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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Texas Instruments ADS8406IBPFBT

Name: ADS8406IBPFBT
Brand: Texas Instruments
SKU: ADS8406IBPFBT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADS8406IBPFBT

Manufacturer:: Texas Instruments

Category:: Analog to Digital Converters (ADC)

Package:: 48-TQFP

Datasheet:: ADS8406IBPFBT.pdf

Description:: IC ADC 16BIT SAR 48TQFP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ADS8406IBPFBT from Texas Instruments is a 16-bit, 1.25 MSPS pseudo-bipolar fully differential SAR analog-to-digital converter with internal 4.096-V reference, parallel 16-/8-bit interface, and zero-latency operation. It delivers ±1 LSB DNL max, 90 dB SNR at 100 kHz, and operates over –40°C to +85°C in industrial data acquisition systems.

For engineers reviewing the ADS8406IBPFBT datasheet, ADS8406IBPFBT pinout, ADS8406IBPFBT application, or ADS8406IBPFBT equivalent, key selection criteria include its pseudo-bipolar input range (–2 V to +2 V), 650 ns conversion time, 48-pin TQFP package, and compatibility with 3 V or 5 V digital I/O supplies.

Technical Context

The ADS8406IBPFBT implements a capacitor-based successive approximation register (SAR) architecture with inherent sample-and-hold, enabling true zero-latency conversion. Its fully differential pseudo-bipolar input accepts ±2 V spans referenced to internal 4.096 V, with input common-mode range of –0.2 V to V_REF + 0.2 V.

Timing is controlled by an internal oscillator-no external clock required. Conversion is initiated by CONVST falling edge while CS is low, with BUSY indicating active conversion. Data is output in 2's complement format via parallel DB[15:0] bus, configurable for 16-bit or two-cycle 8-bit reads using BYTE control.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	16-bit with no missing codes-guarantees monotonicity and full code coverage across full temperature range.
Throughput Rate	1.25 MSPS-supports real-time sampling of high-bandwidth signals up to 5 MHz small-signal bandwidth.
INL / DNL	±2 LSB / +1.25, –1 LSB max-ensures accurate amplitude fidelity in precision instrumentation and transducer interfaces.
SNR / THD	90 dB / –95 dB at 100 kHz-enables high-fidelity digitization of low-distortion analog waveforms in communications and medical instruments.
Conversion Time	650 ns typ-defines minimum inter-conversion interval and enables deterministic timing in synchronous acquisition systems.
Reference	Internal 4.096 V ±0.75% (4.065–4.13 V)-provides stable, calibrated scaling without external components; REFIN accepts 2.5–4.2 V external references.
Power Dissipation	155 mW typ at 1.25 MSPS-achieves high resolution and speed while maintaining micro-power efficiency for thermally constrained designs.

Pinout & Package

ADS8406IBPFBT is housed in a 48-pin TQFP (PFB) package with exposed thermal pad. Pin functions are validated per TI SLAS426A datasheet Rev. December 2004.

Pin/Terminal	Circuit Role	Design Meaning
+IN / –IN	Differential analog input	Accepts pseudo-bipolar fully differential signal; input span limited to –V_REF to +V_REF (–2 V to +2 V).
CONVST	Convert start trigger	Falling-edge initiates hold mode; jitter ≤10 ps preserves aperture accuracy for high-SNR performance.
BUSY	Status output	Active-high during conversion (min 610 ns high pulse); used for interrupt-driven or polling-based read synchronization.
CS / RD	Chip select / read strobe	Both must be low to enable 3-state DB[15:0] bus; supports asynchronous or auto-read modes depending on tie-off configuration.
BYTE	Bus width selector	Low = 16-bit output on DB[15:0]; high = first read returns MSB on DB[15:8], second read returns LSB on same pins.
REFIN / REFOUT / REFM	Reference interface	REFIN accepts internal or external reference; REFOUT sources internal 4.096 V; REFM is reference ground (dual pins for low-impedance return).
+VA / +VBD / AGND / BDGND	Power & ground domains	+VA (5 V) powers analog core; +VBD (2.7–5.25 V) powers digital interface; separate AGND/BDGND prevents noise coupling.

Key Features

Feature	Design Value
Zero-latency SAR architecture	Eliminates pipeline delay-output reflects instantaneous sampled value, critical for closed-loop control and real-time feedback.
Pseudo-bipolar fully differential input	Supports true differential signaling with common-mode rejection >80 dB at 1 MHz, rejecting noise in noisy industrial environments.
Configurable 16-/8-bit parallel interface	Reduces host MCU bus width requirements without sacrificing throughput-enables legacy 8-bit microcontroller integration.
Internal 4.096-V reference with 36 ppm/°C drift	Removes need for external precision reference IC and associated layout complexity; simplifies BOM and calibration.
Single 5-V analog supply, wide digital I/O range	Operates with +VA = 4.75–5.25 V and +VBD = 2.7–5.25 V-allows direct interfacing to 3.3-V or 5-V logic without level shifters.

