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Texas Instruments ADS7822EB/2K5G4
- Part No.:
- ADS7822EB/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ADS7822EB/2K5G4.pdf
- Description:
- IC ADC 12BIT SAR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,678
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Product details
Overview
ADS7822EB/2K5G4 from Texas Instruments is a 12-bit, 200kHz pseudo-differential SAR analog-to-digital converter with ±1 LSB integral linearity error, 1.6mW power consumption at full rate (VCC = 5V), and MSOP-8 package. It features a synchronous 3-wire serial interface (CS/SHDN, DCLOCK, DOUT), operates from 2.7V to 5.25V, and supports external reference voltages from 50mV to VCC - ideal for battery-powered remote sensing nodes requiring high resolution and ultra-low quiescent current.
For engineers reviewing the ADS7822EB/2K5G4 datasheet, ADS7822EB/2K5G4 pinout, ADS7822EB/2K5G4 application, or ADS7822EB/2K5G4 equivalent, key selection criteria include guaranteed ±1 LSB INL/DNL over –40°C to +85°C, micro-power operation down to 3μA in shutdown, pseudo-differential input architecture with independent –In ground-sense capability, and compatibility with 3V/5V logic systems via CMOS-level I/O.
Technical Context
The ADS7822EB/2K5G4 implements a capacitive redistribution successive approximation register (SAR) architecture on a 0.6μm CMOS process, integrating sample-and-hold functionality. Its conversion cycle requires exactly 12 clock cycles after acquisition, with 1.5 clock cycles dedicated to analog sampling - enabling deterministic timing control and minimal latency.
It uses a synchronous 3-wire serial interface where CS/SHDN initiates conversion and controls power-down state, DCLOCK synchronizes bit transfer on falling edges, and DOUT outputs straight-binary data MSB-first. The pseudo-differential input accepts voltage differences between +In and –In, with –In limited to –0.2V to +1.0V and +In spanning GND–0.2V to VCC+0.2V - supporting remote ground sensing but not true differential rejection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit SAR with no missing codes guaranteed - delivers 4096 discrete output levels for precise analog measurement. |
| Sampling Rate | 200kHz maximum throughput at VCC = 5V - supports real-time monitoring of fast transients in sensor interfaces. |
| INL / DNL | ±1 LSB integral and differential linearity error - ensures monotonicity and <0.024% full-scale accuracy without calibration. |
| Power Consumption | 1.6mW at 200kHz (VCC = 5V); 0.54mW at 75kHz - enables multi-year battery life in low-duty-cycle data loggers. |
| Supply Range | 2.7V to 5.25V operation with 3μA max shutdown current - compatible with single-cell Li-ion, dual-cell alkaline, or regulated 3.3V/5V rails. |
| Reference Range | 50mV to VCC programmable external reference - allows flexible scaling from millivolt-level thermocouple signals to full-rail inputs. |
| Interface | Synchronous 3-wire serial (CS/SHDN, DCLOCK, DOUT) - eliminates protocol overhead and simplifies MCU GPIO usage. |
Pinout & Package
ADS7822EB/2K5G4 is supplied in an MSOP-8 package (DGK marking, 3.0mm × 3.0mm body, 0.65mm pitch), optimized for space-constrained PCB layouts in portable instrumentation and IoT edge nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VREF | Reference voltage input | Accepts external reference from 50mV to VCC; sets full-scale span and LSB weight (e.g., 1.22mV/LSB at 5V ref). |
| 2 - +In | Noninverting analog input | Primary signal input; valid range GND–0.2V to VCC+0.2V - must be driven by low-impedance source (<1kΩ) for 12-bit settling. |
| 3 - –In | Inverting analog input | Remote ground sense point; limited to –0.2V to +1.0V - enables rejection of local ground bounce in isolated systems. |
| 4 - GND | Analog/digital ground | Single ground pin shared for analog and digital sections; requires low-inductance connection to system ground plane. |
| 5 - CS/SHDN | Chip select / shutdown control | Active-low conversion trigger; high state forces full power-down (3μA), eliminating dynamic power during idle periods. |
