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ADS8885

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18-Bit, 400-kSPS, 1-Ch SAR ADC with True-Differential Input, SPI Interface and Daisy-Chain

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Data sheet

ADS8885

ACTIVE
Data sheet Order now

Product details

Resolution (Bits) 18 Sample rate (max) (ksps) 400 Number of input channels 1 Interface type SPI Architecture SAR Input type Differential Rating Catalog Reference mode External Input voltage range (max) (V) 5 Input voltage range (min) (V) 0 Features Daisy-Chainable, Oscillator, Small Size Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 2.6 Analog supply (min) (V) 2.7 Analog supply voltage (max) (V) 3.6 SNR (dB) 100 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
Resolution (Bits) 18 Sample rate (max) (ksps) 400 Number of input channels 1 Interface type SPI Architecture SAR Input type Differential Rating Catalog Reference mode External Input voltage range (max) (V) 5 Input voltage range (min) (V) 0 Features Daisy-Chainable, Oscillator, Small Size Operating temperature range (°C) -40 to 85 Power consumption (typ) (mW) 2.6 Analog supply (min) (V) 2.7 Analog supply voltage (max) (V) 3.6 SNR (dB) 100 Digital supply (min) (V) 1.65 Digital supply (max) (V) 3.6
VSON (DRC) 10 9 mm² 3 x 3 VSSOP (DGS) 10 14.7 mm² 3 x 4.9
  • Sample Rate: 400 kHz
  • No Latency Output
  • Unipolar, True-Differential Input Range:
    –VREF to +VREF
  • Wide Common-Mode Voltage Range:
    0 V to VREF with 90-dB CMRR (min)
  • SPI™-Compatible Serial Interface with
    Daisy-Chain Option
  • Excellent AC and DC Performance:
    • SNR: 100 dB, THD: –115 dB
    • INL: ±1.5 LSB (typ), ±3.0 LSB (max)
    • DNL: +1.5 and –1 LSB (max), 18-Bit NMC
  • Wide Operating Range:
    • AVDD: 2.7 V to 3.6 V
    • DVDD: 1.65 V to 3.6 V
      (Independent of AVDD)
    • REF: 2.5 V to 5 V (Independent of AVDD)
    • Operating Temperature: –40°C to +85°C
  • Low-Power Dissipation:
    • 2.6 mW at 400 kSPS
    • 0.65 mW at 100 kSPS
    • 65 µW at 10 kSPS
  • Power-Down Current (AVDD): 50 nA
  • Full-Scale Step Settling to 18 Bits: 1200 ns
  • Packages: MSOP-10 and SON-10
  • Sample Rate: 400 kHz
  • No Latency Output
  • Unipolar, True-Differential Input Range:
    –VREF to +VREF
  • Wide Common-Mode Voltage Range:
    0 V to VREF with 90-dB CMRR (min)
  • SPI™-Compatible Serial Interface with
    Daisy-Chain Option
  • Excellent AC and DC Performance:
    • SNR: 100 dB, THD: –115 dB
    • INL: ±1.5 LSB (typ), ±3.0 LSB (max)
    • DNL: +1.5 and –1 LSB (max), 18-Bit NMC
  • Wide Operating Range:
    • AVDD: 2.7 V to 3.6 V
    • DVDD: 1.65 V to 3.6 V
      (Independent of AVDD)
    • REF: 2.5 V to 5 V (Independent of AVDD)
    • Operating Temperature: –40°C to +85°C
  • Low-Power Dissipation:
    • 2.6 mW at 400 kSPS
    • 0.65 mW at 100 kSPS
    • 65 µW at 10 kSPS
  • Power-Down Current (AVDD): 50 nA
  • Full-Scale Step Settling to 18 Bits: 1200 ns
  • Packages: MSOP-10 and SON-10

The ADS8885 is an 18-bit, 400-kSPS, true-differential input, analog-to-digital converter (ADC). The device operates with a 2.5-V to 5-V external reference, offering a wide selection of signal ranges without additional input signal scaling. The reference voltage setting is independent of, and can exceed, the analog supply voltage (AVDD).

The device offers an SPI-compatible serial interface that also supports daisy-chain operation for cascading multiple devices. An optional busy-indicator bit makes synchronizing with the digital host easy.

The device supports unipolar, true-differential analog input signals with a differential input swing of –VREF to +VREF. This true-differential analog input structure allows for a common-mode voltage of any value in the range of 0 V to +VREF (when both inputs are within the operating input range of –0.1 V to VREF + 0.1 V).

Device operation is optimized for very low-power operation. Power consumption directly scales with speed. This feature makes the ADS8885 excellent for lower-speed applications.

The ADS8885 is an 18-bit, 400-kSPS, true-differential input, analog-to-digital converter (ADC). The device operates with a 2.5-V to 5-V external reference, offering a wide selection of signal ranges without additional input signal scaling. The reference voltage setting is independent of, and can exceed, the analog supply voltage (AVDD).

The device offers an SPI-compatible serial interface that also supports daisy-chain operation for cascading multiple devices. An optional busy-indicator bit makes synchronizing with the digital host easy.

The device supports unipolar, true-differential analog input signals with a differential input swing of –VREF to +VREF. This true-differential analog input structure allows for a common-mode voltage of any value in the range of 0 V to +VREF (when both inputs are within the operating input range of –0.1 V to VREF + 0.1 V).

Device operation is optimized for very low-power operation. Power consumption directly scales with speed. This feature makes the ADS8885 excellent for lower-speed applications.

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Type Title Date
* Data sheet 18-Bit, 400-kSPS, Serial Interface, microPower, Miniature, True-Differential Inp datasheet (Rev. A) 17 Dec 2013
Circuit design Circuit for protecting low-voltage SAR ADC from electrical overstress with minim 25 May 2019
White paper Voltage-reference impact on total harmonic distortion 01 Aug 2016
E-book Best of Baker's Best: Precision Data Converters -- SAR ADCs 21 May 2015

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VSON (DRC) 10 View options
VSSOP (DGS) 10 View options
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