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Texas Instruments ADC12DS105CISQE/NOPB
- Part No.:
- ADC12DS105CISQE/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 60-WFQFN Exposed Pad
- Datasheet:
-
ADC12DS105CISQE/NOPB.pdf
- Description:
- IC ADC 12BIT PIPELINED 60WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,549
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Product details
Overview
ADC12DS105CISQE/NOPB from Texas Instruments is a dual-channel, 12-bit, 105 MSPS analog-to-digital converter with serial LVDS outputs, differential pipelined architecture, on-chip sample-and-hold, and integrated clock duty cycle stabilizer. It operates from a single +3.0V or +3.3V supply, delivers 68.5 dBFS SNR at 240 MHz input, and targets high-speed IF sampling in wireless base station receivers.
For engineers reviewing the ADC12DS105CISQE/NOPB datasheet, ADC12DS105CISQE/NOPB pinout, ADC12DS105CISQE/NOPB application, or ADC12DS105CISQE/NOPB equivalent, key selection considerations include dual-channel LVDS serialization latency (7.5–9 clock cycles), 1 GHz full-power bandwidth, 1 W typical power consumption, 2 VP-P differential input range, and support for both offset binary and 2's complement output formats with selectable duty-cycle stabilization.
Technical Context
The ADC12DS105CISQE/NOPB implements a 12-bit pipelined ADC core per channel with digital error correction and uses a DLL-based timing generation block to synchronize sampling and LVDS serialization. Its dual-lane LVDS interface supports configurable word alignment (WAM) and lane selection (DLC), enabling flexible data packing across SD0/SD1 pairs per channel.
It integrates a stable 1.2 V internal reference (±18 ppm/°C tempco) and accepts external 1.2 V references; analog inputs are biased at 1.5 V common mode (VCMO), with dedicated VRP/VRN pins for reference buffering. The OF/DCS pin selects between offset binary/2's complement output coding and enables/disables the clock duty cycle stabilizer based on voltage threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits with no missing codes - guarantees monotonicity and full code coverage for precision measurement systems. |
| Sampling Rate | 105 MSPS maximum in dual-lane mode - enables Nyquist-sampled capture of signals up to 52.5 MHz or undersampled IF signals beyond 200 MHz. |
| SNR @ 240 MHz | 68.5 dBFS typical - defines effective noise floor for high-frequency signal digitization in communications receivers. |
| Full Power Bandwidth | 1 GHz typical - supports accurate digitization of fast-rising transients and wideband modulated signals without amplitude roll-off. |
| Power Consumption | 1 W typical at 105 MSPS - balances performance and thermal management in dense RF front-end PCB layouts. |
| Differential Input Range | 2 VP-P full-scale - matches standard RF transformer and balun output levels without external gain scaling. |
| LVDS Output Interface | Serial differential outputs (SD0_A/B, SD1_A/B, FRAME, OUTCLK) - reduces PCB trace count by 50% vs. parallel interfaces and improves noise immunity in mixed-signal environments. |
Pinout & Package
ADC12DS105CISQE/NOPB is housed in a 60-pin WQFN package (9 mm × 9 mm × 0.8 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments follow TI's NKA0060A footprint and support separate analog (AGND), digital driver (DRGND), and power domains (VA, VDR) to minimize coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINA+/VINA−, VINB+/VINB− | Differential analog inputs | Accept 2 VP-P differential signals centered at 1.5 V common mode; require local 0.1 µF bypassing to AGND. |
| CLK | Master sampling clock input | Rising-edge triggered; supports 52.5–105 MHz in dual-lane mode; jitter sensitivity defined by 0.1 ps rms aperture jitter. |
| SD0_A+/−, SD1_A+/−, SD0_B+/−, SD1_B+/− | Serialized LVDS data outputs | Carry time-interleaved or lane-split 12-bit samples; require 100 Ω differential termination at receiver end. |
| OUTCLK+/−, FRAME+/− | LVDS timing outputs | Provide bit-synchronous clock and word-aligned frame strobe; OUTCLK edge aligns to data transitions per LVDS timing spec. |
| OF/DCS, WAM, DLC, PD_A/PD_B | Configuration control inputs | Set output format, duty-cycle stabilization, lane mode, and per-channel power-down without SPI interface. |
