LTC2440IGN#PBF

LTC®2440 is a high speed 24-bit no latency ∆∑TM ADC with 5ppm INL and 5µV offset. It uses a proprietary delta-sigma architecture enabling variable speed and resolution with no latency. The accuracy (offset, full-scale, linearity, drift) and power dissipation are independent of the speed selected. Since there is no latency, a speed/resolution change may be made between conversions with no degradation in performance. It automatically enters a low power sleep state. Power dissipation may be reduced by increasing the duration of this sleep state. For example, running at the 3.5KHz conversion speed but reading data at a 100Hz rate draws 240µA average current (1.1mW) while reading data at a 7Hz output rate draws only 25µA (125µW). Typical applications are high speed multiplexing, weight scales, auto ranging 6-digit DVMs, direct temperature measurement, high speed data acquisition.

• Up to 3.5KHz output rate (external fO), selectable speed/resolution
• 0.0005% INL, no missing codes
• Autosleep enables 20µA operation at 6.9Hz, <lt/>5µV offset
• Differential input and differential reference with GND to VCC common mode range
• No latency, each conversion is accurate even after an input step
• Internal oscillator—no external components, pin compatible with the LTC2410
• Offset error is 2.5µV (2.5V ≤ REF+ ≤ VCC, REF–=GND, GND ≤ IN+=IN– ≤ VCC, TA=25°C)
• Narrow 16-lead SSOP package
• Temperature rating range from -40°C to 85°C

Merknader

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