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Texas Instruments ADS1253EG4
- Part No.:
- ADS1253EG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADS1253EG4.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,701
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Product details
Overview
ADS1253EG4 from Texas Instruments is a 24-bit delta-sigma analog-to-digital converter (ADC) with four differential input channels, 20.8 kHz maximum data rate, 19-bit effective resolution at 20 kHz, ±15 ppm INL, and 1.8 ppm rms noise-designed for high-precision measurement in cardiac diagnostics and chromatography systems.
For engineers reviewing the ADS1253EG4 datasheet, ADS1253EG4 pinout, ADS1253EG4 application, or ADS1253EG4 equivalent, this page delivers verified technical context, package mapping, real-world use cases, and validated alternative options for precision sensor signal acquisition in industrial and medical instrumentation.
Technical Context
The ADS1253EG4 implements a 4th-order delta-sigma modulator with sinc⁵ digital filtering, achieving no missing codes across its full 24-bit range. Its modulator clock is derived from an external 8 MHz system clock (CLK ÷ 6), yielding a fixed 1.333 MHz modulator frequency and 64× oversampling ratio.
It supports synchronous serial communication via CMOS-compatible SCLK and DOUT/DRDY pins, enabling low-cost isolation. Channel selection is controlled by CHSEL0/CHSEL1 logic inputs, and the device features power-down and sync modes for multi-converter coordination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24 bits - guarantees no missing codes over full-scale range |
| Effective Resolution | 19 bits at 20 kHz - delivers 1.8 ppm rms noise performance |
| Data Rate | 20.8 kHz max - sets –3 dB bandwidth to 4.24 kHz with 8 MHz CLK |
| INL | ±15 ppm max - ensures <0.0002% full-scale linearity error |
| Reference Range | 0.5 V to 4.096 V - enables scalable full-scale input from ±0.5 V to ±4.096 V |
| Power Consumption | 8 mW at 20 kHz - optimized for low-noise, high-resolution portable instrumentation |
| Input Channels | 4 differential - supports multiplexed sensor arrays without external MUX |
Pinout & Package
ADS1253EG4 is housed in a 16-pin SSOP (DBQ) package with exposed pad, rated for –40°C to +85°C operation. Pin functions are validated per TI SBAS199B Rev. September 2007.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH1+ / CH1– CH2+ / CH2– CH3+ / CH3– CH4+ / CH4– | Differential analog inputs | Four independent fully differential input pairs; each accepts bipolar signals up to ±VREF |
| CHSEL0 / CHSEL1 | Digital channel select inputs | Schmitt-trigger inputs that configure active channel (00=CH1, 01=CH2, 10=CH3, 11=CH4) |
| VREF | Analog reference voltage input | Accepts 0.5 V–4.096 V external reference; draws 32 µA typical at 8 MHz CLK |
| +VDD / GND | Power supply terminals | +5 V single supply (4.75–5.25 V); requires local decoupling per layout guidelines |
| CLK | System clock input | CMOS/Schmitt-trigger input; 8 MHz nominal; determines data rate and filter settling |
| SCLK | Serial clock input | Independent CMOS clock; controls data read timing and triggers power-down/sync modes |
| DOUT/DRDY | Combined data output / ready indicator | Open-drain capable; pulses LOW to signal valid data, then shifts 24-bit result MSB-first |
Key Features
| Feature | Design Value |
|---|---|
| Delta-sigma architecture with sinc⁵ filter | Enables 24-bit no-missing-code performance and programmable notch rejection at integer multiples of data rate |
| Four-channel differential input mux | Reduces BOM count and PCB area vs. discrete ADC + external MUX; supports 4 kHz effective sample rate per channel |
| Sync mode for multi-device coordination | Allows simultaneous sampling across multiple ADS1253EG4 units using shared SCLK assertion |
| Power-down mode | Reduces current to ≤1 µA; activated by holding SCLK HIGH ≥20 DRDY cycles |
| Flexible reference interface | Supports buffered or unbuffered references; noise performance improves as VREF increases (e.g., 1.8 ppm → 1.2 ppm at 5 V) |
Applications
| Cardiac Diagnostics | Chromatography Systems |
|---|---|
Use Scenario: High-fidelity acquisition of ECG/EEG signals with sub-microvolt resolution and 60 Hz noise rejection. IC Role / Device Role / Timing Role: Primary ADC capturing differential biopotential waveforms at 20 kHz with synchronized sampling across lead pairs. Use Value: 19-bit effective resolution and 90–102 dB CMRR enable detection of low-amplitude arrhythmia markers without analog gain stages. |
Use Scenario: Precision quantification of detector output in liquid/gas chromatographs requiring stable baseline and low drift. IC Role / Device Role / Timing Role: Front-end digitizer for photodiode or thermal conductivity detector outputs, operating at 10–20 kHz with programmable digital filtering. Use Value: 15 ppm INL and 0.07 ppm/°C offset drift ensure repeatable peak integration across temperature-varying lab environments. |
| Smart Industrial Transmitters | Portable Weigh Scales |
Use Scenario: 4–20 mA loop-powered field transmitter measuring pressure, flow, or temperature with HART compatibility. IC Role / Device Role / Timing Role: Isolated ADC interfacing strain gauge or RTD bridges; uses CHSEL0/CHSEL1 for dual-sensor redundancy or calibration channel switching. Use Value: Four integrated differential inputs eliminate external multiplexer, reducing power and board space while maintaining 24-bit traceability. |
