ADS54J40 datasheet(76/88 Pages) TI2

Part #	ADS54J40

Description	ADS54J20 Dual-Channel, 12-Bit, 1.0-GSPS, Analog-to-Digital Converter

PDF	88 Pages

Scroll/Zoom	100%

Manufacturer	TI2 [Texas Instruments]

Direct Link	https://www.ti.com

Logo

76 / 88 page

IOVDD = 1.15 V

DVDD = 1.9 V

AVDD = 1.9 V

AVDD = 3 V

ADS54J20

SBAS766B – MAY 2016 – REVISED JANUARY 2017

www.ti.com

Product Folder Links: ADS54J20

Submit Documentation Feedback

10.1 Power Sequencing and Initialization

Figure 138 shows the suggested power-up sequencing for the device. Note that the 1.15-V IOVDD supply must

rise before the 1.9-V DVDD supply. If the 1.9-V DVDD supply rises before the 1.15-V IOVDD supply, then the

internal default register settings may not load properly. The other supplies (the 3-V AVDD3V and the 1.9-V

AVDD), can come up in any order during the power sequence. The power supplies can ramp up at any rate and

there is no hard requirement for the time delay between IOVDD ramp up to DVDD ramp-up (can be in orders of

microseconds but is recommend to be a few milliseconds).

Figure 138. Power Sequencing for the ADS54Jxx Family of Devices

ADS54J40 Datasheet(PDF) 76 Page - Texas Instruments