TS4994IST STMicroelectronics, TS4994IST Datasheet

IC AMP AUDIO PWR 1W MONO 8MSOP

TS4994IST

Manufacturer Part Number
TS4994IST
Description
IC AMP AUDIO PWR 1W MONO 8MSOP
Manufacturer
STMicroelectronics
Type
Class ABr
Datasheet

Specifications of TS4994IST

Output Type
1-Channel (Mono)
Max Output Power X Channels @ Load
1W x 1 @ 8 Ohm
Voltage - Supply
2.5 V ~ 5.5 V
Features
Depop, Differential Inputs, Short-Circuit and Thermal Protection, Standby
Mounting Type
Surface Mount
Package / Case
8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
For Use With
497-6396 - BOARD EVAL FOR LV TS4984IQT497-6395 - BOARD EVAL FOR LP DIFF TS4994IQT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-4452-2
Features
Description
The TS4994 is an audio power amplifier capable
of delivering 1W of continuous RMS output power
into an 8Ω load @ 5V. Due to its differential inputs,
it exhibits outstanding noise immunity.
An external standby mode control reduces the
supply current to less than 10nA. An STBY
MODE pin allows the standby to be active HIGH
or LOW (except in the MiniSO-8 version). An
internal thermal shutdown protection is also
provided, making the device capable of sustaining
short-circuits.
The device is equipped with common mode
feedback circuitry allowing outputs to be always
Order codes
December 2006
TS4994IQT
TS4994IST
Differential inputs
Near-zero pop & click
100dB PSRR @ 217Hz with grounded inputs
Operating range from V
1W rail-to-rail output power @ V
THD = 1%, F = 1kHz, with 8Ω load
90dB CMRR @ 217Hz
Ultra-low consumption in standby mode (10nA)
Selectable standby mode (active low or active
high)
Ultra fast startup time: 15ms typ.
Available in DFN10 3x3 (0.5mm pitch) &
MiniSO-8
All lead-free packages
Part number
Temperature range
-40°C to +85°C
CC
1W differential input/output audio power amplifier
= 2.5V to 5.5V
CC
= 5V,
MiniSO-8
Rev 6
Package
DFN10
biased at V
mode voltage.
The TS4994 is designed for high quality audio
applications such as mobile phones and requires
few external components.
Applications
Mobile phones (cellular / cordless)
Laptop / notebook computers
PDAs
Portable audio devices
CC
Pin connections (top view)
STBY MODE
STBY MODE
BYPASS
BYPASS
STBY
STBY
with selectable standby
/2 regardless of the input common
BYPASS
BYPASS
TS4994IST - MiniSO-8
V
V
V
V
Tape & reel
TS4994IQT - DFN10
STBY
STBY
IN-
IN-
IN+
IN+
Packing
V
V
V
V
IN +
IN +
IN -
IN -
1
1
1
2
2
2
3
3
3
4
4
4
5
5
5
1
1
2
2
3
3
4
4
8
8
7
7
6
6
5
5
10
10
10
TS4994
9
9
9
8
8
8
7
7
7
6
6
6
Marking
GND
GND
V
V
Vcc
Vcc
V
V
V
V
V
V
N/C
N/C
GND
GND
V
V
O-
O-
O+
O+
O+
O+
DD
DD
K994
K994
O-
O-
www.st.com
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35

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TS4994IST Summary of contents

Page 1

... Pin connections (top view) TS4994IQT - DFN10 STBY STBY STBY MODE STBY MODE N/C N GND GND BYPASS BYPASS TS4994IST - MiniSO-8 STBY STBY Vcc Vcc IN- IN GND GND IN+ IN+ BYPASS BYPASS regardless of the input common CC Packing Marking K994 Tape & reel K994 1/35 www.st.com 35 ...

Page 2

Contents Contents 1 Application component information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Absolute maximum ratings and ...

Page 3

TS4994 1 Application component information Components C Supply bypass capacitor that provides power supply filtering Bypass capacitor that provides half supply filtering. b Feedback resistor that sets the closed loop gain in conjunction with R R feed A ...

