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).
|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|
||24||512||1||SPI||-40 to 125||TQFP | 32||6.95 | 1ku||7||32TQFP: 49 mm2: 7 x 7 (TQFP | 32)||Delta-Sigma||Differential||
||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||
||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|
||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||5.25|