Datasheet AD7810 (Analog Devices)

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2.7 V to 5.5 V, 2.3
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s, 10-Bit ADC in 8-Lead microSOIC/DIP AD7810 FEATURES FUNCTIONAL BLOCK DIAGRAM 10-Bit ADC with 2.3
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s Conversion Time V Small Footprint 8-Lead microSOIC Package DD AGND VREF Specified Over a –40
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C to +105
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C Temperature Range AD7810 Inherent Track-and-Hold Functionality CHARGE DOUT SERIAL REDISTRIBUTION PORT Operating Supply Range: 2.7 V to 5.5 V DAC SCLK Specifications at 2.7 V to 5.5 V CLOCK Microcontroller-Compatible Serial Interface OSC Optional Automatic Power-Down VIN+ at End of Conversion CONTROL Low Power Operation VIN– COMP LOGIC VDD/3 270
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W at 10 kSPS Throughput Rate 2.7 mW at 100 kSPS Throughput Rate Analog Input Range: 0 V to VREF CONVST Reference Input Range: 0 V to VDD 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 GENERAL DESCRIPTION PRODUCT HIGHLIGHTS
The AD7810 is a high speed, low power, 10-bit A/D con- 1. Complete, 10-Bit ADC in 8-Lead Package verter that operates from a single 2.7 V to 5.5 V supply. The The AD7810 is a 10-bit 2.3 µs ADC with inherent track/hold part contains a 2.3 µs successive approximation A/D converter, functionality and a high speed serial interface—all in an with inherent track/hold functionality, a pseudo differential 8-lead microSOIC package. VREF may be connected to VDD input and a high speed serial interface that interfaces to most to eliminate the need for an external reference. The result is microcontrollers. The AD7810 is fully specified over a tem- a high speed, low power, space saving ADC solution. perature range of –40°C to +105°C. 2. Low Power, Single Supply Operation By using a technique that samples the state of the CONVST The AD7810 operates from a single 2.7 V to 5.5 V supply (convert start) signal at the end of a conversion, the AD7810 and typically consumes only 9 mW of power while convert- may be used in an automatic power-down mode. When used in ing. The power dissipation can be significantly reduced at this mode, the AD7810 automatically powers down at the end lower throughput rates by using the automatic power-down of a conversion and “wakes up” at the start of a new conversion. mode, e.g., at a throughput rate of 10 kSPS the power This feature significantly reduces the power consumption of the consumption is only 270 µW. part at lower throughput rates. The AD7810 can also operate in 3. Automatic Power-Down a high speed mode where the part is not powered down between The automatic power-down mode, whereby the AD7810 conversions. In this high speed mode of operation, the conver- powers down at the end of a conversion and “wakes up” sion time of the AD7810 is 2.3 µs. The maximum throughput before the next conversion, means the AD7810 is ideal for rate is dependent on the speed of the serial interface of the battery powered applications. See Power vs. Throughput microcontroller. Rate section. The part is available in a small 8-lead, 0.3" wide, plastic dual- 4. Serial Interface in-line package (mini-DIP); in an 8-lead, small outline IC An easy to use, fast serial interface allows connection to most (SOIC); and in an 8-lead microSOIC package. popular microprocessors with no external circuitry. REV. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties
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