Features: Fast Throughput Rate: 1 MSPS
Specified for VDDof 2.35V to 5.25V
Low Power:
3.6 mW Typ at 1 MSPS with 3 V Supplies
15 mW Typ at 1 MSPS with 5 V Supplies
Wide Input Bandwidth:
70 dB SNR at 100 kHz Input Frequency
Flexible Power/Serial Clock Speed Management
No Pipeline Delays
ApplicationBattery-Powered Systems
Personal Digital Assistants
Medical Instruments
Mobile Communications
Instrumentation and Control Systems
Data Acquisition Systems
High Speed Modems
Optical SensorsPinout
Specifications
| Resolution (Bits) |
12bit |
| T-Put Rate |
1MSPS |
| # Chan |
1 |
| Supply V |
Single(+3),Single(+3.3),Single(+5) |
| Pwr Diss (max) |
17.5mW |
| Interface |
Ser,SPI |
| Ain Range |
Uni Vdd |
| SNR (dB) |
72.5dB |
| Pkg Type |
SOT |
VDDto 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 Versions) . . . . . . . . . . ....... 40°C to +85°C
Military (S Version) . . . . . . . . . . . . . . . . .... . 55°C to +125°C
Storage Temperature Range . . . . . . . . . . . 65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . .. . . .150°C
SOT-23 Package
JAThermal Impedance . . . . . . . . . . . . . . . . . . .... . . 230°C/W
JCThermal Impedance . . . . . . . . . . . . . . . . . . . . . ..... 92°C/W
Lead Temperature, Soldering
Reflow (10 sec to 30 sec) . . . . . . . . . . . . . . ..... . 235 (0/+5)°C
Pb-Free Temperature Soldering
Reflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....... . 255 (0/+5)°C
ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . 3.5 kV
DescriptionThe AD7476/AD7477/AD7478 are, respectively, 12-bit, 10-bit, and 8-bit, high speed, low power, successive-approximation ADCs. The parts operate from a single 2.35 V to 5.25 V powersupply and feature throughput rates up to 1 MSPS. The parts contain a low noise, wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 6 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 AD7476/AD7477/AD7478 use advanced design techniques to achieve very low power dissipation at high throughput rates.
The reference for the part is taken internally from VDD. This allows the widest dynamic input range to the ADC. Thus the analog input range for the part is 0 V to VDD. The conversion rate is determined by the SCLK.
The AD7476/AD7477/AD7478* are, respectively, 12-bit, 10-bit, and 8-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
AD7476 Data Sheet
