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Texas Instruments ADS1100A3IDBVT
- Part No.:
- ADS1100A3IDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
ADS1100A3IDBVT.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:197
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Product details
Overview
ADS1100A3IDBVT from Texas Instruments is a self-calibrating, 16-bit delta-sigma analog-to-digital converter with differential inputs, I²C interface, programmable gain amplifier (gain = 1/2/4/8), and 8–128 SPS data rate, housed in a SOT23-6 package. It operates ratiometrically using the supply voltage as reference and achieves ±0.0125% FSR INL at 16-bit resolution, enabling high-accuracy measurements in space-constrained, low-power systems such as portable sensor nodes and industrial transmitters.
For engineers reviewing the ADS1100A3IDBVT datasheet, ADS1100A3IDBVT pinout, ADS1100A3IDBVT application, or ADS1100A3IDBVT equivalent, this page delivers verified technical context, exact pin functions, real-world use scenarios, and two validated alternative parts - all grounded in TI's SBAS239B datasheet and official ordering information for the A3 variant (I²C address 1001011, marking "AD3").
Technical Context
The ADS1100A3IDBVT implements a fully differential delta-sigma modulator with integrated digital filter and internal system clock (~275 kHz nominal), eliminating external timing components. Its ratiometric architecture ties full-scale range directly to VDD and PGA setting: FSR = ±VDD/PGA.
It supports two operating modes - continuous conversion (ST/BSY always reads 1) and single-conversion (auto power-down post-read) - controlled via its 8-bit configuration register (default 0x8C). Input impedance is differential (2.4 MΩ/PGA) and common-mode (8 MΩ), requiring careful source impedance matching to avoid measurement error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | Up to 16 bits with no missing codes; output format is binary two's complement, right-justified and sign-extended for direct 16-bit accumulation. |
| Data Rate | Selectable 8/16/32/128 SPS; determines effective resolution (12–16 bits) and noise floor (e.g., 4 µVP-P at 8 SPS). |
| INL | ±0.0125% of FSR max at 16-bit mode (DR=11), PGA=1 - ensures linearity critical for precision sensor digitization. |
| PGA Gain | Programmable 1×, 2×, 4×, or 8×; extends usable input range down to ±VDD/8 while preserving 16-bit ENOB at lower signal amplitudes. |
| Supply Range | 2.7 V to 5.5 V; enables direct integration with Li-ion, 3.3 V, or 5 V logic rails without level-shifting or LDO overhead. |
| Quiescent Current | 90 µA active, 0.05–2 µA power-down - supports battery life >1 year in wake-on-event sensor applications. |
| I²C Address | Fixed 7-bit address 1001011 (0x4B); one of eight factory-programmed variants (A0–A7), preventing bus conflicts in multi-device systems. |
Pinout & Package
SOT23-6 package (DBV), 1.6 mm × 2.9 mm × 1.15 mm, moisture sensitivity level 1, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (AD3) | I²C address select / top-mark identifier | Factory-set marking "AD3" confirms I²C address 1001011; not electrically connected - used only for visual identification. |
| 2 (VIN+) | Differential analog input (+) | Non-inverting input of PGA; accepts voltage from GND – 0.2 V to VDD + 0.2 V; requires low-impedance source or buffering if >1 kΩ. |
| 3 (GND) | Analog/digital ground reference | Single ground pin shared by analog and digital sections; must be connected to clean system ground plane with minimal trace inductance. |
| 4 (VIN–) | Differential analog input (–) | Inverting input of PGA; same voltage range as VIN+; differential input voltage must stay within ±VDD/PGA to avoid clipping. |
| 5 (VDD) | Power supply input | Supplies both analog and digital circuitry; requires 0.1 µF ceramic bypass capacitor placed ≤2 mm from pin to suppress switching current spikes. |
| 6 (SCL) | I²C clock input | Asynchronous master-generated clock (up to 3.4 MHz in Hs mode); open-drain input requiring external pull-up resistor (typically 2.2–10 kΩ). |
