INA849 datasheet(25/39 Pages) TI2

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VIN, Differential Input Voltage (V)

-15

-12

-9

-6

-3

-15

-12

-9

-6

-3

I(Vs+)

I(Vs–)

I(IN+)

I(IN–)

VS = VSOUT = ±15V

VICM = VREF = 0V

G = 50V/V

VIN linear limits = ±0.286V

Figure 8-7. Current Consumption versus

Differential Input Voltage

VIN, Differential Input Voltage (V)

-5

-4

-3

-2

-1

-15

-12

-9

-6

-3

I(Vs+)

I(Vs–)

I(IN+)

I(IN–)

VS = VSOUT = ±15V

VICM = VREF = 0V

G = 100V/V

VIN linear limits = ±0.143V

Figure 8-8. Current Consumption versus

Differential Input Voltage

8.2 Typical Applications

8.2.1 Driving a Single-Ended Input SAR ADC

Figure 8-9 shows the schematic for a 16-bit, precision, 1MSPS, successive approximation register (SAR),

analog-to-digital converter (ADC). This circuit shows the driving capability of the PGA848 with the ADS8860

single-ended input ADC.

ADS8860

Single-Ended

SAR ADC

INP

INN

5.3V

AVSS

REF6250

5.0V

Reference

RDIV1

±0.05%

10k

REF6050

5.0V

Reference

OPA387

–

RISO

5.3V

220pF

15V

100nF

–15V

100nF

DA_IN–

OUT

IN+

IN–

DA_IN+

PGA848

Gain Network

Overvoltage

Protection

Overvoltage

Protection

VS+

DGND

–

REF

LVDD

VS–

LVSS

5.3V

1µF

REFIN

PGA848

REF Voltage

2.5V

2nF

100nF

CFB

33pF

CFB

33pF

22µF

0.22

RFIL

CDIFF

10nF

RFIL

22nF

10nF

RDIV2

±0.05%

10k

2200pF

100nF

215Ω

215

3.33k

6.67k

VIN+

VIN

VOUT = G × VIN +VREF

VIN = VIN+

VIN

VOUT

VREF

Figure 8-9. Driving the ADS8860 SAR ADC

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PGA848

SBOSAN4A – AUGUST 2025 – REVISED DECEMBER 2025

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