ADS8914B Series

18-Bit, 250-kSPS, 1-Ch SAR ADC with Internal VREF Buffer, Internal LDO and Enhanced SPI Interface

Catalog

18-Bit, 250-kSPS, 1-Ch SAR ADC with Internal VREF Buffer, Internal LDO and Enhanced SPI Interface

Part	Package / Case	Data Interface	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]	Number of Inputs	Supplier Device Package	Configuration	Sampling Rate (Per Second)	Number of A/D Converters	Voltage - Supply, Analog [Min]	Voltage - Supply, Analog [Max]	Ratio - S/H:ADC	Features	Input Type	Architecture	Reference Type	Mounting Type	Operating Temperature [Max]	Operating Temperature [Min]
Texas Instruments ADS8914BRGER	24-VFQFN Exposed Pad	SPI	5.5 V	1.65 V	1	24-VQFN (4x4)	S/H-ADC	250 k	1	3 V	5.5 V	1:1	Internal Oscillator	Differential	SAR	External	Surface Mount	125 °C	-40 °C
Texas Instruments ADS8914BRGET	24-VFQFN Exposed Pad	SPI	5.5 V	1.65 V	1	24-VQFN (4x4)	S/H-ADC	250 k	1	3 V	5.5 V	1:1		Differential	SAR	External	Surface Mount	125 °C	-40 °C

Catalog

18-Bit, 250-kSPS, 1-Ch SAR ADC with Internal VREF Buffer, Internal LDO and Enhanced SPI Interface

Key Features

• Resolution: 18-BitsHigh Sample Rate With No Latency Output:ADS8910B: 1-MSPSADS8912B: 500-kSPSADS8914B: 250-kSPSIntegrated LDO Enables Single-Supply OperationLow-Power Reference Buffer With No DroopExcellent AC and DC Performance:SNR: 102.5-dB, THD: –125-dBINL: ±0.5-LSBDNL: ±0.2-LSB, 18-Bit No-Missing-CodesWide Input Range:Unipolar Differential Input Range: ±VREFVREFInput Range: 2.5-V to 5-VSingle-Supply, Low-Power Operation(Includes Internal Reference Buffer and LDO)ADS8910B : 21-mW at 1-MSPSADS8912B : 16-mW at 500-kSPSADS8914B : 14-mW at 250-kSPSEnhanced-SPI Digital InterfaceInterface SCLK: 20-MHz at 1-MSPSConfigurable Data Parity OutputExtended Temperature Range: –40°C to +125°CSmall Footprint: 4-mm × 4-mm VQFNResolution: 18-BitsHigh Sample Rate With No Latency Output:ADS8910B: 1-MSPSADS8912B: 500-kSPSADS8914B: 250-kSPSIntegrated LDO Enables Single-Supply OperationLow-Power Reference Buffer With No DroopExcellent AC and DC Performance:SNR: 102.5-dB, THD: –125-dBINL: ±0.5-LSBDNL: ±0.2-LSB, 18-Bit No-Missing-CodesWide Input Range:Unipolar Differential Input Range: ±VREFVREFInput Range: 2.5-V to 5-VSingle-Supply, Low-Power Operation(Includes Internal Reference Buffer and LDO)ADS8910B : 21-mW at 1-MSPSADS8912B : 16-mW at 500-kSPSADS8914B : 14-mW at 250-kSPSEnhanced-SPI Digital InterfaceInterface SCLK: 20-MHz at 1-MSPSConfigurable Data Parity OutputExtended Temperature Range: –40°C to +125°CSmall Footprint: 4-mm × 4-mm VQFN

Description

The ADS8910B, ADS8912B, and ADS8914B (ADS891xB) belong to a family of pin-to-pin compatible, high-speed, single-channel, high-precision, 18-bit successive approximation register (SAR) analog-to-digital convertors (ADCs) with an integrated reference buffer and integrated low-dropout regulator (LDO). The device family includes the ADS890xB (20-bit) and ADS892xB (16-bit) resolution variants. The ADS891xB boost analog performance while maintaining high-resolution data transfer by using TI’s enhanced-SPI feature. Enhanced-SPI enables the ADS89xxB to achieve high throughput at lower clock speeds, thereby simplifying the board layout and lowering system cost. Enhanced-SPI also simplifies clocking-in of data, thereby making this device an excellent choice for applications involving FPGAs, DSPs. The ADS89xxB is compatible with a standard SPI Interface. The ADS891xB has an internal data parity feature that can be appended to the ADC data output. ADC data validation by the host, using parity bits, improves system reliability. The ADS8910B, ADS8912B, and ADS8914B (ADS891xB) belong to a family of pin-to-pin compatible, high-speed, single-channel, high-precision, 18-bit successive approximation register (SAR) analog-to-digital convertors (ADCs) with an integrated reference buffer and integrated low-dropout regulator (LDO). The device family includes the ADS890xB (20-bit) and ADS892xB (16-bit) resolution variants. The ADS891xB boost analog performance while maintaining high-resolution data transfer by using TI’s enhanced-SPI feature. Enhanced-SPI enables the ADS89xxB to achieve high throughput at lower clock speeds, thereby simplifying the board layout and lowering system cost. Enhanced-SPI also simplifies clocking-in of data, thereby making this device an excellent choice for applications involving FPGAs, DSPs. The ADS89xxB is compatible with a standard SPI Interface. The ADS891xB has an internal data parity feature that can be appended to the ADC data output. ADC data validation by the host, using parity bits, improves system reliability.