Page 4

Application component information Figure 2. Typical application, MiniSO-8 version Diff. input - Cin1 220nF Cin2 GND 220nF Diff. Input + Optional 4/35 Rfeed1 20k Rin1 2 Vin- 20k Rin2 3 Vin+ 20k 4 Bypass + Cb 1u Stdby GND 1 ...

Page 5

TS4994 2 Absolute maximum ratings and operating conditions Table 1. Absolute maximum ratings Symbol (1) V Supply voltage CC (2) V Input voltage i T Operating free air temperature range oper T Storage temperature stg T Maximum junction temperature j ...

Page 6

Electrical characteristics 3 Electrical characteristics Table 3. Electrical characteristics for V specified) Symbol Supply current input signal, no load Standby current I No input signal, V STBY STBY No input signal, V STBY Differential output offset voltage ...

Page 7

TS4994 Table 4. Electrical characteristics for V correlation measurements at 2.6V and 5V), GND = 0V, T specified) Symbol I Supply current no input signal, no load CC Standby current I No input signal, V STBY STBY No input signal, ...

Page 8

Electrical characteristics Table 5. Electrical characteristics for V specified) Symbol Supply current input signal, no load Standby current I No input signal, V STBY STBY No input signal, V STBY Differential output offset voltage ...

Page 9

TS4994 Figure 3. Current consumption vs. power supply voltage 4.0 No load Tamb=25 ° C 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 Power Supply Voltage (V) Figure 5. Current consumption vs. power supply voltage 3.5 3.0 ...

Page 10

Electrical characteristics Figure 9. Power dissipation vs. output power 0.3 RL=8 Ω 0.2 0.1 RL=16 Ω 0.0 0.0 0.1 0.2 Output Power (W) Figure 11. Output power vs. power supply voltage 1 μ 1kHz ...

Page 11

TS4994 Figure 15. Power derating curves 0.6 Nominal Value 0.4 AMR Value 0.2 0 Ambiant Temperature ( C) Figure 17. Open loop gain vs. frequency 60 Gain 40 20 Phase 0 Vcc = 3.3V - ...

Page 12

Electrical characteristics Figure 21. Closed loop gain vs. frequency 10 Gain 0 -10 -20 Vcc = 2.6V - Ω + 500pF Tamb = 25 ° C -40 0 100 Frequency (kHz) Figure ...

Page 13

TS4994 Figure 27. PSRR vs. frequency 0 -10 Vcc = 2.6V -20 Vripple = 200mVpp Inputs = Grounded - 2.5, Cin = 4.7 μ F -40 RL ≥ 8 Ω -50 Tamb = 25 ° C Cb=0.47 μ ...

Page 14

Electrical characteristics Figure 33. PSRR vs. common mode input voltage 0 Vcc = 2.5V Vripple = 200mVpp Inputs Grounded - 217Hz -40 RL ≥ 8 Ω Tamb = 25 ° C -60 Cb=0 -80 -100 ...

Page 15

TS4994 Figure 39. CMRR vs. frequency 0 Vcc = 2.6V -10 Vic = 200mVpp - 2.5, Cin = 470 μ ≥ 8 Ω -30 Tamb = 25 ° C -40 Cb=1 μ F -50 Cb=0.47 μ ...

Page 16

Electrical characteristics Figure 45. THD+N vs. output power Ω 1kHz Vcc=2. μ < 125kHz Vcc=3.3V Tamb = 25 ° C Vcc=5V 0.1 0.01 1E-3 0.01 ...

Page 17

TS4994 Figure 51. THD+N vs. output power Ω Vcc=2. 20Hz Vcc=3. μ < 125kHz Tamb = 25 ° C 0.1 Vcc=5V 0.01 1E-3 1E-3 0.01 ...

Page 18

Electrical characteristics Figure 57. THD+N vs. output power Ω Vcc = F=20kHz < 125kHz Tamb = 25 ° C F=1kHz 0.1 F=20Hz 0.01 1E-3 0.01 Output Power ...

