AD7920

Throughput Rate: 250 kSPS
Specified for VDD of 2.35 V to 5.25 V
Low Power 3.6 mW Typ at 250 kSPS with 3 V Supplies
12.5 mW Typ at 250 kSPS with 5 V Supplies
Wide Input Bandwidth:
71 dB SNR at 100 kHz Input Frequency
Flexible Power/Serial Clock Speed Management
No Pipeline Delays
High Speed Serial Interface
SPI
®/QSPI™/MICROWIRE™/DSP Compatible
Standby Mode: 1
A Max
6-Lead SC70 Package
8-Lead MSOP Package

VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +7 V
Analog Input Voltage to GND . . . . . . . 0.3 V to VDD + 0.3 V
Digital Input Voltage to GND . . . . . . . . . . . . . 0.3 V to +7 V
Digital Output Voltage to GND . . . . . . 0.3 V to VDD + 0.3 V
Input Current to Any Pin Except Supplies2
. . . . . . . . ±10 mA
Operating Temperature Range
Commercial (A, B Grade) . . . . . . . . . . . . . . 40C to +85C
Storage Temperature Range . . . . . . . . . .65C to +150C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . .150C
MSOP Package
qJA Thermal Impedance . . . . . . . . . . . . . . . . . . . 205.9C/W
q Thermal Impedance . . . . . . . . . . . . . . . . . . . . 43.74C/W

The AD7910/AD7920 are, respectively, 10-bit and 12-bit, high speed, low power, successive-approximation ADCs. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 250 kSPS. The parts contain a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 13 MHz.

The conversion process and data acquisition are controlled using CS and the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and the conversion is also initiated at this point. There are no pipeline delays associated with the part.

The AD7910/AD7920 use advanced design techniques to achieve very low power dissipation at high throughput rates.