Build with CS1238 — Datasheet Specs & AI Design Help

00 — Overview

What the CS1238 does

This is the CS1238 user guide, covering the 24-bit Sigma-Delta ADC and integrated temperature sensor. The document explains chip functions, electrical characteristics, and module descriptions including the analog input, PGA, and SPI communication. It details the SOP-14 and DIP-14 pinouts and provides configuration commands for data output rates and power modes. This manual helps users understand the part family's capabilities and how to implement it in applications requiring precise temperature and voltage measurements.

Next step

Start building with CS1238 → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.

01 — Key specifications

Datasheet parameters

Datasheet parameters for CS1238
Parameter	Min	Typ	Max	Conditions	Source
supply voltage range	3 V	—	5.5 V	VDD, 3.0-3.6 V (typ 3.3 V) or 4.5-5.5 V (typ 5 V)	Chipsea datasheet, p. 8 — 1.6 CS1238 电气特性
operating temperature (abs max)	-40 °C	—	85 °C	CS1238 极限值	Chipsea datasheet, p. 7 — 表1 CS1238 极限值
adc resolution	—	24 bit	—	无失码 (no missing codes)	Chipsea datasheet, p. 8 — 1.6 CS1238 电气特性
sample rate	10 Hz	—	1.28 kHz	SPEED_SEL[1:0]: 00 = 10, 01 = 40, 10 = 640, 11 = 1280 Hz	Chipsea datasheet, p. 14 — 表7 输出速率设置
settling time	3.12 ms	—	300 ms	full settling (DRDY/DOUT held high), 1280 Hz to 10 Hz output rate	Chipsea datasheet, p. 13 — 2.6.1 建立时间
channel count	—	2	—	两路差分输入通道 (two differential input channels)	Chipsea datasheet, p. 6

02 — Alternatives

Closest matches to CS1238

CS1237 2.0× higher settling time, similar adc resolution, similar operating temperature

AD7798BRUZ 2.7× lower sample rate, 1.6× higher settling time, 1.5× lower adc resolution

ADS1114 1.9× higher operating temperature, 1.5× lower adc resolution, 1.3× higher sample rate

LTC2400 1.6× higher operating temperature, 1.1× lower settling time, similar supply voltage range

MCP3421 2.7× lower sample rate, 1.8× higher settling time, 1.3× lower adc resolution

ADS1118 1.9× higher operating temperature, 1.5× lower adc resolution, 1.3× higher sample rate

AD7190BRUZ 5.6× higher settling time, 3.7× higher sample rate, 1.4× higher operating temperature

AD7682BCBZ-RL7 1.5× lower adc resolution, 1.1× lower supply voltage range, similar operating temperature

03 — FAQ

Frequently asked questions

What is the ADC resolution of the CS1238?

The ADC resolution is 24 bit with no missing codes.

What is the channel count for the CS1238?

The CS1238 has a channel count of 2, which corresponds to two differential input channels.

What is the operating temperature of the CS1238?

The operating temperature is 85 °C under the condition of CS1238 极限值.

What is the sample rate when SPEED_SEL[1:0] is set to 11?

The sample rate is 1.28 kHz.

What is the settling time for the CS1238 under full settling (DRDY/DOUT held high) conditions with an output rate from 1280 Hz to 10 Hz?

The settling time is 300 ms.

What is the supply voltage range for the CS1238?

The supply voltage range is 5.5 V, with conditions of VDD, 3.0-3.6 V (typ 3.3 V) or 4.5-5.5 V (typ 5 V).