| 6 - DOUT | Serial data output | CMOS-level output (0V to VCC); drives MSB-first straight-binary data synchronized to DCLOCK falling edge. |
| 7 - DCLOCK | Data clock input | Asynchronous clock input (10kHz–3.2MHz); falling edge clocks each bit - supports variable-rate sampling without reconfiguration. |
| 8 - +VCC | Power supply | Single 2.7V–5.25V supply powers analog core, digital interface, and internal bias circuits - no separate AVDD/DVDD required. |
Key Features
| Feature | Design Value |
|---|---|
| Pseudo-differential input architecture | Enables remote ground sensing via –In pin while maintaining 12-bit linearity - critical for accurate measurements in noisy or isolated subsystems. |
| Micro-power operation with shutdown mode | Reduces average current to <60μW at 7.5kHz sampling - extends battery life in wireless sensor nodes without sacrificing resolution. |
| Programmable reference input (50mV–VCC) | Allows direct interfacing with low-level sensors (e.g., RTDs, strain gauges) without external gain stages - minimizes component count and noise sources. |
| Synchronous 3-wire serial interface | Eliminates need for SPI peripheral or complex timing logic - reduces MCU resource usage and firmware complexity in embedded designs. |
| Guaranteed ±1 LSB linearity over temperature | Ensures consistent measurement accuracy across –40°C to +85°C industrial environments without software correction or calibration tables. |
Applications
| Battery-Powered Remote Sensors | Isolated Industrial Data Acquisition |
|---|---|
|
Use Scenario: Wireless temperature/humidity node powered by CR2032 coin cell, transmitting readings every 10 seconds. IC Role / Device Role / Timing Role: ADC front-end converting conditioned sensor outputs to 12-bit digital values; triggered by MCU on demand with CS/SHDN. Use Value: 3μA shutdown current and 0.06mW active power at 7.5kHz enable >5-year battery life while preserving measurement fidelity. |
Use Scenario: DIN-rail mounted PLC module measuring 4–20mA loop signals across galvanically isolated channels. IC Role / Device Role / Timing Role: Isolated-side ADC digitizing field sensor inputs; –In connected to isolated ground reference to reject common-mode noise. Use Value: Pseudo-differential input with ±1 LSB linearity maintains <0.025% reading accuracy despite ground potential shifts up to 1V. |
| Portable Medical Instrumentation | Multi-Channel Simultaneous Sampling Systems |
|
Use Scenario: Handheld ECG monitor acquiring lead-II voltage with low-noise analog front-end and Bluetooth LE transmission. IC Role / Device Role / Timing Role: High-fidelity signal digitizer operating from single 3.3V LDO; VREF set to 2.5V for optimal SNR. Use Value: 71dB SINAD and 86dB SFDR at 1kHz support clinical-grade waveform analysis without oversampling or filtering overhead. |
Use Scenario: Motor drive controller sampling phase currents and bus voltage concurrently using multiple ADS7822EB/2K5G4 units. IC Role / Device Role / Timing Role: Synchronized ADC per channel; CS lines daisy-chained to ensure simultaneous sampling initiation. Use Value: Deterministic 12-clock-cycle conversion time and 1.5-cycle acquisition enable sub-50ns inter-channel skew for accurate vector control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U/2K5 | SO-8 package (D marking), ±2 LSB INL/DNL grade - higher linearity tolerance than ADS7822EB/2K5G4's ±1 LSB. | Preferred where board space permits larger SO-8 and cost sensitivity outweighs need for tightest linearity. | Select when footprint flexibility exists and ±2 LSB accuracy suffices for cost-optimized industrial monitoring. |
| ADS7822EC/2K5 | Same MSOP-8 package (DGK), ±0.75 LSB INL/DNL grade - tighter linearity than ADS7822EB/2K5G4's ±1 LSB. | Required for metrology-grade applications demanding <0.018% full-scale error without calibration. | Choose when highest precision is mandatory and budget allows premium grade; verify reference stability requirements. |
Compared with ADS7822U/2K5 and ADS7822EC/2K5, the ADS7822EB/2K5G4 strikes a balanced trade-off between precision (±1 LSB), compactness (MSOP-8), and cost - making it optimal for space-constrained, battery-powered systems needing verified industrial-grade linearity without over-specifying.
