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Texas Instruments ADS1100A1IDBVR
- Part No.:
- ADS1100A1IDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
ADS1100A1IDBVR.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,383
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Product details
Overview
ADS1100A1IDBVR 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 in SOT23-6 package. It operates ratiometrically using the supply voltage as reference and achieves ±0.0125% FSR INL and 4 µVP-P noise for high-accuracy sensor signal digitization in space-constrained industrial sensing nodes.
For engineers reviewing the ADS1100A1IDBVR datasheet, ADS1100A1IDBVR pinout, ADS1100A1IDBVR application, or ADS1100A1IDBVR equivalent, this page delivers verified technical context, validated pin functions, real-world use cases for bridge/thermistor interfaces, and confirmed alternative options with documented functional trade-offs.
Technical Context
The ADS1100A1IDBVR implements a fully differential delta-sigma modulator with integrated digital filter and internal system clock (nominal 275 kHz), eliminating external timing components. Its ratiometric architecture ties full-scale range directly to VDD/PGA, enabling stable measurements without precision voltage references.
It supports two operating modes-continuous conversion and single-shot-with automatic power-down after each conversion in single mode, reducing active current to 90 µA and idle current to 0.05–2 µA. The I²C slave interface accepts Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) modes, with address 1001001 (AD1 variant).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | Up to 16 bits with no missing codes; output code range –32,768 to +32,767 at 8 SPS. |
| INL (Max) | ±0.0125% of FSR at 16-bit mode, PGA = 1 - ensures linearity critical for calibration-critical transmitters. |
| Data Rate | Selectable 8 / 16 / 32 / 128 SPS - enables trade-off between noise floor (4 µVP-P at 8 SPS) and update speed. |
| PGA Gain | Programmable 1×, 2×, 4×, or 8× - extends effective input range down to ±VDD/8 for microvolt-level thermistor or bridge outputs. |
| Supply Range | 2.7 V to 5.5 V - compatible with single-cell Li-ion, 3.3 V logic rails, and legacy 5 V systems without level-shifting. |
| I²C Address | Fixed 7-bit address 1001001 (0x49) - allows coexistence with up to seven other ADS1100 variants on same bus. |
| Operating Temp | –40°C to +85°C - qualified for industrial process control and factory automation environments. |
Pinout & Package
SOT23-6 package (DBV), 2.9 mm × 1.6 mm × 1.15 mm body, gull-wing leads, moisture sensitivity level 1. Pin 1 marked by dot or notch orientation; marking "AD1" confirms I²C address 1001001.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN+ | Differential analog input positive | Non-inverting input node; accepts voltage from 0.2 V below GND to VDD + 0.2 V; impedance = 2.4 MΩ/PGA. |
| VIN− | Differential analog input negative | Inverting input node; same voltage and impedance limits as VIN+; enables true differential measurement rejecting common-mode noise. |
| GND | Analog and digital ground reference | Single ground connection required; must be low-impedance path to minimize offset drift and noise coupling. |
| SCL | I²C clock input | Asynchronous master-generated clock; ADS1100 only receives - no clock stretching or arbitration capability. |
| VDD | Power supply input | Supplies both analog and digital sections; also serves as ratiometric reference - output code ∝ (VIN+ − VIN−)/VDD. |
| SDA | I²C bidirectional data line | Open-drain interface requiring external pull-up; used for reading output register (16-bit) and configuration register (8-bit). |
Key Features
| Feature | Design Value |
|---|---|
| Continuous self-calibration | On-chip offset/gain correction runs automatically during operation - eliminates need for manual calibration routines or external trim components. |
| Differential switched-capacitor input | Input impedance varies with PGA setting (e.g., 2.4 MΩ at PGA=1); enables direct connection to low-output-impedance sensors like strain gauges. |
| Single-cycle conversion | Each conversion completes in one data-rate period (e.g., 125 ms at 8 SPS) - deterministic timing simplifies firmware scheduling. |
| Low-power shutdown | Consumes only 0.05–2 µA in power-down state - suitable for battery-powered portable instrumentation with duty-cycled sampling. |
| Internal system clock | 275 kHz nominal oscillator - removes requirement for external crystal or clock source, reducing BOM count and layout area. |
Applications
| Industrial Process Transmitters | Portable Sensor Data Loggers |
|---|---|
Use Scenario: Digitizing 4–20 mA loop signals conditioned via precision shunt resistors in hazardous-area field transmitters. IC Role / Device Role / Timing Role: ADC front-end converting differential voltage across shunt with 16-bit resolution and <125 ppm INL to support HART protocol compliance. Use Value: Ratiometric operation eliminates reference drift errors; PGA gain selection accommodates varying shunt values without hardware change. |
Use Scenario: Battery-operated handheld multimeter measuring thermocouple, RTD, or bridge sensor outputs over extended periods. IC Role / Device Role / Timing Role: Low-noise, low-power ADC acquiring microvolt-level signals at 8 SPS with automatic power-down between samples. Use Value: 4 µVP-P noise and 90 µA active current enable >100-hour runtime on coin cell; SOT23-6 footprint fits compact handheld form factor. |
| Smart Factory Temperature Nodes | Consumer Health Wearables |
Use Scenario: Distributed temperature monitoring in HVAC ducts or motor windings using NTC thermistors in Wheatstone bridge configuration. IC Role / Device Role / Timing Role: Differential ADC rejecting common-mode EMI from nearby VFDs while resolving <0.1°C steps across –40°C to +125°C range. Use Value: 8 MΩ common-mode input impedance minimizes loading error on high-Z thermistor networks; self-calibration maintains accuracy over thermal cycling. |
Use Scenario: Optical heart-rate sensor analog front-end capturing photodiode current variations in wrist-worn fitness bands. IC Role / Device Role / Timing Role: Precision ADC converting transimpedance amplifier output with programmable gain to handle ambient-light-induced DC offset shifts. Use Value: PGA gain adjustment (1×–8×) compensates for skin-tone-dependent signal amplitude variation without changing external circuitry. |
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 |
|---|---|---|---|
| ADS1115IDGSR | 4-channel, 16-bit, programmable comparator, 860 SPS max, VDD = 2.0–5.5 V, QFN-10 package | Supports multiplexed multi-sensor acquisition; lacks continuous self-calibration - requires periodic offset calibration in firmware. | Choose when expanding from single to four analog inputs without increasing board area significantly. |
| MCP3421A0T-E/CH | 18-bit, 15 SPS max, PGA = 1/2/4/8, VDD = 2.7–5.5 V, SOT23-6, no self-calibration | Higher resolution but lower max data rate; offset/gain errors require external calibration or host compensation. | Choose when ultra-low noise (<1 µVP-P) at slow rates suffices and self-calibration is not mandatory. |
Compared with ADS1100A1IDBVR, ADS1115IDGSR offers channel multiplexing and higher throughput but adds complexity in calibration management, while MCP3421A0T-E/CH trades off speed for enhanced resolution without built-in calibration - making ADS1100A1IDBVR optimal for cost-sensitive, space-constrained designs demanding guaranteed linearity without host intervention.
