Build with GS8721 — Datasheet Specs & AI Design Help

00 — Overview

What the GS8721 does

The GS8721/8722/8724 are CMOS rail-to-rail operational amplifiers spanning single, dual, and quad channel variants. These devices operate on a single supply from 2.1V to 5.5V across an industrial temperature range of -40°C to +125°C. Key specifications include an 11MHz gain-bandwidth product, 9V/μs slew rate, and 1.1mA quiescent current per amplifier. The GS8721 single, GS8722 dual, and GS8724 quad versions are available in various small surface-mount packages. Engineers typically use these amplifiers in sensors, audio circuits, active filters, and battery-powered instrumentation requiring low noise and wide input/output swings.

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Start building with GS8721 → Every number above is cited straight from the datasheet — ask what they mean for your design, and the assistant answers from the same source documents.

01 — Key specifications

Datasheet parameters

Datasheet parameters for GS8721
Parameter	Min	Typ	Max	Conditions	Source
quiescent current	1.1 mA	1.1 mA	—	IOUT = 0; (iq); POWER SUPPLY	Gainsil datasheet, p. 3 — Electrical Characteristics
output voltage	100 mV	100 mV	—	RL = 600Ω; OUTPUT CHARACTERISTICS	Gainsil datasheet, p. 3 — Electrical Characteristics
output current	70 mA	70 mA	—	(iout); OUTPUT CHARACTERISTICS	Gainsil datasheet, p. 3 — Electrical Characteristics
supply voltage range	2.1 V	—	5.5 V		Gainsil datasheet, p. 1
input offset voltage drift	2.4 µV/°C	2.4 µV/°C	—	(δvos/δt); INPUT CHARACTERISTICS	Gainsil datasheet, p. 3 — Electrical Characteristics
input offset voltage	800 µV	800 µV	—	(vos); INPUT CHARACTERISTICS	Gainsil datasheet, p. 3 — Electrical Characteristics
gain bandwidth	11 MHz	11 MHz	—	RL = 10kΩ, CL = 100pF; (gbp); DYNAMIC PERFORMANCE	Gainsil datasheet, p. 4 — Electrical Characteristics
cmrr	82 dB	82 dB	—	VS = 5.5V, VCM = -0.1V to 4V; common(cmrr); INPUT CHARACTERISTICS	Gainsil datasheet, p. 3 — Electrical Characteristics
operating temperature (abs max)	-40 °C	—	125 °C		Gainsil datasheet, p. 2 — Absolute Maximum Ratings
input offset current	1 pA	1 pA	—	(ios); INPUT CHARACTERISTICS	Gainsil datasheet, p. 3 — Electrical Characteristics
input bias current	1 pA	1 pA	—	(ib); INPUT CHARACTERISTICS	Gainsil datasheet, p. 3 — Electrical Characteristics
slew rate	9 V/µs	9 V/µs	—	G = +1, 2V Step, RL = 10kΩ; (sr); DYNAMIC PERFORMANCE	Gainsil datasheet, p. 4 — Electrical Characteristics
psrr	91 dB	91 dB	—	VCM = (-VS) + 0.5V; (iq); POWER SUPPLY	Gainsil datasheet, p. 3 — Electrical Characteristics
input voltage noise density	—	11.5 nV/√Hz	—	f = 1kHz	Gainsil datasheet, p. 4 — Electrical Characteristics
response time	—	300 ns	—	Settling Time to 0.1%, G = +1, 2V Step, RL = 600Ω	Gainsil datasheet, p. 4 — Electrical Characteristics
settling time	300 ns	300 ns	—	G = +1, 2V Step, RL = 600Ω; (ts); DYNAMIC PERFORMANCE	Gainsil datasheet, p. 4 — Electrical Characteristics
channel count	—	1	—		Gainsil datasheet, p. 2 — Package/Ordering Information

02 — Alternatives

Closest matches to GS8721

MCP6021 2.3× lower output current, 1.9× lower operating temperature, 1.3× lower input voltage noise density

TSV911AILT 8.0× lower input offset voltage, 2.2× lower output current, 2.1× higher input offset voltage drift

OPA134 5.0× higher input bias current, 4.1× higher quiescent current, 3.9× higher supply voltage range

TL071H 5.3× higher supply voltage range, 3.2× higher input voltage noise density, 2.7× lower output current

HT8721 10.0× lower input offset voltage, 2.2× lower quiescent current, 1.4× higher input voltage noise density

NE5532 2.6× higher supply voltage range, 1.8× lower output current, 1.8× lower slew rate

TLV9001 18.3× lower quiescent current, 11.0× lower gain bandwidth, 8.3× higher settling time

MC33178 9.5× higher supply voltage range, 5.3× lower input offset voltage, 2.2× lower gain bandwidth

03 — FAQ

Frequently asked questions

What is the channel count of the GS8721?

The channel count is 1.

What is the CMRR of the GS8721 when VS = 5.5V and VCM = -0.1V to 4V?

The CMRR is 82 dB.

What is the gain bandwidth product (GBP) of the GS8721 when RL = 10kΩ and CL = 100pF?

The gain bandwidth product is 11 MHz.

What is the input bias current (ib) for the GS8721?

The input bias current (ib) is 1 pA.

What is the input offset current (ios) under INPUT CHARACTERISTICS?

The input offset current (ios) is 1 pA.

What is the input offset voltage (vos) under INPUT CHARACTERISTICS?

The input offset voltage (vos) is 800 µV.

What is the input offset voltage drift (δvos/δt) for the GS8721?

The input offset voltage drift (δvos/δt) is 2.4 µV/°C.

What is the input voltage noise density of the GS8721 at f = 1kHz?

The input voltage noise density is 11.5 nV/√Hz at f = 1kHz.

What is the maximum operating temperature for the GS8721?

The maximum operating temperature is 125 °C.

What is the output current (iout) under OUTPUT CHARACTERISTICS?

The output current (iout) is 70 mA.

What is the output voltage when RL = 600Ω?

The output voltage is 100 mV under the condition RL = 600Ω.

What is the PSRR when VCM = (-VS) + 0.5V and the condition is (iq) POWER SUPPLY?

The PSRR is 91 dB.