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Texas Instruments ADS1626IPAPRG4
- Part No.:
- ADS1626IPAPRG4
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 64-PowerTQFP
- Datasheet:
-
ADS1626IPAPRG4.pdf
- Description:
- IC ADC 18BIT SIGMA-DELTA 64HTQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,376
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Product details
Overview
ADS1626IPAPRG4 from Texas Instruments is an 18-bit, 1.25MSPS delta-sigma analog-to-digital converter with on-chip FIFO buffer, ±0.0025dB passband ripple, 93dB SNR, and −101dB THD. It operates from +5V analog and +3V digital supplies, supports 2.7V–5.25V I/O voltage, and targets high-fidelity data acquisition in vibration analysis and medical imaging systems.
For engineers reviewing the ADS1626IPAPRG4 datasheet, ADS1626IPAPRG4 pinout, ADS1626IPAPRG4 application, or ADS1626IPAPRG4 equivalent, key selection criteria include its 615kHz bandwidth, adjustable FIFO level control (FIFO_LEV[2:0]), selectable internal/external reference, direct TMS320C6000 DSP interface, and PowerPAD™ TQFP-64 thermal performance.
Technical Context
The ADS1626IPAPRG4 employs a stable 2-1-1 pipelined delta-sigma modulator sampling at 40MSPS, followed by a low-ripple linear-phase digital filter decimating to 1.25MSPS output rate. Its architecture delivers 615kHz −3dB bandwidth with ±0.0025dB passband ripple up to 550kHz.
It features dual supply domains (AVDD = 5V, DVDD/IOVDD = 3V), analog input range of ±1.467VREF, out-of-range monitoring (OTR), and power-down mode activated via PD pin. The FIFO buffer-exclusive to ADS1626-is configurable via three dedicated input pins (FIFO_LEV[2:0]) and enables flexible data flow management for burst-mode acquisition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit - delivers 262,144 distinct output codes for ultra-high dynamic range measurement |
| Data Rate | 1.25MSPS - supports real-time capture of signals up to 615kHz bandwidth without aliasing |
| SNR | 93dB - enables detection of signals buried 104.65× below full scale (≈2×104 V/V) |
| THD | −101dB - ensures harmonic distortion remains below −0.0003% of fundamental amplitude |
| SFDR | 103dB - guarantees spurious content stays ≥105.15× below signal level (≈141,000×) |
| Passband Ripple | ±0.0025dB - maintains amplitude flatness within 0.029% across 0–550kHz for precision spectral analysis |
| Supply Voltages | AVDD = 4.75–5.25V; DVDD = 2.7–3.3V; IOVDD = 2.7–5.25V - enables mixed-voltage system integration |
Pinout & Package
ADS1626IPAPRG4 is housed in a thermally enhanced HTQFP-64 package with PowerPAD™ exposed thermal pad (PAP designation), requiring PCB copper pour for optimal junction-to-board thermal resistance (θJA = 25°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AINP / AINN | Differential analog input | Accepts ±1.467VREF differential signal; requires 2.0V common-mode bias (VMID) for optimal linearity |
| VREFP / VREFN | Reference voltage terminals | Supports internal (3.0V) or external reference; defines full-scale input range and gain accuracy |
| FIFO_LEV[2:0] | FIFO level configuration inputs | Set FIFO depth (1–8 words); only present on ADS1626 - absent on ADS1625 |
| DOUT[17:0] | Parallel digital output bus | 18-bit MSB-first parallel interface; directly compatible with TMS320C6000 DSP data buses |
| PD | Power-down control | Active-low input; reduces power dissipation to 5mW when asserted, enabling rapid sleep/wake cycles |
| DRDY | Data-ready indicator | Active-low pulse synchronized to falling edge of CLK; signals valid data on DOUT[17:0] |
| OTR | Out-of-range monitor | Active-high flag indicating AINP or AINN exceeded absolute voltage limits (−0.1V to 4.6V vs AGND) |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable FIFO buffer | Configurable 1–8-word depth via FIFO_LEV[2:0] pins - eliminates timing-critical polling in burst acquisition |
| Selectably enabled internal reference | 3.0V ±0.25V reference with 50ppm/°C drift - removes need for external precision reference in cost-sensitive designs |
| Independent I/O supply (IOVDD) | 2.7V–5.25V operation - allows direct interfacing with 3.3V, 5V, or mixed-logic DSPs without level shifters |
| Programmable analog power dissipation | 150–515mW via RBIAS resistor - enables trade-off between SNR and thermal budget in space-constrained layouts |
| Linear-phase digital filter | 615kHz −3dB bandwidth with ±0.0025dB ripple - preserves phase coherence for time-domain analysis (e.g., impulse response) |
Applications
| Vibration Analysis System | Medical Ultrasound Receiver |
|---|---|
|
Use Scenario: Capturing high-frequency mechanical resonance signatures from accelerometers in rotating machinery. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog sensor outputs at 1.25MSPS with minimal group delay variation. Use Value: 93dB SNR and 103dB SFDR enable detection of sub-micron displacement harmonics amid broadband noise floor. |
Use Scenario: Digitizing echo return signals from piezoelectric transducers in portable ultrasound scanners. IC Role / Device Role / Timing Role: High-linearity ADC front-end converting RF-bandwidth analog beamformed signals before digital beamforming. Use Value: ±0.0025dB passband ripple preserves amplitude fidelity across 550kHz diagnostic bandwidth for accurate tissue contrast rendering. |
| Automated Test Equipment (ATE) | Scientific Data Acquisition |
|
Use Scenario: High-accuracy stimulus-response testing of RF components using vector signal analyzers. IC Role / Device Role / Timing Role: Precision digitizer capturing wide-dynamic-range swept-frequency responses with calibrated gain/offset stability. Use Value: 0.25% gain error and 10ppm/°C drift ensure traceable metrology-grade measurements over temperature. |
Use Scenario: Long-duration environmental monitoring of seismic or acoustic waveforms in remote field deployments. IC Role / Device Role / Timing Role: Low-drift, low-power ADC operating continuously under battery or energy-harvested power constraints. Use Value: Adjustable power dissipation (150–515mW) and 5mW power-down mode extend operational lifetime without sacrificing resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, high-precision ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1625IPAPRG4 | No FIFO buffer; identical resolution, data rate, SNR, THD, and package | Lacks burst-mode data buffering - requires tighter timing control from host processor | Select when deterministic latency and minimal firmware overhead outweigh FIFO utility |
| AD7641ASTZ | SAR architecture; 18-bit, 2MSPS, no on-chip FIFO; requires external reference and separate clock | Higher speed but lower SNR (91dB) and SFDR (100dB); no integrated digital filter or linear-phase response | Choose for applications prioritizing throughput over spectral purity or requiring zero-latency conversion |
Compared with ADS1625IPAPRG4, the ADS1626IPAPRG4 adds FIFO-level configurability at identical static/dynamic performance; versus AD7641ASTZ, it trades raw speed for superior noise floor, harmonic suppression, and built-in filtering-making it preferable for spectral integrity-critical instrumentation.
