Specification	AD7643BSTZRL

Architecture	SAR
Configuration	S/H-ADC
Data Interface	SPI, DSP, Parallel
Input Type	Differential
Mounting Type	Surface Mount
Number of A/D Converters	1 count
Number of Bits	18 bits
Number of Inputs	1
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Package / Case	48-LQFP
Package Length	7 mm
Package Name	48-LQFP
Package Width	7 mm
Ratio - ADC	1
Ratio - S/H	1
Reference Type	External, Internal
Sampling Rate (Per Second)	1.25 MHz
Voltage - Supply, Analog (Max)	2.63 V
Voltage - Supply, Analog (Min)	2.37 V
Voltage - Supply, Digital (Max)	2.63 V
Voltage - Supply, Digital (Min)	2.37 V

AD7643 Series

Part	Package / Case	Number of A/D Converters	Mounting Type	Number of Bits	Input Type	Architecture	Reference Type	Voltage - Supply, Analog (Min)	Voltage - Supply, Analog (Max)	Package Width	Package Name	Package Length	Data Interface	Operating Temperature (Min)	Operating Temperature (Max)	Number of Inputs	Voltage - Supply, Digital (Min)	Voltage - Supply, Digital (Max)	Configuration	Ratio - ADC	Ratio - S/H	Sampling Rate (Per Second)	Supplied Contents	Contents	Input Range	Utilized IC / Part	Power (Typ)
Analog Devices Inc./Maxim Integrated AD7643BCPZ	48-VFQFN Exposed Pad CSP	1 count	Surface Mount	18 bits	Differential	SAR	External Internal	2.37 V	2.63 V	7 mm	48-LFCSP-VQ	7 mm	DSP Parallel SPI	-40 °C	85 °C	1	2.37 V	2.63 V	S/H-ADC	1	1	1.25 MHz
Analog Devices Inc./Maxim Integrated AD7643BSTZ	48-LQFP	1 count	Surface Mount	18 bits	Differential	SAR	External Internal	2.37 V	2.63 V	7 mm	48-LQFP	7 mm	DSP Parallel SPI	-40 °C	85 °C	1	2.37 V	2.63 V	S/H-ADC	1	1	1.25 MHz
Analog Devices Inc./Maxim Integrated AD7643BCPZRL	48-VFQFN Exposed Pad CSP	1 count	Surface Mount	18 bits	Differential	SAR	External Internal	2.37 V	2.63 V	7 mm	48-LFCSP-VQ	7 mm	DSP Parallel SPI	-40 °C	85 °C	1	2.37 V	2.63 V	S/H-ADC	1	1	1.25 MHz
Analog Devices Inc./Maxim Integrated EVAL-AD7643EDZ		1 count		18 bits									Parallel Serial									1.25 MHz	Board(s)	Board	±VREF	AD7643	65 mW
Analog Devices Inc./Maxim Integrated AD7643BSTZRL	48-LQFP	1 count	Surface Mount	18 bits	Differential	SAR	External Internal	2.37 V	2.63 V	7 mm	48-LQFP	7 mm	DSP Parallel SPI	-40 °C	85 °C	1	2.37 V	2.63 V	S/H-ADC	1	1	1.25 MHz

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$	Updated

Digikey	Tape & Reel (TR)	2000	$ 38.70	<1d

CAD

3D models and CAD resources for this part

Description

General part information

AD7643 Series

The AD7643 is an 18-bit, 1.25 MSPS, charge redistribution SAR, fully differential, analog-to-digital converter (ADC) 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 (and buffer), error correction circuits, and both serial and parallel system interface ports. The part has no latency and can be used in asynchronous rate applications. The AD7643 is hardware factory calibrated and tested to ensure ac parameters, such as signal-to-noise ratio (SNR), in addition to the more traditional dc parameters of gain, offset, and linearity. The AD7643 is available in Pb-free only packages with operation specified from −40°C to +85°C.PRODUCT HIGHLIGHTSFast Throughput. The AD7643 is a 1.25MSPS, charge redistribution, 18-bit SAR ADC.Superior Linearity. The AD7643 has no missing 18-bit code.Internal Reference. The AD7643 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 AD7643 operates from a 2.5 V single supply.Serial or Parallel Interface. Versatile parallel (18-, 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 speed data acquisition/high dynamic data acquisitionDigital signal processingSpectrum analysisInstrumentationCommunicationsATE

Documents

Technical documentation and resources

AD7643: 18-Bit, 1.25 MSPS PulSAR™ ADC Data Sheet (Rev.A)

Data Sheet

Package Drawing - 48-Lead LQFP (7mm x 7mm)

Package Drawing