SGS Thomson Microelectronics TS421IST, TS421IDT, TS421ID, TS421, TS419IST Datasheet

TS419

TS421

360mW MONO AMPLIFIER WITH STANDBY MODE

■OPERATING FROM Vcc=2V to 5.5V

■STANDBY MODE ACTIVE HIGH (TS419) or LOW (TS421)

■OUTPUT POWER into 16Ω: 367mW @ 5V with 10% THD+N max or 295mW @5V and 110mW @3.3V with 1% THD+N max.

■LOW CURRENT CONSUMPTION: 2.5mA max

■High Signal-to-Noise ratio: 95dB(A) at 5V

■PSRR: 56dB typ. at 1kHz, 46dB at 217Hz

■SHORT CIRCUIT LIMITATION

■ON/OFF click reduction circuitry

■Available in SO8, MiniSO8 & DFN 3x3

DESCRIPTION

The TS419/TS421 is a monaural audio power amplifier driving in BTL mode a 16 or 32Ω earpiece or receiver speaker. The main advantage of this configuration is to get rid of bulky ouput capacitors.

Capable of descending to low voltages, it delivers up to 220mW per channel (into 16Ω loads) of continuous average power with 0.2% THD+N in the audio bandwidth from a 5V power supply.

An externally controlled standby mode reduces the supply current to 10nA (typ.). The TS419/ TS421 can be configured by external gain-setting resistors or used in a fixed gain version.

APPLICATIONS

■16/32 ohms earpiece or receiver speaker driver

■Mobile and cordless phones (analog / digital)

■PDAs & computers

■Portable appliances

ORDER CODE

Part	Temp.		Package
	Range:					Gain	Marking
Number	I		D	S	Q
TS419			∙			external	TS419I
TS421			∙			external	TS421I
TS419				∙	∙	external	K19A
TS419-2				tba	tba	x2/6dB	K19B
TS419-4	-40, +85°C			tba	tba	x4/12dB	K19C
TS419-8				tba	tba	x8/18dB	K19D
TS421				∙	∙	external	K21A
TS421-2				tba	tba	x2/6dB	K21B
TS421-4				tba	tba	x4/12dB	K21C
TS421-8				tba	tba	x8/18dB	K21D

PIN CONNECTIONS (top view)

TS419IDT: SO8

TS419IST, TS419-xIST: MiniSO8

Standby	1	8	VOUT2
Bypass	2	7	GND
VIN+	3	6	VCC
VIN-	4	5	VOUT1

TS419IQT, TS419-xIQT: DFN8

GND	1	8	Vcc
VOUT 2	2	7	VOUT 1
STANDBY	3	6	VIN-
BYPASS	4	5	VIN+

TS421IDT: SO8

TS421IST, TS421-xIST: MiniSO8

TS421IQT, TS421-xIQT: DFN8

GND		1	8	Vcc
VOUT 2		2	7	VOUT 1
		3	6	VIN-
STANDBY
BYPASS		4	5	VIN+

MiniSO & DFN only available in Tape & Reel with T suffix. SO is available in Tube (D) and in Tape & Reel (DT)

June 2003

1/32

TS419-TS421

ABSOLUTE MAXIMUM RATINGS

	Symbol	Parameter	Value	Unit
	VCC	Supply voltage 1)	6	V
	Vi	Input Voltage	-0.3V to VCC +0.3V	V
	Tstg	Storage Temperature	-65 to +150	°C
	Tj	Maximum Junction Temperature	150	°C
	Rthja	Thermal Resistance Junction to Ambient		°C/W
		SO8	175
		MiniSO8	215
		DFN8	70
		Power Dissipation 2)	0.71
	Pd	SO8		W
		MiniSO8	0.58
		DFN8	1.79
	ESD	Human Body Model (pin to pin): TS4193), TS421	1.5	kV
	ESD	Machine Model - 220pF - 240pF (pin to pin)	100	V
	Latch-up	Latch-up Immunity (All pins)	200	mA
		Lead Temperature (soldering, 10sec)	250	°C
		Output Short-Circuit to Vcc or GND	continous 4)

1.All voltage values are measured with respect to the ground pin.

2.Pd has been calculated with Tamb = 25°C, Tjunction = 150°C.

3.TS419 stands 1.5KV on all pins except standby pin which stands 1KV.

4.Attention must be paid to continous power dissipation (VDD x 300mA). Exposure of the IC to a short circuit for an extended time period is dramatically reducing product life expectancy.

