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ADS7959QDBTRQ1
Texas Instruments
IC ADC 8BIT SAR 30TSSOP
2698 Pcs New Original In Stock
8 Bit Analog to Digital Converter 8 Input 1 SAR 30-TSSOP
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5.0 / 5.0
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ADS7959QDBTRQ1
Product Overview
1240409
DiGi Electronics Part Number
ADS7959QDBTRQ1-DGManufacturer
Texas Instruments
ADS7959QDBTRQ1
Description
IC ADC 8BIT SAR 30TSSOPInventory
2698 Pcs New Original In Stock
8 Bit Analog to Digital Converter 8 Input 1 SAR 30-TSSOP
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
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ADS7959QDBTRQ1 Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
Number of Bits
8
Sampling Rate (Per Second)
1M
Number of Inputs
8
Input Type
Single Ended
Data Interface
SPI
Configuration
MUX-PGA-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 ~ 5.25V
Voltage - Supply, Digital
1.7V ~ 5.25V
Features
PGA
Operating Temperature
-40°C ~ 125°C
Package / Case
30-TFSOP (0.173", 4.40mm Width)
Supplier Device Package
30-TSSOP
Mounting Type
Surface Mount
Grade
Automotive
Qualification
AEC-Q100
Base Product Number
ADS7959
Datasheet & Documents
Manufacturer Product Page
ADS7959QDBTRQ1 Specifications
HTML Datasheet
ADS7959QDBTRQ1-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
296-39868-2
296-39868-1
2156-ADS7959QDBTRQ1
296-39868-6
ADS7959QDBTRQ1-DG
-296-39868-1-DG
TEXTISADS7959QDBTRQ1
Standard Package
2,000
Reviews
5.0/5.0-(Show up to 5 Ratings)
грудня 02, 2025
Der Versandprozess lief reibungslos und extrem schnell, so macht einkaufen Spaß.
грудня 02, 2025
Speedy dispatch and lower prices make them my preferred electronics supplier.
грудня 02, 2025
DiGi offers the best blend of affordability and exemplary customer support.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when integrating the ADS7959QDBTRQ1 in an automotive sensor interface with variable input signal levels?
When integrating the ADS7959QDBTRQ1 in automotive sensor applications, the primary risk lies in managing input signals that exceed the ADC's input voltage range due to its external reference requirement. Since the ADS7959QDBTRQ1 uses an external reference, fluctuations in the reference voltage directly impact conversion accuracy. Designers must ensure stable, low-noise reference voltage sources (e.g., REF50xx or REF30xx series) and account for signal conditioning mismatch when interfacing sensors with varying output spans. Additionally, improper routing of analog inputs in high-noise engine compartment environments can degrade SNR; using shielded traces and local decoupling (100nF ceramic + 1μF) near the AVDD pin is critical for reliable performance across the -40°C to 125°C range.
How does the ADS7959QDBTRQ1 compare to the MAX11603 in terms of drop-in replacement suitability for legacy industrial control designs?
While both the ADS7959QDBTRQ1 and MAX11603 are 8-bit, 8-channel, SPI-compatible SAR ADCs, they are not direct pin-to-pin replacements due to differing pinouts and reference architectures. The ADS7959QDBTRQ1 requires an external reference, whereas the MAX11603 includes an internal 2.048V reference, so replacing one with the other requires PCB layout changes and additional reference circuitry. Also, the ADS7959QDBTRQ1 offers AEC-Q100 qualification for automotive use, while the MAX11603 is commercial/industrial grade, making the ADS7959QDBTRQ1 more suitable for harsh environments. Careful validation of timing (CONVST, SCLK up to 20MHz) and supply rail compatibility (1.7V–5.25V IOVDD) is essential when migrating designs.
What practical steps should be taken to ensure signal integrity when sampling fast transients with the ADS7959QDBTRQ1 in a noisy 12V automotive system?
To maintain signal integrity with the ADS7959QDBTRQ1 in noisy 12V automotive systems, implement a staged filtering approach: place RC anti-aliasing filters (e.g., 10Ω + 10nF) on each analog input and ensure the sampling frequency (up to 1MSPS) is coordinated with interrupt latency in the host microcontroller. Use a star grounding topology to isolate digital switching noise from analog ground, and route SPI lines away from high-current paths. Because the device uses single-ended inputs, avoid sharing ADC ground with motor or solenoid returns. Additionally, leveraging the on-chip programmable gain amplifier (PGA) can improve small-signal resolution, but gain settings above 1x reduce input bandwidth, so validate step response under real load conditions.
What are the reliability implications of exceeding the MSL 3 reflow moisture sensitivity limit when assembling PCBs with the ADS7959QDBTRQ1?
Exceeding the MSL 3 limit (168 hours at ≤30°C/60% RH) for the ADS7959QDBTRQ1 risks 'popcorning' during reflow due to internal moisture vaporization, potentially causing delamination or bond wire damage. Given the 30-TSSOP package's thin profile and automotive qualification, any breach in dry pack storage protocol reduces long-term reliability in temperature-cycling environments. Mitigate this by logging exposure time, baking per J-STD-033 guidelines (125°C for 10 hours) if exceeded, and using nitrogen-assisted reflow to minimize thermal stress. Always verify post-reflow electrical performance, especially INL and offset drift, during high-volume production.
Can the ADS7959QDBTRQ1 operate reliably with a 3.3V digital rail and 5V analog supply in mixed-signal PLC modules, and what interface risks should be evaluated?
Yes, the ADS7959QDBTRQ1 supports split supplies (AVDD: 2.7V–5.25V, IOVDD: 1.7V–5.25V), making it suitable for 5V analog and 3.3V digital systems commonly found in PLC modules. However, the primary interface risk involves SPI level compatibility with 3.3V microcontrollers—ensure the host can tolerate 5V SDO outputs from the ADC or use bidirectional level shifters (e.g., TXS0108E). Additionally, ground bounce between analog and digital domains must be minimized using a unified analog-digital ground plane under the device. Monitor the REF pin for noise injection from digital switching, especially when driving high-capacitance reference sources, and always decouple both supply rails independently to maintain accuracy over extended industrial operating temperatures.
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ADS7959QDBTRQ1 CAD Models
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