Analog Devices OP177GS, OP177GP, OP177FP, OP177FS Datasheet

a		Ultraprecision
		Operational Amplifier
		OP177

FEATURES

Ultralow Offset Voltage:

TA = 25 C: 25 V Max

Outstanding Offset Voltage Drift: 0.1 V/ C Max

Excellent Open-Loop Gain and Gain Linearity:

12 V/ V Typ

CMRR: 130 dB Min

PSRR: 115 dB Min

Low Supply Current: 2.0 mA Max

Fits Industry Standard Precision Op Amp Sockets

(OP07/OP77)

PIN CONNECTIONS

Epoxy Mini-DIP

(P Suffix)

8-Pin SO (S-Suffix)

V	TRIM	1	8	V	TRIM
OS				OS
	–IN	2	7	V+
	+IN	3	6	OUT
	V–	4	5	NC

NC = NO CONNECT

GENERAL DESCRIPTION

The OP177 features the highest precision performance of any op amp currently available. Offset voltage of the OP177 is only 25 V max at room temperature. The ultralow VOS of the OP177 combines with its exceptional offset voltage drift (TCVOS) of 0.1 V/°C max to eliminate the need for external VOS adjustment and increases system accuracy over temperature.

The OP177’s open-loop gain of 12 V/ V is maintained over the full ±10 V output range. CMRR of 130 dB min, PSRR of

120 dB min, and maximum supply current of 2 mA are just a few examples of the excellent performance of this operational amplifier. The OP177’s combination of outstanding specifications ensures accurate performance in high closed-loop gain applications.

This low noise bipolar input op amp is also a cost effective alternative to chopper-stabilized amplifiers. The OP177 provides chopper-type performance without the usual problems of high noise, low frequency chopper spikes, large physical size, limited common-mode input voltage range, and bulky external storage capacitors.

The OP177 is offered in the –40°C to +85°C extended industrial temperature ranges. This product is available in 8-pin epoxy DIPs, as well as the space saving 8-pin SmallOutline (SO).

V+
			R2A*		(OPTIONA	R2B*
					L
							C1				R7
					NULL)
			R1A			R1B
		2B									Q19
								Q9		Q10
			Q7		Q8			Q11	Q12		R9
		Q5	Q3	Q6		Q4					OUTPUT
NONINVERTING	R3					Q27	C3	C2		Q17	R10
										Q16
INPUT			Q1			Q26	R5
		Q21									Q20
			Q23			Q25
	R4	Q22	Q24
INVERTING						Q2				Q15
INPUT
											Q18
									Q14
								Q13		R6	R8
V–
	*NOTE:
	R2A AND R2B ARE ELECTRONICALLY ADJUSTED ON CHIP AT FACTORY.

Figure 1. Simplified Schematic

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Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: [phone]	www.analog.com
Fax: [phone]	© Analog Devices, Inc., 2002

ELECTRICAL CHARACTERISTICS (@ VS = 15 V, TA = 25 C, unless otherwise noted.)									OP177
				OP177F			OP177G
Parameter	Symbol	Conditions	Min	Typ	Max	Min	Typ	Max	Unit
INPUT OFFSET									µV
VOLTAGE	VOS			10	25		20	60
LONG-TERM
INPUT OFFSET	∆VOS/Time								µV/Mo
Voltage Stability				0.3			0.4
INPUT OFFSET1
CURRENT	IOS			0.3	1.5		0.3	2.8	nA
INPUT BIAS
CURRENT	IB		–0.2	1.2	2	–0.2	1.2	2.8	nA
INPUT NOISE		fo = 1 Hz to 100 Hz2
VOLTAGE	en			118	150		118	150	nV rms
INPUT NOISE		fo = 1 Hz to 100 Hz2
CURRENT	in			3	8		3	8	pA rms
INPUT
RESISTANCE
Differential-									MΩ
Mode3	RIN		26	45		18.5	45
INPUT
RESISTANCE									GΩ
COMMON-MODE	RINCM			200			200
INPUT VOLTAGE			±13	± 14		± 13	± 14
RANGE4	IVR								V
COMMON-MODE
REJECTION		VCM = ±13 V
RATIO	CMRR		130	140		115	140		dB
POWER SUPPLY
REJECTION		VS = ±3 V to ± 18 V
RATIO	PSRR			115	125		110	120	dB
LARGE SIGNAL		RL 2 kΩ,
VOLTAGE GAIN	AVO		5000	12000		2000	6000		V/mV
		VO = 610 V5
OUTPUT
VOLTAGE		RL 10 kΩ	±13.5	± 14.0		± 13.5	± 14.0
SWING	VO								V
		RL 2 kΩ	±12.5	± 13.0		± 12.5	± 13.0		V
		RL 1 kΩ	±12.0	± 12.5		± 12.0	± 12.5		V
SLEW RATE2	SR	RL 2 kΩ	0.1	0.3		0.1	0.3		V/µs
CLOSED-LOOP
BANDWIDTH2	BW	AVCL = 1	0.4	0.6		0.4	0.6		MHz
OPEN-LOOP
OUTPUT									Ω
RESISTANCE	RO			60			60

