ADA4638-1 30V Auto-zero, Rail-to-Rail Output Precision Amplifier

The ADA4638-1 is a high voltage, high precision, zero-drift amplifier featuring rail-to-rail output swing. It is guaranteed to operate from 4.5 V to 30 V single supply or ±2.25 V to ±15 V dual supplies while consuming less than 0.95 mA of supply current at ±5 V.

With an offset voltage of 4 μV, offset drift less than 0.05 μV/°C, no 1/f noise, and input voltage noise of only 1.2 μV p-p (0.1 Hz to 10 Hz), the ADA4638-1 is suited for high precision applications where large error sources cannot be tolerated. Pressure sensors, medical equipment, and strain gage amplifiers benefit greatly from nearly zero drift over the wide operating temperature range. Many applications can take advantage of the rail-to-rail output swing provided by the ADA4638-1 to maximize the signal-to-noise ratio (SNR).

The ADA4638-1 is specified for the extended industrial (−40°C to +125°C) temperature range and is available in 8-lead LFCSP (3 mm × 3 mm) and SOIC packages.

Applications

Electronic weigh scale
Pressure and position sensors
Strain gage amplifiers
Medical instrumentation
Thermocouple amplifiers

Features and Benefits

Single Supply Operation: 4.5 V to 30V

Dual supply operation: ±2.25 V to ±15 V

Low offset voltage: 4 μV maximum

Input offset voltage drift: 0.05 μV/°C maximum

High gain: 130 dB minimum

High PSRR: 120 dB minimum

High CMRR: 130 dB minimum

Input common-mode range includes lower supply rail

Rail-to-rail output

Low supply current: 0.95 mA maximum

Amplifiers

Zero-Drift Amplifiers

Aerospace and Defense

Solutions

Instrumentation and Measurement

Electronic Test & Measurement

SPICE Models

ADA4638-1 SPICE Macro Model .CIR

Reference Designs

CN0359 Design & Integration Files .ZIP

Data Sheets

Document	note
ADA4638-1: 30V Auto-zero, Rail-to-Rail Output Precision Amplifier Data Sheet (Rev. 0)	PDF 176 kB

Technical Books

Document	note

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADA4638-1ACPZ-R7 Production	8 ld LFCSP (3x3mm, 1.6x2.34mm exposed pad	REEL 1500	-40 to 125C	0	1.28	Y
ADA4638-1ACPZ-RL Production	8 ld LFCSP (3x3mm, 1.6x2.34mm exposed pad	REEL 5000	-40 to 125C	0	1.28	Y
ADA4638-1ARZ Production	8 ld SOIC	OTH 98	-40 to 125C	1.56	1.28	Y
ADA4638-1ARZ-R7 Production	8 ld SOIC	REEL 1000	-40 to 125C	0	1.28	Y
ADA4638-1ARZ-RL Production	8 ld SOIC	REEL 2500	-40 to 125C	0	1.28	Y

Evaluation Boards

Part Number	Description	Price	RoHS
EVAL-PRAOPAMP-1KSZ	Single KS-5 lead SC70 Evaluation Board	20.19	Y
EVAL-PRAOPAMP-1RJZ	Single RJ-5 lead SOT23 Evaluation Board	20.19	Y
EVAL-PRAOPAMP-1RMZ	Single RM-8 lead MSOP Evaluation Board	20.19	Y
EVAL-PRAOPAMP-1RZ	Single R-8 lead SOIC Evaluation Board	20.19	Y