ADS8861IDGSR 16-Bit 1MSPS SAR ADC IC True Differential Input SPI
High-precision 16-bit ADC with 1MSPS sampling rate and true-differential input. Features 96dB SNR, -115dB THD, and low power dissipation down to 5.5mW. SPI-compatible serial interface with daisy-chain support. Ideal for ATE, instrumentation, and medical equipment.
ADS8861IDGSR Data Converter IC ADC 16B 1MSPS Mini Diff Input SAR ADC
FEATURES
- Sample Rate: 1 MHz
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No Latency Output
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Unipolar, True-Differential Input Range:
–VREF to +VREF
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Wide Common-Mode Voltage Range:
0 V to VREF with 90-dB CMRR (min)
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SPITM-Compatible Serial Interface with Daisy-Chain Option
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Excellent AC and DC Performance:
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– SNR: 96 dB, THD: –115 dB
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– INL: ±1.0 LSB (max)
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– DNL: ±1.0 LSB (max), 16-Bit NMC
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Wide Operating Range:
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– AVDD:2.7Vto3.6V
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– DVDD:2.7Vto3.6V (Independent of AVDD)
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– REF: 2.5 V to 5 V (Independent of AVDD)
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– Operating Temperature: –40°C to +85°C
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Low-Power Dissipation:
– 5.5mWat1MSPS
– 0.55 mW at 100 kSPS – 55μWat10kSPS
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Power-Down Current (AVDD): 50 nA
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Full-Scale Step Settling to 16 Bits: 290 ns
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Packages: MSOP-10 and SON-10
APPLICATIONS
• Automatic Test Equipment (ATE)
• Instrumentation and Process Controls
• Precision Medical Equipment
• Low-Power, Battery-Operated Instruments
DESCRIPTION
The ADS8861 is a 16-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 ADS8861 excellent for lower-speed applications.
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