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–2–

							OP177
POWER		VS = ±15 V,
CONSUMPTION	PD
		No Load	50	60	50	60		mW
		Vs = ±3 V,
		No Load	3.5	4.5	3.5	4.5		mW
SUPPLY		VS = ±15 V,
CURRENT	ISY
		No Load	1.6	2	1.6	2		mA
OFFSET
ADJUSTMENT		RP = 20 kΩ	± 3		± 3
RANGE								mV

NOTES

1Long-Term Input Offset Voltage Stability refers to the averaged trend line of VOS versus time over extended periods after the first 30 days of operation. Excluding the initial hour of operation, changes in VOS during the first 30 operating days are typically less than 2.0 V.

2Sample tested.

3Guaranteed by design.

4Guaranteed by CMRR test condition.

5To ensure high open-loop gain throughout the ± 10 V output range, AVO is tested at –10 V ≤ VO ≤ 0 V, 0 V ≤ VO ≤ +10 V, and –10 V ≤ VO ≤ +10 V.

Specifications subject to change without notice.

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–3–

OP177–SPECIFICATIONS

ELECTRICAL CHARACTERISTICS (@ VS = 15 V, –40 C ≤ TA ≤ 85 C, unless otherwise noted.)

				OP177F			OP177G
Parameter	Symbol	Conditions	Min	Typ	Max	Min	Typ	Max	Unit
INPUT OFFSET VOLTAGE	VOS			15	40		20	100	µV
AVERAGE INPUT OFFSET									µV/°C
VOLTAGE DRIFT1	TCVOS			0.1	0.3		0.7	1.2
INPUT OFFSET CURRENT	IOS			0.5	2.2		0.5	4.5	nA
AVERAGE INPUT OFFSET									pA/°C
CURRENT DRIFT2	TCIOS			1.5	40		1.5	85
INPUT BIAS CURRENT	IB		–0.2	2.4	4		2.4	± 6	nA
AVERAGE INPUT BIAS									pA/°C
CURRENT DRIFT2	TCIB			8	40		15	60
INPUT VOLTAGE RANGE3	IVR		± 13	± 13.5		±13	± 13.5		V
COMMON-MODE		VCM = ± 13 V
REJECTION RATIO	CMRR		120	140		110	140		dB
POWER SUPPLY		VS = ±3 V to ±18 V
REJECTION RATIO	PSSR		110	120		106	115		dB
LARGE-SIGNAL		RL 2 kΩ, VO = 10 V
VOLTAGE GAIN4	AVO		2000	6000		1000	4000		V/mV
OUTPUT VOLTAGE SWING	VO	RL 2/kΩ	± 12	± 13		±12	± 13		V
POWER CONSUMPTION	PD	VS = ±15 V, No Load		60	75		60	75	mW
SUPPLY CURRENT	ISY	VS = ±15 V, No Load		20	2.5		2	2.5	mA

NOTES

1OP177TCVOS is sample tested.

2Guaranteed by endpoint limits.

3Guaranteed by CMRR test condition.

4To ensure high open-loop gain throughout the ± 10 V output range, AVO is tested at –10 V ≤ VO ≤ 0 V, 0 V ≤ VO ≤ +10 V, and –10 V ≤ VO ≤ +10 V.

Specifications subject to change without notice.

200k

50

–

OP177 VO

+

VO VOS = 4000

Figure 2. Typical Offset Voltage Test Circuit

20k

		V+
–	–
INPUT	OP177	OUTPUT
+	+
		VOS TRIM RANGE IS
		TYPICALLY 3.0mV
	V–

Figure 3. Optional Offset Nulling Circuit

–4–

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