Applications

High-Speed Data Acquisition	Medical Instrumentation
Use Scenario: Simultaneous multi-channel voltage monitoring in portable ECG or EEG systems requiring sub-microsecond timing alignment. IC Role / Device Role / Timing Role: Primary ADC capturing biopotential waveforms at ≥1 MSPS with minimal group delay and deterministic latency. Use Value: 90 dB SNR and ±1.25 LSB DNL preserve diagnostic signal integrity; zero-latency enables real-time R-peak detection and artifact rejection.	Use Scenario: Digitizing amplified sensor outputs in ultrasound beamforming modules where phase coherence across channels is critical. IC Role / Device Role / Timing Role: High-resolution, low-jitter sampling front-end synchronized across multiple ADCs via shared CONVST. Use Value: 25 ps aperture jitter and 80 dB CMRR maintain channel-to-channel matching; 16-bit resolution resolves fine tissue contrast gradients.
Communications Test Equipment	Industrial Transducer Interface
Use Scenario: Baseband I/Q sampling in RF vector signal analyzers measuring modulation accuracy of LTE/Wi-Fi signals. IC Role / Device Role / Timing Role: Dual-channel ADC subsystem (paired devices) acquiring complex baseband signals with precise amplitude and phase tracking. Use Value: –95 dB THD and 95 dB SFDR enable accurate EVM measurement; internal reference eliminates inter-channel gain mismatch.	Use Scenario: High-accuracy bridge sensor readout in strain-gauge-based load cells or pressure transmitters operating in harsh factory environments. IC Role / Device Role / Timing Role: Precision analog front-end converting low-level mV-range differential outputs into digital values for PLC or RTU processing. Use Value: ±2 LSB INL and 155 mW power allow high-accuracy measurements without self-heating drift; pseudo-bipolar input accommodates bidirectional force/pressure ranges.

High-Speed Data Acquisition

Medical Instrumentation

Use Scenario: Simultaneous multi-channel voltage monitoring in portable ECG or EEG systems requiring sub-microsecond timing alignment.

IC Role / Device Role / Timing Role: Primary ADC capturing biopotential waveforms at ≥1 MSPS with minimal group delay and deterministic latency.

Use Value: 90 dB SNR and ±1.25 LSB DNL preserve diagnostic signal integrity; zero-latency enables real-time R-peak detection and artifact rejection.

Use Scenario: Digitizing amplified sensor outputs in ultrasound beamforming modules where phase coherence across channels is critical.

IC Role / Device Role / Timing Role: High-resolution, low-jitter sampling front-end synchronized across multiple ADCs via shared CONVST.

Use Value: 25 ps aperture jitter and 80 dB CMRR maintain channel-to-channel matching; 16-bit resolution resolves fine tissue contrast gradients.

Communications Test Equipment

Industrial Transducer Interface

Use Scenario: Baseband I/Q sampling in RF vector signal analyzers measuring modulation accuracy of LTE/Wi-Fi signals.

IC Role / Device Role / Timing Role: Dual-channel ADC subsystem (paired devices) acquiring complex baseband signals with precise amplitude and phase tracking.

Use Value: –95 dB THD and 95 dB SFDR enable accurate EVM measurement; internal reference eliminates inter-channel gain mismatch.

Use Scenario: High-accuracy bridge sensor readout in strain-gauge-based load cells or pressure transmitters operating in harsh factory environments.

IC Role / Device Role / Timing Role: Precision analog front-end converting low-level mV-range differential outputs into digital values for PLC or RTU processing.

Use Value: ±2 LSB INL and 155 mW power allow high-accuracy measurements without self-heating drift; pseudo-bipolar input accommodates bidirectional force/pressure ranges.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed SAR ADC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADS8412IPFBT	Same 48-pin TQFP package and pinout; 16-bit, 2 MSPS, ±2 LSB INL, but requires external reference and has higher 200 mW power.	Higher throughput suits wider bandwidth test equipment; lacks integrated reference, increasing BOM and layout complexity.	Select when >1.25 MSPS is mandatory and external reference infrastructure already exists.
ADS8402IPFBT	Pin-compatible 48-pin TQFP; 16-bit, 500 kSPS, ±1 LSB DNL, 85 dB SNR, 100 mW-lower speed, lower noise floor, lower power.	Better suited for battery-powered portable instruments where SNR > throughput; insufficient for real-time 1.25 MSPS streaming.	Select when system sampling rate ≤500 kSPS and ultra-low power or superior SNR is prioritized over speed.

