16-Bit, 1.25MSPS, High Speed and High Precision Delta Sigma ADC


Product details


Resolution (Bits) 16 Number of input channels 1 Sample rate (Max) (kSPS) 1250 Interface Serial Architecture Delta-Sigma Input type Differential Multi-channel configuration Rating Catalog Reference mode Ext, Int Input range (Max) (V) 4.6 Input range (Min) (V) 0 Features Operating temperature range (C) -40 to 85 Power consumption (Typ) (mW) 330 Analog voltage AVDD (Min) (V) 4.75 SNR (dB) 91 Analog voltage AVDD (Max) (V) 5.25 INL (Max) (+/-LSB) 0.75 Digital supply (Min) (V) 2.7 Digital supply (Max) (V) 5.25 Approx. price (US$) 7.11 | 1ku open-in-new Find other Precision ADCs (<=10MSPS)

Package | Pins | Size

TQFP (PFB) 48 81 mm² 9 x 9 open-in-new Find other Precision ADCs (<=10MSPS)


  • High Speed:
    • Data Rate: 1.25MSPS
    • Bandwidth: 615kHz
  • Outstanding Performance:
    • SNR: 92dB at fIN = 100kHz, –1dBFS
    • THD: –103dB at fIN = 100kHz, –6dBFS
    • SFDR: 105dB at fIN = 100kHz, –6dBFS
  • Ease-of-Use:
    • High-Speed 3-Wire Serial Interface
    • Directly Connects to TMS320 DSPs
    • On-Chip Digital Filter Simplifies Anti-Alias Requirements
    • Simple Pin-Driven Control—No On-Chip Registers to Program
    • Selectable On-Chip Voltage Reference
    • Simultaneous Sampling with Multiple ADS1601s
  • Low Power:
    • 330mW at 1.25MSPS
    • 145mW at 625kSPS
    • Power-Down Mode
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The ADS1601 is a high-speed, high-precision, delta-sigma analog-to-digital converter (ADC) manufactured on an advanced CMOS process. The ADS1601 oversampling topology reduces clock jitter sensitivity during the sampling of high-frequency, large amplitude signals by a factor of four over that achieved by Nyquist-rate ADCs. Consequently, signal-to-noise ratio (SNR) is particularly improved. Total harmonic distortion (THD) is –103dB, and the spurious-free dynamic range (SFDR) is 105dB

Optimized for power and performance, the ADS1601 dissipates only 330mW while providing a full-scale differential input range of ±0.94VREF. Having such a wide input range makes out-of-range signals uncommon. The OTR pin indicates if an analog input out-of-range condition does occur. The differential input signal is measured against the differential reference, which can be generated internally on the ADS1601 or supplied externally.

The ADS1601 uses an inherently stable advanced modulator with an on-chip decimation filter. The filter stop band extends to 19.3MHz, which greatly simplifies the anti-aliasing circuitry. The modulator samples the input signal up to 20MSPS, depending on fCLK, while the 16x decimation filter uses a series of four half-band FIR filter stages to provide 75dB of stop band attenuation and 0.001dB of passband ripple.

Output data is provided over a simple 3-wire serial interface at rates up to 1.25MSPS, with a –3dB bandwidth of 615kHz. The output data or its complementary format directly connects to DSPs such as TI’s TMS320 family, FPGAs, or ASICs. A dedicated synchronization pin enables simultaneous sampling with multiple ADS1601s in multi-channel systems. Power dissipation is set by an external resistor that allows a reduction in dissipation when operating at slower speeds. All of the ADS1601 features are controlled by dedicated I/O pins, which simplify operation by eliminating the need for on-chip registers.

The high performing, easy-to-use ADS1601 is especially suitable for demanding measurement applications in sonar, vibration analysis, and data acquisition. The ADS1601 is offered in a small, 7mm × 7mm TQFP-48 package and is specified from –40°C to +85°C.

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Technical documentation

= Featured
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Type Title Date
* Datasheet 16-Bit, 1.25MSPS Analog-to-Digital Converter datasheet (Rev. D) Oct. 20, 2011
Application notes Digital Filter Types in Delta-Sigma ADCs Jun. 27, 2017
Application notes ADS16xx Reference Options Aug. 10, 2016
White papers Voltage-reference impact on total harmonic distortion Aug. 01, 2016
More literature Best of Baker's Best: Precision Data Converters -- Delta-Sigma ADCs Mar. 19, 2015

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development


ADC-INPUT-CALC is an online tool that provides support for designing the input buffer to an analog-to-digital converter (ADC). It offers 24 different op-amp based buffer circuits that can be used to drive an ADC input. The available topologies cover differential, single-ended and transformer-coupled (...)

Software development

DCPFREETOOL Software Plug-In to Code Composer Studio
DCPFREETOOL The data converter support plug-in is a free tool, which allows the user of Code Composer Studio™ to create initialization data and configuration software for Texas Instruments data converters based on inputs on a graphical user interface.

IMPORTANT: Please read the following before downloading the (...)


The data converter support plug-in (DCP) is a component of TI's Code Composer Studio™ and offers easy-to-use windows for the "point-and-click" configuration of TI's data converters from within the integrated development environment (IDE), preventing illegal combinations of settings. The DCP (...)

Design tools & simulation

SBAC048A.ZIP (7 KB) - IBIS Model
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
Analog engineer's calculator
ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
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TQFP (PFB) 48 View options

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