OPERATING CONDITIONS

	Symbol	Parameter	Value	Unit
	VCC	Supply Voltage	2 to 5.5	V
	RL	Load Resistor	³ 16	W
	Toper	Operating Free Air Temperature Range	-40 to + 85	°C
		Load Capacitor
	CL	RL = 16 to 100W	400	pF
		RL > 100W	100
	VICM	Common Mode Input Voltage Range	GND to VCC-1V	V
	VSTB	Standby Voltage Input	1.5 £ VSTB £ VCC
		TS421 ACTIVE / TS419 in STANDBY		V
		TS421 in STANDBY / TS419 ACTIVE	GND £ VSTB £ 0.4 1)
		Thermal Resistance Junction to Ambient
	RTHJA	SO8	150	°C/W
		MiniSO8	190
		DFN8 2)	41
	Twu	Wake-up time from standby to active mode (Cb = 1µF) 3)	³ 0.12	s

1.The minimum current consumption (ISTANDBY) is guaranteed at VCC (TS419) or GND (TS421) for the whole temperature range.

2.When mounted on a 4-layer PCB

3.For more details on TWU, please refer to application note section on Wake-up time page 28.

2/32

TS419-TS421

FIXED GAIN VERSION SPECIFIC ELECTRICAL CHARACTERISTICS

VCC from +5V to +2V, GND = 0V, Tamb = 25°C (unless otherwise specified)

Symbol	Parameter	Min.	Typ.	Max.	Unit
RIN	Input Resistance		20		kΩ
	Gain value for Gain TS419/TS421-2		6dB
G	Gain value for Gain TS419/TS421-4		12dB		dB
	Gain value for Gain TS419/TS421-8		18dB

APPLICATION COMPONENTS INFORMATION

	Components	Functional Description
	RIN	Inverting input resistor which sets the closed loop gain in conjunction with RFEED. This resistor also
		forms a high pass filter with CIN (fcl = 1 / (2 x Pi x RIN x CIN)). Not needed in fixed gain versions.
	CIN	Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminal
	RFEED	Feedback resistor which sets the closed loop gain in conjunction with RIN.
		AV= Closed Loop Gain= 2xRFEED/RIN. Not needed in fixed gain versions.
	CS	Supply Bypass capacitor which provides power supply filtering.
	CB	Bypass capacitor which provides half supply filtering.

TYPICAL APPLICATION SCHEMATICS:

3/32

TS419-TS421

ELECTRICAL CHARACTERISTICS

VCC = +5V, GND = 0V, Tamb = 25°C (unless otherwise specified)

Symbol		Parameter	Min.	Typ.	Max.	Unit
ICC	Supply Current
	No input signal, no load			1.8	2.5	mA
	Standby Current
ISTANDBY	No input signal, VSTANDBY=GND for TS421			10	1000	nA
	No input signal, VSTANDBY=Vcc for TS419
Voo	Output Offset Voltage			5	25	mV
	No input signal, RL = 16 or 32Ω, Rfeed=20kΩ
	Output Power
	THD+N = 0.1% Max, F = 1kHz, RL = 32Ω			190
	THD+N =	1% Max, F = 1kHz, RL = 32Ω	166	207
PO	THD+N = 10% Max, F = 1kHz, RL = 32Ω			258		mW
	THD+N = 0.1% Max, F = 1kHz, RL = 16Ω		240	270
	THD+N =	Ω		295
		1% Max, F = 1kHz, RL = 16		367
	THD+N = 10% Max, F = 1kHz, RL = 16Ω
	Total Harmonic Distortion + Noise (Av=2)
THD + N	RL = 32Ω, Pout = 150mW, 20Hz ≤ F ≤ 20kHz			0.15		%
	RL = 16Ω, Pout = 220mW, 20Hz ≤ F ≤ 20kHz			0.2
PSRR	Power Supply Rejection Ratio (A =2) 1)		50	56		dB
		v
	F = 1kHz, Vripple = 200mVpp, input grounded, Cb=1µF
SNR	Signal-to-Noise Ratio (Filter Type A, A =2) 1)		85	98		dB
		v
	(RL = 32Ω, THD +N < 0.5%, 20Hz ≤ F ≤ 20kHz)
ΦM	Phase Margin at Unity Gain			58		Degrees
	RL = 16Ω, CL = 400pF
GM	Gain Margin			18		dB
	RL = 16Ω, CL = 400pF
GBP	Gain Bandwidth Product			1.1		MHz
	RL = 16Ω
SR	Slew Rate			0.4		V/μS
	RL = 16Ω

