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Texas Instruments ADS7823EB/250G4
- Part No.:
- ADS7823EB/250G4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS7823EB/250G4.pdf
- Description:
- IC ADC 12BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,659
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Product details
Overview
ADS7823EB/250G4 from Texas Instruments is a 12-bit SAR analog-to-digital converter with I²C interface, ±0.5 LSB integral linearity error, 50 kHz sampling rate in High-Speed I²C mode, and MSOP-8 package. It operates from 2.7 V to 5 V, supports Standard/Fast/High-Speed I²C modes, and features a 4-word FILO buffer for remote data acquisition.
For engineers reviewing the ADS7823EB/250G4 datasheet, ADS7823EB/250G4 pinout, ADS7823EB/250G4 application, or ADS7823EB/250G4 equivalent, key selection considerations include its I²C-compatible low-power operation (60 µA powerdown), ±0.5 LSB INL at –40°C to +85°C, external reference flexibility (0.05 V to VDD), and MSOP-8 footprint suitability for space-constrained isolated sensor nodes.
Technical Context
The ADS7823EB/250G4 implements a capacitive redistribution SAR architecture with integrated sample-and-hold, internally generated asynchronous clock, and automatic power gating-core disabled between conversions to minimize quiescent current. Its I²C slave logic decodes hardware address 10010xx (A1/A0 configurable) and supports R/W-directed command byte (000xxxxx) initiation.
Conversion timing is mode-dependent: in High-Speed I²C (3.4 MHz), it achieves 50 kHz throughput with SCL stretching; in Fast Mode (400 kHz), throughput drops to 8 kHz with full 4-word FILO buffering; Standard Mode (100 kHz) yields 2 kHz. Data is output as two 8-bit bytes (MSB first), with no missing codes guaranteed across the full 12-bit range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR - delivers 4096 discrete output levels with monotonic transfer function and no missing codes. |
| Integral Linearity Error | ±0.5 LSB max (ADS7823EB grade) - ensures <0.012% full-scale accuracy critical for precision voltage monitoring. |
| Sampling Rate | 50 kHz in High-Speed I²C mode - enables real-time capture of signals up to ~24 kHz (Nyquist-limited). |
| Supply Voltage Range | 2.7 V to 5.0 V - supports direct interfacing with 3.3 V and 5 V microcontrollers without level-shifting. |
| I²C Compatibility | Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) modes - allows flexible bus speed selection based on system noise and timing budget. |
| Reference Input Range | 0.05 V to VDD - permits use of internal LDO outputs, battery taps, or precision references down to 50 mV. |
| Power Consumption | 60 µA in powerdown (full shutdown), 250–370 µA typical in High-Speed I²C mode - enables multi-year battery life in remote sensing nodes. |
Pinout & Package
ADS7823EB/250G4 is housed in an MSOP-8 (DGK) package: 3.0 mm × 3.0 mm, 0.65 mm pitch, exposed pad optional, RoHS-compliant. Thermal resistance θJA = 240°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF | External reference input | Defines full-scale analog input range (0 to VREF); accepts 50 mV–VDD; high-impedance (1 GΩ) minimizes loading. |
| AIN | Analog input | Single-ended input with 25 pF sampling capacitance; requires source capable of charging cap within conversion period. |
| A0, A1 | I²C slave address bits | Set LSBs of 7-bit address (10010xx); allow up to four ADS7823EB devices on same I²C bus without conflict. |
| GND | Analog ground | Must connect to clean analog ground plane; separate from digital ground to avoid noise coupling into SAR decision cycle. |
| +VDD | Power supply | Single 2.7–5.0 V rail powers analog core, digital interface, and internal clock generator. |
| SDA | I²C bidirectional data line | Open-drain CMOS; requires external pull-up; supports all three I²C speeds with defined rise/fall time limits. |
| SCL | I²C clock input | Open-drain CMOS; master-generated; timing parameters vary by mode (e.g., tHIGH = 60 ns min in HS mode). |
