STMicroelectronics TS925 Technical data

TS925

Rail-to-Rail High Output Current Quad Operational Amplifiers With Standby Mode and Adjustable Phantom Ground

■Rail-to-rail input and output

■Low noise: 9nV/√Hz

■Low distortion

■High output current: 80mA (able to drive 32Ω loads)

■High-speed: 4MHz, 1.3V/ s

■Operating from 2.7V to 12V

■Low input offset voltage: 900µV max. (TS925A)

■Adjustable phantom ground (VCC/2)

■Standby mode

■ESD internal protection: 2kV

■Latch-up immunity

Description

The TS925 is a rail-to-rail quad BiCMOS operational amplifier optimized and fully specified for 3V and 5V operation.

High output current allows low load impedances to be driven. An internal low impedance phantom ground eliminates the need for an external reference voltage or biasing arrangement.

The TS925 exhibits very low noise, low distortion and high output current making this device an excellent choice for high quality, low voltage or battery operated audio/telecom systems.

The device is stable for capacitive loads up to 500pF. When the STANDBY mode is enabled, the total consumption drops to 6µA (VCC = 3V).

N

DIP16

(Plastic Package)

D

SO-16

(Plastic Micropackage)

P

TSSOP16

(Thin Shrink Small Outline Package)

Pin connections (top view)

	Output 1	1					16	Output 4
	Inverting	2					15	Inverting
	Input 1
			-	+	+	-		Input 4
	Non-inverting							Non-inverting
		3					14
	Input 1
								Input 4
	VCC+	4					13	VCC-
	Non-inverting	5					12	Non-inverting
	Input 2							Input 3
	Inverting	6	-	+	+	-	11	Inverting
	Input 2							Input 3
	Output 2	7					10	Output 3
	Phantom ground	8					9	Stdby

Applications

■Headphone amplifier

■Soundcard amplifier, piezoelectric speaker

■MPEG boards, multimedia systems...

■Cordless telephones and portable communication equipment

■Line driver, buffer

■Instrumentation with low noise as key factor

	Rev 2
November 2005	1/17
	www.st.com

					TS925
	Order Codes
	Part Number	Temperature Range	Package	Packing	Marking
	TS925IN		DIP16	DIP16	TS925IN
	TS925ID/IDT		SO-16	SO-16	925I
	TS925IPT	-40°C to +125°C	TSSOP16	TSSOP16
	TS925AIN		DIP16	DIP16	TS925AIN
	TS925AID		SO-16	SO-16	925AI
	TS925AIPT		TSSOP16	TSSOP16

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TS925

Absolute Maximum Ratings

1 Absolute Maximum Ratings

	Table 1.	Key parameters and their absolute maximum ratings
	Symbol	Parameter	Condition	Value	Unit
	VCC	Supply voltage (1)		14	V
	Vid	Differential Input Voltage (2)		±1	V
	Vi	Input Voltage		VDD-0.3 to VCC+0.3	V
	Tj	Maximum Junction Temperature		150	°C
		Thermal Resistance Junction to	SO-16	95
	Rthja		TSSOP16	95	°C/W
		Ambient
			DIP16	63
		Thermal Resistance Junction to	SO-16	30
	Rthjc		TSSOP16	25	°C/W
		Case
			DIP16	33
			HBM	2	kV
			Human Body Model(3)
	ESD	Electro-Static Discharge	MM	200	V
			Machine Model(4)
			CDM	1	kV
			Charged Device Model
		Output Short Circuit Duration		see note(5)
		Latch-up Immunity		200	mA
		Soldering Temperature	10sec,	260	°C
			Pb-free package

1.All voltage values, except differential voltage are with respect to network ground terminal.

2.Differential voltages are the non-inverting input terminal with respect to the inverting input terminal. If Vid > ±1V, the maximum input current must not exceed ±1mA. In this case (Vid > ±1V) an input serie resistor must be added to limit input current.

3.Human body model, 100pF discharged through a 1.5kΩ resistor into pin of device.

4.Machine model ESD, a 200pF cap is charged to the specified voltage, then discharged directly into the IC with no external series resistor (internal resistor < 5Ω), into pin to pin of device.

5.There is no short-circuit protection inside the device: short-circuits from the output to Vcc can cause excessive heating. The maximum output current is approximately 80mA, independent of the magnitude of Vcc. Destructive dissipation can result from simultaneous short-circuits on all amplifiers.

Table 2.	Operating conditions
Symbol	Parameter	Value	Unit
VCC	Supply Voltage	2.7 to 12	V
Vicm	Common Mode Input Voltage Range	VDD -0.2 to VCC +0.2	V
Toper	Operating Free Air Temperature Range	-40 to +125	°C

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Electrical Characteristics

TS925

2 Electrical Characteristics

Table 3. Electrical characteristics for VCC = 3V, VDD = 0V, Vicm = VCC/2, RL connected to VCC/2, Tamb = 25°C (unless otherwise specified)

