Specification	AD7944BCPZ

Architecture	SAR
Configuration	S/H-ADC
Data Interface	DSP, SPI
Input Type	Pseudo-Differential
Mounting Type	Surface Mount
Number of A/D Converters	1
Number of Bits	14
Number of Inputs	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Package / Case	20-WFQFN Exposed Pad, CSP
Ratio - S/H:ADC	1:1
Reference Type	External, Internal
Sampling Rate (Per Second)	2.5 M
Supplier Device Package	20-LFCSP (4x4)
Voltage - Supply, Analog [Max]	2.625 V
Voltage - Supply, Analog [Min]	2.375 V
Voltage - Supply, Digital [Max]	2.625 V
Voltage - Supply, Digital [Min]	2.375 V

AD7944 Series

14-Bit, 2.5 MSPS, PulSAR 15.5 mW ADC in LFCSP

Part	Number of Bits	Number of Inputs	Ratio - S/H:ADC	Voltage - Supply, Digital [Min]	Voltage - Supply, Digital [Max]	Mounting Type	Reference Type	Voltage - Supply, Analog [Max]	Voltage - Supply, Analog [Min]	Package / Case	Supplier Device Package	Architecture	Sampling Rate (Per Second)	Number of A/D Converters	Input Type	Configuration	Data Interface	Operating Temperature [Max]	Operating Temperature [Min]
Analog Devices AD7944BCPZ	14	1	1:1	2.375 V	2.625 V	Surface Mount	External Internal	2.625 V	2.375 V	20-WFQFN Exposed Pad CSP	20-LFCSP (4x4)	SAR	2.5 M	1	Pseudo-Differential	S/H-ADC	DSP SPI	85 °C	-40 °C

Pricing

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

Distributor	Package	Quantity	$

Digikey	Tray	1	$ 27.97
		10	$ 20.78
		25	$ 18.94
		80	$ 17.17
		230	$ 15.97
		440	$ 15.94

Description

General part information

AD7944 Series

The AD7944 is a 14-bit, 2.5 MSPS successive approximation analog-to-digital converter (SAR ADC). It contains a low power, high speed, 14-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and a versatile serial interface port. On the rising edge of CNV, the AD7944 samples an analog input, IN+, between 0 V and VREFwith respect to a ground sense, IN−. The AD7944 features a very high sampling rate turbo mode (TURBO high) and a reduced power normal mode (TURBO low) for low power applications where the power is scaled with the throughput.In normal mode (TURBO low), the SPI-compatible serial interface also features the ability, using the SDI input, to daisy-chain several ADCs on a single 3-wire bus and provide an optional busy indicator. The serial interface is compatible with 1.8 V, 2.5 V, and 2.7 V supplies using the separate VIO supply.The AD7944 is available in a 20-lead LFCSP with operation specified from −40°C to +85°C.APPLICATIONSBattery-powered equipmentCommunicationsATEData acquisition systemsMedical instruments