Analog Devices AD8544ARU, AD8544AR, AD8542ARU, AD8542ARM, AD8542AR Datasheet

a		General-Purpose CMOS
		Rail-to-Rail Amplifiers
		AD8541/AD8542/AD8544

FEATURES

Single Supply Operation: 2.7 V to 5.5 V

Low Supply Current: 45 A/Amplifier

Wide Bandwidth: 1 MHz

No Phase Reversal

Low Input Currents: 4 pA

Unity Gain Stable

Rail-to-Rail Input and Output

APPLICATIONS

ASIC Input or Output Amplifier

Sensor Interface

Piezo Electric Transducer Amplifier

Medical Instrumentation

Mobile Communication

Audio Output

Portable Systems

GENERAL DESCRIPTION

The AD8541/AD8542/AD8544 are single, dual and quad rail- to-rail input and output single supply amplifiers featuring very low supply current and 1 MHz bandwidth. All are guaranteed to operate from a 2.7 V single supply as well as a 5 V supply. These parts provide 1 MHz bandwidth at low current consumption of 45 A per amplifier.

Very low input bias currents enable the AD8541/AD8542/AD8544 to be used for integrators, photodiode amplifiers, piezo electric sensors and other applications with high source impedance. Supply current is only 45 A per amplifier, ideal for battery operation.

PIN CONFIGURATIONS

5-Lead SC70 and SOT-23

(KS and RT Suffixes)

OUT A	1	AD8541 5	V+
V 2
+IN A	3	4	IN A

8-Lead SOIC

(R Suffix)

NC	1	AD8541	8	NC
–IN A	2		7	V+
+IN A	3		6	OUT A
V–	4		5	NC

NC = NO CONNECT

8-Lead SOIC, MSOP, and TSSOP

(R, RM, and RU Suffixes)

OUT A	1	AD8542	8	V+
–IN A	2		7	OUT B
+IN A	3		6	–IN B
V–	4		5	+IN B

Rail-to-rail inputs and outputs are useful to designers buffering ASICs in single supply systems. The AD8541/AD8542/AD8544 are optimized to maintain high gains at lower supply voltages, making them useful for active filters and gain stages.

The AD8541/AD8542/AD8544 are specified over the extended industrial (–40°C to +125°C) temperature range. The AD8541 is available in 8-lead SOIC, 5-lead SC70, and 5-lead SOT-23 packages. The AD8542 is available in 8-lead SOIC, 8-lead MSOP, and 8-lead TSSOP surface-mount packages. The AD8544 is available in 14-lead narrow SOIC, and 14-lead TSSOP surface mount packages. All TSSOP, MSOP, SC70, and SOT versions are available in tape and reel only.

14-Lead SOIC and TSSOP

(R and RU Suffixes)

OUT A	1		14	OUT D
–IN A	2		13	–IN D
+IN A	3		12	+IN D
V+	4	AD8544	11	V–
+IN B	5		10	+IN C
–IN B	6		9	–IN C
OUT B	7		8	OUT C

REV. B

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Fax: [phone]	© Analog Devices, Inc., 2000

AD8541/AD8542/AD8544–SPECIFICATIONS

ELECTRICAL CHARACTERISTICS (VS = 2.7 V, VCM = 1.35 V, TA = 25 C unless otherwise noted)

