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ADS8405IBPFBT
Texas Instruments
IC ADC 16BIT SAR 48TQFP
66019 Pcs New Original In Stock
16 Bit Analog to Digital Converter 1 Input 1 SAR 48-TQFP (7x7)
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ADS8405IBPFBT
Product Overview
1394046
DiGi Electronics Part Number
ADS8405IBPFBT-DGManufacturer
Texas Instruments
ADS8405IBPFBT
Description
IC ADC 16BIT SAR 48TQFPInventory
66019 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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ADS8405IBPFBT 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
ADS8405IBPFBT-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
-296-17636-1-NDR
2156-ADS8405IBPFBT
-296-17636-1-DG
296-17636-2-NDR
-296-17636-1
-ADS8405IBPFBTG4-NDR
296-17636-6
TEXTISADS8405IBPFBT
-ADS8405IBPFBT-NDR
296-17636-2
296-17636-1-NDR
296-17636-1
-ADS8405IBPFBTG4
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
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Quick turnaround on shipping; support staff went above and beyond.
de desembre 02, 2025
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de desembre 02, 2025
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Frequently Asked Questions (FAQ)
How does the ADS8405IBPFBT perform in high-noise industrial environments when using pseudo-differential inputs, and what layout practices minimize signal integrity risks?
The ADS8405IBPFBT's pseudo-differential input architecture provides moderate noise rejection in electrically noisy industrial settings, but designers must take care to minimize ground shifts and noise coupling on the analog input node. Because only the positive input is actively sampled while the negative input is fixed (typically to a reference or ground), common-mode noise rejection is limited compared to true differential ADCs. To ensure reliable performance, use a solid low-impedance analog ground plane, route the analog input signals as single-ended with tight coupling to AGND, and minimize trace lengths to reduce pickup. Additionally, placing a small RC filter (e.g., 10 Ω in series with 100 pF to ground) at the ADC input can reduce high-frequency noise without significantly affecting the 1.25MSPS sampling rate. Shielding sensitive traces and using star grounding techniques further improve signal integrity in high-noise environments.
Can I replace the ADS8405IBPFBT with the ADS8588S in a legacy design without changing my interface logic levels and supply configuration?
No, replacing the ADS8405IBPFBT with the ADS8588S introduces significant compatibility risks due to differences in voltage levels and interface architecture. The ADS8405IBPFBT supports digital supplies from 2.7V to 5.25V, allowing direct interfacing with both 3.3V and 5V logic systems via its parallel interface. In contrast, the ADS8588S requires a separate 1.8V DVDD and uses SPI, making it incompatible with your existing parallel control lines and timing. Additionally, the ADS8588S operates with true differential inputs, so analog front-end signal conditioning would also need redesign. If you're seeking a pin-compatible upgrade with similar parallel output, consider the ADS8403IBPF, which maintains the same 48-TQFP footprint and supply range.
What are the risks of relying on the internal reference in the ADS8405IBPFBT in a precision measurement system operating across the full temperature range?
Relying solely on the internal reference of the ADS8405IBPFBT in precision applications across the -40°C to 85°C range introduces accuracy risks due to uncontrolled drift and sensitivity to supply noise. While the internal reference simplifies design by eliminating an external component, its typical drift is ±10% over temperature and it lacks the stability of precision external references like the REF5025. In systems requiring better than ±0.1% total error, this variation can dominate total system error, especially when combined with INL and gain drift. For high-precision use, it's strongly recommended to bypass the internal reference and drive the REFIN pin with a low-noise, high-stability external reference. This upgrade improves long-term reliability and reduces temperature-induced measurement errors, particularly in weighing or sensor-multiplexed data acquisition systems.
How does the SAR architecture of the ADS8405IBPFBT impact its suitability for multiplexed multi-channel measurements compared to sigma-delta ADCs?
The SAR-based ADS8405IBPFBT is well-suited for fast, medium-to-high precision multiplexed measurements because it offers no-latency conversion and fast settling time, unlike sigma-delta ADCs which introduce digital filtering delays. However, since the ADS8405IBPFBT is a single-channel 16-bit SAR ADC, managing multiplexed inputs requires careful timing between channel switching and acquisition. The main risk is insufficient settling time for the internal sampling capacitor when switching between high-impedance sources. To mitigate this, ensure your multiplexer settles fully before enabling CONVST, use low-output-impedance signal conditioning (e.g., op-amps like OPA2350), and consider extending the acquisition window via external timing control. This makes the ADS8405IBPFBT more predictable than sigma-deltas in real-time control loops but demands tighter board-level signal chain design.
What are the long-term reliability concerns when the ADS8405IBPFBT is used near its maximum 1.25MSPS sampling rate in a thermally constrained space?
Operating the ADS8405IBPFBT near its 1.25MSPS maximum rate in a thermally constrained environment increases junction temperature, which can accelerate parametric drift and reduce long-term reliability. At high throughput, the internal sampling capacitor charges more frequently, increasing dynamic power dissipation. Even though the device is in a microPOWER™ series, poor PCB thermal design—such as insufficient copper pour or missing thermal vias—can lead to localized heating in the 48-TQFP package. This may shift offset, gain, and INL performance over time. To mitigate risk, reduce effective sampling rate when full bandwidth isn’t needed, use ground planes for heat spreading, and simulate junction temperature with worst-case ambient and power conditions. Additionally, perform accelerated life testing if the product is expected to operate above 70°C ambient for extended durations.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
ADS8405IBPFBT CAD Models
Texas Instruments ADS8405IBPFBT PCB symbols & footprints
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