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Texas Instruments ADC12081CIVTX/NOPB
- Part No.:
- ADC12081CIVTX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 32-LQFP
- Datasheet:
-
ADC12081CIVTX/NOPB.pdf
- Description:
- IC ADC 12BIT PIPELINED 32TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,455
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Product details
Overview
ADC12081CIVTX/NOPB from Texas Instruments is a monolithic CMOS 12-bit, 5 MSPS pipelined analog-to-digital converter with integrated sample-and-hold, internal reference buffer amplifier, and self-calibration circuitry. It operates on a single +5 V supply, accepts 0–2 VPP analog input, and delivers TTL/CMOS-compatible 12-bit straight-binary outputs - used in PC-based data acquisition, waveform digitizers, and scanner front ends.
For engineers reviewing the ADC12081CIVTX/NOPB datasheet, ADC12081CIVTX/NOPB pinout, ADC12081CIVTX/NOPB application, or ADC12081CIVTX/NOPB equivalent, key selection considerations include its 68 dB SNR (typ), ±0.35 LSB DNL (typ), 10.9-bit ENOB (typ), 100 MHz full-power bandwidth, and support for calibration-triggered accuracy maintenance across −40°C to +85°C.
Technical Context
The ADC12081CIVTX/NOPB employs a 15-stage pipelined conversion core with residue amplification and digital error correction, enabling high-speed operation while minimizing die area and power. Its self-calibration module determines per-stage analog errors and stores correction coefficients in on-chip RAM for real-time digital compensation.
Analog inputs are converted to differential signals internally to suppress crosstalk and power-supply noise; the VIN and VREF inputs are single-ended but drive a fully differential conversion path. Reference buffering, separate analog/digital ground routing (AGND/DGND), and dedicated VD I/O supply (2.7–5 V) enable robust interfacing with mixed-signal systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - guarantees no missing codes and supports precise amplitude quantization in measurement systems. |
| Conversion Rate | 5 MSPS minimum - enables real-time sampling of baseband signals up to 100 MHz full-power bandwidth. |
| SNR | 68 dB typical at 2.5 MHz input - ensures >11-bit effective dynamic range for clean signal capture in imaging and digitizer applications. |
| DNL | ±0.35 LSB typical - maintains monotonicity and minimizes code-dependent distortion in linear control loops. |
| ENOB | 10.9 bits typical - reflects actual usable resolution after including noise and distortion contributions. |
| Analog Input Range | 0 to 2 VPP - matches standard low-voltage reference sources (e.g., LM4041CIM3-ADJ) without external scaling. |
| Supply Voltage | +4.75 V to +5.25 V - tolerates standard 5 V rail variation while maintaining full specification compliance. |
| Power Consumption | 105 mW typical at 5 MHz - balances speed and thermal footprint for compact embedded data acquisition modules. |
Pinout & Package
The ADC12081CIVTX/NOPB is housed in a 32-lead LQFP (Low-Profile Quad Flat Package) with 0.8 mm lead pitch, optimized for surface-mount assembly and thermal dissipation in industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Analog signal input | Accepts 0–2 VPP single-ended input; referenced to VINCOM; requires low-impedance source to preserve AC performance. |
| VREF | Reference voltage input | Drives internal reference buffer; must be 1.8–2.2 V stable source, bypassed with 0.01 µF ceramic to quiet AGND. |
| VRP / VRM / VRN | Reference output voltages | Internal reference node taps - each must be bypassed with 0.1 µF ceramic capacitor to analog ground; no external loading permitted. |
| CLOCK | Sample clock input | TTL-compatible; 0.5–5 MHz operation; series 100 Ω resistor required near pin to minimize jitter and reflections. |
| CAL | Calibration request | Active-High pulse ≥3 clock cycles initiates 4000-cycle auto-calibration; recommended after power-up or >50°C temperature shift. |
| PD | Power-down control | Active-High entry into <15 mW standby mode; exit requires tPD = 4000 clock cycles and post-exit recalibration for full accuracy. |
| OE | Output enable | Active-Low control of 12-bit D0–D11 outputs; high state places outputs in high-impedance for bus sharing or reduced switching noise. |
| OR | Out-of-range indicator | Logic-High when VIN < 0 V or VIN > VREF - provides immediate overvoltage/undervoltage fault detection without software polling. |
| READY | Device ready status | Logic-High when calibrated and active; goes low during CAL or PD cycles - synchronizes system initialization sequences. |
| D0–D11 | Digital output data | 12-bit straight-binary, MSB = D11 (pin 27), LSB = D0 (pin 14); load ≤50 pF; VD I/O supply selectable 2.7–5 V for logic-level compatibility. |
