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Texas Instruments ADS8342IPFBR
- Part No.:
- ADS8342IPFBR
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 48-TQFP
- Datasheet:
-
ADS8342IPFBR.pdf
- Description:
- IC ADC 16BIT SAR 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,354
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Product details
Overview
ADS8342IPFBR from Texas Instruments is a 4-channel, 16-bit successive approximation register (SAR) analog-to-digital converter with true bipolar input (±2.5V), 250kSPS sampling rate, selectable 8-/16-bit parallel interface, and TQFP-48 package. It integrates an on-chip sample-and-hold, 4:1 analog multiplexer, and 3-state parallel output drivers-designed for precision data acquisition in industrial process control systems requiring stable DC accuracy and low aperture jitter (50ps).
For engineers reviewing the ADS8342IPFBR datasheet, ADS8342IPFBR pinout, ADS8342IPFBR application, or ADS8342IPFBR equivalent, key selection considerations include its ±2.5V bipolar input range, 16-bit no-missing-codes guarantee (15-bit ensured), –40°C to +85°C operating temperature, 200mW power dissipation at ±5V supplies, and compatibility with both 3.3V and 5V digital I/O via independent BVDD supply.
Technical Context
The ADS8342IPFBR implements a capacitor-based SAR architecture with inherent sample-and-hold functionality, enabling accurate conversion of full-scale sine waves up to 16-bit resolution. Its pseudo-differential analog inputs (AINx/COMMON) support true bipolar operation while rejecting common-mode noise within ±0.1V.
Digital control uses asynchronous parallel signaling: CONV initiates conversion independently of CLK timing; BUSY indicates active conversion; BYTE selects 8- or 16-bit bus width; A0/A1 address the 4-channel MUX; and CLKDIV0/CLKDIV1 configure internal clock division (1×–8×) for external clocks up to 20MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit SAR ADC with 15-bit guaranteed no missing codes-ensures monotonicity and linearity across full temperature range. |
| Sampling Rate | Up to 250kSPS-achieved with 5MHz external clock and 1:1 divider; supports real-time monitoring of fast transients in test equipment. |
| Analog Input Range | True bipolar ±2.5V differential (AINx – COMMON)-enables direct measurement of AC-coupled sensor outputs without level-shifting. |
| Integral Linearity Error | ±6 LSB max (ADS8342I grade)-translates to ±0.09% FSR error, critical for calibration-sensitive medical instrument front-ends. |
| Aperture Jitter | 50 ps typical-limits SNR degradation in high-frequency signal capture; enables >14-bit ENOB at 10kHz input. |
| Power Dissipation | 200 mW at ±5V analog/digital supplies and 5V I/O-supports thermally constrained embedded DAQ modules. |
| Operating Temperature | –40°C to +85°C-qualified for industrial automation and laboratory environments without derating. |
Pinout & Package
TQFP-48 package (PFB designation), 7mm × 7mm body, 0.5mm pitch, exposed thermal pad (not electrically connected). Pin 1 marked by dot; pins 1–2 and 34–35 are NC (no connection) and must remain unconnected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN0–AIN3 (Pins 45–48) | Analog input channels | Selectable positive inputs for 4:1 MUX; each referenced to COMMON for pseudo-differential acquisition. |
| COMMON (Pin 44) | Analog common-mode reference | Accepts ±0.1V swing relative to AGND-used for remote ground sensing and common-mode noise rejection. |
| REFIN (Pin 41), REFGND (Pin 42) | External reference interface | Supports 2.0–2.55V external reference; REFGND carries CDAC switching current-requires low-impedance ground path. |
| A0, A1 (Pins 5–6) | MUX address inputs | Binary-encoded channel selection (Table 1); latched on CONV rising edge to define next conversion source. |
| CONV (Pin 8) | Conversion start trigger | Edge-sensitive control: falling edge switches from sample to hold mode-decouples timing from external clock stability. |
| BUSY (Pin 15) | Conversion status indicator | Active-high open-drain output signals ongoing conversion; goes low when 16-bit result is ready on DB[15:0]. |
