Texas Instruments ADS6243IRGZT

Overview

ADS6243IRGZT from Texas Instruments is a dual-channel, 14-bit, 80 MSPS analog-to-digital converter with serialized LVDS outputs, simultaneous sample-and-hold architecture, and internal reference. It delivers 74.2 dBFS SINAD at 10 MHz input and 92 dBc SFDR (0 dB gain), operating from 3.3-V analog/digital supplies in a 48-pin QFN package. It is used in base-station IF receivers requiring high dynamic range and compact serial interface density.

For engineers reviewing the ADS6243IRGZT datasheet, ADS6243IRGZT pinout, ADS6243IRGZT application, or ADS6243IRGZT equivalent, key selection considerations include its 80 MSPS sampling rate, 2-wire DDR LVDS interface, programmable coarse/fine gain, internal/external reference flexibility, and industrial temperature range (–40°C to 85°C).

Technical Context

The ADS6243IRGZT implements a dual 14-bit pipeline ADC core with simultaneous sampling per channel, integrated PLL for bit clock generation, and digital encoder/serializer supporting both 1-wire and 2-wire LVDS output modes. Its 2-wire DDR interface halves data rate versus 1-wire, limiting serialized output to <1 Gbps.

It supports configurable data format (MSB/LSB first, 2's complement/offset binary), programmable fine gain (0–6 dB in 1-dB steps), and coarse gain (0 or 3.5 dB). Internal reference provides 1.0 V to 2.0 V range; external reference mode accepts 1.45–1.55 V common-mode voltage.

Key Specifications

Pinout & Package

ADS6243IRGZT is housed in a 48-pin QFN package (7 mm × 7 mm) with exposed thermal pad. Pin functions are defined per TI SLAS542B Rev. December 2013.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, 14-bit ADC applications.

Compared with ADS6244IRGZT and ADS6223IRGZT, ADS6243IRGZT uniquely balances 14-bit precision, 80 MSPS throughput, and 350 mW/channel efficiency-making it the optimal fit for mid-tier IF sampling where thermal headroom and dynamic range are both constrained.

Availability

ADS6243IRGZT is available at Aetrix Electronics and suitable for base-station IF receivers, medical ultrasound front-ends, and test equipment requiring stable component supply, long-term production continuity, and industrial-temperature-grade performance.

Supply support for ADS6243IRGZT 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, communications, and medical markets.

The ADS62xx family-including ADS6243IRGZT-is designed specifically for high-density, high-dynamic-range communication infrastructure applications requiring dual-channel synchronization, LVDS serialization, and flexible reference/gain configuration.

FAQ

What is the maximum sampling rate supported by the ADS6243IRGZT?

The ADS6243IRGZT supports a maximum sampling rate of 80 MSPS, as specified across the full industrial temperature range (–40°C to +85°C). This rate is validated for all electrical characteristics including SINAD, SFDR, and power consumption. At this rate, the device achieves 74.2 dBFS SINAD and 92 dBc SFDR at 10 MHz input frequency with 0 dB coarse gain. The ADS6243IRGZT is part of the pin-compatible ADS624X family, where ADS6242IRGZT (65 MSPS), ADS6244IRGZT (105 MSPS), and ADS6245IRGZT (125 MSPS) offer adjacent speed grades.

Does the ADS6243IRGZT require external decoupling capacitors for its internal reference?

No, the ADS6243IRGZT does not require external decoupling capacitors for its internal reference. As stated in the TI SLAS542B datasheet, the device integrates internal reference circuitry that operates without external decoupling components. This simplifies layout and reduces bill-of-materials count. When using external reference mode, however, proper bypassing of the reference input (1.45–1.55 V common-mode) is required per standard analog design practices. The internal reference provides stable 1.0 V to 2.0 V range with ±2 mV typical error across temperature.

How many LVDS data pairs does the ADS6243IRGZT use in 2-wire interface mode?

In 2-wire interface mode, the ADS6243IRGZT uses four LVDS differential data pairs: DA0_P/DA0_M and DA1_P/DA1_M for Channel A, and DB0_P/DB0_M and DB1_P/DB1_M for Channel B. Each pair carries time-interleaved bits of the 14-bit sample, enabling DDR serialization and halving the effective data rate versus 1-wire mode. This configuration supports bit rates below 1 Gbps, easing FPGA receiver design. The ADS6243IRGZT also provides dedicated DCLKP/DCLKM and FCLKP/FCLKM LVDS outputs for bit and frame clock distribution.

Can the ADS6243IRGZT operate with an external reference, and what voltage range is supported?

Yes, the ADS6243IRGZT supports external reference operation. In this mode, the VCM pin accepts a precise 1.45 V to 1.55 V common-mode voltage, which establishes the reference midpoint for the analog inputs. This range is strictly defined in the Recommended Operating Conditions table of the datasheet and must be maintained for guaranteed performance. The SEN pin controls reference selection: at (3/8)LVDD or LVDD, internal reference is active; at 0 V or (3/8)LVDD with appropriate configuration, external reference mode engages. No additional external reference IC is required-the ADS6243IRGZT interfaces directly to a stable 1.5 V source.

What is the power consumption of the ADS6243IRGZT at its rated 80 MSPS sampling rate?

At 80 MSPS, the ADS6243IRGZT consumes 350 mW per channel (700 mW total), with 155 mA from AVDD (analog supply) and 55 mA from LVDD (LVDS buffer supply) at 3.3 V. This value is specified in Table 2 (Performance Summary) and confirmed in the Electrical Characteristics section of the SLAS542B datasheet. Power scales linearly with sampling rate: at 65 MSPS (ADS6242IRGZT), it drops to 315 mW/channel; at 105 MSPS (ADS6244IRGZT), it rises to 405 mW/channel. The device also supports individual channel power-down (via PDNA/PDNB pins) to reduce idle power to 150 mW total.