PGA900AYZSR datasheet(8/137 Pages) TI1

Part #	PGA900AYZSR

Description	PGA900 Programmable Resistive Sensing Conditioner with Digital and Analog Outputs

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Manufacturer	TI1 [Texas Instruments]

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2.5V

2.0V

1.25V

2.5V

VBRGP

VINPP

VINPN

AVDD

Regulator

3V

Reverse

Protection

2.5V

Reference

2.5V

PGA

ADC

VDD

2.5V

Ref

Buf

REFCAP

DAC

VBRG

Buf

MUX

VOUT

DACCAP

100nF

3.3nF

40K

DAC

GAIN

vddp

A

B

C

E

R

1.25V

AVDD

100nF

DVDD

Regulator

DVDD

100nF

1.8V

Ratiometric

Absolute

R1

ITEMP

Buf

VINTP

6

9DOXH DW 7(03 ± 9DOXH DW &

TEMP DRIFT

10

Value at 25 C

TEMP

G

K

G K

(1)

PGA900

SLDS209A – JANUARY 2015 – REVISED MAY 2015

www.ti.com

6.10 Bridge Sensor Supply

over operating free-air temperature range at VDD = 5 V (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VBRG SUPPLY FOR RESISTIVE BRIDGE SENSORS

Bridge supply control bit = 0b00, no

2.5

load

VBRGP-

Bridge supply control bit = 0b01, no

Bridge supply voltage

2.0

V

VBRGN

load

Bridge supply control bit = 0b10, no

1.25

load

Across temperature for 2.5 V bridge

6.5

20

output at no load

Bridge supply voltage temperature

Across temperature for 2.0 V bridge

7.5

ppm/°C

variation(1)

output at no load

Across temperature for 1.25 V bridge

15.5

output at no load

IBRG

Current supply to the bridge

1.5

mA

CBRG

Capacitive load

RBRG = 20 kΩ

2

nF

Figure 2. Bridge Supply and P ADC Reference are Ratiometric

8

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