DDC114IRTCR
ActiveDDC114: QUAD CURRENT INPUT 20-BIT ANALOG-TO-DIGITAL CONVERTER
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DDC114IRTCR
ActiveDDC114: QUAD CURRENT INPUT 20-BIT ANALOG-TO-DIGITAL CONVERTER
Technical Specifications
Parameters and characteristics for this part
| Specification | DDC114IRTCR |
|---|---|
| Architecture | Sigma-Delta |
| Configuration | ADC |
| Data Interface | SPI |
| Features | Simultaneous Sampling |
| Input Type | Single Ended |
| Mounting Type | Surface Mount |
| Number of A/D Converters | 2 |
| Number of Bits | 20 |
| Number of Inputs | 4 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 48-VFQFN Exposed Pad |
| Reference Type | External |
| Sampling Rate (Per Second) | 3.125 k |
| Supplier Device Package | 48-VQFN (7x7) |
| Voltage - Supply, Analog | 5 V |
| Voltage - Supply, Digital [Max] | 5.25 V |
| Voltage - Supply, Digital [Min] | 2.7 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 2500 | $ 24.63 | |
| Texas Instruments | LARGE T&R | 1 | $ 29.62 | |
| 100 | $ 26.33 | |||
| 250 | $ 21.64 | |||
| 1000 | $ 19.36 | |||
Description
General part information
DDC114 Series
The DDC114 is a 20-bit quad channel, current-input analog-to-digital (A/D) converter. It combines both current-to-voltage and A/D conversion so that four low-level current output devices, such as photodiodes, can be directly connected to its inputs and digitized.
For each of the four inputs, the DDC114 provides a dual-switched integrator front-end. This design allows for continuous current integration: while one integrator is being digitized by the onboard A/D converter, the other is integrating the input current. Adjustable full-scale ranges from 12pC to 350pC and adjustable integration times from 50µs to 1s allow currents from fAs to µAs to be measured with outstanding precision. Low-level linearity is ±0.5ppm of the full-scale range and noise is 5.2ppm of the full-scale range.
Two modes of operation are provided. In Low-Power mode, total power dissipation is only 13.5mW per channel with a maximum data rate of 2.5kSPS. High-Speed mode supports data rates up to 3.125kSPS with a corresponding dissipation of 18mW per channel.
Documents
Technical documentation and resources