Parameter	Symbol	Conditions		Min	Typ	Max	Unit
INPUT CHARACTERISTICS
Offset Voltage	VOS	–40°C ≤ TA ≤ +125°C			1	6	mV
						7	mV
Input Bias Current	IB	–40°C ≤ TA	≤ +85°C		4	60	pA
						100	pA
		–40°C ≤ TA	≤ +125°C			1,000	pA
Input Offset Current	IOS	–40°C ≤ TA	≤ +85°C		0.1	30	pA
						50	pA
		–40°C ≤ TA	≤ +125°C			500	pA
Input Voltage Range				0		2.7	V
Common-Mode Rejection Ratio	CMRR	VCM = 0 V to 2.7 V		40	45		dB
		–40°C ≤ TA	≤ +125°C	38			dB
Large Signal Voltage Gain	AVO	RL = 100 kΩ , VO = 0.5 V to 2.2 V		100	500		V/mV
		–40°C ≤ TA	≤ +85°C	50			V/mV
		–40°C ≤ TA	≤ +125°C	2			V/mV
Offset Voltage Drift	∆VOS/∆T	–40°C ≤ TA	≤ +125°C		4		µV/°C
Bias Current Drift	∆IB/∆T	–40°C ≤ TA	≤ +85°C		100		fA/°C
		–40°C ≤ TA	≤ +125°C		2,000		fA/°C
Offset Current Drift	∆IOS/∆T	–40°C ≤ TA	≤ +125°C		25		fA/°C
OUTPUT CHARACTERISTICS
Output Voltage High	VOH	IL = 1 mA		2.575	2.65		V
Output Voltage Low	VOL	–40°C ≤ TA ≤ +125°C		2.550			V
		IL = 1 mA			35	100	mV
Output Current	IOUT	–40°C ≤ TA ≤ +125°C				125	mV
		VOUT = VS – 1 V			15		mA
	± ISC				± 20		mA
Closed Loop Output Impedance	ZOUT	f = 200 kHz, AV = 1			50		Ω
POWER SUPPLY
Power Supply Rejection Ratio	PSRR	VS = 2.5 V to 6 V		65	76		dB
		–40°C ≤ TA ≤ +125°C		60			dB
Supply Current/Amplifier	ISY	VO = 0 V			38	55	µA
		–40°C ≤ TA ≤ +125°C				75	µA
DYNAMIC PERFORMANCE		RL = 100 kΩ					V/µs
Slew Rate	SR			0.4	0.75
Settling Time	tS	To 0.1% (1 V Step)			5		µs
Gain Bandwidth Product	GBP				980		kHz
Phase Margin	Φo				63		Degrees
NOISE PERFORMANCE							nV/√Hz
Voltage Noise Density	en	f = 1 kHz			40
	en	f = 10 kHz			38		nV/√Hz
Current Noise Density	in				<0.1		pA/√Hz

Specifications subject to change without notice.

–2–

REV. B

AD8541/AD8542/AD8544

ELECTRICAL CHARACTERISTICS (VS = 3.0 V, VCM = 1.5 V, TA = 25 C unless otherwise noted)

Parameter	Symbol	Conditions		Min	Typ	Max	Unit
INPUT CHARACTERISTICS
Offset Voltage	VOS	–40°C ≤ TA ≤ +125°C			1	6	mV
Input Bias Current	IB					7	mV
		–40°C ≤ TA	≤ +85°C		4	60	pA
						100	pA
Input Offset Current	IOS	–40°C ≤ TA	≤ +125°C			1,000	pA
		–40°C ≤ TA	≤ +85°C		0.1	30	pA
						50	pA
		–40°C ≤ TA	≤ +125°C			500	pA
Input Voltage Range				0		3	V
Common-Mode Rejection Ratio	CMRR	VCM = 0 V to 3 V		40	45		dB
		–40°C ≤ TA	≤ +125°C	38			dB
Large Signal Voltage Gain	AVO	RL = 100 kΩ , VO = 0.5 V to 2.2 V		100	500		V/mV
		–40°C ≤ TA	≤ +85°C	50			V/mV
	∆VOS/∆T	–40°C ≤ TA	≤ +125°C	2			V/mV
Offset Voltage Drift		–40°C ≤ TA	≤ +125°C		4		µV/°C
Bias Current Drift	∆IB/∆T	–40°C ≤ TA	≤ +85°C		100		fA/°C
		–40°C ≤ TA	≤ +125°C		2,000		fA/°C
Offset Current Drift	∆IOS/∆T	–40°C ≤ TA	≤ +125°C		25		fA/°C
OUTPUT CHARACTERISTICS
Output Voltage High	VOH	IL = 1 mA		2.875	2.955		V
		–40°C ≤ TA ≤ +125°C		2.850			V
Output Voltage Low	VOL	IL = 1 mA			32	100	mV
Output Current	IOUT	–40°C ≤ TA ≤ +125°C				125	mV
		VOUT = VS – 1 V			18		mA
	± ISC				± 25		mA
Closed Loop Output Impedance	ZOUT	f = 200 kHz, AV = 1			50		Ω
POWER SUPPLY
Power Supply Rejection Ratio	PSRR	VS = 2.5 V to 6 V		65	76		dB
		–40°C ≤ TA ≤ +125°C		60			dB
Supply Current/Amplifier	ISY	VO = 0 V			40	60	µA
		–40°C ≤ TA ≤ +125°C				75	µA
DYNAMIC PERFORMANCE		RL = 100 kΩ					V/µs
Slew Rate	SR			0.4	0.8
Settling Time	tS	To 0.01% (1 V Step)			5		µs
Gain Bandwidth Product	GBP				980		kHz
Phase Margin	Φo				64		Degrees
NOISE PERFORMANCE							nV/√Hz
Voltage Noise Density	en	f = 1 kHz			42
	en	f = 10 kHz			38		nV/√Hz
Current Noise Density	in				<0.1		pA/√Hz