Symbol	Parameter	Conditions	Min.	Typ.	Max.	Unit
Vio	Input Offset Voltage	at Tamb = +25°C
		TS925			3
		TS925A			0.9	mV
		at Tmin. ≤ Tamb ≤ Tmax:
		TS925			5
					1.8
		TS925A
DVio	Input Offset Voltage Drift			2		µV/°C
Iio	Input Offset Current	Vout = 1.5V		1	30	nA
Iib	Input Bias Current	Vout = 2.5V		15	100	nA
VOH	High Level Output Voltage	RL = 10kΩ	2.90
		RL = 600Ω	2.87			V
		RL = 32Ω		2.63
VOL	Low Level Output Voltage	RL = 10kΩ			50
		RL = 600Ω		180	100	mV
		RL = 32Ω
Avd	Large Signal Voltage Gain	Vout = 2Vpk-pk
		RL = 10kΩ		200		V/mV
		RL = 600Ω		35
		RL = 32Ω		16
GBP	Gain Bandwidth Product	RL = 600Ω		4		MHz
CMR	Common Mode Rejection Ratio		60	80		dB
SVR	Supply Voltage Rejection Ratio	Vcc = 2.7 to 3.3V	60	85		dB
Io	Output Short-Circuit Current		50	80		mA
SR	Slew Rate		0.7	1.3		V/µs
Pm	Phase Margin at Unit Gain	RL = 600Ω, CL =100pF		68		Degrees
GM	Gain Margin	RL = 600Ω, CL =100pF		12		dB
en	Equivalent Input Noise Voltage	f = 1kHz		9		nV
						-----------
						Hz
THD	Total Harmonic Distortion	Vout = 2Vpk-pk,
		f = 1kHz, Av = 1,		0.01		%
		RL = 600Ω
Cs	Channel Separation			120		dB

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TS925

Electrical Characteristics

Table 4.

Global circuit

Symbol

Parameter

Conditions

Min.

Typ

Max.

Unit

ICC

Total Supply Current

No load, Vout = Vcc/2

5

7

mA

Istby

Total Supply Current in STANDBY

Pin 9 connected to Vcc-

6

µA

Venstby

Pin 9 Voltage to enable the

at Tamb = +25°C

0.3

V

STANDBY mode (1)

at T

≤ T

amb

≤ T

0.4

min

max

Vdistby

Pin 9 Voltage to disable the

at Tamb = +25°C

1.1

V

STANDBY mode(1)

at Tmin ≤ Tamb ≤ Tmax

1

1. The STANDBY mode is currently enabled when Pin 9 is GROUNDED and disabled when Pin 9 is left OPEN.

Table 5.	Phantom ground
Symbol	Parameter	Conditions	Min.	Typ	Max.	Unit
Vpg	Phantom Ground Output Voltage	No Output Current	Vcc/2	Vcc/2	Vcc/2	V
			-5%		+5%
Ipgsc	Phantom Ground Output Short		12	18		mA
	Circuit Current - Sourced
Zpg	Phantom Ground Impedance	DC to 20kHz		3		Ω
Enpg	Phantom Ground Output Voltage	f = 1kHz
	Noise	Cdec = 100pF		200		nV
						-----------
		Cdec = 1nF		40		Hz
		Cdec = 10nF(1)		17
Ipgsk	Phantom Ground Output Short		12	18		mA
	Circuit Current - Sinked
1. Cdec is the decoupling capacitor on Pin9.

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Electrical Characteristics

TS925

Table 6. Electrical characteristics for VCC = 5V, VDD = 0V, Vicm = VCC/2, RL connected to VCC/2, Tamb = 25°C (unless otherwise specified)

Symbol	Parameter		Conditions	Min.	Typ.	Max.	Unit
Vio	Input Offset Voltage	at Tamb = +25°C:
		TS925				3
		TS925A				0.9	mV
		at Tmin. ≤ Tamb ≤ Tmax:
		TS925				5
		TS925A				1.8
DVio	Input Offset Voltage Drift				2		µV/°C
Iio	Input Offset Current	Vout	= 2.5V		1	30	nA
Iib	Input Bias Current	Vout	= 2.5V		15	100	nA
VOH	High Level Output Voltage	RL= 10kΩ		4.90
		RL = 600Ω		4.85			V
		RL = 32Ω			4.4
VOL	Low Level Output Voltage	RL= 10kΩ				50
		RL = 600Ω				120	mV
		RL = 32Ω			300
Avd	Large Signal Voltage Gain	Vout = 2Vpk-pk
		RL= 10k			200		V/mV
		RL = 600Ω			40
		RL = 32Ω			17
GBP	Gain Bandwidth Product	RL = 600Ω			4		MHz
CMR	Common Mode Rejection Ratio			60	80		dB
SVR	Supply Voltage Rejection Ratio	Vcc = 3 to 5V		60	85		dB
Io	Output Short-Circuit Current			50	80		mA
SR	Slew Rate			0.7	1.3		V/µs
Pm	Phase Margin at Unit Gain	RL = 600Ω, CL =100pF			68		Degrees
GM	Gain Margin	RL = 600Ω, CL =100pF			12		dB
en	Equivalent Input Noise Voltage	f = 1kHz			9		nV
							-----------
							Hz
THD	Total Harmonic Distortion	Vout = 2Vpk-pk, f = 1kHz,			0.01		%
		Av = 1, RL = 600Ω
Cs	Channel Separation				120		dB

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