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Texas Instruments ADS1100A7IDBVT
- Part No.:
- ADS1100A7IDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- SOT-23-6
- Datasheet:
-
ADS1100A7IDBVT.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,021
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Product details
Overview
ADS1100A7IDBVT from Texas Instruments is a self-calibrating, 16-bit delta-sigma analog-to-digital converter with differential inputs, I²C interface, programmable gain amplifier (PGA = 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 at 16-bit resolution. It is used in precision low-power sensor signal conditioning for smart transmitters and portable instrumentation.
For engineers reviewing the ADS1100A7IDBVT datasheet, ADS1100A7IDBVT pinout, ADS1100A7IDBVT application, or ADS1100A7IDBVT equivalent, this page delivers verified technical context, exact pin functions, real-world use-value per application, and two validated alternative parts - all grounded in TI's SBAS239B datasheet and ordering documentation.
Technical Context
The ADS1100A7IDBVT 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 after conversion, reducing active current to 90 µA and idle current to 0.05–2 µA). Input impedance is gain-dependent: differential = 2.4 MΩ/PGA, common-mode = 8 MΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | Up to 16 bits with no missing codes; selectable 12/14/15/16-bit output based on DR setting. |
| Data Rate | 8/16/32/128 SPS - determines resolution, noise floor (4 µVP-P typ. at 8 SPS), and effective sampling bandwidth. |
| INL | ±0.0125% of FSR max at 16-bit mode, PGA = 1 - ensures high-accuracy end-point linearity for calibration-critical systems. |
| PGA Gain | Selectable 1, 2, 4, or 8 - enables direct digitization of mV-level sensor outputs (e.g., load cells, RTDs) without external amplification. |
| Supply Range | 2.7 V to 5.5 V - supports single-supply operation across battery-powered (3.3 V) and industrial (5 V) rails. |
| I²C Address | 1001111 (7-bit) - fixed factory-set address for ADS1100A7 variant; enables multi-drop bus with seven other ADS1100 variants. |
| Operating Temp | –40°C to +85°C - qualified for industrial environments including process control and factory automation. |
Pinout & Package
SOT23-6 package (DBV designation), 1.6 mm × 2.9 mm footprint, 1.45 mm height, gull-wing leads. RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN+ | Differential analog input positive | Non-inverting input; accepts voltage up to VDD + 0.2 V; requires source impedance ≤ 10 kΩ for <0.1 LSB error with PGA = 8. |
| 2 - GND | Analog/digital ground reference | Common return for VDD, analog inputs, and I²C logic; must be low-impedance and separated from noisy digital ground if possible. |
| 3 - SCL | I²C serial clock input | Asynchronous master-driven clock (up to 3.4 MHz in Hs mode); open-drain input requiring external pull-up resistor (typically 2.2–10 kΩ). |
| 4 - VIN− | Differential analog input negative | Inverting input; same voltage range as VIN+; differential input voltage must stay within ±VDD/PGA to avoid clipping. |
| 5 - VDD | Power supply | Single 2.7–5.5 V rail powers analog core, digital logic, and internal oscillator; bypass with 0.1 µF ceramic capacitor near pin. |
| 6 - SDA | I²C serial data bidirectional | Open-drain bidirectional 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 | Automatic offset/gain correction during operation - eliminates need for manual calibration cycles or external references in field-deployed systems. |
| Programmable data rate | Four discrete SPS options (8/16/32/128) - allows trade-off between resolution/noise and update rate without firmware changes to ADC core. |
| Low-noise PGA | 4 µVP-P input-referred noise at 8 SPS - enables sub-100 µV measurement capability for thermocouple or strain gauge interfaces. |
| Single-cycle conversion | One-shot conversion completes in fixed time per DR setting - simplifies timing synchronization in microcontroller-based polling architectures. |
| Ratiometric operation | FSR scales with VDD - removes dependency on stable external reference; ideal for battery-powered systems where supply varies. |
Applications
| Portable Instrumentation | Industrial Process Control |
|---|---|
Use Scenario: Handheld multimeter measuring mV-level thermocouple outputs with 0.1°C resolution over –20°C to +85°C ambient. IC Role / Device Role / Timing Role: Precision front-end ADC performing differential ratiometric conversion with PGA = 8 and 8 SPS data rate. Use Value: Eliminates external op-amp and reference IC, reducing BOM count by 3 components while maintaining ±0.0125% FSR INL accuracy. |
Use Scenario: 4–20 mA smart transmitter digitizing bridge sensor output in hazardous-area flow meter. IC Role / Device Role / Timing Role: Low-power, self-calibrating ADC interfacing directly to Wheatstone bridge with common-mode rejection >94 dB at PGA = 8. Use Value: Enables true 16-bit resolution at 8 SPS with <2 µA standby current - extends loop-powered device battery life beyond 10 years. |
| Smart Transmitters | Temperature Measurement Systems |
Use Scenario: DIN-rail mounted pressure transmitter with HART communication, requiring stable ADC performance across –40°C to +85°C. IC Role / Device Role / Timing Role: Primary A/D converter in isolated analog front-end, configured for continuous 16 SPS mode with PGA = 4. Use Value: Continuous self-calibration maintains INL ≤ ±0.0125% FSR over full temperature range - avoids recalibration during field deployment. |
Use Scenario: Wireless sensor node monitoring NTC thermistor in HVAC duct, powered by coin-cell battery. IC Role / Device Role / Timing Role: Ultra-low-power ADC operating in single-conversion mode, triggered only on wake-up interrupt. Use Value: Reduces average current to <1 µA (90 µA active × 0.01% duty cycle) - enables 5-year operation on CR2032 cell. |
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 | Supports multiplexed sensor arrays; lacks ratiometric reference but adds alert pin and internal reference option | Choose ADS1115IRUGT when multi-channel scanning or internal 2.048 V reference is required; not drop-in due to different pinout and I²C address map. |
| MCP3424-E/SL | 4-channel, 18-bit, PGA = 1/2/4/8, 15 SPS max, SOIC-14 package, no self-calibration | Higher resolution but slower; requires external calibration or periodic offset nulling in production | Choose MCP3424-E/SL when 18-bit resolution outweighs self-calibration benefit and board space permits larger SOIC package. |
Compared with ADS1100A7IDBVT, ADS1115IRUGT offers higher throughput and channel count but sacrifices ratiometric simplicity and ultra-small footprint; MCP3424-E/SL provides greater resolution but demands external calibration infrastructure and occupies 2.3× more PCB area.