| SPI_EN, SCSb, SCLK, SDI, SDO | Serial peripheral interface | Enable register-level configuration (e.g., gain, offset, test modes); operate up to 10.5 MHz with 5 ns setup/hold timing. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel 105 MSPS LVDS serialization | Reduces interconnect density by eliminating 24+ parallel data lines per channel while maintaining deterministic timing via embedded clock/frame signals. |
| Selectable output coding & duty-cycle stabilization | OF/DCS pin configures 2's complement/offset binary format and enables internal DCS circuit to maintain performance across 30/70% input clock duty cycles. |
| On-chip 1.2 V reference with ±18 ppm/°C stability | Eliminates need for external reference IC in cost-sensitive designs; VRP/VRN pins allow buffered reference distribution to external circuitry. |
| Per-channel power-down control (PD_A/PD_B) | Enables dynamic power scaling-disabling one channel cuts total power by ~40% while preserving full functionality on the active channel. |
| Integrated overrange detection (ORA/ORB) | CMOS-level flags indicate saturation events in real time, enabling automatic gain control (AGC) loop response within one sample period. |
Applications
| High IF Sampling Receivers | Wireless Base Station Receivers |
|---|---|
Use Scenario: Digitizing 180–300 MHz IF signals from quadrature downconverters in macrocell BTS front-ends. IC Role / Device Role / Timing Role: Dual-channel simultaneous sampling ADC providing time-aligned I/Q data streams to FPGA-based digital downconverters. Use Value: 68.5 dBFS SNR and 83 dBFS SFDR at 240 MHz enable high-order QAM demodulation; LVDS serialization simplifies routing across backplane FPGAs. | Use Scenario: Capturing multi-carrier WCDMA/LTE signals in remote radio heads with tight SWaP constraints. IC Role / Device Role / Timing Role: High-speed digitizer interfacing directly to RF transceivers via transformer-coupled inputs and LVDS links to baseband processors. Use Value: 1 GHz FPBW supports wide instantaneous bandwidth; per-channel power-down allows TDD mode optimization with <33 mW standby power. |
| Test and Measurement Equipment | Communications Instrumentation |
Use Scenario: Embedded digitizer in portable spectrum analyzers requiring >100 MHz real-time bandwidth and low power. IC Role / Device Role / Timing Role: Core ADC engine capturing burst-mode signals with precise timestamping via FRAME/OUTCLK synchronization. Use Value: 0.1 ps rms aperture jitter ensures <0.01° phase error in coherent measurements; dual-lane mode eases FPGA resource utilization. | Use Scenario: Signal integrity validation in high-speed serial link testers analyzing PAM4 eye diagrams. IC Role / Device Role / Timing Role: Wideband acquisition frontend feeding real-time equalization and BER analysis engines. Use Value: 2 VP-P input range matches probe amplifier outputs; 12-bit resolution resolves fine amplitude gradations critical for jitter decomposition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, 12-bit, 100+ MSPS ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADC12DJ3200IRSBT | Single-package dual 12-bit 3.2 GSPS ADC with JESD204B v2.0 interface; 5× higher sampling rate but 3× higher power (3.5 W). | Targets mmWave 5G NR and radar where >1 GHz instantaneous bandwidth is required; not drop-in compatible due to JESD204B protocol and pinout. | Choose ADC12DJ3200IRSBT only when sampling rate >1 GSPS is mandatory and JESD204B infrastructure exists. |
| AD9680BCPZ-500 | Dual 14-bit 500 MSPS ADC with parallel CMOS and JESD204B outputs; higher resolution but lower SNR (69.5 dBFS @ 170 MHz) and no integrated DCS. | Preferred for applications needing >12-bit ENOB at lower frequencies (<100 MHz); requires external clock conditioning for wide-duty-cycle tolerance. | Choose AD9680BCPZ-500 when 14-bit linearity outweighs LVDS serialization benefits and external clock cleanup is acceptable. |
Compared with ADC12DS105CISQE/NOPB, ADC12DJ3200IRSBT offers vastly higher speed at significant power and interface complexity cost, while AD9680BCPZ-500 trades LVDS simplicity for higher resolution and parallel/JESD flexibility-neither is pin-compatible, but both serve adjacent high-speed digitization tiers.
Availability
ADC12DS105CISQE/NOPB is available at Aetrix Electronics and suitable for high IF sampling receivers, wireless base station receivers, and test and measurement equipment requiring stable component supply, long-term industrial temperature support (−40°C to +85°C), and consistent WQFN package availability.
Supply support for ADC12DS105CISQE/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, with decades of innovation in precision and high-speed ADC architectures.
