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Texas Instruments ADS1232IPWRG4
- Part No.:
- ADS1232IPWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADS1232IPWRG4.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,287
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Product details
Overview
ADS1232IPWRG4 from Texas Instruments is a 24-bit delta-sigma analog-to-digital converter optimized for bridge sensor front-ends, featuring a two-channel differential input with integrated temperature sensor, selectable PGA gains of 1/2/64/128, and 23.5-bit effective resolution at 10SPS. It delivers 100dB simultaneous 50Hz/60Hz rejection and supports ratiometric measurements using external reference up to 5V in weigh scale and industrial pressure sensing systems.
For engineers reviewing the ADS1232IPWRG4 datasheet, ADS1232IPWRG4 pinout, ADS1232IPWRG4 application, or ADS1232IPWRG4 equivalent, key selection criteria include its TSSOP-24 package, internal oscillator clocking, two-wire serial interface compatibility with MSP430 microcontrollers, and on-demand offset calibration without register programming.
Technical Context
The ADS1232IPWRG4 integrates a third-order delta-sigma modulator with fourth-order digital filter, low-drift chopper-stabilized PGA, and input multiplexer controlled by A0 and TEMP pins. Its analog signal path supports ±2.5V full-scale input at gain=1 and ±19.5mV at gain=128, with rail-to-rail operation only at gains 1 and 2.
It operates across –40°C to +105°C with AVDD/DVDD from 2.7V to 5.3V, uses dedicated pin-driven control (no registers), and provides dual-mode output via DRDY/DOUT - asserting DRDY low for data-ready indication and shifting out MSB-first data on SCLK rising edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit no-missing-codes architecture supporting high-precision bridge sensor digitization |
| Effective Resolution | 23.5 bits at 10SPS, gain = 1 - enables sub-1µV input-referred measurement capability |
| Noise-Free Resolution | 19.2 bits at 10SPS, gain = 64 - ensures stable 19-bit noise-free output for strain gauge applications |
| Data Rates | Selectable 10SPS (for 50/60Hz rejection) or 80SPS (for faster sampling) via SPEED pin |
| PGA Gains | 1, 2, 64, 128 - configured by GAIN[1:0] pins to match bridge output range from ±2.5V to ±19.5mV |
| Input Channels | Two differential analog inputs (AINP1/AINN1, AINP2/AINN2) plus integrated temperature sensor on TEMP pin |
| Reference Support | Ratiometric operation with external VREF up to 5V; REFP/REFN pins accept 1.5V–AVDD reference range |
Pinout & Package
TSSOP-24 package (7.8mm × 6.4mm), lead pitch 0.65mm, thermally enhanced for industrial ambient operation up to +105°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP1 / AINN1 | Differential analog input channel 1 | Primary bridge sensor connection; supports ±2.5V full-scale at gain=1 |
| AINP2 / AINN2 | Differential analog input channel 2 | Secondary sensor or redundancy path; selected via A0/TEMP logic |
| TEMP | Temperature sensor select | High = disconnects analog inputs and connects on-chip diode pair for ambient monitoring |
| DRDY/DOUT | Dual-function serial output | DRDY active-low flag indicates valid conversion; DOUT outputs MSB-first data on SCLK rising edge |
| GAIN0 / GAIN1 | PGA gain configuration | Binary-coded selection of 1/2/64/128 gain per Table 7-3; sets input dynamic range |
| SPEED | Data rate control | High = 80SPS, Low = 10SPS - determines filter settling and power consumption |
| PDWN | Power-down control | Pulse-low resets ADC and enters ultra-low-power shutdown (<1µA) |
| CLKIN/XTAL1 | Internal/external clock source | Tied low activates precision internal oscillator; accepts 0.2–8MHz crystal or external clock |
| REFP / REFN | Reference voltage inputs | Accept ratiometric reference up to 5V; define full-scale range as VREF / PGA gain |
| AGND / DGND | Analog/digital ground | Separate ground planes required for noise isolation; connected at single point on PCB |
Key Features
| Feature | Design Value |
|---|---|
| Complete bridge sensor front-end | Integrates MUX, PGA, ΔΣ ADC, and digital filter - eliminates need for external signal conditioning |
| On-demand offset calibration | Initiated via SCLK pulse; no software registers or timing constraints - simplifies firmware integration |
| Two-wire serial interface | DRDY/DOUT + SCLK only - directly interfaces with MSP430 GPIO without protocol stack overhead |
| 100dB 50/60Hz simultaneous rejection | Hardware-filtered at 10SPS mode - removes mains interference without external notch filters |
| Integrated temperature sensor | Diode-based sensing with 379µV/°C coefficient - enables cold-junction compensation in load cell systems |
Applications
| Weigh Scales | PLC Weight Modules |
|---|---|
Use Scenario: High-accuracy platform scales measuring 0.1g increments over 30kg range using four-wire load cells. IC Role / Device Role / Timing Role: Primary ADC digitizing mV-level bridge output; handles ratiometric reference tracking and temperature compensation. Use Value: 23.5-bit effective resolution and 17nV RMS noise at gain=128 enable sub-100ppm linearity without post-calibration. | Use Scenario: DIN-rail mounted industrial weight controller with isolated analog I/O and Modbus RTU communication. IC Role / Device Role / Timing Role: Sensor interface IC converting load cell signals into calibrated digital values for PLC CPU ingestion. Use Value: 10SPS data rate with 100dB 50/60Hz rejection ensures stable readings in electrically noisy factory environments. |
| Pressure Sensors | Strain Gauge Monitoring |
Use Scenario: HVAC duct static pressure transducer with 0–100Pa range and ±0.1%FS accuracy requirement. IC Role / Device Role / Timing Role: Precision ADC capturing low-output silicon piezoresistive bridge signals with integrated temperature correction. Use Value: Internal temperature sensor and PGA gain switching allow automatic range adaptation and drift compensation. | Use Scenario: Structural health monitoring system attaching foil strain gauges to steel beams in bridges. IC Role / Device Role / Timing Role: Low-noise digitizer for quarter-bridge configurations requiring high CMRR and long-term stability. Use Value: 95dB CMRR at DC and ±0.0004% INL ensure reliable microstrain detection under thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision bridge-sensor ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1230IPW | Single-channel, no temperature sensor, same PGA and filter architecture | Lacks second input and TEMP function - suitable only for single-sensor systems | Select when cost sensitivity outweighs multi-channel or temperature monitoring needs |
| AD7792BRUZ | 24-bit ΣΔ ADC with 3-channel mux, programmable current sources, SPI interface | Requires SPI register configuration; includes excitation current for RTD but no integrated temp sensor | Choose for mixed-sensor systems needing RTD or thermocouple support alongside bridge inputs |
Compared with ADS1230IPW and AD7792BRUZ, the ADS1232IPWRG4 uniquely combines dual differential inputs, on-chip temperature sensing, and pin-driven simplicity - making it optimal for compact, low-firmware-overhead weigh scale designs where layout space and calibration time are constrained.
