R34DS0012EU0504 Rev.5.04

Page 21

Sep 18, 2025

ISL73141SEH Datasheet

5.

Applications Information

5.1

Overview

The ISL73141SEH is a radiation hardened, high precision, low noise, 14-bit Successive Approximation Register

(SAR) ADC. The device operates from an analog supply voltage range of 3V to 3.6V or 4.5V to 5.5V, a digital

supply voltage range of 2.2V to 3.6V, and has a dedicated reference input (REF). The ISL73141SEH supports

sample rates up to 1Msps with an analog supply voltage range of 4.5V to 5.5V. It also supports sample rates up to

750ksps with an analog supply voltage range of 3V to 3.6V, which allows you to optimize your system based on

the range of the analog signal being sampled. The ISL73141SEH samples at a rate of 1Msps and achieves

excellent dynamic performance (82.1dB SNR, 100dB THD) and linearity (INL ±1LSB, DNL ±0.5 LSB) while still

maintaining a low power consumption of 60mW from a 5V supply. Additionally, the device offers a Sleep mode that

minimizes power consumption to <50µW during idle operation.

The IS73141SEH offers a high-speed serial interface with an independent digital supply (DVCC) range of 2.2V to

3.6V, making it ideal to interface to 2.5V or 3.3V systems. The conversion data is output on the SDO pin with no

latency. The ISL73141SEH supports up to a 50MHz serial data read clock on the SCK input.

The single-ended analog input voltage (AIN) is sampled on the falling edge of CS. The input range of the

ISL73141SEH is determined by the REF pin voltage to GND. The ISL73141SEH supports excellent THD and

SFDR sampling input signal frequencies up to and beyond Nyquist (such as fIN ≥ 500kHz with fSAMP = 1Msps).

Figure 54. Power vs Temperature

Figure 55. Zero and Full Scale Error vs Temperature

Figure 56. PSRR vs Frequency

Unless otherwise noted, AVCC = 3.3V; DVCC = 2.5V; fIN = 105.3kHz; fSAMP = 750ksps; TA = +25°C (Cont.)

24

26

28

30

32

-55 -40 -25 -10

5

20

35

50

65

80

95 110 125

Temperature (°C)

-3.0

-2.0

-1.0

0.0

1.0

2.0

3.0

-55 -40 -25 -10

5

20

35

50

65

80

95 110 125

Temperature (°C)

Average Offset

Average Gain

-85

-80

-75

-70

-65

-60

-55

-50

-45

105

255

505

755

1105

Frequency (kHz)

PSRR (DVCC)

PSRR (AVCC)