The ADC12DS105CISQE/NOPB belongs to TI's high-speed pipeline ADC product line, designed specifically for demanding communications and instrumentation applications requiring dual-channel synchronization, LVDS serialization, and robust operation across industrial temperatures.
FAQ
What is the minimum clock frequency supported by ADC12DS105CISQE/NOPB in dual-lane mode?
The ADC12DS105CISQE/NOPB supports a minimum clock frequency of 52.5 MHz in dual-lane mode, as specified in the Timing and AC Characteristics table. This allows flexible system clocking while maintaining full 105 MSPS throughput via lane interleaving. Operation below this frequency may result in undefined timing behavior or loss of specification compliance. The ADC12DS105CISQE/NOPB must be configured for dual-lane mode using the DLC pin to achieve this minimum.
Does ADC12DS105CISQE/NOPB support external reference voltage, and what is the acceptable range?
Yes, ADC12DS105CISQE/NOPB supports an external 1.2 V reference applied to the VREF pin, with a specified range of 1.176 V to 1.224 V (±2%). When using the external reference, the internal 1.2 V reference is disabled, and VREF must be decoupled to AGND with both 0.1 µF and 1 µF low-ESL capacitors. The ADC12DS105CISQE/NOPB does not regulate or buffer external references beyond this voltage window.
How does the OF/DCS pin affect ADC12DS105CISQE/NOPB operation when SPI_EN is asserted?
When SPI_EN is high, the ADC12DS105CISQE/NOPB disables all direct-control pins including OF/DCS, rendering it non-functional for output format or duty-cycle stabilization selection. Configuration must then occur exclusively via the SPI interface (SCSb/SCLK/SDI/SDO). The ADC12DS105CISQE/NOPB datasheet explicitly states that OF/DCS has "no effect" under SPI_EN assertion, ensuring deterministic register-based control during firmware-driven initialization.
What is the conversion latency of ADC12DS105CISQE/NOPB in dual-lane word-aligned mode?
In dual-lane word-aligned mode (WAM = logic-1), the ADC12DS105CISQE/NOPB exhibits a conversion latency of 9 clock cycles, as confirmed in the Timing and AC Characteristics table. This represents the delay from CLK rising edge (sample instant) to valid data appearing at the LVDS output drivers. The ADC12DS105CISQE/NOPB latency increases by one cycle versus offset mode (8 cycles) due to added alignment logic in the serialization path.
Can ADC12DS105CISQE/NOPB operate with separate analog and digital supply voltages?
Yes, ADC12DS105CISQE/NOPB uses independent supply domains: VA (analog core, +2.7 V to +3.6 V) and VDR (LVDS output drivers, +2.7 V to +3.6 V). While typically both are set to +3.3 V or +3.0 V, they may be independently regulated-TI specifies |VA − VDR| ≤ 0.3 V and mandates separate bypassing (0.1 µF to AGND for VA; 0.1 µF to DRGND for VDR) to prevent noise coupling. The ADC12DS105CISQE/NOPB datasheet confirms this dual-supply capability in the Operating Ratings section.
ADC12DS105CISQE/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 60-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 105M
- Number of Inputs:
- 2
- Input Type:
- Differential
- Data Interface:
- LVDS - Serial
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 2
- Architecture:
- Pipelined
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- Simultaneous Sampling
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 60-WQFN (9x9)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
ADC12DS105CISQE/NOPB FAQ
1.How can I place an order for ADC12DS105CISQE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for ADC12DS105CISQE/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 ADC12DS105CISQE/NOPB reliable?
The price and inventory of ADC12DS105CISQE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADC12DS105CISQE/NOPB is usually 5 days.
3.What payment methods are accepted for ADC12DS105CISQE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADC12DS105CISQE/NOPB transactions.
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4.How is shipping managed for ADC12DS105CISQE/NOPB?
ADC12DS105CISQE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADC12DS105CISQE/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 ADC12DS105CISQE/NOPB?
For technical support, including ADC12DS105CISQE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADC12DS105CISQE/NOPB requirements.
6.How does Aetrix verify that ADC12DS105CISQE/NOPB is sourced from the original manufacturer or authorized distributors?
All ADC12DS105CISQE/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 ADC12DS105CISQE/NOPB meets industry standards.
7.What is the process for return or replacement of ADC12DS105CISQE/NOPB?
All ADC12DS105CISQE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with ADC12DS105CISQE/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 ADC12DS105CISQE/NOPB part is unused and in its original packaging.
Return procedure for ADC12DS105CISQE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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