Use Scenario: Battery-operated platform scale with >100,000-count resolution and auto-zero compensation. IC Role / Device Role / Timing Role: Low-power ADC sampling load cell bridge at 10 kHz during active weighing; enters power-down between readings. Use Value: 5 mW consumption at 10 kHz extends battery life; 1.8 ppm rms noise enables <10 µg resolution on 30 kg platforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1254IPWT | Separate analog/digital supplies (AVDD/DVDD), improved PSRR (88 dB), same 24-bit/20.8 kHz specs | Better suited for mixed-signal systems with noisy digital domains or stringent PSRR requirements | Select when supply isolation is critical; not pin-compatible due to different power pin allocation |
| AD7730BRUZ | 24-bit sigma-delta ADC, 1.2 kHz max rate, integrated PGA (1–128), SPI interface, TSSOP-24 | Lower speed but higher integration for low-frequency bridge sensors; lacks channel mux and sync mode | Prefer for slow, high-gain weigh scale or RTD front ends where PGA eliminates external op-amps |
Compared with ADS1254IPWT and AD7730BRUZ, the ADS1253EG4 uniquely balances 20 kHz throughput, 4-channel mux, and single-supply simplicity-making it optimal for compact, medium-speed precision instruments where layout area and supply count are constrained.
Availability
ADS1253EG4 is available at Aetrix Electronics and suitable for cardiac diagnostics, chromatography systems, smart industrial transmitters, and portable weigh scales requiring stable component supply and long-term production continuity.
Supply support for ADS1253EG4 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 leadership in precision data converters and industrial signal chain solutions.
The ADS1253EG4 belongs to TI's high-accuracy delta-sigma ADC family, engineered specifically for demanding measurement applications including medical diagnostics, analytical instrumentation, and process control where resolution, noise, and channel density are critical.
FAQ
What is the maximum data rate supported by the ADS1253EG4?
The ADS1253EG4 achieves a maximum data rate of 20.8 kHz when operated with an 8 MHz system clock (CLK). This rate scales linearly with CLK frequency-e.g., 4.9152 MHz CLK yields 12.8 kHz-and directly determines the –3 dB bandwidth (0.2035 × data rate) and digital filter notch placement.
Does the ADS1253EG4 require an external reference voltage?
Yes, the ADS1253EG4 requires an external reference voltage applied to the VREF pin, supporting 0.5 V to 4.096 V (up to VDD). It draws 32 µA typical at 8 MHz CLK. A buffered reference (e.g., REF3040 + OPA350) is recommended to maintain low noise and stability, as shown in TI's Figure 2.
How many analog input channels does the ADS1253EG4 support?
The ADS1253EG4 supports four fully differential analog input channels (CH1–CH4), selected via CHSEL0 and CHSEL1 logic inputs. Each channel pair operates with bipolar input range ±VREF and shares the same 24-bit conversion engine, enabling time-multiplexed high-resolution acquisition without external components.
What package type is used for the ADS1253EG4?
The ADS1253EG4 is packaged in a 16-pin SSOP (DBQ) with exposed thermal pad, specified for operation from –40°C to +85°C. The "G4" suffix denotes TI's green (RoHS-compliant) packaging standard, and the device is supplied in rail packaging (100 units) or tape-and-reel (2500 units).
Can the ADS1253EG4 synchronize multiple converters?
Yes, the ADS1253EG4 supports synchronization of multiple units via its SCLK pin: holding SCLK HIGH for ≥4 consecutive DOUT/DRDY cycles resets all modulators, and release on the falling edge ensures simultaneous sampling. This is essential for phase-coherent multi-channel acquisition in systems like multi-lead ECG or distributed sensor nodes.
ADS1253EG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 20k
- Number of Inputs:
- 4
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1253EG4 FAQ
1.How can I place an order for ADS1253EG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1253EG4 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 ADS1253EG4 reliable?
The price and inventory of ADS1253EG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1253EG4 is usually 5 days.
3.What payment methods are accepted for ADS1253EG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1253EG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1253EG4?
ADS1253EG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1253EG4 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 ADS1253EG4?
For technical support, including ADS1253EG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1253EG4 requirements.
6.How does Aetrix verify that ADS1253EG4 is sourced from the original manufacturer or authorized distributors?
All ADS1253EG4 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 ADS1253EG4 meets industry standards.
7.What is the process for return or replacement of ADS1253EG4?
All ADS1253EG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS1253EG4, 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 ADS1253EG4 part is unused and in its original packaging.
Return procedure for ADS1253EG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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