Availability
ADS1626IPAPRG4 is available at Aetrix Electronics and suitable for scientific instruments, automated test equipment, and medical imaging systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADS1626IPAPRG4 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 leadership in precision data converters and signal chain solutions.
The ADS1626IPAPRG4 belongs to TI's high-performance delta-sigma ADC family designed for demanding measurement applications where spectral purity, linearity, and thermal stability are critical-particularly in test & measurement and medical diagnostics.
FAQ
What is the maximum clock frequency supported by ADS1626IPAPRG4?
The ADS1626IPAPRG4 supports a clock input frequency (fCLK) ranging from 1MHz to 50MHz, with typical operation at 40MHz. At 40MHz, the device achieves its rated 1.25MSPS output data rate and specified dynamic performance (93dB SNR, −101dB THD). Operation above 40MHz may reduce SNR due to increased jitter sensitivity and analog front-end settling limitations.
Does ADS1626IPAPRG4 require an external reference voltage?
No, ADS1626IPAPRG4 does not require an external reference voltage. It includes a selectable internal 3.0V reference (enabled via REFEN pin low), with 50ppm/°C drift and 15ms startup time. External references (2.5V–3.2V) may be used for improved accuracy or lower drift, but the internal option provides full functionality without additional components.
How does the FIFO function in ADS1626IPAPRG4 differ from standard buffer implementations?
The ADS1626IPAPRG4 FIFO is hardware-configured via three dedicated pins (FIFO_LEV[2:0]), setting depth from 1 to 8 words without register writes. Unlike programmable memory buffers, it operates autonomously-data flows into the FIFO on DRDY assertion and is read on RD/CS strobes-eliminating software overhead and guaranteeing deterministic latency for burst acquisition.
What thermal management is required for ADS1626IPAPRG4 in continuous operation?
ADS1626IPAPRG4 uses PowerPAD™ technology and requires soldering the exposed thermal pad to a minimum 1cm² copper pour on the PCB. With proper layout, θJA is 25°C/W. At max power (515mW) and 85°C ambient, junction temperature reaches ~106°C-within the +105°C max operating limit. For extended reliability, maintain ambient ≤70°C or add airflow.
Can ADS1626IPAPRG4 interface directly with a 5V microcontroller without level shifting?
Yes, ADS1626IPAPRG4 supports IOVDD from 2.7V to 5.25V. When IOVDD = 5V, its digital outputs (DOUT[17:0], DRDY, OTR) meet 5V TTL logic thresholds (VOH ≥ 4.0V, VOL ≤ 0.4V), and inputs (RD, CS, PD, RESET) accept 5V-compatible levels (VIH ≥ 3.5V). No level shifter is needed for direct 5V MCU interfacing.
ADS1626IPAPRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-PowerTQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Number of Bits:
- 18
- Sampling Rate (Per Second):
- 1.25M
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- Parallel
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 2.7V ~ 3.3V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 64-HTQFP (10x10)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADS1626IPAPRG4 FAQ
1.How can I place an order for ADS1626IPAPRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADS1626IPAPRG4 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 ADS1626IPAPRG4 reliable?
The price and inventory of ADS1626IPAPRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADS1626IPAPRG4 is usually 5 days.
3.What payment methods are accepted for ADS1626IPAPRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADS1626IPAPRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADS1626IPAPRG4?
ADS1626IPAPRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADS1626IPAPRG4 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 ADS1626IPAPRG4?
For technical support, including ADS1626IPAPRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADS1626IPAPRG4 requirements.
6.How does Aetrix verify that ADS1626IPAPRG4 is sourced from the original manufacturer or authorized distributors?
All ADS1626IPAPRG4 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 ADS1626IPAPRG4 meets industry standards.
7.What is the process for return or replacement of ADS1626IPAPRG4?
All ADS1626IPAPRG4 units undergo pre-shipment inspection (PSI). If there is an issue with ADS1626IPAPRG4, 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 ADS1626IPAPRG4 part is unused and in its original packaging.
Return procedure for ADS1626IPAPRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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