data converters

ADS1246

Every spec below is cited to the manufacturer datasheet. Pick your exact ordering code, compare the closest alternatives, then ask the assistant what it means for your design.

00 — Overview

What the ADS1246 family does

The ADS1246, ADS1247, and ADS1248 are precision 24-bit analog-to-digital converters designed for sensor measurement applications. These devices feature a programmable gain amplifier, a low-noise delta-sigma ADC with single-cycle settling, and an internal 2.048-V reference with 10 ppm/°C maximum drift. The family supports data rates up to 2 kSPS and includes simultaneous 50-Hz and 60-Hz rejection at 20 SPS. The ADS1248 provides eight input channels, while the ADS1247 offers four, and the ADS1246 supports two. They typically measure temperature sensors like RTDs and thermocouples, as well as pressure and flow meters. The converters operate on a 2.7V to 5.25V analog supply and include features like sensor burn-out detection and programmable excitation current sources for resistive bridge sensors.

Next step
Start building with ADS1246 → 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.
Ordering code:
01 — Key specifications

ADS1246 datasheet parameters

ParameterMinTypMaxConditionsSource
quiescent current 100 nA — — Power-down mode; iavdd; POWER SUPPLY TI datasheet, p. 10 — Electrical Characteristics (continued)
output voltage 118 mV — — TA = 25°C; TEMPERATURE SENSOR TI datasheet, p. 10 — Electrical Characteristics (continued)
output current -10 mA — 10 mA Internal Voltage Reference TI datasheet, p. 9 — 7.5 Electrical Characteristics
supply voltage range 2.7 V — 5.25 V TI datasheet, p. 8 — 7.3 Recommended Operating Conditions
input offset voltage -15 µV — 15 µV After calibration(1); vio(input referred); System Performance TI datasheet, p. 9 — 7.5 Electrical Characteristics
cmrr 80 dB 90 dB — At DC, Gain = 1; cmrr; System Performance TI datasheet, p. 9 — 7.5 Electrical Characteristics
operating temperature -40 °C — 105 °C TEMPERATURE RANGE TI datasheet, p. 8 — 7.3 Recommended Operating Conditions
clock frequency 1 MHz — 4.5 MHz fclk; EXTERNAL CLOCK INPUT(4) TI datasheet, p. 8 — 7.3 Recommended Operating Conditions
power dissipation 2.3 mW — — AVDD = DVDD = 5 V, DR = 20 SPS, internal oscillator, external reference; pd; POWER SUPPLY TI datasheet, p. 10 — Electrical Characteristics (continued)
propagation delay — — 10 ns tcsdo; 7.7 Switching Characteristics TI datasheet, p. 11 — 7.7 Switching Characteristics
psrr 100 dB 135 dB — AVDD / DVDD at DC, Gain = 32, DR = 80 SPS; psrr; System Performance TI datasheet, p. 9 — 7.5 Electrical Characteristics
adc resolution — 24 bit — TI datasheet, p. 4 — 5 Device Comparison Table
sample rate — 2 kHz — TI datasheet, p. 9 — 7.5 Electrical Characteristics
settling time — 70 µs — TI datasheet, p. 33 — Table 11. Internal Reference Settling Time
channel count — 1 — TI datasheet, p. 4 — 5 Device Comparison Table
01 — Key specifications

