ADS1120
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.
What the ADS1120 family does
The ADS1120 is a precision, 16-bit analog-to-digital converter featuring a programmable gain amplifier, internal reference, and dual-matched current sources. It supports data rates up to 2kSPS with 16-bit noise-free resolution at 20SPS, a wide supply range of 2.3V to 5.5V, and low current consumption as low as 120μA in duty-cycle mode. The device offers simultaneous 50Hz and 60Hz rejection and is designed for measuring small sensor signals like RTDs, thermocouples, and thermistors. It is typically used in field transmitters, patient monitoring systems, and factory automation applications. Available in VQFN-16 and TSSOP-16 packages, it operates over a temperature range of –40°C to +125°C.
ADS1120 datasheet parameters
| Parameter | Min | Typ | Max | Conditions | Source |
|---|---|---|---|---|---|
| quiescent current | — | 100 nA | 3 µA | Power-down mode; iavdd; POWER SUPPLY | TI datasheet, p. 8 — 6.5 Electrical Characteristics (continued) |
| supply voltage range | — | 62.5 mV | 250 mV | 6.5 Electrical Characteristics | TI datasheet, p. 8 — 6.5 Electrical Characteristics (continued) |
| rds on | — | 3.5 Ohm | — | ron; LOW-SIDE POWER SWITCH | TI datasheet, p. 8 — 6.5 Electrical Characteristics (continued) |
| operating temperature | -40 °C | — | 125 °C | Operating ambient temperature; ta; TEMPERATURE RANGE | TI datasheet, p. 6 — over operating ambient temperature range (unless otherwise noted) |
| clock frequency | 500 kHz | 4.1 MHz | 4.5 MHz | External clock frequency; fclk; EXTERNAL CLOCK SOURCE | TI datasheet, p. 6 — over operating ambient temperature range (unless otherwise noted) |
| power dissipation | — | 400 µW | — | Duty-cycle mode, PGA disabled; pd; POWER SUPPLY | TI datasheet, p. 8 — 6.5 Electrical Characteristics (continued) |
| propagation delay | 0 s | — | 50 ns | DOUT load = 20pF || 10kΩ to DGND; tp(scdo); 6.7 SPI Switching Characteristics | TI datasheet, p. 9 — 6.7 SPI Switching Characteristics |
| output voltage high | 800 mV | — | — | IOH = 3mA; voh; DIGITAL INPUTS/OUTPUTS | TI datasheet, p. 8 — 6.5 Electrical Characteristics (continued) |
| output voltage low | — | — | 200 mV | IOL = 3mA; vol; DIGITAL INPUTS/OUTPUTS | TI datasheet, p. 8 — 6.5 Electrical Characteristics (continued) |