Availability
ADS1100A1IDBVR is available at Aetrix Electronics and suitable for industrial process transmitters, portable instrumentation, and smart factory sensor nodes requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADS1100A1IDBVR 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 decades of expertise in precision data acquisition ICs.
The ADS1100 product line was designed specifically for ultra-compact, low-power, high-accuracy sensor interfacing in industrial and portable equipment - prioritizing integration, self-calibration, and ease of use over configurability.
FAQ
What is the I²C address of the ADS1100A1IDBVR?
The ADS1100A1IDBVR has a fixed 7-bit I²C address of 1001001 (0x49), corresponding to the AD1 variant per TI's ordering table. This address is factory-programmed and cannot be changed. The device responds to General Call Reset (0x00 followed by 0x06) but does not support address reconfiguration. All communication uses standard I²C read/write protocols with ACK/NACK handling as defined in the SBAS239B datasheet.
Does the ADS1100A1IDBVR require an external reference voltage?
No, the ADS1100A1IDBVR does not require an external reference voltage. It operates ratiometrically using VDD as its reference - the full-scale range equals ±VDD/PGA. This eliminates reference drift and simplifies design, but means output code accuracy depends directly on VDD stability. For best performance, use a well-regulated, low-noise supply with ≤1% ripple, especially when PGA > 1.
How does the programmable gain amplifier (PGA) affect input voltage range in ADS1100A1IDBVR?
In the ADS1100A1IDBVR, the PGA scales the differential input before conversion: full-scale input voltage = ±VDD/PGA. At PGA = 1, input range is ±VDD; at PGA = 8, it shrinks to ±VDD/8. This allows small signals (e.g., 125 mV from a load cell) to use full 16-bit resolution without external amplification. Input voltage limits remain GND – 0.2 V to VDD + 0.2 V regardless of PGA setting.
Can the ADS1100A1IDBVR operate from a 3.3 V supply?
Yes, the ADS1100A1IDBVR operates reliably from 3.3 V. Its specified supply range is 2.7 V to 5.5 V, and all electrical characteristics - including 90 µA supply current, ±0.0125% INL, and 4 µVP-P noise - are guaranteed across this range. At 3.3 V, full-scale range at PGA = 1 is ±3.3 V; at PGA = 8, it is ±412.5 mV. Power dissipation drops to ~210 µW, enhancing thermal performance in dense layouts.
What is the purpose of the ST/BSY bit in the ADS1100A1IDBVR configuration register?
The ST/BSY bit (bit 7) in the ADS1100A1IDBVR configuration register serves dual roles: in single-conversion mode, writing '1' triggers one conversion, then resets to '0'; reading '1' indicates conversion in progress. In continuous mode, ST/BSY is always '1' and ignored on write. This bit provides simple status feedback without polling delay - firmware can wait for ST/BSY = 0 before reading the output register, ensuring valid data capture every time.
ADS1100A1IDBVR 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:
- -
ADS1100A1IDBVR FAQ
1.How can I place an order for ADS1100A1IDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1100A1IDBVR 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 ADS1100A1IDBVR reliable?
The price and inventory of ADS1100A1IDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1100A1IDBVR is usually 5 days.
3.What payment methods are accepted for ADS1100A1IDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1100A1IDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1100A1IDBVR?
ADS1100A1IDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1100A1IDBVR 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 ADS1100A1IDBVR?
For technical support, including ADS1100A1IDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1100A1IDBVR requirements.
6.How does Aetrix verify that ADS1100A1IDBVR is sourced from the original manufacturer or authorized distributors?
All ADS1100A1IDBVR 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 ADS1100A1IDBVR meets industry standards.
7.What is the process for return or replacement of ADS1100A1IDBVR?
All ADS1100A1IDBVR units undergo pre-shipment inspection (PSI). If there is an issue with ADS1100A1IDBVR, 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 ADS1100A1IDBVR part is unused and in its original packaging.
Return procedure for ADS1100A1IDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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