| DB0–DB15 (Pins 16–23, 26–33) | Parallel data bus | 3-state outputs; BYTE pin (Pin 7) configures width-16-bit mode outputs full word; 8-bit mode alternates MSB/LSB on same pins. |
| +AVDD/–AVDD (Pins 39/37), +DVDD/–DVDD (Pins 12/14) | Separate analog/digital supplies | ±5V dual supplies isolate noise-sensitive analog core from digital switching; AGND/DGND/BGND tied at single point. |
Key Features
| Feature | Design Value |
|---|---|
| True bipolar input architecture | Accepts ±2.5V differential signals without external op-amp biasing-reduces BOM count and PCB area in sensor interfaces. |
| Integrated sample-and-hold | Capacitor-based SAR inherently samples input during acquisition phase-eliminates need for external S/H circuit in most applications. |
| Selectably wide parallel interface | BYTE pin toggles between 8-bit and 16-bit data bus modes-enables flexible microcontroller interfacing without glue logic. |
| Low aperture jitter (50ps) | Minimizes sampling uncertainty in AC measurements-preserves >14-bit ENOB at 10kHz, supporting high-fidelity waveform digitization. |
| Independent I/O voltage supply (BVDD) | 2.7–5.5V configurable logic interface-allows direct connection to 3.3V microcontrollers or 5V FPGAs without level shifters. |
Applications
| Data Acquisition Systems | Test & Measurement Equipment |
|---|---|
Use Scenario: High-precision voltage logging in automated calibration benches with multi-sensor inputs. IC Role / Device Role / Timing Role: 4-channel simultaneous-sampling ADC capturing synchronized analog waveforms at 250kSPS with <50ps aperture jitter. Use Value: 16-bit resolution and ±6 LSB INL ensure traceable metrology-grade accuracy per channel without post-calibration interpolation. |
Use Scenario: Portable oscilloscope front-end digitizing ±2.5V sensor outputs (e.g., accelerometers, strain gauges). IC Role / Device Role / Timing Role: Bipolar-input SAR ADC providing true DC-coupled acquisition with built-in sample-and-hold and MUX sequencing. Use Value: No missing codes and 14-bit ENOB enable reliable peak detection and RMS calculation on low-amplitude transients. |
| Industrial Process Control | Medical Instrumentation |
Use Scenario: PLC analog input module monitoring 4 pressure/temperature transmitters with isolated ±5V supplies. IC Role / Device Role / Timing Role: Precision ADC with separate analog/digital grounds (AGND/DGND/BGND) minimizing ground-loop noise in noisy factory environments. Use Value: –40°C to +85°C rating and 200mW power envelope allow convection-cooled operation in DIN-rail enclosures. |
Use Scenario: Patient monitor ECG/EEG signal conditioning where bipolar input captures small biopotentials referenced to body ground. IC Role / Device Role / Timing Role: Pseudo-differential ADC using COMMON pin to reject 50/60Hz mains interference while preserving signal integrity. Use Value: ±0.1V COMMON range and 95dB channel isolation suppress common-mode noise without active instrumentation amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8341IPFB | Single-ended input only (no COMMON pin); 16-bit, 250kSPS, same TQFP-48 package but lacks true bipolar capability. | Suitable for unipolar sensor interfaces (e.g., 0–5V RTD circuits) where common-mode rejection is unnecessary. | Select ADS8341IPFB only if system design eliminates need for differential referencing and reduces component count. |
| AD7656ASTZ | 6-channel, 16-bit SAR; ±10V input range; requires external reference; higher power (350mW); LQFP-64 package. | Targets higher-channel-count industrial DAQ where extended voltage range and simultaneous sampling matter more than size/power. | Choose AD7656ASTZ when expanding beyond 4 channels or needing ±10V full-scale without external gain stages. |
Compared with ADS8342IPFBR, ADS8341IPFB saves board space in unipolar systems but forfeits bipolar operation, while AD7656ASTZ adds channels and voltage range at the cost of larger footprint and 75% higher power-making ADS8342IPFBR optimal for compact, low-power, true-bipolar 4-channel DAQ.
