Analog Devices

The AD7903 is a dual 16-bit, successive approximation, analog-to-digital converter (ADC) that operates from a single power supply, VDDx, per ADC. It contains two low power, high speed, 16-bit sampling ADCs and a versatile serial interface port. On the CNVx rising edge, the AD7903 samples the voltage difference between the INx+ and INx− pins. The voltages on these pins usually swing in opposite phases between 0 V and VREF. The externally applied reference voltage of the REFx pins (VREF) can be set independently from the supply voltage pins, VDDx. The power of the device scales linearly with throughput.Using the SDIx inputs, the SPI-compatible serial interface can also daisy-chain multiple ADCs on a single 3-wire bus and provide an optional busy indicator. It is compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate VIOx supplies.The AD7903 is available in a 20-lead QSOP package with operation specified from −40°C to +125°C.APPLICATIONSBattery-powered equipmentCommunicationsAutomated test equipment (ATE)Data acquisitionMedical instrumentationRedundant measurementSimultaneous sampling

The AD7904 /AD7914/AD7924are, respectively, 8-bit, 10-bit, and 12-bit, high speed, low power, 4-channel successive approximation ADCs. The parts operate from a single 2.7 V to 5.25 V power supply 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 8 MHz.The conversion process and data acquisition are controlled usingCSand the serial clock signal, allowing the device to easily inter-face with microprocessors or DSPs. The input signal is sampled on the falling edge ofCSand conversion is also initiated at this point. There are no pipeline delays associated with the part.The AD7904 / AD7914 / AD7924 use advanced design techniques to achieve very low power dissipation at maximum throughput rates. At maximum throughput rates, the AD7904 / AD7914 / AD7924 consume 2 mA maximum with 3 V supplies; with 5 V supplies, the current consumption is 2.7 mA maximum.Through the configuration of the control register, the analog input range for the part can be selected as 0 V to REFINor 0 V to 2 × REFIN, with either straight binary or twos complement output coding. The AD7904 / AD7914 / AD7924 each feature four single-ended analog inputs with a channel sequencer to allow a pre-programmed selection of channels to be converted sequentially.The conversion time for the AD7904 / AD7914 / AD7924 is determined by the SCLK frequency, which is also used as the master clock to control the conversion.PRODUCT HIGHLIGHTSHigh Throughput with Low Power Consumption.The AD7904/AD7914/AD7924 offer throughput rates up to 1 MSPS. At the maximum throughput rate with 3 V supplies, the AD7904/AD7914/AD7924 dissipate only 6 mW of power maximum.Four Single-Ended Inputs with Channel Sequencer.A consecutive sequence of channels can be selected, through which the ADC will cycle and convert on.Single-Supply Operation with VDRIVEFunction.The AD7904/AD7914/AD7924 operate from a single 2.7 V to 5.25 V supply. The VDRIVEfunction allows the serial interface to connect directly to 3 V or 5 V processor systems, independent of VDD.Flexible Power/Serial Clock Speed Management.The conversion rate is determined by the serial clock, allowing the conversion time to be reduced by increasing the serial clock speed. The parts also feature two shutdown modes to maximize power efficiency at lower throughput rates. Current consumption is 0.5 µA maximum when in full shutdown.No Pipeline Delay.The parts feature a standard successive approximation ADC with accurate control of the sampling instant via theCSinput and once-off conversion control.