Key Features
| Feature | Design Value |
|---|---|
| Four-word FILO buffer | Stores up to four 12-bit conversions locally-eliminates I²C bus contention during burst sampling in Fast/Standard modes. |
| Hardware-configurable I²C address | A0/A1 pins set device address (10010xx), enabling multi-drop topology with up to four identical ADS7823EB/250G4 on one bus. |
| Three-speed I²C support | Native compatibility with Standard (100 kHz), Fast (400 kHz), and High-Speed (3.4 MHz) protocols-no external glue logic required. |
| Asynchronous internal clock | Eliminates need for external timing components; clock automatically gates off when idle, reducing dynamic power. |
| Low-power powerdown modes | Full shutdown draws only 2–3 nA (SCL/SDA pulled high); partial powerdown draws 5.4–346 µA depending on I²C mode and address match. |
Applications
| Voltage Supply Monitoring | Isolated Data Acquisition |
|---|---|
Use Scenario: Real-time tracking of 3.3 V and 5 V rails in industrial PLC backplanes with galvanic isolation. IC Role / Device Role / Timing Role: ADC front-end digitizing analog feedback from isolated DC-DC converters via optocoupled or transformer-coupled signal paths. Use Value: ±0.5 LSB INL ensures <±3 mV absolute error at 3.3 V full scale; I²C interface simplifies isolation boundary crossing using digital isolators (e.g., ISO1540). |
Use Scenario: Sensor node deployed in high-noise motor drive cabinets, measuring temperature or current with >3 kV isolation. IC Role / Device Role / Timing Role: Local SAR ADC acquiring analog signals near source, then transmitting digitized values over isolated I²C bus to host MCU. Use Value: MSOP-8 size and 250 µA active current enable placement directly at sensor; 4-word FILO buffers data during isolation propagation delay. |
| Transducer Interface | Battery-Operated Systems |
Use Scenario: Signal conditioning for strain-gauge bridges or RTDs in portable test equipment with 2-wire analog front-end. IC Role / Device Role / Timing Role: Precision digitizer accepting low-level mV-range outputs, referenced to stable external 2.5 V source. Use Value: 33 µVRMS noise and 82 dB PSRR suppress supply ripple; 0.05 V minimum VREF allows direct use of low-dropout regulator outputs. |
Use Scenario: Long-life environmental monitor powered by coin cell (CR2032), logging voltage, temperature, and humidity every 10 seconds. IC Role / Device Role / Timing Role: Low-quiescent ADC activated on-demand via microcontroller I²C wake, then returning to 3 nA shutdown. Use Value: 2–3 nA full powerdown current extends CR2032 lifetime beyond 10 years; I²C eliminates need for dedicated SPI lines, saving PCB area and GPIO. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit I²C ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP3221-E/P | 12-bit SAR, single-ended, I²C, but fixed address (1001010), no A0/A1 pins; ±1 LSB INL (worse than ADS7823EB's ±0.5 LSB); 188 kSPS max (but only in SPI-like pseudo-I²C burst mode). | Lacks hardware address configuration-limits multi-device bus scalability; higher INL reduces precision in supply monitoring. | Select MCP3221-E/P only when board space is tighter (PDIP-8 vs MSOP-8) and address flexibility is unnecessary. |
| ADS7822E/250 | 12-bit SAR, same MSOP-8 package and pinout, but I²C-only variant of ADS7822 (which also offers SPI); ±1 LSB INL (ADS7822E grade), 50 kHz sampling, 2.7–5.25 V supply. | Functionally nearly identical but lacks the enhanced linearity of ADS7823EB grade; shares same timing, buffer, and interface behavior. | ADS7822E/250 is a cost-optimized drop-in alternative where ±1 LSB INL is acceptable-no layout change required. |
Compared with MCP3221-E/P and ADS7822E/250, ADS7823EB/250G4 provides superior DC accuracy (±0.5 LSB INL), configurable addressing for multi-drop systems, and verified 50 kHz throughput in true High-Speed I²C mode-making it optimal for precision, scalable, and noise-sensitive remote sensing.
