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Technical Specifications
Parameters and characteristics for this part
| Specification | AD7985BCPZ |
|---|---|
| Architecture | SAR |
| Configuration | S/H-ADC |
| Data Interface | DSP, SPI |
| Input Type | Pseudo-Differential |
| Mounting Type | Surface Mount |
| Number of A/D Converters | 1 |
| Number of Bits | 16 |
| Number of Inputs | 1 |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 20-WFQFN Exposed Pad, CSP |
| Ratio - S/H:ADC | 1:1 |
| Reference Type | External, Internal |
| Sampling Rate (Per Second) | 2.5 M |
| Supplier Device Package | 20-LFCSP (4x4) |
| Voltage - Supply, Analog [Max] | 2.625 V |
| Voltage - Supply, Analog [Min] | 2.375 V |
| Voltage - Supply, Digital [Max] | 2.625 V |
| Voltage - Supply, Digital [Min] | 2.375 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tray | 1 | $ 40.87 | |
| 10 | $ 31.12 | |||
| 25 | $ 28.63 | |||
| 80 | $ 26.23 | |||
| 230 | $ 25.45 | |||
Description
General part information
AD7985 Series
The AD7985 is a 16-bit, 2.5 MSPS successive approximation analog-to-digital converter (SAR ADC). It contains a low power, high speed, 16-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and a versatile serial interface port. On the rising edge of CNV, the AD7985 samples an analog input, IN+, between 0 V and REF with respect to a ground sense, IN−. The AD7985 features a very high sampling rate turbo mode (TURBO is high) and a reduced power normal mode (TURBO is low) for low power applications where the power is scaled with the throughput.In normal mode (TURBO is low), the SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus and provide an optional busy indicator. It is compatible with 1.8 V, 2.5 V, and 2.7 V supplies using the separate VIO supply.The AD7985 is available in a 20-lead LFCSP with operation specified from −40°C to +85°C.ApplicationsBattery-powered equipmentCommunicationsATEData acquisition systemsMedical instruments