Texas Instruments ADC12040CIVY/NOPB

Overview

ADC12040CIVY/NOPB from Texas Instruments is a monolithic 12-bit, 40 MSPS pipeline analog-to-digital converter with internal sample-and-hold, single +5V supply operation, 2.35V–5V output-compatible digital interface, and industrial temperature range (−40°C to +85°C). It delivers 69 dB SNR at 10 MHz input and consumes 340 mW typical at full speed - used in ultrasound imaging front-ends and cellular base station receivers.

For engineers reviewing the ADC12040CIVY/NOPB datasheet, ADC12040CIVY/NOPB pinout, ADC12040CIVY/NOPB application, or ADC12040CIVY/NOPB equivalent, key selection criteria include its differential input architecture, 6-clock-cycle conversion latency, on-chip reference buffer, power-down mode (40 mW), and LQFP-32 package compatibility with ADC12010/ADC12020.

Technical Context

The ADC12040CIVY/NOPB employs a differential pipeline architecture with digital error correction and an integrated sample-and-hold to achieve 11.2-bit ENOB at 10 MHz while minimizing die size and power. Its aperture jitter is 1.2 ps rms, enabling high-fidelity signal capture in demanding RF sampling applications.

It supports both differential and single-ended analog inputs, with VREF configurable from 1.0 V to 2.2 V and common-mode voltage (VCM) adjustable from 0.5 V to 3.0 V. Output data is offset binary, synchronized to the rising edge of CLK, with 6-cycle pipeline latency and TRI-STATE enable via OE.

Key Specifications

Pinout & Package

The ADC12040CIVY/NOPB is housed in a 32-lead LQFP package (7 mm × 7 mm, 0.8 mm pitch) with exposed thermal pad. Pin assignments are validated per TI SNAS135G datasheet Rev. March 2013.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADC12020CIVY/NOPB, the ADC12040CIVY/NOPB doubles throughput for wideband signal capture without layout change; versus ADS5271IPFP, it offers higher resolution and integrated reference at the cost of single-channel operation and larger footprint.

Availability

ADC12040CIVY/NOPB is available at Aetrix Electronics and suitable for ultrasound imaging systems, cellular infrastructure equipment, and HDTV tuner designs requiring stable component supply, long-term production continuity, and industrial-temperature-grade performance.

Supply support for ADC12040CIVY/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 ADC12040CIVY/NOPB belongs to TI's high-speed precision ADC product line, engineered for RF-sampling and communication receiver applications demanding low jitter, high SNR, and robust DC accuracy in single-supply systems.

FAQ

What is the absolute maximum clock frequency for ADC12040CIVY/NOPB?

The ADC12040CIVY/NOPB supports a maximum clock frequency of 50 MHz per the datasheet AC Electrical Characteristics table. However, guaranteed 12-bit performance with all specifications met is specified at 40 MSPS minimum. Operating above 40 MHz may reduce SNR, SFDR, or increase DNL beyond limits - design validation at 50 MHz is required for each application. The ADC12040CIVY/NOPB remains functional but not fully characterized beyond 40 MSPS.

Does ADC12040CIVY/NOPB require external reference buffering?

No. The ADC12040CIVY/NOPB integrates an on-chip reference buffer that converts the single-ended VREF input into a differential reference for internal circuitry. This eliminates the need for an external op-amp buffer, simplifying layout and reducing component count. The datasheet explicitly states "on-chip reference buffer" as a key feature and specifies VREF as a high-impedance input requiring only a 0.1 µF bypass capacitor - confirming internal buffering. The ADC12040CIVY/NOPB thus operates with minimal external components on the reference path.

Can ADC12040CIVY/NOPB operate with a 3.3 V digital I/O supply?

No - the ADC12040CIVY/NOPB digital outputs (D0–D11) are powered by the VDR supply, which must be between +2.35 V and the VA/VD voltage (i.e., up to +5.25 V). While VDR can be set to 3.3 V, the device itself requires VA and VD at +4.75 V to +5.25 V; it does not support 3.3 V core logic. Therefore, interfacing with 3.3 V FPGA or ASIC inputs is possible *only* by setting VDR = 3.3 V and ensuring output logic levels meet VIH/VIL thresholds of the receiving device - but the ADC12040CIVY/NOPB's internal analog and digital core remain 5 V-only.

What is the purpose of the DR GND pin on ADC12040CIVY/NOPB?

The DR GND pin is the dedicated ground return for the VDR-supplied digital output drivers (D0–D11). Per the datasheet Layout and Grounding guidelines, DR GND must connect to system ground *but not* in close proximity to DGND or AGND - preventing digital switching noise from coupling into analog or core digital supplies. This separation maintains signal integrity for the 12-bit output bus and avoids degrading SNR or introducing timing jitter. The ADC12040CIVY/NOPB uses this three-ground architecture (AGND, DGND, DR GND) to isolate noise sources across functional domains.

Is ADC12040CIVY/NOPB pin-compatible with ADC12L066?

Yes - the datasheet explicitly lists ADC12040CIVY/NOPB as pin-compatible with ADC12L066, along with ADC12010, ADC12020, and ADC12L063. All share the same 32-lead LQFP package, identical pin functions (e.g., VIN+, VIN−, CLK, OE, PD, D0–D11), and compatible voltage ranges for analog and digital supplies. However, performance differs: ADC12L066 is a 12-bit, 65 MSPS device with different dynamic specs (e.g., higher power, different SFDR), so PCB reuse is possible but firmware and layout optimization may be needed for full-speed operation.