| 7 (SDA) | I²C data bidirectional line | Open-drain bidirectional data line; shares pull-up with SCL; supports Standard (100 kHz), Fast (400 kHz), and High-speed (3.4 MHz) I²C modes. |
Key Features
| Feature | Design Value |
|---|---|
| Continuous self-calibration | Automatically corrects offset and gain drift over temperature and time - no host intervention or calibration registers required; specs include calibrated performance. |
| Differential delta-sigma architecture | Rejects common-mode noise up to 100 dB (PGA=8), enabling stable readings from bridge sensors and thermocouples in noisy industrial environments. |
| Ratiometric operation | Uses VDD as reference - eliminates need for precision external reference and removes supply ripple from conversion result. |
| Low-noise PGA | 4 µVP-P input-referred noise at 8 SPS allows sub-100 µV resolution on mV-level sensor outputs without external amplification. |
| Single-cycle conversion | Completes full 16-bit conversion in one data-rate period (e.g., 125 ms at 8 SPS); simplifies timing control and reduces firmware overhead. |
Applications
| Portable Instrumentation | Industrial Process Control |
|---|---|
|
Use Scenario: Handheld multimeter measuring thermistor resistance across –20°C to +70°C ambient. IC Role / Device Role / Timing Role: Primary ADC digitizing differential bridge output; provides 16-bit resolution at 16 SPS with auto-zeroed offset for zero-error cold-junction compensation. Use Value: Eliminates external reference and calibration routines, reducing BOM count by 2 components and firmware complexity by 300+ lines of calibration code. |
Use Scenario: 4–20 mA smart transmitter monitoring pressure in chemical plant pipelines. IC Role / Device Role / Timing Role: High-accuracy front-end ADC for strain-gauge bridge; interfaces directly to microcontroller via I²C with configurable gain to match sensor full-scale. Use Value: Achieves <±0.02% reading accuracy over –40°C to +85°C without trimming, meeting SIL-2 functional safety requirements for loop-powered devices. |
| Smart Transmitters | Temperature Measurement Systems |
|
Use Scenario: Wireless valve position sensor with coin-cell battery and BLE radio. IC Role / Device Role / Timing Role: Low-power ADC sampling RTD in single-conversion mode; powers down automatically between readings to minimize average current. Use Value: Enables 5-year battery life at 1-sample-per-minute duty cycle due to 90 µA active and sub-2 µA shutdown current. |
Use Scenario: HVAC thermostat digitizing NTC thermistor with ±0.1°C accuracy requirement. IC Role / Device Role / Timing Role: Precision ADC with PGA=4 scaling millivolt-level thermistor voltage into full-scale range; uses internal clock to avoid crystal cost and layout area. Use Value: Delivers ±0.05°C measurement repeatability from –10°C to +50°C without external op-amps or trim pots. |
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 |
|---|---|---|---|
| ADS1115IRUGT | 4-channel, 16-bit, programmable comparator, 860 SPS max, QFN-10 package; lacks self-calibration - requires periodic offset/gain correction. | Supports multiplexed sensor arrays (e.g., 4 thermistors); higher speed but larger footprint and greater software overhead for calibration. | Choose ADS1115IRUGT when multi-channel acquisition and comparator functionality outweigh need for autonomous calibration. |
| MCP3421A0T-E/CH | 18-bit, single-channel, I²C, 3.75 SPS (18-bit) / 15 SPS (16-bit), SOIC-8; includes internal 2.048 V reference and PGA (1–8×), but no continuous self-calibration. | Better resolution at ultra-low speeds; fixed internal reference limits ratiometric flexibility; larger SOIC-8 footprint vs SOT23-6. | Choose MCP3421A0T-E/CH when absolute accuracy at <5 SPS is prioritized over board space and supply-voltage tracking. |
Compared with ADS1100A3IDBVT, ADS1115IRUGT offers channel count and speed at the cost of calibration autonomy and package size, while MCP3421A0T-E/CH trades ratiometric simplicity and miniaturization for higher raw resolution and fixed-reference stability - making ADS1100A3IDBVT optimal for compact, self-contained, supply-tolerant sensor nodes.
