AD7684 is a 16-bit, 100kSPS PulSAR, differential ADC in MSOP package. AD7684 features 16-bit resolution, no missing codes, 100kSPS throughput, ±1LSB typical error, ±3LSB maximum error, ±VREF true differential analog input range (0V to VREF, VREF up to VDD), support single-supply operation (2.7V to 5.5V), SPI®-/QSPI-™/MICROWIRE-™/DSP-compatible serial interface, power dissipation of 4mW@5V, [email protected], 150μ[email protected]/10kSPS, standby current of 1nA. AD7684 is suitable for battery-powered equipment, data acquisition, instrumentation, medical instruments, process control and other applications.
The AD7684 is a 16‑bit, charge‑redistribution successive‑approximation ADC that operates from a single 2.7 V‑5.5 V supply. It offers true differential inputs, a low‑power design, and a serial SPI‑compatible interface. The device is housed in an 8‑lead MSOP package and is rated for –40 °C to +85 °C operation.
The datasheet provides detailed specifications, timing diagrams, pin descriptions, recommended driver amplifiers, layout guidelines, and typical performance graphs. It also includes an application diagram, absolute maximum ratings, and ordering information for designers integrating the AD7684 into battery‑powered, data‑acquisition, instrumentation, or medical equipment.
| Resolution | 16 Bits |
|---|---|
| Throughput Rate | 100 kSPS |
| Supply Voltage | 2.7 V to 5.5 V |
| Power Dissipation (5 V) | 4 mW |
| Standby Current | 1 nA |
| Input Voltage Range | ±VREF (true differential) |
| Operating Temperature | –40 °C to +85 °C |
| Integral Linearity Error (max) | ±3 LSB |
| Signal‑to‑Noise Ratio | 88‑91 dB |
| Effective Number of Bits | 14.8 Bits |
The AD7684 can sample at up to 100 kSPS, with higher rates (250 kSPS, 400 kSPS, up to 500 kSPS) available in other package options.
It operates from a single supply of 2.7 V to 5.5 V.
The standby current is specified as 1 nA.
The differential inputs accept a true differential range of ±VREF.