Specification	LM1971MX

Applications	Communication Systems
Function	Volume Control
Interface	SPI
Mounting Type	Surface Mount
Number of Channels	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Package / Case	8-SOIC
Package / Case [x]	0.154 in
Package / Case [y]	3.9 mm
Specifications	115 dB
Supplier Device Package	8-SOIC
Voltage - Supply [Max]	12 V
Voltage - Supply [Min]	4.5 V

LM1971 Series

Part	Function	Number of Channels	Applications	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Package / Case [y]	Package / Case [x]	Mounting Type	Specifications	Interface	Supplier Device Package	Voltage - Supply [Min]	Voltage - Supply [Max]	Package / Case	Package / Case
Texas Instruments LM1971M	Volume Control	1	Communication Systems	85 °C	-40 °C	8-SOIC	3.9 mm	0.154 in	Surface Mount	115 dB	SPI	8-SOIC	4.5 V	12 V
Texas Instruments LM1971MX/NOPB	Volume Control	1	Communication Systems	85 °C	-40 °C	8-SOIC	3.9 mm	0.154 in	Surface Mount	115 dB	SPI	8-SOIC	4.5 V	12 V
Texas Instruments LM1971N/NOPB	Volume Control	1	Communication Systems	85 °C	-40 °C	8-DIP			Through Hole	115 dB	SPI	8-PDIP	4.5 V	12 V	0.3 in	7.62 mm
Texas Instruments LM1971MX	Volume Control	1	Communication Systems	85 °C	-40 °C	8-SOIC	3.9 mm	0.154 in	Surface Mount	115 dB	SPI	8-SOIC	4.5 V	12 V
Texas Instruments LM1971M/NOPB	Volume Control	1	Communication Systems	85 °C	-40 °C	8-SOIC	3.9 mm	0.154 in	Surface Mount	115 dB	SPI	8-SOIC	4.5 V	12 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 2.43
		10	$ 2.18
		25	$ 2.06
		100	$ 1.75
		250	$ 1.65
		500	$ 1.44
		1000	$ 1.19
	Digi-Reel®	1	$ 2.43
		10	$ 2.18
		25	$ 2.06
		100	$ 1.75
		250	$ 1.65
		500	$ 1.44
		1000	$ 1.19
	Tape & Reel (TR)	2500	$ 1.11
		5000	$ 1.07
Texas Instruments	LARGE T&R	1	$ 1.83
		100	$ 1.51
		250	$ 1.08
		1000	$ 0.81

Description

General part information

LM1971 Series

The LM1971 is a digitally controlled single channel audio attenuator fabricated on a CMOS process. Attenuation is variable in 1 dB steps from 0 dB to −62 dB. A mute function disconnects the input from the output, providing over 100 dB of attenuation.

The performance of the device is exhibited by its ability to change attenuation levels without audible clicks or pops. In addition, the LM1971 features a low Total Harmonic Distortion (THD) of 0.0008%, and a Dynamic Range of 115 dB, making it suitable for digital audio needs. The LM1971 is available in both 8-pin plastic PDIP or SOIC packages.

The LM1971 is controlled by a TTL/CMOS compatible 3-wire serial digital interface. The active low LOAD line enables the data input registers while the CLOCK line provides system timing. Its DATA pin receives serial data on the rising edge of each CLOCK pulse, allowing the desired attenuation setting to be selected.

Documents

Technical documentation and resources

LM1971 Overture Audio Atten Series Dig Controlled 62 dB Audio Attenuator w/Mute datasheet (Rev. B)

Data sheet