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

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Parametrics Compare all products in Precision ADCs (<=10MSPS)

 
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)
SINAD (dB)
SNR (dB)
THD (Typ) (dB)
Rating
ADS127L01 ADS1271 ADS1274 ADS1278
24     24     24     24    
512     105     144     144    
1     1     4     8    
SPI     SPI     SPI     SPI    
-40 to 125     -40 to 105     -40 to 125     -40 to 105    
TQFP | 32     TSSOP | 16     HTQFP | 64     HTQFP | 64    
6.95 | 1ku     6.31 | 1ku     14.65 | 1ku     25.15 | 1ku    
7     92     275     530    
32TQFP: 49 mm2: 7 x 7 (TQFP | 32)     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)     64HTQFP: 144 mm2: 12 x 12 (HTQFP | 64)     64HTQFP: 144 mm2: 12 x 12 (HTQFP | 64)    
Delta-Sigma     Delta-Sigma     Delta-Sigma     Delta-Sigma    
Differential     Differential     Differential     Differential    
   
   
Simultaneous Sampling     Simultaneous Sampling    
Ext     Ext     Ext     Ext    
Daisy-Chainable     Daisy-Chainable     Daisy-Chainable     Daisy-Chainable    
3     5.25     5.25     5.25    
0     0     0     0    
2.7     4.75     4.75     4.75    
3.6     5.25     5.25     5.25    
1.7     1.65     1.65     1.65    
3.6     3.6     2.2     2.2    
115.13          
115.5     109     111     111    
-126     -105     -108     -108    
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