Availability
ADS1100A7IDBVT is available at Aetrix Electronics and suitable for portable instrumentation, industrial process control, and smart transmitters requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADS1100A7IDBVT 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 and industrial-grade IC design.
The ADS1100 product line was designed specifically for space-constrained, low-power, high-accuracy sensor signal conditioning - targeting applications where self-calibration, small SOT23-6 packaging, and I²C simplicity reduce system complexity and cost.
FAQ
What is the I²C address of the ADS1100A7IDBVT?
The ADS1100A7IDBVT has a fixed 7-bit I²C slave address of 1001111 (0x4F in hexadecimal), corresponding to the "A7" variant in the ADS1100 family. This address is factory-programmed and cannot be changed. The device responds to General Call Reset (0x00 followed by 0x06) but does not acknowledge other General Call data bytes.
Does the ADS1100A7IDBVT require an external reference voltage?
No, the ADS1100A7IDBVT uses a ratiometric architecture where the power supply (VDD) serves as the reference voltage. Full-scale range equals ±VDD/PGA, so accuracy tracks supply variations - eliminating need for external voltage reference and simplifying layout in battery- or rail-powered systems.
How does the programmable gain amplifier (PGA) affect input range in the ADS1100A7IDBVT?
In the ADS1100A7IDBVT, PGA gain settings of 1, 2, 4, or 8 scale the full-scale input range inversely: FSR = ±VDD/PGA. At VDD = 5 V and PGA = 8, the usable differential input range is ±0.625 V; at PGA = 1, it is ±5 V. This allows direct digitization of low-level sensor signals without external amplification.
What is the maximum achievable resolution and data rate combination for the ADS1100A7IDBVT?
The ADS1100A7IDBVT achieves 16-bit resolution only at the 8 SPS data rate (DR = 11). Higher data rates reduce resolution: 16 SPS = 15 bits, 32 SPS = 14 bits, and 128 SPS = 12 bits - as defined in Table I of the SBAS239B datasheet. All modes guarantee no missing codes across their respective bit widths.
Can the ADS1100A7IDBVT operate from a 3.3 V supply?
Yes, the ADS1100A7IDBVT is fully specified for operation from 2.7 V to 5.5 V, including standard 3.3 V logic rails. At 3.3 V, typical supply current remains 90 µA in active mode, and full-scale range adjusts ratiometrically (e.g., ±3.3 V at PGA = 1, ±0.4125 V at PGA = 8), maintaining accuracy without recalibration.
ADS1100A7IDBVT 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:
- -
ADS1100A7IDBVT FAQ
1.How can I place an order for ADS1100A7IDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1100A7IDBVT 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 ADS1100A7IDBVT reliable?
The price and inventory of ADS1100A7IDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1100A7IDBVT is usually 5 days.
3.What payment methods are accepted for ADS1100A7IDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1100A7IDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1100A7IDBVT?
ADS1100A7IDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1100A7IDBVT 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 ADS1100A7IDBVT?
For technical support, including ADS1100A7IDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1100A7IDBVT requirements.
6.How does Aetrix verify that ADS1100A7IDBVT is sourced from the original manufacturer or authorized distributors?
All ADS1100A7IDBVT 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 ADS1100A7IDBVT meets industry standards.
7.What is the process for return or replacement of ADS1100A7IDBVT?
All ADS1100A7IDBVT units undergo pre-shipment inspection (PSI). If there is an issue with ADS1100A7IDBVT, 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 ADS1100A7IDBVT part is unused and in its original packaging.
Return procedure for ADS1100A7IDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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