: Low-power, high-resolution ADC with simultaneous 50/60Hz rejection operating from battery supply. Use Value: 600µW consumption extends field-deployable instrument runtime; 21-bit ENOB captures subtle peak amplitude variations. |
Use Scenario: Point-of-care glucose or hemoglobin meters requiring compact, low-drift analog front end. IC Role / Device Role / Timing Role: Integrated ADC with on-chip buffer and offset DAC for direct connection to amperometric biosensors. Use Value: 5GΩ input impedance prevents loading of microamp-level sensor currents; burnout detection alerts for electrode disconnection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1241IPWR | 8-channel analog input (vs 4 on ADS1240EG4); identical core ADC, filter, and calibration architecture. | Supports up to 4 differential or 8 single-ended inputs - suitable for multi-sensor systems where ADS1240EG4's 4-channel limit is insufficient. | Select ADS1241IPWR when expanding channel count is required; same PCB layout not possible due to 28-pin TSSOP vs 24-pin SSOP. |
| AD7190BRUZ | 24-bit, 4.8kHz max output rate, 50/60Hz rejection, but requires external crystal oscillator and lacks integrated burnout sources. | Higher throughput for dynamic measurements; no on-chip sensor health monitoring - demands external fault detection circuitry. | Choose AD7190BRUZ for higher-speed applications (>15Hz) where burnout diagnostics are handled externally or omitted. |
Compared with ADS1240EG4, ADS1241IPWR offers more input flexibility in a larger package, while AD7190BRUZ trades integrated diagnostics for higher speed and different clocking architecture - neither is pin-compatible, and all three require distinct layout and firmware adaptation.
Availability
ADS1240EG4 is available at Aetrix Electronics and suitable for industrial process control, weigh scales, and portable instrumentation requiring stable component supply, long-lifecycle support, and traceable sourcing for medical and safety-critical designs.
Supply support for ADS1240EG4 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade IC design.
The ADS1240EG4 belongs to TI's high-precision delta-sigma ADC product line, engineered specifically for low-noise, low-power, high-accuracy measurement in harsh industrial and portable environments - emphasizing reliability, integrated diagnostics, and ease of system integration.
FAQ
What is the maximum sampling rate supported by the ADS1240EG4?
The ADS1240EG4 supports programmable output data rates of 3.75Hz, 7.5Hz, and 15Hz when using a 2.4576MHz master clock. Its digital filter is optimized for simultaneous 50Hz/60Hz rejection at these rates. Higher rates are not supported - the architecture prioritizes noise rejection and resolution over speed, making ADS1240EG4 ideal for static or slowly varying sensor signals like load cells or RTDs.
Does the ADS1240EG4 require an external crystal or can it use an oscillator?
Yes, the ADS1240EG4 accepts either an external crystal (e.g., 2.4576MHz or 4.9152MHz) connected between XIN and XOUT, or a CMOS-compatible external clock source applied to XIN only. When using a crystal, external load capacitors (0–20pF) are required per TI SBAS173F recommendations. An oscillator simplifies design by eliminating capacitor tuning but must meet voltage and drive strength specifications.
How does the burnout current feature work on the ADS1240EG4?
The ADS1240EG4 integrates two 2µA current sources - one tied to AIN+ and one to AIN– - activated via the BOCS bit in the SETUP register. During open-circuit conditions, the sources pull inputs to AVDD and AGND, producing full-scale output (0x7FFFFF). During short-circuit, both inputs reach the same potential, yielding near-zero output. This enables autonomous sensor health monitoring without external components.
Can the ADS1240EG4 operate with a 3.3V supply?
Yes, the ADS1240EG4 operates across AVDD = 2.7V to 5.25V and DVDD = 2.7V to 5.25V. At AVDD = 3.3V, it maintains full 24-bit no-missing-codes performance, 0.0015% INL, and 21-bit effective resolution (PGA = 1). Reference input range adjusts accordingly: up to 1.25V (RANGE = 0) or 2.5V (RANGE = 1), ensuring compatibility with common 3.3V system references.
What is the purpose of the BUFEN pin on the ADS1240EG4?
The BUFEN pin on the ADS1240EG4 enables or disables the integrated chopper-stabilized FET-input buffer. When asserted high, it raises input impedance from 5MΩ/PGA to 5GΩ - critical for interfacing with high-impedance sensors (e.g., pH electrodes or piezoresistive elements) without signal degradation. Buffer activation increases supply current, especially at high PGA settings, so it should be used only when needed.
ADS1240EG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 15
- Number of Inputs:
- 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-PGA-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 3.3V, 5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.25V
- Features:
- PGA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 24-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1240EG4 FAQ
1.How can I place an order for ADS1240EG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1240EG4 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 ADS1240EG4 reliable?
The price and inventory of ADS1240EG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1240EG4 is usually 5 days.
3.What payment methods are accepted for ADS1240EG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1240EG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1240EG4?
ADS1240EG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1240EG4 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 ADS1240EG4?
For technical support, including ADS1240EG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1240EG4 requirements.
6.How does Aetrix verify that ADS1240EG4 is sourced from the original manufacturer or authorized distributors?
All ADS1240EG4 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 ADS1240EG4 meets industry standards.
7.What is the process for return or replacement of ADS1240EG4?
All ADS1240EG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS1240EG4, 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 ADS1240EG4 part is unused and in its original packaging.
Return procedure for ADS1240EG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADS1240EG4 Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
