The ADC3681, 82, 83 (ADC368x) is a low noise, ultra-low power 18-bit 65 MSPS high-speed dual channel ADC family. Designed for lowest noise performance, it delivers a noise spectral density of -160 dBFS/Hz combined with excellent linearity and dynamic range. The ADC368x offers excellent DC precision together with IF sampling support which makes it suited for a wide range of applications. High-speed control loops benefit from the short latency as low as only 1 clock cycle. The ADC consumes only 94 mW/ch at 65 Msps and its power consumption scales well with lower sampling rates.
The ADC368x uses a serial LVDS (SLVDS) interface to output the data which minimizes the number of digital interconnects. The device supports two-lane, one-lane and half-lane options. The ADC36xx is a pin to pin compatible family of ADCs with 16 and 18-bit resolution and different speed grades. It comes in a 40-pin QFN package (5 x 5mm) and supports the extended industrial temperature range from -40 to +105⁰C.
PART NUMBER | PACKAGE(1) | BODY SIZE (NOM) |
---|---|---|
ADC368x | VQFN (40) | 5.00 mm x 5.00 mm |
PART NUMBER | RESOLUTION | SAMPLING RATE |
---|---|---|
ADC3683 | 18 BIT | 65 MSPS |
ADC3682 | 18 BIT | 25 MSPS |
ADC3681 | 18 BIT | 10 MSPS |
Changes from Revision A (December 2021) to Revision B (October 2022)
Changes from Revision * (December 2020) to Revision A (December 2021)
PIN | I/O | Description | |
---|---|---|---|
Name | No. | ||
INPUT/REFERENCE | |||
AINP | 12 | I | Positive analog input, channel A |
AINM | 13 | I | Negative analog input, channel A |
BINP | 39 | I | Positive analog input, channel B |
BINM | 38 | I | Negative analog input, channel B |
VCM | 8 | O | Common-mode voltage output for the analog inputs, 0.95V |
VREF | 2 | I | External voltage reference input, 1.6V |
REFBUF | 4 | I | 1.2V external voltage reference input for use with internal reference buffer. Internal 100 kΩ pull-up resistor to AVDD. This pin is also used to configure default operating conditions. |
REFGND | 3 | I | Reference ground input, 0V |
CLOCK | |||
CLKP | 6 | I | Positive differential sampling clock input for the ADC |
CLKM | 7 | I | Negative differential sampling clock input for the ADC |
CONFIGURATION | |||
PDN/SYNC | 1 | I | Power down/Synchronization input. This pin can be configured via the SPI interface. Active high. This pin has an internal 21 kΩ pull-down resistor. |
RESET | 9 | I | Hardware reset. Active high. This pin has an internal 21 kΩ pull-down resistor. |
SEN | 16 | I | Serial interface enable. Active low. This pin has an internal 21 kΩ pull-up resistor to AVDD. |
SCLK | 35 | I | Serial interface clock input. This pin has an internal 21 kΩ pull-down resistor. |
SDIO | 10 | I/O | Serial interface data input and output. This pin has an internal 21 kΩ pull-down resistor. |
NC | 27 | - | Do not connect |
DIGITAL INTERFACE | |||
DA0P | 20 | O | Positive differential serial LVDS output for lane 0, channel A |
DA0M | 19 | O | Negative differential serial LVDS output for lane 0, channel A |
DA1P | 18 | O | Positive differential serial LVDS output for lane 1, channel A |
DA1M | 17 | O | Negative differential serial LVDS output for lane 1, channel A |
DB0P | 31 | O | Positive differential serial LVDS output for lane 0, channel B |
DB0M | 32 | O | Negative differential serial LVDS output for lane 0, channel B |
DB1P | 33 | O | Positive differential serial LVDS output for lane 1, channel B |
DB1M | 34 | O | Negative differential serial LVDS output for lane 1, channel B |
DCLKP | 23 | O | Positive differential serial LVDS bit clock output. |
DCLKM | 22 | O | Negative differential serial LVDS bit clock output. |
FCLKP | 28 | O | Positive differential serial LVDS frame clock output. |
FCLKM | 29 | O | Negative differential serial LVDS frame clock output. |
DCLKINP | 25 | I | Positive differential serial LVDS bit clock input. Internal 100 Ω differential termination. |
DCLKINM | 24 | I | Negative differential serial LVDS bit clock input. Internal 100 Ω differential termination. |
POWER SUPPLY | |||
AVDD | 5,15,36 | I | Analog 1.8V power supply |
GND | 11,14,37,40, PowerPad | I | Ground, 0V |
IOVDD | 21,30 | I | 1.8V power supply for digital interface |
IOGND | 26 | I | Ground, 0V for digital interface |