INA700 datasheet(18/50 Pages) TI

18 / 50 page

Number of Conversions

2000

4000

6000

8000

10000

Conversion Time: 50 µs

Conversion Time: 1.052 ms

Conversion Time: 4.120 ms

Figure 7-9. Noise vs Conversion Time (Averaging = 128)

Settings for the conversion time and number of conversions averaged impact the effective measurement

resolution. See ADC Output Data Rate and Noise Performance for more detailed information on how averaging

reduces noise and increases the effective number of bits (ENOB).

7.3.6 Integrated Precision Oscillator

The internal timebase of the device is provided by an internal oscillator that is trimmed to less than 0.5%

tolerance at room temperature. The precision oscillator is the timing source for ADC conversions, as well as

the time-count used for calculation of energy and charge. The digital filter response varies with conversion

time; therefore, the precise clock provides filter response and notch frequency consistency across temperature.

On power up, the internal oscillator and ADC take roughly 300 µs to reach <1% error stability. After the clock

stabilizes, the ADC data output will be accurate to the electrical specifications provided in Specifications.

7.3.7 Multi-Alert Monitoring and Fault Detection

The INA700 includes a multipurpose, open-drain, ALERT output pin that can be used to report multiple

diagnostics or as an indicator that the ADC conversion is complete when the device is operating in both

triggered and continuous conversion mode. The diagnostics listed in Table 7-1 are constantly monitored and can

be reported through the ALERT pin whenever the monitored output value crosses the associated out-of-range

threshold.

Table 7-1. ALERT Diagnostics Description

INA700 DIAGNOSTIC

STATUS BIT IN ALERT_DIAG REGISTER

(READ ONLY)

OUT-OF-RANGE

THRESHOLD

VALUE

Current Under-Limit

CURRENTUL

CUL

0x8000 h

(2's complement))

Current Over-Limit

CURRENTOL

COL

0x7FFF h

(2's complement))

Bus Voltage Over-Limit

BUSOL

BOVL

0x7FFF h

(2's complement), positive

values only)

Bus Voltage Under-Limit

BUSUL

BUVL

0x0000 h

(2's complement), positive

values only)

Temperature Over-Limit

TMPOL

TEMP_LIMIT

0xFFFF h

(2's complement), positive

values only)

Power Over-Limit

POL

PWR_LIMIT

0x7FFF h

(2's complement))

INA700

SBOSAB4A – MAY 2023 – REVISED SEPTEMBER 2023

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