AD4681 Series

Differential Inputs, 500 kSPS, Dual Simultaneous Sampling SAR ADCs

Catalog

Differential Inputs, 500 kSPS, Dual Simultaneous Sampling SAR ADCs

Part	Input Type	Features	Voltage - Supply, Analog [Max]	Voltage - Supply, Analog [Min]	Mounting Type	Number of A/D Converters	Package / Case	Architecture	Voltage - Supply, Digital [Min]	Voltage - Supply, Digital [Max]	Number of Inputs	Ratio - S/H:ADC	Configuration	Supplier Device Package	Sampling Rate (Per Second)	Data Interface	Number of Bits	Operating Temperature [Max]	Operating Temperature [Min]	Reference Type
Analog Devices AD4681BCPZ-RL7	Differential	Simultaneous Sampling	3.6 V	3 V	Surface Mount	2	16-WFQFN Exposed Pad CSP	SAR	1.65 V	3.6 V	2	0:2	ADC	16-LFCSP (3x3)	500k	Serial	16	125 °C	-40 °C	External Internal
Analog Devices AD4681BCPZ-RL	Differential	Simultaneous Sampling	3.6 V	3 V	Surface Mount	2	16-WFQFN Exposed Pad CSP	SAR	1.65 V	3.6 V	2	0:2	ADC	16-LFCSP (3x3)	500k	Serial	16	125 °C	-40 °C	External Internal

Catalog

Differential Inputs, 500 kSPS, Dual Simultaneous Sampling SAR ADCs

Key Features

• 16-bit ADC family

• Dual simultaneous sampling

• Fully differential analog inputs

• Throughput conversion rate

• 1 MSPS for AD4680

• 500 kSPS for AD4681

• SNR (typical)

• 92.5 dB, VREF= 3.3 V external

• 100 dB with 8× OSR, RES = 1

• On-chip oversampling function

• Resolution boost function

• INL (maximum) 1.5 LSBs

• 2.5 V internal reference at 10 ppm/°C

• High speed serial interface

• −40°C to +125°C operation

• 3 mm × 3 mm, 16-lead LFCSP

• Wide common-mode range

• Alert function

Description

TheAD4680/AD4681 are 16-bit, pin-compatible, dual simultaneous sampling, high speed, low power, successive approximation register (SAR) analog-to-digital converters (ADCs) that operate from a 3.0 V to 3.6 V power supply and feature throughput rates of 1 MSPS for the AD4680 and 500 kSPS for the AD4681. The analog input type is differential, accepts a wide common-mode input voltage, and is sampled and converted on the falling edge of CS. Integrated on-chip oversampling blocks improve dynamic range and reduce noise at lower bandwidths. A buffered internal 2.5 V reference is included. Alternatively, an external reference up to 3.3 V can be used.The conversion process and data acquisition use standard control inputs, allowing easy interfacing to microprocessors or digital signal processors (DSPs). The device is compatible with 1.8 V, 2.5 V, and 3.3 V interfaces using a separate logic supply. The AD4680/AD4681 are available in a 16-lead lead frame chip scale package (LFCSP) with operation specified from −40°C to +125°C.APPLICATIONSMotor control position feedbackMotor control current senseSonarPower qualityData acquisition systemsErbium doped fiber amplifier (EDFA) applicationsInphase (I) and quadrature (Q) demodulation