Texas Instruments ADC3561IRSBT

Overview

ADC3561IRSBT from Texas Instruments is a 16-bit, 10-MSPS analog-to-digital converter with –150 dBFS/Hz noise spectral density, ±3 LSB INL, and 1-cycle latency via 1-wire SLVDS interface. It operates from –40°C to +105°C, supports external or internal 1.6-V reference, and delivers 81.9 dBFS SNR at 10 MHz input-targeting precision data acquisition in industrial monitoring and source measurement units.

For engineers reviewing the ADC3561IRSBT datasheet, ADC3561IRSBT pinout, ADC3561IRSBT application, or ADC3561IRSBT equivalent, this page provides verified specifications, validated pin functions, confirmed thermal and timing behavior, and real-world use context for high-fidelity, low-power sampling systems requiring DC accuracy and wideband IF capability.

Technical Context

The ADC3561IRSBT implements a pipelined SAR architecture optimized for ultra-low noise and scalable power: analog supply current is 27 mA (AVDD) and 43 mA (IOVDD) at 10 MSPS, with total dissipation of 77 mW. Its 900-MHz analog input bandwidth enables direct RF sampling up to 450 MHz (Nyquist), while on-chip dual-band digital filtering supports decimation by 2–32 and 32-bit NCO tuning for complex signal processing.

It uses differential SLVDS output with configurable lane count (1-, 1/2-, or 2-wire), delivering 160 MBPS per lane at 10 MSPS. Latency is fixed at one clock cycle for 1-wire mode, and the device features hardware reset, SPI-configurable PDN/SYNC, and dedicated DCLKIN/DCLKP/M for synchronous clock recovery-enabling deterministic timing in closed-loop control and spectrum analysis.

Key Specifications

Pinout & Package

ADC3561IRSBT is housed in a 40-pin WQFN package (5.0 mm × 5.0 mm) with exposed thermal pad. Pin functions are validated per TI SBAS990B Rev B (October 2022).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-resolution, low-power ADC applications.

Compared with ADS8860IDRCT, ADC3561IRSBT offers 10× higher throughput and SLVDS serialization for dense PCB layouts; versus ADC3581IRSBT, it trades 2 bits of resolution for 28 mW lower power and proven stability in extended-temperature industrial deployments.

Availability

ADC3561IRSBT is available at Aetrix Electronics and suitable for high-speed data acquisition, industrial monitoring, source measurement units, power quality analyzers, and spectrum analysis requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADC3561IRSBT 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 and embedded processing technologies, with decades of expertise in precision data converters and signal chain solutions.

The ADC356x family-including ADC3561IRSBT-is designed for ultra-low-noise, low-power, high-linearity sampling in industrial test equipment, communications infrastructure, and scientific instrumentation where DC accuracy and wideband fidelity are co-required.

FAQ

What is the maximum sampling rate supported by the ADC3561IRSBT?

The ADC3561IRSBT is rated for a maximum sampling rate of 10 MSPS, as defined in the device comparison table and electrical characteristics section of the SBAS990B datasheet. This rate is fixed for the ADC3561 variant-unlike the ADC3562 (25 MSPS) or ADC3563 (65 MSPS)-and determines its Nyquist bandwidth, power consumption (77 mW), and timing parameters including aperture jitter (180 fs) and latency (1 clock cycle in 1-wire SLVDS mode). Exceeding 10 MSPS is not supported and may cause undefined behavior.

Does the ADC3561IRSBT support both internal and external voltage references?

Yes, the ADC3561IRSBT supports both internal and external voltage references. An external 1.6-V reference can be applied to the VREF pin with REFGND grounded, yielding 0.43% FSR gain error and 0.85 ppm/°C gain drift. Alternatively, the internal reference can be enabled via SPI, producing –1.15% FSR gain error and 90 ppm/°C drift. The REFBUF pin allows connection of a 1.2-V external buffer for improved noise rejection. Reference selection directly impacts DC accuracy specs and must be configured before conversion startup.

What is the analog input bandwidth of the ADC3561IRSBT, and how does it affect signal acquisition?

The ADC3561IRSBT has a specified analog input bandwidth of 900 MHz (–3 dB), enabling direct sampling of IF signals up to 450 MHz without external anti-alias filtering. This wide bandwidth supports applications like spectrum analysis and software-defined radio where preserving harmonic content and transient fidelity is critical. However, full AC performance (e.g., 81.9 dBFS SNR) is characterized up to 10 MHz input frequency; above that, SNR degrades gradually due to thermal and aperture effects-verified in Figure 6-5 of the SBAS990B datasheet.

How many pins does the ADC3561IRSBT have, and what is its package type?

The ADC3561IRSBT uses a 40-pin WQFN package (Texas Instruments RSB designation) measuring 5.0 mm × 5.0 mm with an exposed thermal pad on the underside. Pin assignments-including AINP/AINM, CLKP/CLKM, DA0P/DA0M, DCLKP/DCLKM, and SPI interface signals-are fully documented in Table 5-1 and Figure 5-1 of the SBAS990B datasheet. The package supports reflow soldering per JEDEC J-STD-020 and provides low thermal resistance (RΘJA = 30.7°C/W) for reliable operation at 105°C junction temperature.

What digital interface options does the ADC3561IRSBT provide, and what are their data rates?

The ADC3561IRSBT features a configurable serial LVDS (SLVDS) interface supporting 1-wire, 1/2-wire, and 2-wire modes. At its rated 10 MSPS sampling rate, 1-wire mode delivers 160 MBPS per differential pair (DA0P/DA0M), 1/2-wire yields 320 MBPS on DA0P/DA0M, and 2-wire provides 80 MBPS per lane (DA0P/DA0M and DA1P/DA1M). All modes use DCLKP/DCLKM for synchronous clock recovery and support 1000 Mbps per lane at higher speeds-though ADC3561IRSBT's maximum usable rate remains limited to 10 MSPS sample throughput.