1. Guaranteed by design and evaluation.

4/32

TS419-TS421

ELECTRICAL CHARACTERISTICS

VCC = +3.3V, GND = 0V, Tamb = 25°C (unless otherwise specified) 1)

Symbol		Parameter	Min.	Typ.	Max.	Unit
ICC	Supply Current
	No input signal, no load			1.8	2.5	mA
	Standby Current
ISTANDBY	No input signal, VSTANDBY=GND for TS421			10	1000	nA
	No input signal, VSTANDBY=Vcc for TS419
Voo	Output Offset Voltage			5	25	mV
	No input signal, RL = 16 or 32Ω, Rfeed=20kΩ
	Output Power
	THD+N = 0.1% Max, F = 1kHz, RL = 32Ω			75
	THD+N =	1% Max, F = 1kHz, RL = 32Ω	65	81
PO	THD+N = 10% Max, F = 1kHz, RL = 32Ω			102		mW
	THD+N = 0.1% Max, F = 1kHz, RL = 16Ω		91	104
	THD+N =	Ω		113
		1% Max, F = 1kHz, RL = 16		143
	THD+N = 10% Max, F = 1kHz, RL = 16Ω
	Total Harmonic Distortion + Noise (Av=2)
THD + N	RL = 32Ω, Pout = 50mW, 20Hz ≤ F ≤ 20kHz			0.15		%
	RL = 16Ω, Pout = 70mW, 20Hz ≤ F ≤ 20kHz			0.2
PSRR	Power Supply Rejection Ratio		50	56		dB
	inputs grounded, F = 1kHz, Vripple = 200mVpp, Cb=1µF
SNR	Signal-to-Noise Ratio (Weighted A, Av=2)		82	94		dB
	(RL = 32Ω, THD +N < 0.5%, 20Hz ≤ F ≤ 20kHz)
ΦM	Phase Margin at Unity Gain			58		Degrees
	RL = 16Ω, CL = 400pF
GM	Gain Margin			18		dB
	RL = 16Ω, CL = 400pF
GBP	Gain Bandwidth Product			1.1		MHz
	RL = 16Ω
SR	Slew Rate			0.4		V/μS
	RL = 16Ω

1.All electrical values are guaranted with correlation measurements at 2V and 5V

5/32

TS419-TS421

ELECTRICAL CHARACTERISTICS

VCC = +2.5V, GND = 0V, Tamb = 25°C (unless otherwise specified) 1)

Symbol		Parameter	Min.	Typ.	Max.	Unit
ICC	Supply Current
	No input signal, no load			1.7	2.5	mA
	Standby Current
ISTANDBY	No input signal, VSTANDBY=GND for TS421			10	1000	nA
	No input signal, VSTANDBY=Vcc for TS419
Voo	Output Offset Voltage			5	25	mV
	No input signal, RL = 16 or 32Ω, Rfeed=20kΩ
	Output Power
	THD+N = 0.1% Max, F = 1kHz, RL = 32Ω			37
	THD+N =	1% Max, F = 1kHz, RL = 32Ω	32	41
PO	THD+N = 10% Max, F = 1kHz, RL = 32Ω			52		mW
	THD+N = 0.1% Max, F = 1kHz, RL = 16Ω		44	50
	THD+N =	Ω		55
		1% Max, F = 1kHz, RL = 16		70
	THD+N = 10% Max, F = 1kHz, RL = 16Ω
	Total Harmonic Distortion + Noise (Av=2)
THD + N	RL = 32Ω, Pout = 30mW, 20Hz ≤ F ≤ 20kHz			0.15		%
	RL = 16Ω, Pout = 40mW, 20Hz ≤ F ≤ 20kHz			0.2
PSRR	Power Supply Rejection Ratio (Av=2)		50	56		dB
	inputs grounded, F = 1kHz, Vripple = 200mVpp, Cb=1µF
SNR	Signal-to-Noise Ratio (Weighted A, Av=2)		80	91		dB
	(RL = 32Ω, THD +N < 0.5%, 20Hz ≤ F ≤ 20kHz)
ΦM	Phase Margin at Unity Gain			58		Degrees
	RL = 16Ω, CL = 400pF
GM	Gain Margin			18		dB
	RL = 16Ω, CL = 400pF
GBP	Gain Bandwidth Product			1.1		MHz
	RL = 16Ω
SR	Slew Rate			0.4		V/μS
	RL = 16Ω

