2.7 V to 5.5 V, 2 ms, 10-Bit ADC in 8-Lead microSOIC/DIP

The AD7810 is a high speed, low power, 10-bit A/D converter that operates from a single 2.7 V to 5.5 V supply. The part contains a 2 µs successive approximation A/D converter, with inherent track/hold functionality, a pseudo differential input and a high speed serial interface that interfaces to most microcontrollers. The AD7810 is fully specified over a temperature range of -40°C to +105°C.

By using a technique that samples the state of the CONVST (convert start) signal at the end of a conversion, the AD7810 may be used in an automatic power-down mode. When used in this mode, the AD7810 automatically powers down at the end of a conversion and "wakes up" at the start of a new conversion. This feature significantly reduces the power consumption of the part at lower throughput rates. The AD7810 can also operate in a high speed mode where the part is not powered down between conversions. In this high speed mode of operation, the conversion time of the AD7810 is 2 µs. The maximum throughput rate is dependent on the speed of the serial interface of the microcontroller.

The part is available in a small 8-pin, 0.3" wide, plastic dual-in-line package (mini-DIP); in an 8-lead, small outline IC (SOIC); and in an 8-lead microSOIC package.

PRODUCT HIGHLIGHTS

* Complete, 10-Bit ADC in 8-Lead Package

The AD7810 is a 10-bit 2.3 µs ADC with inherent track/hold

functionality and a high speed serial interface—all in an

8-lead microSOIC package. VREF may be connected to VDD

to eliminate the need for an external reference. The result is

a high speed, low power, space saving ADC solution.

* Low Power, Single Supply Operation

The AD7810 operates from a single 2.7 V to 5.5 V supply

and typically consumes only 9 mW of power while converting. The power dissipation can be significantly reduced at

lower throughput rates by using the automatic power-down

mode, e.g., at a throughput rate of 10 kSPS the power

consumption is only 270 µW.

* Automatic Power-Down

The automatic power-down mode, whereby the AD7810

powers down at the end of a conversion and “wakes up”

before the next conversion, means the AD7810 is ideal for

battery powered applications. See Power vs. Throughput

Rate section.

* Serial Interface

An easy to use, fast serial interface allows connection to most

popular microprocessors with no external circuitry.

APPLICATIONS

* Low Power, Hand-Held Portable Applications that

Require Analog-to-Digital Conversion with 10-Bit

Accuracy; e.g., Battery Powered Test Equipment,

Battery-Powered Communications Systems

* 10-Bit ADC with 2.3 µs Conversion Time

* Small Footprint 8-Lead microSOIC Package

* Specified Over a –40°C to +105°C Temperature Range

* Inherent Track-and-Hold Functionality

* Operating Supply Range: 2.7 V to 5.5 V

* Specifications at 2.7 V to 5.5 V

* Microcontroller-Compatible Serial Interface