The AD7908 /AD7918/AD7928are, respectively, 8-bit, 10-bit, and 12-bit, high speed, low power, 8-channel, successive approximation ADCs. The parts operate from a single 2.7 V to 5.25 V power supply 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 8 MHz.The conversion process and data acquisition are controlled usingCSand the serial clock signal, allowing the device to easily interface with microprocessors or DSPs. The input signal is sampled on the falling edge ofCSand conversion is also initiated at this point. There are no pipeline delays associated with the part.The AD7908 / AD7918 / AD7928 use advanced design techniques to achieve very low power dissipation at maximum throughput rates. At maximum throughput rates, the AD7908 / AD7918 / AD7928 consume 2 mA maximum with 3 V supplies; with 5 V supplies, the current consumption is 2.7 mA maximum.Through the configuration of the control register, the analog input range for the part can be selected as 0 V to REFINor 0 V to 2 × REFIN, with either straight binary or twos complement output coding. The AD7908 / AD7918 / AD7928 each feature eight single-ended analog inputs with a channel sequencer to allow a preprogrammed selection of channels to be converted sequentially.The conversion time for the AD7908 / AD7918 / AD7928 is determined by the SCLK frequency, which is also used as the master clock to control the conversion.PRODUCT HIGHTLIGHTSHigh Throughput with Low Power Consumption. The AD7908 / AD7918 / AD7928 offer up to 1 MSPS throughput rates. At the maximum throughput rate with 3 V supplies, the AD7908 / AD7918 / AD7928 dissipate just 6 mW of power maximum.Eight Single-Ended Inputs with a Channel Sequencer. A sequence of channels can be selected, through which the ADC cycles and converts on.Single-Supply Operation with VDRIVEFunction. The AD7908 / AD7918 / AD7928 operate from a single 2.7 V to 5.25 V supply. The VDRIVEfunction allows the serial interface to connect directly to either 3 V or 5 V processor systems independent of AVDD.Flexible Power/Serial Clock Speed Management. The conversion rate is determined by the serial clock, allowing the conversion time to be reduced through the serial clock speed increase. The parts also feature various shutdown modes to maximize power efficiency at lower throughput rates. Current consumption is 0.5 μA max when in full shutdown.No Pipeline Delay. The parts feature a standard successive approximation ADC with accurate control of the sampling instant via aCSinput and once off conversion control.

The AD7910 /AD7920are 10-bit and 12-bit, high speed, low power, successive-approximation ADCs respectively. 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/hold amplifier, which can handle input frequencies in excess of 6 MHz.The conversion process and data acquisition are controlled usingCSand the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge ofCSand the conversion is also initiated at this point. There are no pipelined delays associated with the part.The AD7910 / AD7920 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 to VDD. The conversion rate is determined by the SCLK.PRODUCT HIGHLIGHTS10-/12-bit ADCs in SC70 and MSOP packages.Low power consumption.Flexible power/serial clock speed management. The conversion rate is determined by the serial clock, allowing the conversion time to be reduced through the serial clock speed increase. This allows the average power consumption to be reduced when power-down mode is used while not converting. The part also features a power-down mode to maximize power efficiency at lower throughput rates. Current consumption is 1 μA maximum and 50 nA typically when in power-down mode.Reference derived from the power supply.No pipeline delay. The parts feature a standard successive approximation ADC with accurate control of the sampling instant via a CS input and once-off conversion control.APPLICATIONSBattery-powered systemsPersonal digital assistantsMedical instrumentsMobile communicationsInstrumentation and control systemsData acquisition systemsHigh speed modemsOptical sensors

The AD7911 /AD7921are 10-bit and 12-bit, high speed, low power, 2-channel, successive-approximation ADCs respectively. 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/hold amplifier, which can handle input frequencies in excess of 6 MHz. The conversion process and data acquisition are controlled usingCSand the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge ofCSand the conversion is also initiated at this point. There are no pipeline delays associated with the part.The channel to be converted is selected through the DIN pin and the mode of operation is controlled byCS. The serial data stream from the DOUT pin has a channel identifier bit, which provides information about the converted channel.The AD7911 / AD7921 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 to VDD. The conversion rate is determined by the SCLK signal.PRODUCT HIGHLIGHTS2-channel, 250 kSPS, 10-/12-bit ADCs in TSOT package.Low power consumption.Flexible power/serial clock speed management. The conversion rate is determined by the serial clock; conversion time is reduced when the serial clock speed is increased. The parts also feature a power-down mode to maximize power efficiency at lower throughput rates. Average power consumption is reduced when the power-down mode is used while not converting. Current consumption is 1 μA maximum and 50 nA typically when in power-down mode.Reference derived from the power supply.No pipeline delay.The parts feature a standard successive approximation ADC with accurate control of the sampling instant via aCSinput and once-off conversion control.APPLICATIONSBattery-powered systems:Personal digital assistantsMedical instrumentsMobile communicationsInstrumentation and control systemsData acquisition systemsHigh speed modemsOptical sensors

