ADA4941-1 Single-Supply, Differential 18-Bit ADC Driver _ BDTIC a Leading Distributor in China

ADA4941-1 Single-Supply, Differential 18-Bit ADC Driver

The ADA4941-1 is a low power, low noise differential driver for analog-to-digital converters (ADCs) up to 18 bits in systems that are sensitive to power. The ADA4941-1 is configured in an easy-to-use, single-ended-to-differential configuration and requires no external components for a gain of 2 configuration. A resistive feedback network can be added to achieve gains greater than 2. The ADA4941-1 provides essential benefits, such as low distortion and high SNR that are required for driving high resolution ADCs.

With a wide input voltage range (0 V to 3.9 V on a single 5 V supply), rail-to-rail output, high input impedance, and a user-adjustable gain, the ADA4941-1 is designed to drive single-supply ADCs with differential inputs found in a variety of low power applications, including battery-operated devices and singlesupply data acquisition systems.

The ADA4941-1 is ideal for driving the 16-bit and 18-bit PulSAR® ADCs, such as the AD7687, AD7690, and AD7691. The ADA4941-1 is manufactured on Analog Devices, Inc., proprietary, second-generation, eXtra fast complementary bipolar (XFCB) process, which enables the amplifier to achieve 18-bit performance on low supply currents.

The ADA4941-1 is available in a small 8-lead LFCSP as well as a standard 8-lead SOIC and is rated to work over the extended industrial temperature range, −40°C to +125°C.

Applications

Features and Benefits

Single-ended-to-differential converter

Excellent linearity

Distortion −110 dBc at 100 kHz for VO, dm = 2 V p-p

Distortion −110 dBc at 100 kHz for VO, dm = 2 V p-p

Low noise: 10.2 nV/√Hz, output-referred, G = 2

Extremely low power: 2.2 mA (3 V supply)

High input impedance: 24 MΩ

User-adjustable gain

High speed: 31 MHz, −3 dB bandwidth (G = +2)

Fast settling time: 300 ns to 0.005% for a 2 V step

Low offset: 0.8 mV maximum, output-referred, G = 2

Rail-to-rail output

Disable feature

Wide supply voltage range: 2.7 V to 12 V

Available in space-saving, 3 mm × 3 mm LFCSP

Amplifiers

SPICE Models

ADA4941 SPICE Macro Model .CIR

Data Sheets

Document	note
ADA4941-1: Single-Supply, Differential, 18-Bit ADC Driver Data Sheet (Rev. D)	PDF 651.88 K

User Guides

Document	note
UG-474: Evaluation Board for Differential Amplifiers Offered in 8-Lead SOIC Packages	PDF 263 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADA4941-1YCPZ-R2 Production	8 ld LFCSP (3x3mm 1.74x1.45mm EP)	REEL 250	-40 to 125C	3.27	3.27	Y
ADA4941-1YCPZ-R7 Production	8 ld LFCSP (3x3mm 1.74x1.45mm EP)	REEL 1500	-40 to 125C	0	2.42	Y
ADA4941-1YCPZ-RL Production	8 ld LFCSP (3x3mm 1.74x1.45mm EP)	REEL 5000	-40 to 125C	0	2.42	Y
ADA4941-1YRZ Production	8 ld SOIC	OTH 98	-40 to 125C	2.84	2.42	Y
ADA4941-1YRZ-R7 Production	8 ld SOIC	REEL 1000	-40 to 125C	0	2.42	Y
ADA4941-1YRZ-RL Production	8 ld SOIC	REEL 2500	-40 to 125C	0	2.42	Y

Evaluation Boards

Part Number	Description	Price	RoHS
EVAL-FDA-1CPZ-16	Evaluation Bare Board for 16 Lead LFCSP	18.25	Y
EVAL-FDA-1RMZ-8	Evaluation Bare Board for 8 Lead MSOP	18.25	Y
EVAL-FDA-1RZ-8	Evaluation Bare Board for 8 Lead SOIC	18.25	Y
FDA-FILTER-CPZ	Evaluation Board Filter for LFCSP	18.25	Y