The ADS8881 is an 18-bit, 1-MSPS, 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 ADS8881 excellent for lower-speed applications.
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) |
INL (Max) (+/-LSB) |
SINAD (dB) |
SNR (dB) |
THD (Typ) (dB) |
Rating |
ADS8881 | ADS8900B | ADS8902B | ADS8904B | ADS8910B | ADS8912B | ADS8914B | ADS8920B | ADS8922B | ADS8924B |
---|---|---|---|---|---|---|---|---|---|
18 | 20 | 20 | 20 | 18 | 18 | 18 | 16 | 16 | 16 |
1000 | 1000 | 500 | 250 | 1000 | 500 | 250 | 1000 | 500 | 250 |
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
SPI | SPI | SPI | SPI | SPI | SPI | SPI | SPI | SPI | SPI |
-40 to 85 0 to 70 |
-40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 | -40 to 125 |
VSON | 10
VSSOP | 10 |
VQFN | 24 | VQFN | 24 | VQFN | 24 | VQFN | 24 | VQFN | 24 | VQFN | 24 | VQFN | 24 | VQFN | 24 | VQFN | 24 |
11.95 | 1ku | 24.95 | 1ku | 15.95 | 1ku | 9.95 | 1ku | 11.97 | 1ku | 8.97 | 1ku | 6.97 | 1ku | 9.15 | 1ku | 6.15 | 1ku | 5.15 | 1ku |
5.5 | 21 | 16 | 14 | 21 | 16 | 14 | 21 | 16 | 14 |
10VSON: 9 mm2: 3 x 3 (VSON | 10)
10VSSOP: 9 mm2: 3 x 3 (VSSOP | 10) |
24VQFN: 16 mm2: 4 x 4 (VQFN | 24) | 24VQFN: 16 mm2: 4 x 4 (VQFN | 24) | 24VQFN: 16 mm2: 4 x 4 (VQFN | 24) | 24VQFN: 16 mm2: 4 x 4 (VQFN | 24) | 24VQFN: 16 mm2: 4 x 4 (VQFN | 24) | 24VQFN: 16 mm2: 4 x 4 (VQFN | 24) | 24VQFN: 16 mm2: 4 x 4 (VQFN | 24) | 24VQFN: 16 mm2: 4 x 4 (VQFN | 24) | 24VQFN: 16 mm2: 4 x 4 (VQFN | 24) |
SAR | SAR | SAR | SAR | SAR | SAR | SAR | SAR | SAR | SAR |
Differential | Differential | Differential | Differential | Differential | Differential | Differential | Differential | Differential | Differential |
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