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ADS8405IPFBT
Texas Instruments
IC ADC 16BIT SAR 48TQFP
35121 Pcs New Original In Stock
16 Bit Analog to Digital Converter 1 Input 1 SAR 48-TQFP (7x7)
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5.0 / 5.0
- (98 Ratings)
ADS8405IPFBT
Product Overview
1429701
DiGi Electronics Part Number
ADS8405IPFBT-DGManufacturer
Texas Instruments
ADS8405IPFBT
Description
IC ADC 16BIT SAR 48TQFPInventory
35121 Pcs New Original In Stock
16 Bit Analog to Digital Converter 1 Input 1 SAR 48-TQFP (7x7)
Quantity
Minimum 1
Minimum 1
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ADS8405IPFBT Technical Specifications
Category
Data Acquisition, Analog to Digital Converters (ADC)
Packaging
Cut Tape (CT) & Digi-Reel®
Series
microPOWER™
Product Status
Active
Number of Bits
16
Sampling Rate (Per Second)
1.25M
Number of Inputs
1
Input Type
Pseudo-Differential
Data Interface
Parallel
Configuration
S/H-ADC
Ratio - S/H:ADC
1:1
Number of A/D Converters
1
Architecture
SAR
Reference Type
External, Internal
Voltage - Supply, Analog
5V
Voltage - Supply, Digital
2.7V ~ 5.25V
Features
-
Operating Temperature
-40°C ~ 85°C
Package / Case
48-TQFP
Supplier Device Package
48-TQFP (7x7)
Mounting Type
Surface Mount
Base Product Number
ADS8405
Datasheet & Documents
HTML Datasheet
ADS8405IPFBT-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
296-17637-2-NDR
-296-17637-1-NDR
-ADS8405IPFBT-NDR
-ADS8405IPFBTG4-NDR
-ADS8405IPFBTG4
ADS8405IPFBTG4
-296-17637-1
ADS8405IPFBTG4-DG
-296-17637-1-DG
296-17637-1-NDR
296-17637-6
296-17637-1
296-17637-2
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)
de desembre 02, 2025
Livraison ultra rapide, je suis vraiment satisfait de leur efficacité.
de desembre 02, 2025
DiGi Electronics' commitment to punctuality is truly commendable.
de desembre 02, 2025
The variety offered by DiGi Electronics is outstanding, and I always appreciate their clear, upfront pricing.
de desembre 02, 2025
Their support staff provided clear and helpful guidance throughout the purchasing process.
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Frequently Asked Questions (FAQ)
What are the key design risks when replacing the ADS8405IPFBT with a lower-cost SAR ADC like the AD7685 in a high-accuracy industrial sensor interface?
When considering a drop-in replacement of the ADS8405IPFBT with the AD7685 (Analog Devices), be aware that while both are 16-bit SAR ADCs, the ADS8405IPFBT offers a guaranteed 1.25 MSPS throughput with lower aperture jitter and better DC accuracy over temperature (-40°C to 85°C). The AD7685, though pin-compatible in some packages, typically operates at 250 kSPS and may introduce timing bottlenecks in high-speed control loops. Additionally, the ADS8405IPFBT’s pseudo-differential input provides better common-mode noise rejection in electrically noisy environments—critical in motor drive or power monitoring applications. Replacing it without re-evaluating signal chain timing, reference stability, and layout parasitics can lead to degraded SNR and missed real-time deadlines.
Can the ADS8405IPFBT safely operate with a 3.3V digital supply while maintaining full 5V analog input range, and what are the interface risks?
Yes, the ADS8405IPFBT supports separate analog (5V) and digital (2.7V–5.25V) supplies, allowing 3.3V logic interfacing while preserving the full 5V analog input range. However, when using a 3.3V DVDD, ensure that the parallel data bus timing meets the t_SU and t_H requirements specified in the datasheet at reduced voltage—slower rise times can cause setup/hold violations. Also, level-shifting may be needed if the host microcontroller uses 1.8V logic. A pull-up resistor network or buffer (e.g., SN74LVC8T245) is recommended to prevent bus contention and ensure reliable data capture during high-speed reads.
How does the ADS8405IPFBT compare to the LTC2380-16 in terms of power efficiency and noise performance for battery-powered data acquisition systems?
The ADS8405IPFBT, part of TI’s microPOWER™ series, consumes approximately 8 mW at 1.25 MSPS, making it suitable for moderate-power portable systems. In contrast, the LTC2380-16 (Analog Devices) offers lower power (~5 mW) but at a reduced 250 kSPS rate and requires a more complex SPI interface. For battery-powered designs needing high throughput, the ADS8405IPFBT’s parallel interface enables faster data offload and deterministic timing, reducing MCU wake time. However, the LTC2380-16 has superior SNR (92 dB vs. ~88 dB) due to its differential input and internal reference. Choose the ADS8405IPFBT when speed and interface simplicity outweigh ultra-low noise needs.
What layout and grounding practices are critical to avoid metastability or code errors when integrating the ADS8405IPFBT in a mixed-signal PCB with switching regulators?
To prevent metastability and missing codes in the ADS8405IPFBT, isolate the analog ground (AGND) and digital ground (DGND) at a single point near the ADC, and route all analog signals away from high-di/dt digital traces (e.g., clock lines, parallel bus). Place the external reference voltage (if used) close to the REF pin with a low-ESR ceramic capacitor (10 µF + 0.1 µF). Avoid running switching regulator traces beneath the 48-TQFP package, as magnetic coupling can induce noise in the SAR capacitor array. Use a solid ground plane beneath the device and ensure the thermal pad is properly soldered to improve thermal stability and reduce ground impedance—this is especially important given the MSL 2 moisture sensitivity, which demands careful reflow profiling to avoid delamination.
Is the ADS8405IPFBT a reliable long-term choice for automotive-grade applications, and what qualification gaps should engineers address?
While the ADS8405IPFBT is rated for -40°C to 85°C and is RoHS3 compliant, it is not AEC-Q100 qualified, which limits its direct use in automotive powertrain or safety-critical systems. For under-hood or cabin applications requiring extended temperature ranges or higher reliability, consider the ADS8406IPFBT (automotive-grade variant) or validate the ADS8405IPFBT through additional HALT (Highly Accelerated Life Testing). Pay special attention to long-term drift of the internal reference (if used) and solder joint integrity under thermal cycling. If sourcing from cut tape, verify lot traceability and avoid mixing reel sources to prevent counterfeit risks—TI’s authentic parts include laser-marked top codes and proper MSL labeling.
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ADS8405IPFBT CAD Models
Texas Instruments ADS8405IPFBT PCB symbols & footprints
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