ADS7890 Series

14-Bit, 1.25MSPS, 1-Ch SAR ADC with Serial Interface and Internal Voltage Reference

Catalog

14-Bit, 1.25MSPS, 1-Ch SAR ADC with Serial Interface and Internal Voltage Reference

Part	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]	Number of A/D Converters	Supplier Device Package	Input Type	Number of Inputs	Operating Temperature [Max]	Operating Temperature [Min]	Mounting Type	Ratio - S/H:ADC	Configuration	Data Interface	Sampling Rate (Per Second)	Voltage - Supply, Analog	Reference Type	Number of Bits	Architecture	Package / Case
Texas Instruments ADS7890IPFBTG4	5.25 V	2.7 V	1	48-TQFP (7x7)	Pseudo-Differential	1	85 °C	-40 °C	Surface Mount	1:1	S/H-ADC	SPI	1.25 M	5 V	External Internal	14	SAR	48-TQFP
Texas Instruments ADS7890IPFBT	5.25 V	2.7 V	1	48-TQFP (7x7)	Pseudo-Differential	1	85 °C	-40 °C	Surface Mount	1:1	S/H-ADC	SPI	1.25 M	5 V	External Internal	14	SAR	48-TQFP

Catalog

14-Bit, 1.25MSPS, 1-Ch SAR ADC with Serial Interface and Internal Voltage Reference

Key Features

• 1.25 MHz Sample Rate, 14-Bit ResolutionZero LatencyUnipolar, Pseudo Differential Input, Range:0 V to 2.5 VSPI™ Compatible Serial Interface77.5 dB SNR and –95 dB THD at 0.5 MHz I/PPower Dissipation 45 mW at 1.25 MSPSNap Mode (10 mW Power Dissipation)Power Down (10 µW)Internal ReferenceInternal Reference Buffer48-Pin TQFP PackageAPPLICATIONSOptical Networking (DWDM, MEMS Based Switching)Spectrum AnalyzersHigh Speed Data Acquisition SystemsHigh Speed Close-Loop SystemsTelecommunicationSPI is a trademark of Motorola, Inc.1.25 MHz Sample Rate, 14-Bit ResolutionZero LatencyUnipolar, Pseudo Differential Input, Range:0 V to 2.5 VSPI™ Compatible Serial Interface77.5 dB SNR and –95 dB THD at 0.5 MHz I/PPower Dissipation 45 mW at 1.25 MSPSNap Mode (10 mW Power Dissipation)Power Down (10 µW)Internal ReferenceInternal Reference Buffer48-Pin TQFP PackageAPPLICATIONSOptical Networking (DWDM, MEMS Based Switching)Spectrum AnalyzersHigh Speed Data Acquisition SystemsHigh Speed Close-Loop SystemsTelecommunicationSPI is a trademark of Motorola, Inc.

Description

The ADS7890 is a 14-bit 1.25-MSPS A-to-D converter with 2.5-V internal reference. The device includes a capacitor based SAR A/D converter with inherent sample and hold. The device offers a 14-bit serial SPI or DSP compatible interface. The device has a pseudo-differential input stage. The –IN swing of ±200 mV is useful to compensate for ground voltage mismatch between the ADC and sensor and also to cancel common-mode noise. The device operates at lower power when used at lower conversion rates because of the nap feature. The device is available in a 48-pin TQFP package. The ADS7890 is a 14-bit 1.25-MSPS A-to-D converter with 2.5-V internal reference. The device includes a capacitor based SAR A/D converter with inherent sample and hold. The device offers a 14-bit serial SPI or DSP compatible interface. The device has a pseudo-differential input stage. The –IN swing of ±200 mV is useful to compensate for ground voltage mismatch between the ADC and sensor and also to cancel common-mode noise. The device operates at lower power when used at lower conversion rates because of the nap feature. The device is available in a 48-pin TQFP package.