Availability
ADS8342IPFBR is available at Aetrix Electronics and suitable for industrial process control, medical instrumentation, and test & measurement applications requiring stable component supply, long-term lifecycle support, and guaranteed performance over –40°C to +85°C.
Supply support for ADS8342IPFBR 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 specializing in analog and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade ICs.
The ADS8342IPFBR belongs to TI's precision SAR ADC product line, engineered for high-resolution, low-noise data acquisition in harsh environments where DC accuracy, thermal stability, and bipolar input flexibility are essential.
FAQ
What is the maximum sampling rate supported by the ADS8342IPFBR?
The ADS8342IPFBR achieves a maximum throughput rate of 250kSPS when operated with a 5MHz external clock and 1:1 internal clock division. This rate is maintained across the full –40°C to +85°C temperature range and requires proper decoupling of ±5V analog and digital supplies per the datasheet layout guidelines. The ADS8342IPFBR maintains 16-bit no-missing-codes performance at this rate.
Does the ADS8342IPFBR require an external reference voltage?
Yes, the ADS8342IPFBR requires an external reference voltage applied to the REFIN pin (Pin 41), with a valid range of 2.0V to 2.55V. The internal reference amplifier buffers this input, allowing use of high-impedance sources. A 0.22µF ceramic capacitor must be placed directly at the REFIN pin to minimize noise coupling. The ADS8342IPFBR does not include an internal reference.
How does the COMMON pin function in the ADS8342IPFBR analog input structure?
The COMMON pin (Pin 44) serves as the pseudo-differential reference for all four analog inputs (AIN0–AIN3). It accepts a limited swing of ±0.1V relative to AGND and enables common-mode noise rejection-especially effective against 50/60Hz interference in medical or industrial settings. Unlike fully differential ADCs, the COMMON voltage is sampled once per conversion and held, making it ideal for remote ground sensing.
Can the ADS8342IPFBR interface directly with a 3.3V microcontroller?
Yes, the ADS8342IPFBR supports direct interfacing with 3.3V microcontrollers via its independent BVDD supply pin (Pin 24), which accepts 2.7V to 3.6V. Digital inputs (CS, RD, CONV, etc.) meet LVCMOS thresholds at this voltage, and outputs (DB0–DB15, BUSY) drive 3.3V-compatible logic levels. No level-shifting circuitry is required when BVDD = 3.3V.
What is the significance of the BYTE pin on the ADS8342IPFBR?
The BYTE pin (Pin 7) controls the data bus width: when high, the ADS8342IPFBR outputs only the lower 8 bits (DB7–DB0) on each read cycle; when low, it presents the full 16-bit result (DB15–DB0) in one parallel transfer. This allows flexible integration with 8-bit or 16-bit microcontrollers without external multiplexing, reducing PCB complexity and firmware overhead in resource-constrained designs.
ADS8342IPFBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 4
- Input Type:
- Pseudo-Differential, Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- ±5V
- Voltage - Supply, Digital:
- ±5V
- Features:
- Selectable Address
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 48-TQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS8342IPFBR FAQ
1.How can I place an order for ADS8342IPFBR through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS8342IPFBR 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 ADS8342IPFBR reliable?
The price and inventory of ADS8342IPFBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS8342IPFBR is usually 5 days.
3.What payment methods are accepted for ADS8342IPFBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS8342IPFBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS8342IPFBR?
ADS8342IPFBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS8342IPFBR 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 ADS8342IPFBR?
For technical support, including ADS8342IPFBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS8342IPFBR requirements.
6.How does Aetrix verify that ADS8342IPFBR is sourced from the original manufacturer or authorized distributors?
All ADS8342IPFBR 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 ADS8342IPFBR meets industry standards.
7.What is the process for return or replacement of ADS8342IPFBR?
All ADS8342IPFBR units undergo pre-shipment inspection (PSI). If there is an issue with ADS8342IPFBR, 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 ADS8342IPFBR part is unused and in its original packaging.
Return procedure for ADS8342IPFBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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