ADS8881 - 18 位、1 MSPS、串行接口、微功耗、真正差动输入 SAR ADC

ADS8881是TI德州仪器公司的一款精密ADC(<=10MSPS)产品，ADS8881是18 位、1 MSPS、串行接口、微功耗、真正差动输入 SAR ADC，本站介绍了ADS8881的封装应用图解、特点和优点、功能等，并给出了与ADS8881相关的TI元器件型号供参考。

ADS8881 - 18 位、1 MSPS、串行接口、微功耗、真正差动输入 SAR ADC - 精密ADC(<=10MSPS) - 模数转换器 - 德州仪器

产品特性

Sample Rate: 1 MHz
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:
- ADS8881C: INL: ±1 LSB (typ), ±2.0 LSB (max)DNL: ±1.0 LSB (max), 18-Bit NMC SNR: 100 dB, THD: –115 dB
- ADS8881I: INL: ±1.5 LSB (typ), ±3.0 LSB (max)DNL: +1.5 and –1 LSB (max), 18-Bit NMC SNR: 100 dB, THD: –115 dB
Wide Operating Range:
- AVDD: 2.7 V to 3.6 V
- DVDD: 2.7 V to 3.6 V (Independent of AVDD)
- REF: 2.5 V to 5 V (Independent of AVDD)
- Operating Temperature: ADS8881C : 0°C to +70°C ADS8881I : –40°C to +85°C
Low-Power Dissipation:
- 5.5 mW at 1 MSPS
- 0.55 mW at 100 kSPS
- 55 µW at 10 kSPS
Power-Down Current (AVDD): 50 nA
Full-Scale Step Settling to 18 Bits: 290 ns
Packages: MSOP-10 and VSON-10

产品应用

Automatic Test Equipment (ATE)
Instrumentation and Process Controls
Precision Medical Equipment
Low-Power, Battery-Operated Instruments

产品说明

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.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
ADS8881x	VSSOP (10)	3.00 mm × 3.00 mm
ADS8881x	VSON (10)	3.00 mm × 3.00 mm

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