Features: • 12-Bit plus Sign SAR ADC
• True Bipolar Input Ranges
• Software Selectable Input Ranges
± 10V, ± 5V, ± 2.5V, 0 to 10V
• 500 kSPS Throughput Rate
• Four Analog Input Channels with Channel Sequencer
• Single Ended, True Differential and Pseudo Differential Analog Input Capability
• High Analog Input Impedance
• Low Power: 12 mW
• Full Power Signal Bandwidth: 7 MHz
• Internal 2.5 V Reference
• High Speed Serial Interface SPI/QSPI/DSP/MICROWIRE Compatible
• Power Down Modes
• 16-Lead TSSOP package
• iCMOSTM Process Technology
• For eight and two channel equivalent devices see AD7327 and AD7321 respectively.Pinout
Specifications
| Resolution (Bits) |
13bit |
| T-Put Rate |
500kSPS |
| # Chan |
4 |
| Supply V |
Multi(±12, +5),Multi(±15, +3) ,Multi(±15, +3.3),Multi(±15, +5) |
| Pwr Diss (max) |
17mW |
| Interface |
Ser,SPI |
| Ain Range |
Bip 10V,Bip 2.5V,Bip 5.0V,Uni 10V |
| SNR (dB) |
76dB |
| Pkg Type |
SOP |
VDD to AGND, DGND............................... -0.3 V to +16.5 V
VSS to AGND, DGND.............................. +0.3 V to 16.5 V
VCC to AGND, DGND ......................................-0.3V to +7V
VDRIVE to VCC.................................... -0.3 V to VCC + 0.3V
AGND to DGND......................................... -0.3 V to +0.3 V
Analog Input Voltage to AGND............ VSS -0.5V to VDD +
0.5V
Digital Input Voltage to DGND..................... -0.3 V to +7 V
Digital Output Voltage to GND .......-0.3 V to VDRIVE +0.3V
REFIN to AGND................................... -0.3 V to VCC +0.3V
Input Current to Any Pin Except Supplies1............ ±10mA
Operating Temperature Range.............. -40°C to +85°C
Storage Temperature Range............... -65°C to +150°C
Junction Temperature ..........................................+150°C
TSSOP Package
JA Thermal Impedance................................... 143 °C/W
JC Thermal Impedance..................................... 45 °C/W
Pb-free Temperature, Soldering
Reflow............................................................. 260(+0)°C
ESD............................................................................. TBD
1Transient currents of up to 100 mA will not cause SCR latch-up.
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DescriptionThe AD7323 is a 4-Channel, 12-Bit plus Sign Successive Approximation ADC. The ADC has a high speed serial interface that can operate at throughput rates up to 500 kSPS.
The AD7323 can accept true bipolar Analog Input signals. The AD7323 has four software selectable inputs Ranges, ±10V, ±5V, ±2.5V and 0 to 10V. Each analog input channel can be independently programmed to one of the four input ranges.
The Analog input channels on the AD7323 can be programmed to be Single-Ended, true Differential or Pseudo Differential.
The AD7323 contains a 2.5V Internal reference. The AD7323 also allows for external Reference operation. If a 3V reference is applied the REF IN/OUT pin, the AD7323 can accept a true Bipolar ±12V Analog Input. Minimum VDD and VSS supplies of ±12V are required for the ±12V Input Range.
* Protected by U.S. Patent No. 6,731,232
AD7323 Data Sheet
