Texas Instruments ADC081500CIYB/NOPB

Overview

ADC081500CIYB/NOPB from Texas Instruments is an 8-bit, 1.5 GSPS analog-to-digital converter with folding-interpolating architecture, internal sample-and-hold, LVDS DDR/SDR outputs, and guaranteed no missing codes over −40°C to +85°C. It delivers 7.3 ENOB at 748 MHz input and 10⁻¹⁸ bit error rate, targeting RF sampling in direct-conversion receivers and high-speed test instrumentation.

For engineers reviewing the ADC081500CIYB/NOPB datasheet, ADC081500CIYB/NOPB pinout, ADC081500CIYB/NOPB application, or ADC081500CIYB/NOPB equivalent, key selection considerations include its 1.5 GSPS real-time sampling capability, differential 870 mV_P-P full-scale input range, 1.2 W typical power consumption at 1.9 V, and 128-lead HLQFP thermal pad package with dual LVDS output buses (D and Dd).

Technical Context

The ADC081500CIYB/NOPB employs a fully differential comparator design and self-calibrating folding-interpolating architecture to maintain flat dynamic performance beyond Nyquist, enabling accurate digitization of wideband RF signals up to 748 MHz. Its internal sample-and-hold operates on the falling edge of CLK±, with aperture jitter specified at 0.4 ps RMS.

It features a 1:2 demultiplexer that routes samples alternately to two independent LVDS buses-non-delayed (D0–D7) and one-cycle delayed (Dd0–Dd7)-each operating at 750 MSPS in SDR mode or 375 MSPS in DDR mode. Output formatting is offset binary, with programmable LVDS output offset voltage (0.8–1.2 V) and duty-cycle-corrected sample clock generation.

Key Specifications

Pinout & Package

The ADC081500CIYB/NOPB is housed in a 128-lead thermally enhanced exposed-pad HLQFP (Heat Sink Low-Profile Quad Flat Package), requiring soldering of the backside thermal pad to the PCB ground plane for rated thermal performance (θ_J-PAD = 2.8°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADC081500CIYB/NOPB, ADC08D1500CIYB offers identical electrical and thermal performance in alternate packaging, while ADS54J60IRGC trades 600 MSPS lower sample rate for 6-bit resolution gain and serial interface simplification - making it suitable for bandwidth-constrained, SNR-critical applications rather than ultra-wideband RF capture.

Availability

ADC081500CIYB/NOPB is available at Aetrix Electronics and suitable for direct RF sampling receivers, high-speed test instrumentation, satellite communications front-ends, and digital oscilloscope designs requiring stable component supply with long-term industrial temperature support.

Supply support for ADC081500CIYB/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 conversion technologies.

The ADC081500CIYB/NOPB belongs to TI's high-speed ADC portfolio designed for RF-sampling architectures in communications infrastructure, test equipment, and defense electronics - emphasizing low jitter, wide full-power bandwidth, and robust industrial operation.

FAQ

What is the maximum input clock frequency supported by the ADC081500CIYB/NOPB?

The ADC081500CIYB/NOPB supports a maximum input clock frequency of 1.7 GHz, with guaranteed operation at 1.5 GSPS across the full industrial temperature range (−40°C to +85°C). The device uses the falling edge of the differential CLK± input for sampling, and requires 0.4–2.0 V_P-P amplitude with 20–80% duty cycle. At 1.5 GHz, it achieves 7.3 ENOB at 748 MHz input and maintains 10⁻¹⁸ bit error rate - critical for reliable RF digitization in ADC081500CIYB/NOPB-based systems.

How does the 1:2 demultiplexer affect data timing in the ADC081500CIYB/NOPB?

The ADC081500CIYB/NOPB's internal 1:2 demultiplexer splits samples between two LVDS buses: non-delayed (D0–D7) and one-clock-cycle delayed (Dd0–Dd7). In SDR mode, DCLK runs at 750 MHz and each bus carries 750 MSPS; in DDR mode, DCLK runs at 375 MHz and each bus carries 750 MSPS via double-data-rate transitions. This architecture halves per-lane data rate, easing FPGA I/O timing closure. Pipeline latency differs by one clock cycle between buses - a key timing constraint when reconstructing interleaved samples in ADC081500CIYB/NOPB applications.

Can the ADC081500CIYB/NOPB operate with AC-coupled analog inputs?

Yes, the ADC081500CIYB/NOPB supports AC-coupled analog inputs using external series capacitors. When AC-coupled, the VCMO pin must be grounded, and the full-scale differential input range is set by the FSR/ECE pin (650–950 mV_P-P). The device's internal sample-and-hold handles common-mode rejection, and input capacitance is specified at 1.6 pF per pin. For optimal performance, source impedance should be 100 Ω differential, and layout must minimize imbalance - all validated in ADC081500CIYB/NOPB reference designs for direct RF sampling.

What is the purpose of the CalRun pin on the ADC081500CIYB/NOPB?

The CalRun pin on the ADC081500CIYB/NOPB is an open-drain output that asserts logic high during active self-calibration cycles, providing hardware visibility into calibration status. It remains low otherwise. This signal can synchronize external logic or trigger diagnostic logging. Calibration is initiated by an 80-cycle low/high pulse on the CAL pin and takes ~140,000 input clock cycles. Because DCLK outputs are disabled during calibration, CalRun helps avoid data capture errors - a critical timing safeguard in production ADC081500CIYB/NOPB systems requiring periodic recalibration.

Does the ADC081500CIYB/NOPB support both SDR and DDR LVDS output modes?

Yes, the ADC081500CIYB/NOPB supports both Single Data Rate (SDR) and Double Data Rate (DDR) LVDS output modes, selected via the OutEdge/DDR/SDATA pin (Pin 4). In SDR mode, DCLK runs at half the input clock rate (e.g., 750 MHz for 1.5 GHz CLK), and data transitions occur on one DCLK edge. In DDR mode, DCLK runs at one-quarter the input clock rate (e.g., 375 MHz), and data transitions occur on both edges. Output amplitude and common-mode voltage remain configurable - a flexible interface option confirmed in ADC081500CIYB/NOPB characterization reports.