1.All electrical values are guaranted with correlation measurements at 2V and 5V

6/32

TS419-TS421

ELECTRICAL CHARACTERISTICS

VCC = +2V, GND = 0V, Tamb = 25°C (unless otherwise specified)

Symbol		Parameter	Min.	Typ.	Max.	Unit
ICC	Supply Current
	No input signal, no load			1.7	2.5	mA
	Standby Current
ISTANDBY	No input signal, VSTANDBY=GND for TS421			10	1000	nA
	No input signal, VSTANDBY=Vcc for TS419
Voo	Output Offset Voltage			5	25	mV
	No input signal, RL = 16 or 32Ω, Rfeed=20kΩ
	Output Power
	THD+N = 0.1% Max, F = 1kHz, RL = 32Ω			20
	THD+N =	1% Max, F = 1kHz, RL = 32Ω	19	23
PO	THD+N = 10% Max, F = 1kHz, RL = 32Ω			30		mW
	THD+N = 0.1% Max, F = 1kHz, RL = 16Ω		24	26
	THD+N =	Ω		30
		1% Max, F = 1kHz, RL = 16		40
	THD+N = 10% Max, F = 1kHz, RL = 16Ω
	Total Harmonic Distortion + Noise (Av=2)
THD + N	RL = 32Ω, Pout = 13mW, 20Hz ≤ F ≤ 20kHz			0.1		%
	RL = 16Ω, Pout = 20mW, 20Hz ≤ F ≤ 20kHz			0.15
PSRR	Power Supply Rejection Ratio (A =2) 1)		49	54		dB
		v
	inputs grounded, F = 1kHz, Vripple = 200mVpp, Cb=1µF
SNR	Signal-to-Noise Ratio (Weighted A, A =2) 1)		80	89		dB
		v
	(RL = 32Ω, THD +N < 0.5%, 20Hz ≤ F ≤ 20kHz)
ΦM	Phase Margin at Unity Gain			58		Degrees
	RL = 16Ω, CL = 400pF
GM	Gain Margin			20		dB
	RL = 16Ω, CL = 400pF
GBP	Gain Bandwidth Product			1.1		MHz
	RL = 16Ω
SR	Slew Rate			0.4		V/μS
	RL = 16Ω

1. Guaranteed by design and evaluation.

7/32

TS419-TS421

Index of Graphs

Description	Figure	Page
Common Curves
Open Loop Gain and Phase vs Frequency	1 to 12	9 to 10
Current Consumption vs Power Supply Voltage	13	11
Current Consumption vs Standby Voltage	14 to 19	11 to 12
Output Power vs Power Supply Voltage	20 to 23	12
Output Power vs Load Resistor	24 to 27	12 to 13
Power Dissipation vs Output Power	28 to 31	13 to 14
Power Derating vs Ambiant Temperature	32	14
Output Voltage Swing vs Supply Voltage	33	14
Low Frequency Cut Off vs Input Capacitor	34	14
Curves With 6dB Gain Setting (Av=2)
THD + N vs Output Power	35 to 43	15 to 16
THD + N vs Frequency	44 to 46	16
Signal to Noise Ratio vs Power Supply Voltage	47 to 48	17
Noise Floor	49 to 50	17
PSRR vs Frequency	51 to 55	17 to 18
Curves With 12dB Gain Setting (Av=4)
THD + N vs Output Power	56 to 64	19 to 20
THD + N vs Frequency	65 to 67	20
Signal to Noise Ratio vs Power Supply Voltage	68 to 69	21
Noise Floor	70 to 71	21
PSRR vs Frequency	72 to 76	21 to 22
Curves With 18dB Gain Setting (Av=8)
THD + N vs Output Power	77 to 85	23 to 24
THD + N vs Frequency	86 to 88	24
Signal to Noise Ratio vs Power Supply Voltage	89 to 90	25
Noise Floor	91 to 92	25
PSRR vs Frequency	93 to 97	25 to 26

Note : All measurements made with Rin=20kΩ, Cb=1µF, and Cin=10µF unless otherwise specified.

