Datasheet

LM4938
SNAS245B –FEBRUARY 2005–REVISED MAY 2013 www.ti.com
Electrical Characteristics for Entire IC
(1)(2)
The following specifications apply for V
DD
= 5V unless otherwise noted. Limits apply for T
A
= 25°C.
LM4938
Units
Symbol Parameter Conditions
(Limits)
Typical
(3)
Limit
(4)
V
DD
Supply Voltage 2.7 V (min)
5.5 V (max)
I
DD
Quiescent Power Supply Current V
IN
= 0V, I
O
= 0A 11 30 mA (max)
I
SD
Shutdown Current V
shutdown
= V
DD
0.5 2.0 μA (max)
V
IH
Headphone Sense High Input Voltage 4 V (min)
V
IL
Headphone Sense Low Input Voltage 0.8 V (max)
(1) All voltages are measured with respect to the ground pins, unless otherwise specified. All specifications are tested using the typical
application as shown in Figure 1.
(2) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the
Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication
of device performance.
(3) Typicals are measured at 25°C and represent the parametric norm.
(4) Limits are specified to Texas Instruments' AOQL (Average Outgoing Quality Level). Datasheet min/max specification limits are specified
by design, test, or statistical analysis.
Electrical Characteristics for Volume Attenuators
(1)(2)
The following specifications apply for V
DD
= 5V. Limits apply for T
A
= 25°C.
LM4938
Units
Symbol Parameter Conditions
(Limits)
Typical
(3)
Limit
(4)
Gain accuracy with V
DCVol
= 5V,
±0.5 ±0.75 dB (max)
No Load
Gain accuracy with V
DCVol
< 0.5V,
C
RANGE
Attenuator Range ±2 dB (max)
No Load
Attenuation with V
DCVol
= 0V dB (min)
89 75
(BM & SE)
A
M
Mute Attenuation V
mute
= 5V, Bridged Mode (BM) 89 78 dB (min)
V
mute
= 5V, Single-Ended Mode (SE) 78 dB (min)
(1) All voltages are measured with respect to the ground pins, unless otherwise specified. All specifications are tested using the typical
application as shown in Figure 1.
(2) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the
Operating Ratings. Specifications are not ensured for parameters where no limit is given, however, the typical value is a good indication
of device performance.
(3) Typicals are measured at 25°C and represent the parametric norm.
(4) Limits are specified to Texas Instruments' AOQL (Average Outgoing Quality Level). Datasheet min/max specification limits are specified
by design, test, or statistical analysis.
4 Submit Documentation Feedback Copyright © 2005–2013, Texas Instruments Incorporated
Product Folder Links: LM4938