Specifications subject to change without notice.

REV. B

–3–

AD8541/AD8542/AD8544–SPECIFICATIONS

ELECTRICAL CHARACTERISTICS (VS = 5.0 V, VCM = 2.5 V, TA = 25 C unless otherwise noted)

Parameter	Symbol	Conditions		Min	Typ	Max	Unit
INPUT CHARACTERISTICS
Offset Voltage	VOS	–40°C ≤ TA ≤ +125°C			1	6	mV
Input Bias Current	IB					7	mV
		–40°C ≤ TA	≤ +85°C		4	60	pA
						100	pA
Input Offset Current	IOS	–40°C ≤ TA	≤ +125°C			1,000	pA
		–40°C ≤ TA	≤ +85°C		0.1	30	pA
						50	pA
		–40°C ≤ TA	≤ +125°C			500	pA
Input Voltage Range				0		5	V
Common-Mode Rejection Ratio	CMRR	VCM = 0 V to 5 V		40	48		dB
		–40°C ≤ TA	≤ +125°C	38			dB
Large Signal Voltage Gain	AVO	RL = 100 kΩ , VO = 0.5 V to 2.2 V		20	40		V/mV
		–40°C ≤ TA	≤ +85°C	10			V/mV
	∆VOS/∆T	–40°C ≤ TA	≤ +125°C	2			V/mV
Offset Voltage Drift		–40°C ≤ TA	≤ +125°C		4		µV/°C
Bias Current Drift	∆IB/∆T	–40°C ≤ TA	≤ +85°C		100		fA/°C
		–40°C ≤ TA	≤ +125°C		2,000		fA/°C
Offset Current Drift	∆IOS/∆T	–40°C ≤ TA	≤ +125°C		25		fA/°C
OUTPUT CHARACTERISTICS
Output Voltage High	VOH	IL = 1 mA		4.9	4.965		V
Output Voltage Low	VOL	–40°C ≤ TA ≤ +125°C		4.875			V
		IL = 1 mA			25	100	mV
		–40°C ≤ TA ≤ +125°C				125	mV
Output Current	IOUT	VOUT = VS – 1 V			30		mA
	± ISC				± 60		mA
Closed Loop Output Impedance	ZOUT	f = 200 kHz, AV = 1			45		Ω
POWER SUPPLY
Power Supply Rejection Ratio	PSRR	VS = 2.5 V to 6 V		65	76		dB
		–40°C ≤ TA ≤ +125°C		60			dB
Supply Current/Amplifier	ISY	VO = 0 V			45	65	µA
		–40°C ≤ TA ≤ +125°C				85	µA
DYNAMIC PERFORMANCE		RL = 100 kΩ, CL = 200 pF					V/µs
Slew Rate	SR			0.45	0.92
Full-Power Bandwidth	BWP	1% Distortion			70		kHz
Settling Time	tS	To 0.1% (1 V Step)			6		µs
Gain Bandwidth Product	GBP				1,000		kHz
Phase Margin	Φo				67		Degrees
NOISE PERFORMANCE							nV/√Hz
Voltage Noise Density	en	f = 1 kHz			42
	en	f = 10 kHz			38		nV/√Hz
Current Noise Density	in				<0.1		pA/√Hz

Specifications subject to change without notice.

–4–

REV. B