ADS127L01 24-Bit, 512kSPS, 1-Ch, Very-Low-Power, Wide-Bandwidth Delta-Sigma ADC | TI.com

ADS127L01 (ACTIVE) 24-Bit, 512kSPS, 1-Ch, Very-Low-Power, Wide-Bandwidth Delta-Sigma ADC

 

Description

The ADS127L01 is a 24-bit, delta-sigma (ΔΣ), analog-to-digital converter (ADC) with data rates up to 512 kSPS. This device offers a unique combination of excellent dc accuracy and outstanding ac performance. The high-order, chopper-stabilized modulator achieves very low drift with low in-band noise. The integrated decimation filter suppresses modulator out-of-band noise. In addition to al low-latency filter, the ADS127L01 provides multiple Wideband filters with less than ±0.00004 dB of ripple, and an option for –116-dB stop-band attenuation at the Nyquist rate.

Traditionally, industrial delta-sigma ADCs that offer good drift performance use digital filters with large passband droop. As a result, industrial delta-sigma ADCs have limited signal bandwidth and are mostly suited for dc measurements. High-resolution ADCs in audio applications offer larger usable bandwidths, but the offset and drift specifications are significantly weaker than industrial counterparts. The ADS127L01 combines these converters, providing high-precision industrial measurement with excellent dc and ac specifications over an extended industrial temperature range of –40°C to +125°C.

A variety of operating modes allow for optimization of speed, resolution, and power. A programmable serial interface with one of three options (SPI, frame-sync slave, or frame-sync master) provides convenient interfacing across isolation barriers to microcontrollers or digital signal processors (DSPs).

Features

  • Data Rates: Up to 512 kSPS
  • AC + DC Performance:
    • Passband: Up to 230 kHz
    • SNR: Up to 115.5 dB
    • THD: Down to –129 dB
    • DC Accuracy:
    • Offset Drift: 1.5 µV/°C
    • Gain Drift: 0.2 ppm/°C
  • Operating Modes:
    • High-resolution (128 kSPS at 26 mW)
    • Low-power (128 kSPS at 15 mW)
    • Very-low Power: 105 dB SNR (128 kSPS at 9 mW)
  • Digital Filter Options:
    • Low-latency Filter: Sinc Frequency Response
    • Wideband 1 Filter:
      (0.45 to 0.55) × fDATA Transition Band
    • Wideband 2 Filter: (0.40 to 0.50) × fDATA Transition Band
  • SPI™ or Frame-Sync Serial Interface
    • Daisy-Chain Compatible
  • Analog Supply: 2.7 V to 3.6 V
  • Digital Supply: 1.7 V to 3.6 V
  • Operating Temperature: –40°C to +125°C

Parametrics

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Part number Order Resolution (Bits) Sample rate (Max) (kSPS) Number of input channels Interface Operating temperature range (C) Package Group Approx. price (US$) Power consumption (Typ) (mW) Package size: mm2:W x L (PKG) Architecture Input type Multi-channel configuration Reference mode Features Input range (Max) (V) Input range (Min) (V) Analog voltage AVDD (Min) (V) Analog voltage AVDD (Max) (V) Digital supply (Min) (V) Digital supply (Max) (V) SNR (dB) THD (Typ) (dB) Rating
ADS127L01 Order now 24     512     1     SPI     -40 to 125     TQFP | 32     6.95 | 1ku     7     32TQFP: 49 mm2: 7 x 7 (TQFP | 32)     Delta-Sigma     Differential    
   
Ext     Daisy-Chainable     3     0     2.7     3.6     1.7     3.6     115.5     -126     Catalog    
ADS1271 Order now 24     105     1     SPI     -40 to 105     TSSOP | 16     6.31 | 1ku     92     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     Delta-Sigma     Differential    
   
Ext     Daisy-Chainable     5.25     0     4.75     5.25     1.65     3.6     109     -105     Catalog    
ADS1274 Order now 24     144     4     SPI     -40 to 125     HTQFP | 64     14.65 | 1ku     275     64HTQFP: 144 mm2: 12 x 12 (HTQFP | 64)     Delta-Sigma     Differential     Simultaneous Sampling     Ext     Daisy-Chainable     5.25     0     4.75     5.25     1.65     2.2     111     -108     Catalog    
ADS1278 Order now 24     144     8     SPI     -40 to 105     HTQFP | 64     25.15 | 1ku     530     64HTQFP: 144 mm2: 12 x 12 (HTQFP | 64)     Delta-Sigma     Differential     Simultaneous Sampling     Ext     Daisy-Chainable