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ADS7822EB/250
Texas Instruments
IC ADC 12BIT SAR 8VSSOP
2009 Pcs New Original In Stock
12 Bit Analog to Digital Converter 1 Input 1 SAR 8-VSSOP
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ADS7822EB/250
Product Overview
1230232
DiGi Electronics Part Number
ADS7822EB/250-DGManufacturer
Texas Instruments
ADS7822EB/250
Description
IC ADC 12BIT SAR 8VSSOPInventory
2009 Pcs New Original In Stock
12 Bit Analog to Digital Converter 1 Input 1 SAR 8-VSSOP
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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ADS7822EB/250 Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
Tape & Reel (TR)
Series
microPOWER™
Product Status
Active
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
Package / Case
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package
8-VSSOP
Mounting Type
Surface Mount
Base Product Number
ADS7822
Datasheet & Documents
Manufacturer Product Page
ADS7822EB/250 Specifications
HTML Datasheet
ADS7822EB/250-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
2 (1 Year)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
ADS7822EB/250-DG
ADS7822EBTR-NDR
-ADS7822EB/250G4-NDR
ADS7822EBDKR
-ADS7822EBCT-DG
ADS7822EB250
ADS7822EBCT
-ADS7822EB/250-NDR
-ADS7822EB/250G4
ADS7822EBCT-NDR
ADS7822EBTR
-ADS7822EBCT
-ADS7822EBCT-NDR
Standard Package
250
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Their response to post-purchase issues was quick and effective.
Dec 02, 2025
Their delivery system is precise, ensuring my orders arrive without issues.
Dec 02, 2025
The checkout is very streamlined, with clear steps and minimal distractions.
Dec 02, 2025
Their customer care team provides timely assistance whenever I need it.
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Frequently Asked Questions (FAQ)
Can the ADS7822EB/250 be safely used in a 5V-only system without risking damage or degraded accuracy, and what external components are critical to ensure reliable operation?
Yes, the ADS7822EB/250 can operate reliably in a 5V-only system since both its analog and digital supply pins (VCC and DGND/AGND) support 5V operation. However, because it uses an external reference voltage (VREF), you must ensure that VREF does not exceed VCC + 0.3V to avoid violating absolute maximum ratings. For optimal accuracy, use a low-noise, precision voltage reference such as the REF5025 (2.5V) or REF3033 (3.3V), and place a 1µF ceramic capacitor close to the VREF pin. Additionally, maintain strict separation between analog and digital grounds near the IC and connect them at a single point to minimize noise coupling—critical for preserving 12-bit performance in 5V environments.
What are the key risks when replacing the ADS7822EB/250 with the ADS7823 or ADS7830 in an existing design, and how can signal integrity be preserved during the swap?
Replacing the ADS7822EB/250 with the ADS7823 (12-bit) or ADS7830 (8-bit) introduces significant risks: the ADS7823 has a slower throughput (100kSPS vs. 200kSPS) and different timing requirements, while the ADS7830 reduces resolution, potentially degrading system SNR. Both use SPI, but the ADS7830 lacks a dedicated conversion start signal, relying on CS timing, which may complicate synchronization in multi-device systems. To preserve signal integrity, verify timing compatibility in your microcontroller’s SPI configuration, ensure the reference voltage remains stable under load, and revalidate full-scale accuracy across temperature. Always re-characterize end-to-end system error after substitution—especially if the original design relied on the ADS7822EB/250’s microPOWER™ efficiency for low-duty-cycle sampling.
How does the pseudo-differential input architecture of the ADS7822EB/250 affect noise rejection in industrial sensor applications, and what layout practices mitigate common-mode interference?
The ADS7822EB/250’s pseudo-differential input provides limited common-mode rejection compared to true differential ADCs, making it susceptible to ground bounce and EMI in industrial environments where sensor returns may float relative to the ADC ground. This can manifest as offset errors or nonlinearities when measuring small signals (e.g., thermocouples or strain gauges). To mitigate this, route the IN− (negative input) trace as a guarded differential pair with IN+, tie IN− to a clean analog ground near the sensor, and avoid running digital lines parallel to analog inputs. Use a star-ground topology and consider adding a small RC filter (e.g., 100Ω + 100pF) at the input to suppress high-frequency noise without significantly affecting settling time—critical for maintaining 12-bit accuracy at 200kSPS.
Is the ADS7822EB/250 suitable for battery-powered IoT edge devices requiring periodic sampling, and how does its power-down mode impact long-term reliability and wake-up timing?
The ADS7822EB/250 is well-suited for battery-powered IoT applications due to its microPOWER™ architecture, drawing only 350µA during conversion and <1µA in power-down mode. However, frequent wake-ups from power-down introduce a critical trade-off: the internal circuitry requires ~2µs to stabilize after wake-up, so sampling intervals shorter than 10µs may yield inaccurate results. To maximize battery life without sacrificing data integrity, implement a burst sampling strategy—wake the device, perform multiple conversions in quick succession, then return to shutdown. Avoid using the power-down mode if sampling faster than every 50µs. Also, ensure the external reference remains powered or account for its startup time; using a low-quiescent-current reference like the TLVH431 can further extend system runtime.
What reliability concerns arise when operating the ADS7822EB/250 at its full -40°C to 85°C temperature range in automotive or outdoor enclosures, and how can drift and long-term stability be managed?
Operating the ADS7822EB/250 across its full temperature range introduces gain and offset drift that can exceed 5 LSBs without calibration, especially near the extremes. While the IC itself is rated for -40°C to 85°C, real-world reliability depends heavily on PCB material, thermal cycling, and reference stability. In automotive or outdoor applications, temperature swings can cause mechanical stress on the 8-VSSOP package, potentially leading to solder joint fatigue over time. To mitigate this, use a thermally stable substrate (e.g., FR4 with high Tg), avoid placing the ADC near heat sources, and select a low-drift external reference such as the MAX6126 (±0.5ppm/°C). Perform system-level gain and offset calibration at temperature extremes during production, and consider periodic background calibration in firmware if measurement accuracy is critical—this compensates for long-term drift and ensures consistent 12-bit performance over the product’s lifetime.
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ADS7822EB/250 CAD Models
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