Texas Instruments ADS7230IPWR

Overview

ADS7230IPWR from Texas Instruments is a 12-bit, 1-MSPS dual-channel unipolar SAR analog-to-digital converter with integrated 2:1 multiplexer, SPI/DSP-compatible serial interface, and programmable TAG bit output. It operates from 2.7V to 5.5V analog supply, delivers ±0.5 LSB max INL/DNL, and supports daisy-chain mode for multi-ADC systems in industrial data acquisition.

For engineers reviewing the ADS7230IPWR datasheet, ADS7230IPWR pinout, ADS7230IPWR application, or ADS7230IPWR equivalent, key selection considerations include dual-channel auto/manual channel select, 18-cycle conversion time, built-in conversion clock (21–24.5 MHz), EOC/INT/CDI programmable status output, and TSSOP-16 package compatibility with industrial temperature range (–40°C to +85°C).

Technical Context

The ADS7230IPWR implements a capacitor-based successive approximation register (SAR) architecture with inherent sample-and-hold, supporting both manual (CONVST-triggered) and automatic (FS/CS-synchronized) conversion modes. Its dual-input MUX enables sequential sampling of +IN0 and +IN1 against COM, with 109 dB typical input channel isolation at 50 kHz.

Conversion timing is governed by an internal CCLK (21–24.5 MHz) or external SCLK (up to 50 MHz), requiring 18 CCLK cycles for full conversion and 3 CCLK cycles for acquisition. The device supports SPI™/DSP serial framing with MSB-first straight-binary output, programmable EOC/INT polarity, and optional TAG bit for channel identification in daisy-chain configurations.

Key Specifications

Pinout & Package

TSSOP-16 package (PW designation), 5.0 mm × 4.4 mm body, 0.65 mm pitch, exposed thermal pad not connected internally - requires separate analog ground connection per layout guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel 12-bit SAR ADC applications.

Compared with ADS7229IPWR and ADS8329IPWR, the ADS7230IPWR uniquely balances dual-channel flexibility, 1-MSPS speed, and daisy-chain scalability - making it optimal for cost-sensitive, space-constrained industrial DAQ where channel density and deterministic timing are critical.

Availability

ADS7230IPWR is available at Aetrix Electronics and suitable for industrial process control, medical instrumentation, magnetometer interface, and modular data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADS7230IPWR 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 industrial-grade IC design.

The ADS7230IPWR belongs to TI's low-power, high-speed SAR ADC family targeting industrial sensing and real-time control; it was engineered to replace legacy 12-bit ADCs while enabling smaller, cooler, and more deterministic measurement systems.

FAQ

What is the maximum sampling rate of the ADS7230IPWR under 3V analog supply conditions?

The ADS7230IPWR achieves 900 kSPS when +VA is between 2.7 V and 3.0 V, and 1 MSPS when +VA is between 3.0 V and 5.5 V. This stepped rate is enforced by internal clock scaling to maintain conversion accuracy and power efficiency across the full supply range. The ADS7230IPWR datasheet specifies these limits under industrial temperature conditions (–40°C to +85°C) with appropriate reference and I/O supply voltages.

Does the ADS7230IPWR require an external reference voltage, or can it operate with an internal reference?

The ADS7230IPWR requires an external reference voltage applied between REF+ and REF– pins; it does not include an internal reference. The device accepts VREF from 0.3 V to +VA, with recommended values of 2.5 V (for 3 V supplies) or 5 V (for 5 V supplies). Reference input impedance is 40 kΩ, and REF– must be connected directly to AGND via a low-inductance path to preserve DC accuracy and PSRR performance in the ADS7230IPWR.

How does the programmable TAG bit function in the ADS7230IPWR during daisy-chain operation?

In daisy-chain mode, the ADS7230IPWR appends a single TAG bit to each 12-bit conversion result: '0' for +IN0 and '1' for +IN1. When multiple ADS7230IPWR devices are cascaded, the TAG bit appears in the most significant position of the 13-bit frame, allowing the host processor to identify channel origin without additional address decoding. This feature is enabled via configuration register write and is active only when auto-channel select mode is engaged in the ADS7230IPWR.

Can the ADS7230IPWR interface directly with a 1.8V microcontroller SPI port?

Yes - the ADS7230IPWR supports independent I/O supply (+VBD) from 1.65 V to 5.5 V, allowing direct connection to 1.8 V logic without level shifters. When +VBD = 1.8 V, VIH is 1.17 V min and VOL is 0.4 V max, meeting standard 1.8 V CMOS thresholds. The ADS7230IPWR maintains full 50 MHz SCLK capability and retains all timing specifications, including tD1 (16 ns SDO valid delay) and tH1 (4 ns SDI hold), ensuring robust communication with low-voltage MCUs.

What are the power-down current levels for the ADS7230IPWR, and how are they activated?

The ADS7230IPWR offers three power-down states: Deep Power-Down (1 µA typical), Nap Mode (0.5 µA), and Auto Nap (self-entering after conversion). These are activated via SPI command writes to the configuration register - no hardware pin control is needed. In Deep Power-Down, the internal CCLK stops and all circuitry is disabled; in Nap Mode, the CCLK remains active but analog front-end bias is reduced. All modes retain register contents and resume operation within microseconds upon wake-up command in the ADS7230IPWR.