The AD7915/AD7916 are 16-bit, successive approximation, analog-to-digital converters (ADCs) that operate from a single power supply, VDD. They contain a low power, high speed, 16-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, the AD7915/AD7916 sample the voltage difference between the IN+ and IN− pins. The voltages on these pins typically swing in opposite phases between 0 V and VREF. The reference voltage, REF, is applied externally and can be set independent of the supply voltage, VDD. The power consumption of the AD7915/AD7916 scales linearly with throughput.The AD7915/AD7916 are serial peripheral interface (SPI) compatible, which features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus. They are compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic using the separate VIO supply.The AD7915/AD7916 are available in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +125°C.APPLICATIONSAutomated test equipmentData acquisition systemsMedical instrumentsMachine automation

The AD7915/AD7916 are 16-bit, successive approximation, analog-to-digital converters (ADCs) that operate from a single power supply, VDD. They contain a low power, high speed, 16-bit sampling ADC and a versatile serial interface port. On the CNV rising edge, the AD7915/AD7916 sample the voltage difference between the IN+ and IN− pins. The voltages on these pins typically swing in opposite phases between 0 V and VREF. The reference voltage, REF, is applied externally and can be set independent of the supply voltage, VDD. The power consumption of the AD7915/AD7916 scales linearly with throughput.The AD7915/AD7916 are serial peripheral interface (SPI) compatible, which features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus. They are compatible with 1.8 V, 2.5 V, 3 V, and 5 V logic using the separate VIO supply.The AD7915/AD7916 are available in a 10-lead MSOP or a 10-lead LFCSP with operation specified from −40°C to +125°C.APPLICATIONSAutomated test equipmentData acquisition systemsMedical instrumentsMachine automation

The AD7908 / AD7918 / AD7928 are, respectively, 8-bit, 10-bit, and 12-bit, high speed, low power, 8-channel, successive approximation ADCs. The parts operate from a single 2.7 V to 5.25 V power supply 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 8 MHz.The conversion process and data acquisition are controlled usingCSand the serial clock signal, allowing the device to easily interface with microprocessors or DSPs. The input signal is sampled on the falling edge ofCSand conversion is also initiated at this point. There are no pipeline delays associated with the part.The AD7908 / AD7918 / AD7928 use advanced design techniques to achieve very low power dissipation at maximum throughput rates. At maximum throughput rates, the AD7908 / AD7918 / AD7928 consume 2 mA maximum with 3 V supplies; with 5 V supplies, the current consumption is 2.7 mA maximum.Through the configuration of the control register, the analog input range for the part can be selected as 0 V to REFINor 0 V to 2 × REFIN, with either straight binary or twos complement output coding. The AD7908 / AD7918 / AD7928 each feature eight single-ended analog inputs with a channel sequencer to allow a preprogrammed selection of channels to be converted sequentially.The conversion time for the AD7908 / AD7918 / AD7928 is determined by the SCLK frequency, which is also used as the master clock to control the conversion.PRODUCT HIGHLIGHTSHigh Throughput with Low Power Consumption. The AD7908 / AD7918 / AD7928 offer up to 1 MSPS throughput rates. At the maximum throughput rate with 3 V supplies, the AD7908 / AD7918 / AD7928 dissipate just 6 mW of power maximum.Eight Single-Ended Inputs with a Channel Sequencer. A sequence of channels can be selected, through which the ADC cycles and converts on.Single-Supply Operation with VDRIVEFunction. The AD7908 / AD7918 / AD7928 operate from a single 2.7 V to 5.25 V supply. The VDRIVEfunction allows the serial interface to connect directly to either 3 V or 5 V processor systems independent of AVDD.Flexible Power/Serial Clock Speed Management. The conversion rate is determined by the serial clock, allowing the conversion time to be reduced through the serial clock speed increase. The parts also feature various shutdown modes to maximize power efficiency at lower throughput rates. Current consumption is 0.5 μA max when in full shutdown.No Pipeline Delay. The parts feature a standard successive approximation ADC with accurate control of the sampling instant via aCSinput and once off conversion control.