ADS1247 datasheet parameters

ParameterMinTypMaxConditionsSource
quiescent current 100 nA — — Power-down mode; iavdd; POWER SUPPLY TI datasheet, p. 10 — Electrical Characteristics (continued)
output voltage 118 mV — — TA = 25°C; TEMPERATURE SENSOR TI datasheet, p. 10 — Electrical Characteristics (continued)
output current -10 mA — 10 mA Internal Voltage Reference TI datasheet, p. 9 — 7.5 Electrical Characteristics
supply voltage range 2.7 V — 5.25 V TI datasheet, p. 8 — 7.3 Recommended Operating Conditions
input offset voltage -15 µV — 15 µV After calibration(1); vio(input referred); System Performance TI datasheet, p. 9 — 7.5 Electrical Characteristics
cmrr 80 dB 90 dB — At DC, Gain = 1; cmrr; System Performance TI datasheet, p. 9 — 7.5 Electrical Characteristics
operating temperature -40 °C — 105 °C TEMPERATURE RANGE TI datasheet, p. 8 — 7.3 Recommended Operating Conditions
clock frequency 1 MHz — 4.5 MHz fclk; EXTERNAL CLOCK INPUT(4) TI datasheet, p. 8 — 7.3 Recommended Operating Conditions
power dissipation 2.3 mW — — AVDD = DVDD = 5 V, DR = 20 SPS, internal oscillator, external reference; pd; POWER SUPPLY TI datasheet, p. 10 — Electrical Characteristics (continued)
propagation delay — — 10 ns tcsdo; 7.7 Switching Characteristics TI datasheet, p. 11 — 7.7 Switching Characteristics
psrr 100 dB 135 dB — AVDD / DVDD at DC, Gain = 32, DR = 80 SPS; psrr; System Performance TI datasheet, p. 9 — 7.5 Electrical Characteristics
adc resolution — 24 bit — TI datasheet, p. 4 — 5 Device Comparison Table
sample rate — 2 kHz — TI datasheet, p. 9 — 7.5 Electrical Characteristics
settling time — 70 µs — TI datasheet, p. 33 — Table 11. Internal Reference Settling Time
01 — Key specifications

ADS1248 datasheet parameters

ParameterMinTypMaxConditionsSource
quiescent current 100 nA — — Power-down mode; iavdd; POWER SUPPLY TI datasheet, p. 10 — Electrical Characteristics (continued)
output voltage 118 mV — — TA = 25°C; TEMPERATURE SENSOR TI datasheet, p. 10 — Electrical Characteristics (continued)
output current -10 mA — 10 mA Internal Voltage Reference TI datasheet, p. 9 — 7.5 Electrical Characteristics
supply voltage range 2.7 V — 5.25 V TI datasheet, p. 8 — 7.3 Recommended Operating Conditions
input offset voltage -15 µV — 15 µV After calibration(1); vio(input referred); System Performance TI datasheet, p. 9 — 7.5 Electrical Characteristics
cmrr 80 dB 90 dB — At DC, Gain = 1; cmrr; System Performance TI datasheet, p. 9 — 7.5 Electrical Characteristics
operating temperature -40 °C — 105 °C TEMPERATURE RANGE TI datasheet, p. 8 — 7.3 Recommended Operating Conditions
clock frequency 1 MHz — 4.5 MHz fclk; EXTERNAL CLOCK INPUT(4) TI datasheet, p. 8 — 7.3 Recommended Operating Conditions
power dissipation 2.3 mW — — AVDD = DVDD = 5 V, DR = 20 SPS, internal oscillator, external reference; pd; POWER SUPPLY TI datasheet, p. 10 — Electrical Characteristics (continued)
propagation delay — — 10 ns tcsdo; 7.7 Switching Characteristics TI datasheet, p. 11 — 7.7 Switching Characteristics
psrr 100 dB 135 dB — AVDD / DVDD at DC, Gain = 32, DR = 80 SPS; psrr; System Performance TI datasheet, p. 9 — 7.5 Electrical Characteristics
adc resolution — 24 bit — TI datasheet, p. 4 — 5 Device Comparison Table
sample rate — 2 kHz — TI datasheet, p. 9 — 7.5 Electrical Characteristics
settling time — 70 µs — TI datasheet, p. 33 — Table 11. Internal Reference Settling Time
03 — Alternatives

Closest matches to ADS1246

ADS1220 5.7× lower power dissipation, 2.0× lower propagation delay, 1.5× higher clock frequency
CS5530-IS 1.9× higher sample rate, 1.9× lower operating temperature, 1.8× higher clock frequency
ADS131M02 16.1× higher sample rate, 4.6× higher settling time, 3.0× higher clock frequency
ADS131M02IPWR 16.1× higher sample rate, 4.6× higher settling time, 3.0× higher clock frequency
ADS1255 16.5× higher power dissipation, 15.0× higher sample rate, 3.0× higher settling time
ADS1110A0IDBVR 8.3× lower sample rate, 2.0× lower quiescent current, 1.9× lower power dissipation
MCP3421 8.3× lower sample rate, 1.9× lower operating temperature, 1.4× lower psrr
HX711 4.0× higher clock frequency, 1.9× lower operating temperature, 1.4× lower psrr
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