Availability
ADS7823EB/250G4 is available at Aetrix Electronics and suitable for voltage supply monitoring, isolated data acquisition, transducer interface, battery-operated systems, and remote data acquisition requiring stable component supply and long-term industrial availability.
Supply support for ADS7823EB/250G4 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 converters and industrial-grade IC design.
The ADS7823EB/250G4 belongs to TI's precision SAR ADC product line, engineered for low-power, I²C-enabled signal acquisition in space-constrained, isolated, or battery-powered systems where accuracy and bus simplicity are critical.
FAQ
What is the maximum I²C clock frequency supported by ADS7823EB/250G4?
The ADS7823EB/250G4 supports High-Speed I²C mode up to 3.4 MHz (with 100 pF bus load) or 1.7 MHz (with 400 pF bus load), Fast Mode at 400 kHz, and Standard Mode at 100 kHz. Timing parameters-including tHIGH, tLOW, and tSU;DAT-are strictly defined per mode in the datasheet to ensure reliable communication without arbitration loss.
Does ADS7823EB/250G4 require an external clock source?
No, ADS7823EB/250G4 does not require an external clock. It uses an internally generated asynchronous clock for SAR conversion, which automatically powers down when idle. The only external timing signal needed is the I²C SCL clock from the master device-no crystal, oscillator, or timing resistor is required.
How many ADS7823EB/250G4 devices can share the same I²C bus?
Up to four ADS7823EB/250G4 devices can coexist on a single I²C bus, enabled by the A0 and A1 address-select pins. These pins configure the two LSBs of the 7-bit slave address (10010xx), yielding addresses 0x48–0x4B. Each device must have unique A0/A1 combinations at power-up to avoid bus collisions.
What is the purpose of the 4-word FILO buffer in ADS7823EB/250G4?
The 4-word FILO (First-In Last-Out) buffer in ADS7823EB/250G4 stores up to four completed 12-bit conversions while awaiting I²C readout. This decouples sampling from bus traffic-especially valuable in Fast and Standard I²C modes where readout is slower than conversion-and prevents data loss during bus arbitration or host latency.
Can ADS7823EB/250G4 operate with a 2.5 V reference and 3.3 V supply simultaneously?
Yes, ADS7823EB/250G4 supports mixed-supply operation: VREF may be set to 2.5 V (e.g., from a precision reference IC) while +VDD is 3.3 V. The reference input accepts 0.05 V to VDD, and the analog input range becomes 0 to 2.5 V-enabling high-resolution measurement of sub-3.3 V signals without attenuation or gain stages.
ADS7823EB/250G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 50k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- I2C
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V, 5V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V, 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-VSSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS7823EB/250G4 FAQ
1.How can I place an order for ADS7823EB/250G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7823EB/250G4 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 ADS7823EB/250G4 reliable?
The price and inventory of ADS7823EB/250G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7823EB/250G4 is usually 5 days.
3.What payment methods are accepted for ADS7823EB/250G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7823EB/250G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7823EB/250G4?
ADS7823EB/250G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7823EB/250G4 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 ADS7823EB/250G4?
For technical support, including ADS7823EB/250G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7823EB/250G4 requirements.
6.How does Aetrix verify that ADS7823EB/250G4 is sourced from the original manufacturer or authorized distributors?
All ADS7823EB/250G4 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 ADS7823EB/250G4 meets industry standards.
7.What is the process for return or replacement of ADS7823EB/250G4?
All ADS7823EB/250G4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7823EB/250G4, 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 ADS7823EB/250G4 part is unused and in its original packaging.
Return procedure for ADS7823EB/250G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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