ADS7253 datasheet(53/73 Pages) TI2

部件名	ADS7253

功能描述	ADSxx54 Dual, High-Speed, 16-, 14-, and 12-Bit, Simultaneous-Sampling, Analog-to-Digital Converters

PDF	73 Pages

Scroll/Zoom	100%

制造商	TI2 [Texas Instruments]

网页	https://www.ti.com

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53 / 73 page

REF5025,

REF5040,

REF5050

(1)

AVDD

OPA2350

0.1

10 µF

1 k

1 µF

ADC_A

REFIN-A

VOUT

0.22

TRIM

10 µF

1 µF

1 k

1 µF

ADC_B

REFIN-B

0.1

10 µF

REFGND-A

REFGND-B

Device

AVDD

VCM

820 pF

VIN+

VIN-

THS4521

AINP

AINM

GND

AVDD

ADSxx54

INPUT DRIVER

1 K

FSR/2

330pF

ADS8354 : 16-bit, 700 kSPS

ADS7854 : 14-bit, 1 MSPS

ADS7254 : 12-bit, 1 MSPS

(1)

ADS8354, ADS7854, ADS7254

www.ti.com

SBAS556B – OCTOBER 2013 – REVISED AUGUST 2014

9.2.2 DAQ Circuit to Achieve Maximum SINAD for a 100-kHz Input Signal at Full Throughput

NOTE: Only one ADC channel is shown in this diagram. Replicate the same circuit for other ADC channels.

(1) The 330 pF capacitors are not required for ADS7854 and ADS7254.

Figure 108. DAQ Circuit: Maximum SINAD for a 100-kHz Input Signal at Full Throughput

(1) When using the REF5050, AVDD must be set to 5.5 V.

Figure 109. Reference Drive Circuit

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Product Folder Links: ADS8354 ADS7854 ADS7254

ADS7253 数据表(PDF) 53 Page - Texas Instruments

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