Datasheet

TS4871
4/28
ELECTRICAL CHARACTERISTICS
V
CC
= 2.6V, GND = 0V, T
amb
= 25°C (unless otherwise specified)
REMARKS
1. All measurements, except PSRR measurements, are made with a supply bypass capacitor Cs = 100µF.
2. External resistors are not needed for having better stability when supply @ Vcc down to 3V. By the way,
the quiescent current remains the same.
3. The standby response time is about 1µs.
Symbol Parameter Min. Typ. Max. Unit
I
CC
Supply Current
No input signal, no load
5.5 8 mA
I
STANDBY
Standby Current
1)
No input signal, Vstdby = Vcc, RL = 8
Ω
1. Standby mode is actived when Vstdby is tied to Vcc
10 1000 nA
Voo
Output Offset Voltage
No input signal, RL = 8
Ω
520mV
Po
Output Power
THD = 1% Max, f = 1kHz, RL = 8
Ω
260 mW
THD + N
Total Harmonic Distortion + Noise
Po = 200mW rms, Gv = 2, 20Hz < f < 20kHz, RL = 8
Ω
0.15 %
PSRR
Power Supply Rejection Ratio
2)
f = 217Hz, RL = 8
Ω,
RFeed = 22K
Ω,
Vripple = 200mV rms
2. Dynamic measurements - 20*log(rms(Vout)/rms(Vripple)). Vripple is the surimposed sinus signal to Vcc @ f = 217Hz
75 dB
Φ
M
Phase Margin at Unity Gain
R
L
= 8
Ω
, C
L
= 500pF
70 Degrees
GM
Gain Margin
R
L
= 8
Ω
, C
L
= 500pF
20 dB
GBP
Gain Bandwidth Product
R
L
= 8
Ω
2MHz
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 (fc = 1 / (2 x Pi x Rin x Cin))
Cin Input coupling capacitor which blocks the DC voltage at the amplifier input terminal
Rfeed Feed back resistor which sets the closed loop gain in conjunction with Rin
Cs Supply Bypass capacitor which provides power supply filtering
Cb Bypass pin capacitor which provides half supply filtering
Cfeed
Low pass filter capacitor allowing to cut the high frequency
(low pass filter cut-off frequency 1 / (2 x Pi x Rfeed x Cfeed))
Rstb Pull-up resistor which fixes the right supply level on the standby pin
Gv Closed loop gain in BTL configuration = 2 x (Rfeed / Rin)