Texas Instruments THS1209CDA

Overview

THS1209CDA from Texas Instruments is a 12-bit, 8 MSPS pipelined analog-to-digital converter (ADC) with simultaneous dual-channel sampling, 5-V analog single-supply operation, internal 2.5-V reference output (REFOUT), and ±1 LSB differential nonlinearity - optimized for radar front-ends and high-speed DSP acquisition systems.

For engineers reviewing the THS1209CDA datasheet, THS1209CDA pinout, THS1209CDA application, or THS1209CDA equivalent, key selection criteria include its 68 dB SNR at 2 MHz input, glueless DSP interface compatibility, auto-scan mode for two inputs, and TSSOP-32 package with separate analog/digital/buffer supply domains (AVDD/DVDD/BVDD).

Technical Context

The THS1209CDA implements a multistage pipelined ADC architecture with output error correction logic to guarantee no missing codes across 0°C to 70°C. It supports configurable analog input modes - two single-ended channels or one differential channel - selected via control register CR0 bits CHSEL[1:0] and DIFF[1:0].

Conversion is clocked by an external CONV_CLK (up to 8 MHz), with 5-cycle pipeline latency and SYNC-driven channel synchronization in multi-input operation. Internal reference voltages (REFP = 3.5 V, REFM = 1.5 V) yield a 2-V full-scale range; external reference override is supported via REFP/REFM pins when VREF bit in CR0 = 1.

Key Specifications

Pinout & Package

THS1209CDA is housed in a 32-pin TSSOP (DA package) with exposed thermal pad, optimized for mixed-signal layout separation: AVDD/AGND (analog domain), DVDD/DGND (digital I/O), BVDD/BGND (buffer supply), and dedicated REFOUT/REFIN pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8325IPW and THS12082CDAG4, the THS1209CDA uniquely delivers simultaneous dual-channel 8 MSPS sampling in a single TSSOP-32 package with integrated reference and glueless DSP interface - making it optimal for time-critical, space-constrained radar and communications systems where channel alignment and low-latency data flow are mandatory.

Availability

THS1209CDA is available at Aetrix Electronics and suitable for radar signal acquisition, communications front-end design, and industrial motor control applications requiring stable component supply and long-term production continuity.

Supply support for THS1209CDA 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 signal chain solutions.

The THS1209CDA belongs to TI's high-speed data converter product line, engineered for demanding real-time digitization in radar, imaging, and communications infrastructure where speed, linearity, and low power coexist.

FAQ

What is the maximum sampling rate of the THS1209CDA in dual-channel mode?

The THS1209CDA achieves 4 MSPS per channel when configured for two single-ended inputs (AINP and AINM) in auto-scan mode. This is derived from its 8 MSPS total throughput divided across two channels, as specified in Table 1 of the SLAS288B datasheet. The THS1209CDA maintains consistent 5-cycle pipeline latency regardless of channel count, ensuring deterministic timing for real-time systems.

Does the THS1209CDA support differential input configuration?

Yes, the THS1209CDA supports true differential input operation using AINP and AINM pins, delivering 69 dB SNR and –70 dB THD in differential mode per AC specifications. Configuration is controlled by DIFF[1:0] bits in Control Register 0, and the device accepts either internal (3.5 V / 1.5 V) or external reference sources to set the full-scale range.

How does the SYNC signal function in multi-channel operation of the THS1209CDA?

The SYNC output of the THS1209CDA pulses low to indicate when valid data for channel A is present on the D0–D11 bus. In dual-channel mode, SYNC alternates per sample to identify which channel's data is available - enabling precise time-aligned capture without external timestamping. Its timing is defined relative to CONV_CLK edges, with delays of 10 ns (td(CONV_CLKL-SYNCL)) documented in the timing table.

Can the THS1209CDA operate with a 3.3-V digital supply while using 5-V analog supplies?

Yes, the THS1209CDA supports independent supply domains: AVDD = 5 V (analog), DVDD = 5 V (digital I/O), and BVDD = 3.3 V (buffer supply). Its digital interface is explicitly rated for 3-V or 5-V logic compatibility, and DC specs confirm proper operation with BVDD = 3.3 V and DVDD = 5 V simultaneously - enabling mixed-voltage system integration without level shifters.

What is the purpose of the RA0 and RA1 pins on the THS1209CDA?

RA0 and RA1 are multiplexed pins (shared with D10 and D11) used exclusively during control register writes to select between Control Register 0 and Control Register 1. As shown in Table 7 of the datasheet, RA0 = 0/RA1 = 0 addresses CR0, while RA0 = 1/RA1 = 0 addresses CR1 - enabling full configuration of sampling mode, reference selection, power state, and channel routing without additional address lines.