Compared with ADS8406IBPFBT, ADS8412IPFBT trades integrated reference and lower power for higher speed, while ADS8402IPFBT offers better SNR and lower power at reduced throughput-making ADS8406IBPFBT the optimal balance of speed, integration, and precision for industrial DAQ.

Availability

ADS8406IBPFBT is available at Aetrix Electronics and suitable for high-speed data acquisition systems, medical instrumentation, communications test equipment, and industrial transducer interfaces requiring stable component supply across extended temperature ranges.

Supply support for ADS8406IBPFBT 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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The ADS8406IBPFBT belongs to TI's high-speed SAR ADC family designed for precision, zero-latency digitization in demanding real-time systems-emphasizing integration, noise performance, and ease of interface.

FAQ

What is the guaranteed no-missing-codes resolution of the ADS8406IBPFBT?

The ADS8406IBPFBT guarantees 16-bit no-missing-codes operation across its full –40°C to +85°C industrial temperature range. This is explicitly specified in the datasheet under "SYSTEM PERFORMANCE" as "ADS8406IB - 16 Bits" with "No missing codes" resolution, ensuring monotonic behavior and full code coverage without gaps.

Does the ADS8406IBPFBT require an external clock source?

No, the ADS8406IBPFBT does not require an external clock. It uses an internal oscillator to generate the conversion clock, enabling a fixed 1.25 MSPS throughput with 650 ns typical conversion time. This eliminates clock routing, jitter concerns, and external component dependencies-simplifying system design and improving timing robustness.

How is the internal 4.096-V reference configured on the ADS8406IBPFBT?

To use the internal reference on the ADS8406IBPFBT, connect REFOUT (Pin 2) to REFIN (Pin 1) with a 0.1-µF decoupling capacitor, and place a 1-µF storage capacitor between REFOUT and REFM (Pins 47–48). The internal reference is double-buffered and provides 4.096 V ±0.75% with 36 ppm/°C drift-no external components beyond these capacitors are needed.

Can the ADS8406IBPFBT interface directly with a 3.3-V microcontroller?

Yes, the ADS8406IBPFBT supports direct interfacing with 3.3-V microcontrollers. Its +VBD supply accepts 2.7 V to 5.25 V, and digital I/O thresholds (VIH = +VBD – 1 V, VIL = 0.8 V) are compatible with 3.3-V CMOS logic. No level-shifting circuitry is required when +VBD = 3.3 V, simplifying host connectivity and reducing board area.

What is the absolute maximum input voltage range for +IN and –IN on the ADS8406IBPFBT?

The absolute maximum input voltage for +IN and –IN on the ADS8406IBPFBT is –0.4 V to (+VA + 0.1 V), where +VA is the analog supply (typically 5 V). Within recommended operating conditions, each input must stay within –0.2 V to (V_REF + 0.2 V) = 4.296 V, and their differential span must remain within –V_REF to +V_REF (–4.096 V to +4.096 V), though the usable pseudo-bipolar range is –2 V to +2 V.

ADS8406IBPFBT Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: microPOWER™

Package/Case:: 48-TQFP

Packaging:: Tape & Reel (TR)

Product Status:: Active

Number of Bits:: 16

Sampling Rate (Per Second):: 1.25M

Number of Inputs:: 1

Input Type:: 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

Supplier Device Package:: 48-TQFP (7x7)

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

ADS8406IBPFBT FAQ

1.How can I place an order for ADS8406IBPFBT through Aetrix?

Please submit a Request for Quotation (RFQ) for ADS8406IBPFBT 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 ADS8406IBPFBT reliable?

The price and inventory of ADS8406IBPFBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8406IBPFBT is usually 5 days.

3.What payment methods are accepted for ADS8406IBPFBT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8406IBPFBT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADS8406IBPFBT?

ADS8406IBPFBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADS8406IBPFBT 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 ADS8406IBPFBT?

For technical support, including ADS8406IBPFBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8406IBPFBT requirements.

6.How does Aetrix verify that ADS8406IBPFBT is sourced from the original manufacturer or authorized distributors?

All ADS8406IBPFBT 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 ADS8406IBPFBT meets industry standards.

7.What is the process for return or replacement of ADS8406IBPFBT?

All ADS8406IBPFBT units undergo pre-shipment inspection (PSI). If there is an issue with ADS8406IBPFBT, 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 ADS8406IBPFBT part is unused and in its original packaging.

Return procedure for ADS8406IBPFBT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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