Availability
ADS1232IPWRG4 is available at Aetrix Electronics and suitable for weigh scales, PLC weight modules, and pressure sensors requiring stable component supply with guaranteed long-term industrial availability.
Supply support for ADS1232IPWRG4 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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The ADS123x product line was designed specifically for high-accuracy bridge sensor signal chains in industrial weighing and force measurement, emphasizing noise performance, EMI robustness, and ease of hardware integration.
FAQ
What is the maximum recommended external reference voltage for the ADS1232IPWRG4?
The ADS1232IPWRG4 supports external reference voltages up to 5V applied between REFP and REFN pins. The reference input range is specified as 1.5V to AVDD, and AVDD may be as high as 5.3V, but TI recommends limiting VREF to ≤5V to maintain absolute maximum ratings compliance and ensure long-term reliability across temperature extremes.
Does the ADS1232IPWRG4 require external configuration registers to operate?
No, the ADS1232IPWRG4 uses pin-driven control - all functions including data rate (SPEED), PGA gain (GAIN0/GAIN1), input selection (A0/TEMP), and calibration (SCLK pulse) are managed directly through dedicated digital inputs. There are no internal registers to program, eliminating firmware complexity and initialization sequences required by SPI/I²C ADCs.
How does the temperature sensor in the ADS1232IPWRG4 function, and what is its accuracy?
The ADS1232IPWRG4 integrates a diode-based temperature sensor activated by setting the TEMP pin high. It measures the voltage difference between two scaled diodes (1× and 80×), yielding a nominal 111.7mV at 25°C with 379µV/°C coefficient. Accuracy is limited by PGA gain dependency - usable only at gains 1 or 2, and uncalibrated drift is ±500nV/°C typical, requiring system-level calibration for <1°C error.
Can the ADS1232IPWRG4 interface directly with an MSP430 microcontroller without level-shifting?
Yes, the ADS1232IPWRG4 is fully compatible with MSP430 I/O voltage levels. Its digital pins (SCLK, DRDY/DOUT, PDWN, SPEED, GAIN0/GAIN1, A0, TEMP) operate at DVDD-supplied logic levels (2.7V–5.3V), matching MSP430's 3.3V or 5V GPIO ranges. No level-shifting is needed when DVDD = 3.3V or 5V, and the two-wire interface requires only two GPIOs plus optional interrupt on DRDY.
What is the purpose of the CAP pins (9 and 10) on the ADS1232IPWRG4?
Pins 9 and 10 (CAP) on the ADS1232IPWRG4 are PGA bypass terminals requiring a 0.1µF ceramic capacitor connected directly between them. This capacitor stabilizes the internal PGA feedback network, suppresses high-frequency oscillation, and ensures specified noise performance - omission causes gain inaccuracy and increased RMS noise, especially at gains 64 and 128.
ADS1232IPWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 80
- Number of Inputs:
- 2
- 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 ~ 5.3V
- Voltage - Supply, Digital:
- 2.7V ~ 5.3V
- Features:
- PGA
- Operating Temperature:
- -40°C ~ 105°C
- Supplier Device Package:
- 24-TSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1232IPWRG4 FAQ
1.How can I place an order for ADS1232IPWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1232IPWRG4 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 ADS1232IPWRG4 reliable?
The price and inventory of ADS1232IPWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1232IPWRG4 is usually 5 days.
3.What payment methods are accepted for ADS1232IPWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1232IPWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1232IPWRG4?
ADS1232IPWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1232IPWRG4 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 ADS1232IPWRG4?
For technical support, including ADS1232IPWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1232IPWRG4 requirements.
6.How does Aetrix verify that ADS1232IPWRG4 is sourced from the original manufacturer or authorized distributors?
All ADS1232IPWRG4 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 ADS1232IPWRG4 meets industry standards.
7.What is the process for return or replacement of ADS1232IPWRG4?
All ADS1232IPWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS1232IPWRG4, 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 ADS1232IPWRG4 part is unused and in its original packaging.
Return procedure for ADS1232IPWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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