8/32

TS419-TS421

Fig. 1: Open Loop Gain and Phase vs

Frequency
							180
	80				Vcc = 5V		160
					RL = 8Ω
			Gain
	60				Tamb = 25°C		140
							120
Gain (dB)	40						100	Phase (Deg)
		Phase					80
	20
							60
	0						40
	-20						20
							0
	-40						-20
	0.1	1	10	100	1000	10000
			Frequency (kHz)

Fig. 2: Open Loop Gain and Phase vs

Frequency
							180
	80				Vcc = 2V		160
					RL = 8Ω
			Gain
	60				Tamb = 25°C		140
							120
Gain (dB)	40						100	Phase (Deg)
		Phase					80
	20
							60
	0						40
	-20						20
							0
	-40						-20
	0.1	1	10	100	1000	10000
			Frequency (kHz)

Fig. 3: Open Loop Gain and Phase vs

Fig. 4: Open Loop Gain and Phase vs

Frequency								Frequency
						180								180
	80			Vcc = 5V		160			80			Vcc = 2V		160
				ZL	= 8Ω+400pF							ZL
		Gain								Gain			= 8Ω+400pF
	60			Tamb = 25°C		140			60			Tamb = 25°C		140
						120								120
(dB)Gain	40					100	(Deg)Phase	(dB)Gain	40					100	(Deg)Phase
		Phase				80				Phase				80
	20								20
						60								60
	0					40			0					40
	-20					20			-20					20
						0								0
	-40					-20			-40					-20
	0.1	1	10	100	1000	10000			0.1	1	10	100	1000	10000
			Frequency (kHz)								Frequency (kHz)

Fig. 5: Open Loop Gain and Phase vs

Frequency
							180
	80				Vcc = 5V		160
					RL = 16Ω
			Gain
	60				Tamb = 25°C		140
							120
Gain (dB)	40						100	Phase (Deg)
		Phase					80
	20
							60
	0						40
	-20						20
							0
	-40						-20
	0.1	1	10	100	1000	10000
			Frequency (kHz)

Fig. 6: Open Loop Gain and Phase vs

Frequency
							180
	80				Vcc = 2V		160
					RL = 16Ω
			Gain
	60				Tamb = 25°C		140
							120
Gain (dB)	40						100	Phase (Deg)
		Phase					80
	20
							60
	0						40
	-20						20
							0
	-40						-20
	0.1	1	10	100	1000	10000
			Frequency (kHz)
								9/32

TS419-TS421

Fig. 7: Open Loop Gain and Phase vs

Frequency
						180
	80			Vcc = 5V		160
				ZL
		Gain			= 16Ω+400pF
	60			Tamb = 25°C		140
						120
Gain (dB)	40					100	Phase (Deg)
		Phase				80
	20
						60
	0					40
	-20					20
						0
	-40					-20
	0.1	1	10	100	1000	10000
			Frequency (kHz)

Fig. 9: Open Loop Gain and Phase vs

Frequency
							180
	80				Vcc = 5V		160
					RL = 32Ω
			Gain
					Tamb = 25°C		140
	60
							120
Gain (dB)	40						100	Phase (Deg)
	20	Phase					80
							60
	0						40
	-20						20
							0
	-40						-20
	0.1	1	10	100	1000	10000
			Frequency (kHz)

Fig. 11: Open Loop Gain and Phase vs

Frequency
						180
	80			Vcc = 5V		160
				ZL
			Gain		= 32Ω+400pF
				Tamb = 25°C		140
	60
						120
Gain (dB)	40					100	Phase (Deg)
	20	Phase				80
						60
	0					40
	-20					20
						0
	-40					-20
	0.1	1	10	100	1000	10000
			Frequency (kHz)
10/32

Fig. 8: Open Loop Gain and Phase vs

Frequency
						180
	80			Vcc = 2V		160
				ZL
		Gain			= 16Ω+400pF
	60			Tamb = 25°C		140
						120
Gain (dB)	40					100	Phase (Deg)
		Phase				80
	20
						60
	0					40
	-20					20
						0
	-40					-20
	0.1	1	10	100	1000	10000
			Frequency (kHz)

Fig. 10: Open Loop Gain and Phase vs

Frequency
							180
	80				Vcc = 2V		160
					RL = 32Ω
			Gain
					Tamb = 25°C		140
	60
							120
Gain (dB)	40						100	Phase (Deg)
	20	Phase					80
							60
	0						40
	-20						20
							0
	-40						-20
	0.1	1	10	100	1000	10000
			Frequency (kHz)

Fig. 12: Open Loop Gain and Phase vs

Frequency
						180
	80			Vcc = 2V		160
				ZL
			Gain		= 32Ω+400pF
				Tamb = 25°C		140
	60
						120
Gain (dB)	40					100	Phase (Deg)
	20	Phase				80
						60
	0					40
	-20					20
						0
	-40					-20
	0.1	1	10	100	1000	10000
			Frequency (kHz)