Temperature (°C)

-50

-25

0

25

50

75

100

125

0

0.4

0.8

1.2

1.6

2

1PF

10PF

Figure 10-4. REF70 Turn-on Time

For DAC designs that do not have the RCM feature, use Figure 10-5 as it in generates the negative reference

circuit to create the VREFN. More details on this type of design can be found in SBAA322.

REF7050

Copyright © 2020, Texas Instruments Incorporated

GND

OUTS

OUTF

VIN EN

VIN

CL

CIN

C1

C2

VREFL-S

DAC8871

VCC

10 k

R2

R1

10 k

VSS

VREFL-F

VCC

VSS

VCC

VSS

VREFH-F

VREFH-S

Figure 10-5. Basic Force and Sense Reference Drive Circuit Connections

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REF70

SNAS781E – OCTOBER 2020 – REVISED JULY 2022

Copyright © 2022 Texas Instruments Incorporated

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