Page 19

TS4994 Figure 63. THD+N vs. frequency Ω 7 μ < 125kHz Vcc=2.6V, Po=225mW 1 Tamb = 25 ° C 0.1 0.01 20 100 1000 Frequency (Hz) Figure 65. THD+N ...

Page 20

Electrical characteristics Figure 69. Startup time vs. bypass capacitor 20 Tamb=25 ° C Vcc= Vcc=2.6V 0 0.0 0.4 0.8 1.2 Bypass Capacitor 20/35 Vcc=3.3V 1.6 2.0 TS4994 ...

Page 21

TS4994 4 Application information 4.1 Differential configuration principle The TS4994 is a monolithic full-differential input/output power amplifier. The TS4994 also includes a common mode feedback loop that controls the output bias value to average for any ...

Page 22

Application information the values following formula: with The result of the calculation must be in the range: If the result of the V used. Example: With V higher than 2.5V - 0.9V = 1.6V, so input coupling ...

Page 23

TS4994 must introduce a mismatch factor (R performance. ● From 200Hz to 5kHz, the C compared with R this range, we can reach the PSRR performance of the TS4994 itself. ● From 5kHz to 20kHz, the C and the C ...

Page 24

Application information The three following graphs show PSRR versus frequency and versus bypass capacitor C worst-case conditions ( Figure 70. PSRR vs. frequency (worst case conditions) 0 -10 Vcc = 5V, Vripple = 200mVpp - Cin = ...

Page 25

TS4994 The two following graphs show typical applications of the TS4994 with a random selection of Δ four R/R values with a 0.1% tolerance. Figure 73. PSRR vs. frequency with random choice condition 0 -10 Vcc = 5V, Vripple = ...

Page 26

Application information Figure 75. CMR vs. frequency (worst case conditions) 0 Vcc = 5V Vic = 200mVpp - Cin = 470 μ F Δ R/R = 0.1%, RL ≥ 8 Ω -20 Tamb = 25 ° C ...

Page 27

TS4994 and Therefore, the average current delivered by the supply voltage is: Equation 1 The power delivered by the supply voltage is: Therefore, the power dissipated by each amplifier is: Equation 2 and the maximum value is obtained when: and ...

Page 28

Application information To calculate the maximum ambient temperature T ● The value of the power supply voltage, V ● The value of the load resistor, R ● The R value for the package type thja Example 5V, R ...

Page 29

TS4994 4.10 Shutdown time When the standby command is set, the time required to put the two output stages in high impedance and the internal circuitry in shutdown mode is a few microseconds. Note: In shutdown mode, the Bypass pin ...

Page 30

Application information The component calculations remain the same, except for the gain. In single-ended input configuration, the formula is: 4.13 Demoboard A demoboard for the TS4994 is available designed for the TS4994 in the DFN10 package. However, we ...

Page 31

... JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics trademark. ECOPACK specifications are available at: www.st.com. Package mechanical data ...

Page 32

Package mechanical data ackage 5.1 DFN10 p Ref 32/35 Dimensions Millimeters Min. Typ. Max. 0.80 0.90 1.00 0.02 0.05 0.70 0.20 0.18 0.23 0.30 3.00 2.21 2.26 2.31 3.00 ...

Page 33

TS4994 5.2 MiniSO-8 package Ref Dimensions Millimeters Min. Typ. Max. 1.1 0.05 0.10 0.15 0.78 0.86 0.94 0.25 0.33 0.40 0.13 0.18 0.23 2.90 3.00 3.10 4.75 4.90 ...

Page 34

Revision history 6 Revision history Date 1-Sep-2003 1-Oct-2004 2-Jan-2005 2-Apr-2005 15-Nov- 2005 12-Dec-2006 34/35 Revision 1 Initial release. 2 Curves updated in the document. 4 Update mechanical data on flip-chip package. 4 Remove data on flip-chip package. 5 Mechanical data ...

Page 35

... TS4994 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...

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