| VA / VD / VD I/O | Power supplies | VA and VD share +5 V rail but require independent 0.1 µF + 5–10 µF bypassing; VD I/O powers output drivers separately for noise isolation. |
| AGND / DGND / DGND I/O | Ground returns | Three isolated ground pins: AGND (analog), DGND (digital core), DGND I/O (output driver return) - must tie together near package per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Self-calibrating pipeline architecture | Performs full internal calibration in 4000 clock cycles to correct gain, offset, and stage-matching errors - eliminates need for external calibration hardware. |
| Integrated sample-and-hold + reference buffer | Removes requirement for external S/H amplifier and reference buffer ICs - reduces BOM count and board space in compact front-end designs. |
| Dual-supply output driver (VD I/O) | Supports 2.7–5 V output supply independently from core VD - enables direct interface to 3 V or 5 V logic without level shifters or added noise. |
| Separate analog/digital ground structure | AGND, DGND, and DGND I/O pins physically isolated - enforces clean partitioning of analog and digital return paths to maintain 68 dB SNR. |
| Over-range and ready status outputs | OR and READY pins provide real-time hardware flags - simplify firmware design by offloading input validity and device readiness monitoring. |
| −40°C to +85°C extended commercial operation | Qualified across full temperature range with guaranteed INL (±1.7 LSB max), DNL (±0.75 LSB max), and SNR (65 dB min) - suitable for industrial environments. |
Applications
| PC-Based Data Acquisition | Waveform Digitizer |
|---|---|
Use Scenario: High-speed analog signal capture from sensors, function generators, or test equipment into Windows/Linux host via parallel or FPGA-linked interface. IC Role / Device Role / Timing Role: Primary ADC front end; converts continuous analog waveforms into time-aligned 12-bit samples synchronized to external CLOCK. Use Value: 5 MSPS throughput and 100 MHz bandwidth support multi-channel simultaneous sampling without aliasing in oscilloscope-grade instruments. | Use Scenario: Digitizing transient electrical events (e.g., pulse response, ESD testing, RF envelope) with microsecond-scale timing fidelity. IC Role / Device Role / Timing Role: Core sampling engine; uses internal S/H and pipeline latency of 10.25 clock cycles to ensure deterministic aperture delay (<3.5 ns) and minimal jitter. Use Value: ±0.35 LSB DNL and 68 dB SNR preserve waveform shape integrity for accurate post-processing and FFT analysis. |
| Image Processing Front End | Scanner Analog Interface |
Use Scenario: Converting analog video or line-scan sensor outputs (e.g., CCD, CIS) in medical imaging, machine vision, or document scanning systems. IC Role / Device Role / Timing Role: Pixel-rate ADC; interfaces directly to analog sensor chain with 0–2 VPP input range matching typical photodiode amplifier outputs. Use Value: Internal reference buffer and single-supply operation eliminate external op-amps and dual-rail supplies - reducing component count and power in portable imagers. | Use Scenario: Capturing reflected light intensity from moving document surfaces in flatbed or sheet-fed scanners. IC Role / Device Role / Timing Role: Precision analog digitizer; OR output flags saturation during rapid reflectance transitions; READY confirms calibration stability before scan start. Use Value: Self-calibration compensates for thermal drift during long-duration scans, maintaining consistent grayscale linearity across operating temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8320UB | 16-bit, 1 MSPS SAR ADC; no internal S/H or reference buffer; requires external REF and clock conditioning. | Better DC precision and lower power, but insufficient speed for >2 MSPS real-time acquisition. | Select when resolution >12 bits and sampling rate <1 MSPS suffice; not suitable as drop-in replacement. |
| MAX1186ECM+ | 12-bit, 40 MSPS pipeline ADC; higher speed, wider input range (0–4 V), but consumes 320 mW and requires external reference. | Supports higher-frequency IF sampling but demands more board area, cooling, and supply filtering. | Choose for RF/IF digitization above 10 MHz; ADC12081CIVTX/NOPB remains optimal for cost-sensitive 5 MSPS systems with integrated reference needs. |
Compared with ADS8320UB and MAX1186ECM+, the ADC12081CIVTX/NOPB uniquely balances 5 MSPS speed, integrated reference buffering, self-calibration, and sub-110 mW power - making it the most compact, low-complexity solution for mid-speed industrial digitization where external component count and thermal management are critical constraints.
