Features: `Throughput:
1 MSPS (Warp mode)
800 kSPS (Normal mode)
666 kSPS (Impulse mode)
`16-bit resolution
`Analog input voltage range: 0 V to 2.5 V
`No pipeline delay
`Parallel and serial 5 V/3 V interface
`SPI®/QSPITM/MICROWIRETM/DSP compatible
`Single 5 V supply operation
`Power dissipation
92 mW typ @ 666 kSPS, 138 W @ 1 kSPS without REF
128 mW typ @ 1 MSPS with REF
`48-lead LQFP and 48-lead LFCSP packages
`Pin-to-pin compatible with PulSAR ADCsApplication·Data acquisition
·Instrumentation
·Digital signal processing
·Spectrum analysis
·Medical instruments
·Battery-powered systems
·Process controlPinout
SpecificationsIN2, TEMP2, REF, REFBUFIN, AVDD + 0.3 V to
INGND, REFGND to AGND AGND 0.3 V
Ground Voltage Differences
AGND, DGND, OGND ±0.3 V
Supply Voltages
AVDD, DVDD, OVDD 0.3 V to +7 V
AVDD to DVDD, AVDD to OVDD ±7 V
DVDD to OVDD 0.3 V to +7 V
Digital Inputs 0.3 V to DVDD + 0.3 V
PDREF, PDBUF3 ±20 mA
Internal Power Dissipation4 700 mW
Internal Power Dissipation5 2.5 W
Junction Temperature 150°C
Storage Temperature Range 65°C to +150°C
Lead Temperature Range 300°C
1 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.
2 See Analog Input section.
3 See Voltage Reference Input section.
4 Specification is for the device in free air:
48-Lead LQFP; JA = 91°C/W, JC = 30°C/W
5 Specification is for the device in free air:
48-Lead LFCSP; JA = 26°C/W.
DescriptionThe AD7653* is a 16-bit, 1 MSPS, charge redistribution SAR analog-to-digital converter that operates from a single 5 V power supply. The part contains a high speed 16-bit sampling ADC, internal conversion clock, internal reference, error correction circuits, and both serial and parallel system interface ports. It features a very high sampling rate mode (Warp), a fast mode (Normal) for asynchronous conversion rate applications, and a reduced power mode (Impulse) for low power applica-tions where power is scaled with the throughput. The AD7653 is fabricated using Analog Devices' high performance, 0.6 micron CMOS process, with correspondingly low cost. It is available in a 48-lead LQFP and a tiny 48-lead LFCSP with operation specified from 40°C to +85°C.
AD7653 Data Sheet