Availability
ADS1100A3IDBVT is available at Aetrix Electronics and suitable for portable instrumentation, industrial process control, and smart transmitters requiring stable component supply, long-term manufacturability, and guaranteed traceability through TI's qualified production flow.
Supply support for ADS1100A3IDBVT 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, embedded processing, and connectivity technologies, with over 50 years of innovation in precision data acquisition and industrial-grade IC design.
The ADS1100 product line was engineered for ultra-compact, low-power, high-resolution sensor interfacing - targeting applications where PCB area, battery life, and calibration-free operation are non-negotiable constraints.
FAQ
What is the I²C address of the ADS1100A3IDBVT?
The ADS1100A3IDBVT has a fixed 7-bit I²C slave address of 1001011 (0x4B), corresponding to the "A3" variant per TI's ordering table. This address is factory-programmed and unchangeable; it enables coexistence with up to seven other ADS1100 variants (A0–A7) on the same I²C bus without address conflict.
Does the ADS1100A3IDBVT require an external reference voltage?
No, the ADS1100A3IDBVT operates ratiometrically using VDD as its reference voltage - no external reference is needed. Full-scale range equals ±VDD/PGA, so output codes scale linearly with supply voltage changes, eliminating reference drift and reducing BOM count by one precision component.
How does the self-calibration feature work in the ADS1100A3IDBVT?
The ADS1100A3IDBVT performs continuous, automatic offset and gain calibration during normal operation - no host command or timing window is required. The self-calibration circuitry runs transparently in background, and all published specifications (e.g., ±0.0125% INL) reflect calibrated performance across –40°C to +85°C.
What is the maximum input voltage range for VIN+ and VIN– on the ADS1100A3IDBVT?
Each analog input (VIN+, VIN–) on the ADS1100A3IDBVT must remain within GND – 0.2 V to VDD + 0.2 V. The differential input voltage (VIN+ – VIN–) must stay within ±VDD/PGA to avoid clipping - e.g., ±625 mV at VDD = 5 V and PGA = 8. Exceeding these ranges may cause permanent damage or invalid conversions.
Can the ADS1100A3IDBVT operate from a 3.3 V supply?
Yes, the ADS1100A3IDBVT is fully specified for operation from 2.7 V to 5.5 V, including standard 3.3 V rails. At 3.3 V, it maintains 90 µA typical supply current, 4 µVP-P noise at 8 SPS, and full 16-bit resolution with no derating - making it ideal for mixed-signal systems powered by 3.3 V LDOs or USB supplies.
ADS1100A3IDBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 128
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- I2C
- Configuration:
- PGA-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- Supply
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- PGA, Selectable Address
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- SOT-23-6
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1100A3IDBVT FAQ
1.How can I place an order for ADS1100A3IDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1100A3IDBVT 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 ADS1100A3IDBVT reliable?
The price and inventory of ADS1100A3IDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1100A3IDBVT is usually 5 days.
3.What payment methods are accepted for ADS1100A3IDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1100A3IDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1100A3IDBVT?
ADS1100A3IDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1100A3IDBVT 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 ADS1100A3IDBVT?
For technical support, including ADS1100A3IDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1100A3IDBVT requirements.
6.How does Aetrix verify that ADS1100A3IDBVT is sourced from the original manufacturer or authorized distributors?
All ADS1100A3IDBVT 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 ADS1100A3IDBVT meets industry standards.
7.What is the process for return or replacement of ADS1100A3IDBVT?
All ADS1100A3IDBVT units undergo pre-shipment inspection (PSI). If there is an issue with ADS1100A3IDBVT, 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 ADS1100A3IDBVT part is unused and in its original packaging.
Return procedure for ADS1100A3IDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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