Texas Instruments ADS1602IPFBR

Overview

ADS1602IPFBR from Texas Instruments is a 16-bit, 2.5MSPS delta-sigma analog-to-digital converter with ±3V differential input range, 91dB SNR at 100kHz, –101dB THD, and 103dB SFDR. It features an on-chip 16× decimation FIR filter, 3-wire serial interface, and simultaneous sampling support via SYNC pin - deployed in high-fidelity sonar signal chains.

For engineers reviewing the ADS1602IPFBR datasheet, ADS1602IPFBR pinout, ADS1602IPFBR application, or ADS1602IPFBR equivalent, key selection criteria include its 1.23MHz –3dB bandwidth, internal/external reference flexibility (REFEN-controlled), 40MHz clock input tolerance, OTR out-of-range flag, and TQFP-48 package compatibility with high-density PCB layouts.

Technical Context

The ADS1602IPFBR employs a stable 2-1-1 multi-stage delta-sigma modulator sampling at up to 40MSPS, followed by a linear-phase 4-stage half-band FIR decimation filter delivering 75dB stopband attenuation and ±0.001dB passband ripple. Its architecture inherently reduces clock jitter sensitivity by 4× versus Nyquist ADCs.

Input measurement is referenced differentially to VREF = (VREFP – VREFN), configurable internally (3V nominal) or externally (2–3.25V). Analog inputs require strict common-mode voltage control (1.45V typical) and absolute voltage limits (–0.1V to 4.6V vs AGND) to prevent ESD diode conduction or linearity degradation.

Key Specifications

Pinout & Package

TQFP-48 package (7mm × 7mm, 0.5mm pitch), thermally enhanced with exposed pad (not electrically connected), rated for –40°C to +105°C junction operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS1606IPFB and AD7606BSTZ, the ADS1602IPFBR uniquely balances 2.5MSPS throughput, 91dB SNR, and hardware-synced multi-device operation in a pin-compatible TQFP-48 footprint - making it optimal for real-time, phase-coherent, high-dynamic-range acquisition where jitter resilience and out-of-range visibility are mandatory.

Availability

ADS1602IPFBR is available at Aetrix Electronics and suitable for sonar signal processing, vibration analysis, and high-fidelity data acquisition requiring stable component supply across extended product lifecycles.

Supply support for ADS1602IPFBR 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 connectivity technologies with over 90 years of innovation in precision signal chain solutions.

The ADS1602IPFBR belongs to TI's high-speed precision delta-sigma ADC product line, engineered specifically for demanding measurement applications where jitter immunity, wide input range, and deterministic synchronization are critical - such as underwater acoustics and structural dynamics testing.

FAQ

What is the maximum clock frequency supported by the ADS1602IPFBR?

The ADS1602IPFBR supports a maximum clock frequency of 40MHz, as specified in the absolute maximum ratings and electrical characteristics tables. At this frequency, the device achieves its rated 2.5MSPS output data rate with 1.23MHz –3dB bandwidth. Operating above 40MHz violates absolute maximum conditions and may cause permanent damage or parametric failure.

Does the ADS1602IPFBR require external configuration registers to operate?

No, the ADS1602IPFBR does not require external configuration registers. All functionality-including reference selection (REFEN), power-down (PD), and synchronization (SYNC)-is controlled by dedicated I/O pins with no internal register map. This pin-driven architecture eliminates SPI/I²C initialization overhead and ensures deterministic startup behavior in the ADS1602IPFBR.

How does the OTR pin function in the ADS1602IPFBR?

The OTR (Out-of-Range) pin on the ADS1602IPFBR is a digital output that asserts high whenever the absolute value of the differential input voltage (|AINP – AINN|) exceeds the absolute value of the reference voltage (|VREFP – VREFN|). This hardware flag operates independently of the serial interface and provides immediate saturation detection without host processor polling - a key feature for real-time protection in the ADS1602IPFBR.

Can the ADS1602IPFBR be used with an external voltage reference?

Yes, the ADS1602IPFBR supports external voltage reference operation when the REFEN pin is driven high. In this mode, VREFP and VREFN accept a differential reference voltage from 2V to 3.25V, enabling system-level reference sharing or metrology-grade calibration. The internal 3V reference is disabled, and VMID settles to 2.3–2.6V depending on external reference values.

What is the purpose of the RBIAS pin on the ADS1602IPFBR?

The RBIAS pin on the ADS1602IPFBR connects to an external resistor (typically 37kΩ) that sets the analog bias current and directly controls power dissipation. Reducing RBIAS lowers AVDD current and total power - e.g., from 530mW at 2.5MSPS to ~300mW at slower data rates - enabling thermal optimization without sacrificing ADC core functionality in the ADS1602IPFBR.