AD7641 Series

18-Bit, 2 MSPS SAR ADC

Manufacturer: Analog Devices Inc./Maxim Integrated

Catalog

18-Bit, 2 MSPS SAR ADC

Part	Package Width	Package Name	Package Length	Input Type	Package / Case	Operating Temperature (Min)	Operating Temperature (Max)	Voltage - Supply, Analog (Min)	Voltage - Supply, Analog (Max)	Number of Bits	Architecture	Number of A/D Converters	Ratio - ADC	Ratio - S/H	Configuration	Reference Type	Sampling Rate (Per Second)	Voltage - Supply, Digital (Min)	Voltage - Supply, Digital (Max)	Mounting Type	Data Interface	Number of Inputs
Analog Devices Inc./Maxim Integrated AD7641BCPZ	7 mm	48-LFCSP-VQ	7 mm	Differential	48-VFQFN Exposed Pad CSP	-40 °C	85 °C	2.37 V	2.63 V	18 bits	SAR	1 count	1	1	S/H-ADC	External Internal	2 MHz	2.37 V	2.63 V	Surface Mount	DSP Parallel SPI	1
Analog Devices Inc./Maxim Integrated AD7641BSTZ	7 mm	48-LQFP	7 mm	Differential	48-LQFP	-40 °C	85 °C	2.37 V	2.63 V	18 bits	SAR	1 count	1	1	S/H-ADC	External Internal	2 MHz	2.37 V	2.63 V	Surface Mount	DSP Parallel SPI	1
Analog Devices Inc./Maxim Integrated AD7641BSTZRL	7 mm	48-LQFP	7 mm	Differential	48-LQFP	-40 °C	85 °C	2.37 V	2.63 V	18 bits	SAR	1 count	1	1	S/H-ADC	External Internal	2 MHz	2.37 V	2.63 V	Surface Mount	DSP Parallel SPI	1

Catalog

18-Bit, 2 MSPS SAR ADC

Description

The AD7641 is a 18-bit, 2 MSPS, charge redistribution SAR, fully differential analog-to-digital converter that operates from a single 2.5 V power supply. The part contains a high-speed 18-bit sampling ADC, an internal conversion clock, an internal reference buffer, error correction circuits, and both serial and parallel system interface ports. It features a very high sampling rate mode (Warp) and a fast mode (Normal) for asynchronous conversion rate applications.The AD7641 is hardware factory calibrated and comprehensively tested to ensure ac parameters such as signal-to-noise ratio (SNR) and total harmonic distortion (THD) in addition to the more traditional dc parameters of gain, offset and linearity.Operation is specified from −40°C to +85°C.PRODUCT HIGHLIGHTSFast Throughput.The AD7641 is a 2 MSPS, charge redistribution, 18-bit SAR ADC.Superior Linearity.The AD7641 has no missing 18-bit code.Internal Reference.The AD7641 has a 2.048 V internal reference with a typical drift of ±10 ppm/°C and an on-chip TEMP sensor.Single-Supply Operation.The AD7641 operates from a 2.5 V single supply.Serial or Parallel Interface.Versatile parallel (16- or 8-bit bus) or 2-wire serial interface arrangement compatible with 2.5 V, 3.3 V, or 5 V logic.APPLICATIONSMedical instrumentsHigh dynamic data acquisitionInstrumentationSpectrum analysisATE