LM4985TMEVAL datasheet(7/33 Pages) TI1

7 / 33 page

LM4985, LM4985TMEVAL

www.ti.com

SNAS346B – MAY 2006 – REVISED MAY 2006

Electrical Characteristics VDD = 3.6V

(1)(2) (continued)

The following specifications apply for RL = 16Ω, f = 1kHz, and CB = 4.7µF unless otherwise specified. Limits apply to TA =

25°C.

Symbol

Parameter

Conditions

LM4985

Units

(Limits)

Typ(3)

Limit(4)(5)

CBYPASS= 4.7μF

(7)

WT1 = 0, WT0 = 0

OCL

C-CUPL

222

WT1 = 0, WT0 = 1

OCL

TWU

Wake Up Time from Shutdown

C-CUPL

405

msec

WT1 = 1, WT0 = 0

OCL

143

C-CUPL

774

WT1 = 1, WT0 =1

OCL

246

C-CUPL

1532

Stereo mode

RIN

Input Resistance

Ω

Mono mode

AVMIN

Minimum Gain

Code = 00000

–76

–72

dB (max)

AVMAX

Maximum Gain

Code = 11111

dB (min)

18dB

≥ AV ≥–44dB

± 0.5

± 1.0

ΔAV

Gain Accuracy per Step

–44dB

≥ AV > –76dB

± 1.0

± 2.0

OCL

VOS

Output Offset Voltage

RLOAD = 32Ω

2.0

mV (max)

VIN = AC GND

(7)

The wake-up time (TWU) is calculated using the following formula; TWU = [CBYPASS (VDD) / 2 (IBYPASS)] + 40ms.

Electrical Characteristics VDD = 2.5V

(1) (2)

The following specifications apply for RL = 16Ω, f = 1kHz, and CB = 4.7µF unless otherwise specified. Limits apply to TA =

25°C.

Symbol

Parameter

Conditions

LM4985

Units

(Limits)

Typ(3)

Limit(4)(5)

VIN = 0V, IOUT = 0A

Single-Channel no load OCL

1.6

IDD

Quiescent Power Supply Current

Single-Channel no load C-CUPL

Dual-Channel no load OCL

2.1

Dual-Channel no load C-CUPL

1.6

ISD

Shutdown Current

VSHUTDOWN = GND

0.1

µA

VSDIH

Logic Voltage Input High

1.75

V (min)

VSDIL

Logic Voltage Input Low

0.75

V (max)

THD+N < 1%, fIN = 1kHz

RLOAD = 16Ω OCL

Output Power

RLOAD = 16Ω C-CUPL

RLOAD = 32Ω OCL

RLOAD = 32Ω C-CUPL

(1)

All voltages are measured with respect to the GND 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)

Typicals are measured at 25°C and represent the parametric norm.

(4)

Limits are specified to Texas Instruments' AOQL (Average Outgoing Quality Level).

(5)

Datasheet min/max specification limits are specified by design, test, or statistical analysis.

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