Datasheet

LM4670
SNAS240C –DECEMBER 2004–REVISED MAY 2013 www.ti.com
Electrical Characteristics
(1)(2)
The following specifications apply for A
V
= 2V/V (R
I
= 150kΩ), R
L
= 15µH + 8Ω + 15µH unless otherwise specified. Limits
apply for T
A
= 25°C.
LM4670
Units
Symbol Parameter Conditions
(Limits)
Typical
(3)
Limit
(4)(5)
V
I
= 0V, A
V
= 2V/V,
|V
OS
| Differential Output Offset Voltage 25 mV (max)
V
DD
= 2.4V to 5.0V
V
DD
= 2.4V to 5.0V,
PSRR
GSM
GSM Power Supply Rejection Ratio 64 dB
Input Referred
V
DD
= 2.4V to 5.0V
V
IC
= V
DD
/2 to 0.5V,
CMRR
GSM
GSM Common Mode Rejection Ratio 80 dB
V
IC
= V
DD
/2 to V
DD
– 0.8V,
Input Referred
|I
IH
| Logic High Input Current V
DD
= 5.0V, V
I
= 5.8V 20 100 μA (max)
|I
IL
| Logic Low Input Current V
DD
= 5.0V, V
I
= –0.3V 1 5 μA (max)
V
IN
= 0V, No Load, V
DD
= 5.0V 7.0 10 mA (max)
I
DD
Quiescent Power Supply Current V
IN
= 0V, No Load, V
DD
= 3.6V 4.8 mA
V
IN
= 0V, No Load, V
DD
= 2.4V 3.8 5 mA (max)
V
SHUTDOWN
= 0V
I
SD
Shutdown Current
(6)
0.01 1 μA (max)
V
DD
= 2.4V to 5.0V
V
SDIH
Shutdown voltage input high 1.0 1.4 V (min)
V
SDIL
Shutdown voltage input low 0.8 0.4 V (max)
R
OSD
Output Impedance V
SHUTDOWN
= 0.4V >100 kΩ
270kΩ/R
I
V/V (min)
A
V
Gain 300kΩ/R
I
330kΩ/R
I
V/V (max)
Resistance from Shutdown Pin to
R
SD
300 kΩ
GND
R
L
= 15μH + 4Ω + 15μH,
THD = 10% (max)
f = 1kHz, 22kHz BW
V
DD
= 5V 3.0 W
V
DD
= 3.6V 1.5 W
V
DD
= 2.5V 675 mW
P
O
Output Power
(7)(8)
R
L
= 15μH + 4Ω + 15μH,
THD+N = 1% (max)
f = 1kHz, 22kHz BW
V
DD
= 5V, 2.3 W
V
DD
= 3.6V, 1.2 W
V
DD
= 2.5V, 550 mW
(1) All voltages are measured with respect to the ground pin, unless otherwise specified.
(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) Typical specifications are specified at 25°C and represent the parametric norm.
(4) Tested limits are specified to Texas Instruments' AOQL (Average Outgoing Quality Level).
(5) Datasheet min/max specification limits are ensured by design, test, or statistical analysis.
(6) Shutdown current is measured in a normal room environment. Exposure to direct sunlight will increase I
SD
by a maximum of 2µA. The
Shutdown pin should be driven as close as possible to GND for minimal shutdown current. See Application Information under
SHUTDOWN FUNCTION for more information.
(7) Typical output power numbers are for the LM4670 in the ITL (DSBGA) package. In the WSON (SDA) package, the output power will be
lower due to higher resistance seen from the IC output pad to PCB trace. The difference increases with lower impedance loads.
(8) The maximum operating voltage for the LM4670 in the SDA (WSON) package when driving 4Ω loads to greater than 10% THD+N is
5.0V.
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