Availability
ADC12081CIVTX/NOPB is available at Aetrix Electronics and suitable for PC-based data acquisition, waveform digitizers, and image processing front ends requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADC12081CIVTX/NOPB 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, embedded processing, and high-performance data converters for industrial, automotive, and communications markets.
The ADC12081CIVTX/NOPB belongs to TI's legacy high-speed pipeline ADC family, designed specifically for cost-sensitive, medium-bandwidth digitization in instrumentation, imaging, and communications infrastructure where integration, self-calibration, and single-supply operation are essential.
FAQ
What is the maximum clock frequency supported by the ADC12081CIVTX/NOPB?
The ADC12081CIVTX/NOPB supports a maximum clock frequency of 5 MHz, with a minimum of 0.5 MHz. At 5 MHz, it achieves its rated 5 MSPS conversion rate and specified AC performance (e.g., 68 dB SNR, 10.9-bit ENOB). Operating outside this range degrades timing margins and may violate setup/hold requirements for internal pipeline stages.
Does the ADC12081CIVTX/NOPB require an external reference voltage source?
Yes, the ADC12081CIVTX/NOPB requires an external reference voltage applied to the VREF pin, within 1.8 V to 2.2 V. While it includes an internal reference buffer amplifier, the reference itself must be supplied externally - TI recommends the LM4041CIM3-ADJ for optimal stability and noise performance. The device does not contain an internal voltage reference.
How does calibration affect the accuracy of the ADC12081CIVTX/NOPB over temperature?
Calibration in the ADC12081CIVTX/NOPB measures and corrects gain, offset, and stage nonlinearity errors across the −40°C to +85°C range. Post-calibration, INL remains ≤±1.7 LSB and DNL ≤±0.75 LSB over temperature. TI recommends calibration every 10 seconds after power-up or after >50°C ambient change to maintain datasheet accuracy.
Can the ADC12081CIVTX/NOPB interface directly with 3 V logic systems?
Yes, the ADC12081CIVTX/NOPB supports direct 3 V logic interfacing via its VD I/O pin, which accepts 2.7 V to 5 V. When powered at 3 V, its D0–D11 outputs meet TTL/CMOS voltage thresholds (VOH ≥ 2.4 V, VOL ≤ 0.4 V) while reducing switching noise and total power consumption - no level shifter is needed.
What is the purpose of the VRP, VRM, and VRN pins on the ADC12081CIVTX/NOPB?
The VRP, VRM, and VRN pins on the ADC12081CIVTX/NOPB are internal reference voltage node taps - VRP is positive, VRM is midpoint, and VRN is negative. They must each be bypassed with a 0.1 µF ceramic capacitor to quiet analog ground. These pins are not for external connection or loading; their sole function is to stabilize internal reference distribution and reduce noise coupling in the conversion core.
ADC12081CIVTX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-LQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 5M
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- Parallel
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- Pipelined
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -20°C ~ 75°C
- Supplier Device Package:
- 32-TQFP (7x7)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC12081CIVTX/NOPB FAQ
1.How can I place an order for ADC12081CIVTX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC12081CIVTX/NOPB 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 ADC12081CIVTX/NOPB reliable?
The price and inventory of ADC12081CIVTX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC12081CIVTX/NOPB is usually 5 days.
3.What payment methods are accepted for ADC12081CIVTX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC12081CIVTX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADC12081CIVTX/NOPB?
ADC12081CIVTX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC12081CIVTX/NOPB 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 ADC12081CIVTX/NOPB?
For technical support, including ADC12081CIVTX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC12081CIVTX/NOPB requirements.
6.How does Aetrix verify that ADC12081CIVTX/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC12081CIVTX/NOPB 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 ADC12081CIVTX/NOPB meets industry standards.
7.What is the process for return or replacement of ADC12081CIVTX/NOPB?
All ADC12081CIVTX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC12081CIVTX/NOPB, 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 ADC12081CIVTX/NOPB part is unused and in its original packaging.
Return procedure for ADC12081CIVTX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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