This document introduces LTC2421/LTC2422 24212f 1-/2-Channel 20-Bit µPower No Latency ∆ΣTMADCs in MSOP-10 and its features.
The LTC2421 (single‑channel) and LTC2422 (dual‑channel) are 20‑bit, low‑latency, delta‑sigma ADCs offered in a 10‑lead MSOP package. They operate from a single supply of 2.7 V to 5.5 V, feature an internal 19.2 kHz oscillator, and provide up to 110 dB of 50 Hz/60 Hz notch rejection. Typical performance includes 4 ppm integral nonlinearity and 1.2 ppm RMS noise.
The manual details pin assignments, absolute maximum ratings, timing diagrams, and typical application circuits such as multi‑channel isolated temperature measurement. It also lists related parts and ordering information for the MSOP package.
| Resolution | 20 bits |
|---|---|
| Supply Voltage | 2.7 V to 5.5 V |
| Conversion Mode Current | 200 pA to 300 pA |
| Sleep Mode Current | 20 pA to 30 pA |
| Internal Oscillator Frequency | 19.2 kHz |
| External Oscillator Frequency Range | 2.56 kHz to 307.2 kHz |
| Normal Mode Rejection (50 Hz) | 110 dB |
| Output Noise | 6 µV rms |
Both devices provide a 20‑bit resolution.
They operate from 2.7 V up to 5.5 V.
The conversion mode current is between 200 pA and 300 pA.
The internal oscillator runs at 19.2 kHz.