Availability
ADS7822EB/2K5G4 is available at Aetrix Electronics and suitable for battery-operated systems, remote data acquisition modules, and isolated industrial sensors requiring stable component supply across extended production lifecycles.
Supply support for ADS7822EB/2K5G4 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 and embedded processing technologies, with decades of expertise in precision data converters and low-power design.
The ADS7822EB/2K5G4 belongs to TI's legacy precision SAR ADC family, engineered specifically for ultra-low-power, high-resolution measurement in portable and isolated instrumentation - emphasizing micro-power efficiency, small footprint, and robust performance across industrial temperature ranges.
FAQ
What is the guaranteed integral linearity error for ADS7822EB/2K5G4 over its full operating temperature range?
The ADS7822EB/2K5G4 guarantees ±1 LSB integral linearity error (INL) across –40°C to +85°C, as confirmed in the Electrical Characteristics table for the "ADS7822EB" grade under both +2.7V and +5V supply conditions. This specification ensures monotonic behavior and predictable full-scale accuracy without requiring end-system calibration.
Does ADS7822EB/2K5G4 support true differential input operation?
No, the ADS7822EB/2K5G4 implements a pseudo-differential input architecture: it samples the voltage difference between +In and –In, but the –In pin is restricted to –0.2V to +1.0V and cannot swing rail-to-rail. It is intended for remote ground sensing-not full differential signal rejection-and does not support symmetrical ±VREF input ranges.
How does the power consumption of ADS7822EB/2K5G4 scale with sampling rate?
ADS7822EB/2K5G4 power scales linearly with sample rate: 1.6mW at 200kHz (VCC = 5V), 0.54mW at 75kHz, and 0.06mW at 7.5kHz. In shutdown (CS = VCC), current drops to ≤3μA regardless of clock activity - enabling aggressive duty-cycling strategies to minimize average power in intermittent-sampling applications.
Can ADS7822EB/2K5G4 operate from a 3.3V supply while interfacing with 5V logic systems?
Yes, ADS7822EB/2K5G4 supports 2.7V to 5.25V operation and accepts digital input levels up to 6V independent of VCC. When powered at 3.3V, its DOUT output swings 0V to 3.3V, which is compatible with 5V-tolerant CMOS inputs; however, level-shifting may be needed for reliable recognition by strict 5V logic thresholds.
What is the minimum clock frequency required for reliable operation of ADS7822EB/2K5G4?
The ADS7822EB/2K5G4 requires a minimum DCLOCK frequency determined by internal capacitor leakage: at VCC = 2.7V–3.6V, minimum high/low times are 400ns (≥1.25MHz); at VCC = 4.75V–5.25V, minimum times are 125ns (≥4MHz). For 200kHz throughput, fCLK must be ≥3.2MHz (16× sample rate); lower rates require proportionally slower clocks.
ADS7822EB/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- 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):
- 200k
- Number of Inputs:
- 1
- Input Type:
- Pseudo-Differential
- Data Interface:
- SPI
- 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:
- -
ADS7822EB/2K5G4 FAQ
1.How can I place an order for ADS7822EB/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS7822EB/2K5G4 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 ADS7822EB/2K5G4 reliable?
The price and inventory of ADS7822EB/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS7822EB/2K5G4 is usually 5 days.
3.What payment methods are accepted for ADS7822EB/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS7822EB/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS7822EB/2K5G4?
ADS7822EB/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS7822EB/2K5G4 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 ADS7822EB/2K5G4?
For technical support, including ADS7822EB/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS7822EB/2K5G4 requirements.
6.How does Aetrix verify that ADS7822EB/2K5G4 is sourced from the original manufacturer or authorized distributors?
All ADS7822EB/2K5G4 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 ADS7822EB/2K5G4 meets industry standards.
7.What is the process for return or replacement of ADS7822EB/2K5G4?
All ADS7822EB/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS7822EB/2K5G4, 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 ADS7822EB/2K5G4 part is unused and in its original packaging.
Return procedure for ADS7822EB/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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