SGM89000
Capless 2Vrms Line Driver
with Adjustable Gain
GENERAL DESCRIPTION
The SGM89000 is a 2Vrms pop/click-free stereo line
driver designed to allow the removal of the output
DC-blocking capacitors for reduced component count
and cost. The device is ideal for single supply
electronics where size and cost are critical design
parameters.
The SGM89000 is capable of driving 2Vrms into a
2.5kΩ load with 3.3V supply voltage. The device has
differential inputs and uses external gain setting
resistors that supports a gain range of ±1V/V to ±10V/V.
The use of external gain resistors also allows the
implementation of a 2nd-order low pass filter to
compliment
SGM89000
DAC's
has
and
build-in
SOC
converters.
control
The
for
shutdown
FEATURES
Capless Structure
Eliminates Pop/Clicks
Eliminates Output DC-Blocking Capacitors
Provides Flat Frequency Response from DC to
20kHz
Low Noise and THD
Typical SNR = 114dB
Typical V
N
= 5.5μVrms
Typical THD+N = 0.001% (f = 1kHz)
2Vrms Output Voltage into 2.5kΩ Load with 3.3V
Supply Voltage
Differential Input
-40℃ to +85℃ Operating Temperature Range
Available in the Green TSSOP-14 Package
pop/click-free on/off control.
Using the SGM89000 in audio products can reduce
component count compared to traditional methods of
generating a 2Vrms output. The SGM89000 doesn't
require a power supply greater than 3.3V to generate a
5.6V
PP
output, nor does the device require a split rail
power supply. The SGM89000 integrates a charge
pump to generate a negative supply rail that provides a
clean, pop/click-free ground-biased 2Vrms output.
The SGM89000 is available in Green TSSOP-14
package. It operates over an ambient temperature
range of -40℃ to +85℃.
APPLICATIONS
Set-Top Box
LCD TV
Blue-Ray DVD-Players
Home Theater in a Box
SG Micro Corp
www.sg-micro.com
FEBRUARY 2017 – REV. C. 1
SGM89000
PACKAGE/ORDERING INFORMATION
MODEL
SGM89000
PACKAGE
DESCRIPTION
TSSOP-14
SPECIFIED
TEMPERATURE
RANGE
-40℃ to +85℃
ORDERING
NUMBER
Capless 2Vrms Line Driver
with Adjustable Gain
PACKAGE
MARKING
SGM89000
YTS14
XXXXX
PACKING
OPTION
Tape and Reel, 3000
SGM89000YTS14G/TR
NOTE: XXXXX = Date Code and Vendor Code.
Green (RoHS & HSF): SG Micro Corp defines "Green" to mean Pb-Free (RoHS compatible) and free of halogen substances. If
you have additional comments or questions, please contact your SGMICRO representative directly.
Supply Voltage..................................................... -0.3V to 4V
Input Voltage.................................... V
SS
- 0.3V to V
DD
+ 0.3V
Minimum Load Impedance (R
L
) .....................................600Ω
EN to GND ...............................................-0.3V to V
DD
+ 0.3V
Junction Temperature .................................................+150℃
Storage Temperature Range......................... -65℃ to +150℃
Lead Temperature (Soldering, 10s) ............................+260℃
ESD Susceptibility
HBM ............................................................................. 6000V
MM ................................................................................. 300V
CDM ............................................................................ 1000V
ABSOLUTE MAXIMUM RATINGS
OVERSTRESS CAUTION
Stresses beyond those listed may cause permanent damage
to the device. Functional operation of the device at these or
any other conditions beyond those indicated in the operational
section of the specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
reliability.
ESD SENSITIVITY CAUTION
This integrated circuit can be damaged by ESD if you don’t
pay attention to ESD protection. SGMICRO recommends that
all integrated circuits be handled with appropriate precautions.
Failure to observe proper handling and installation procedures
can cause damage. ESD damage can range from subtle
performance degradation to complete device failure. Precision
integrated circuits may be more susceptible to damage
because very small parametric changes could cause the
device not to meet its published specifications.
Supply Voltage Range ...........................................3V to 3.6V
Operating Temperature Range ....................... -40℃ to +85℃
RECOMMENDED OPERATING CONDITIONS
DISCLAIMER
SG Micro Corp reserves the right to make any change in
circuit design, specification or other related things if necessary
without notice at any time.
TYPICAL OPERATION CIRCUIT
_
DAC
RIGHT
+
SGM89000
SOC
DAC
+
_
LEFT
SG Micro Corp
www.sg-micro.com
FEBRUARY 2017
2
SGM89000
PIN CONFIGURATION
(TOP VIEW)
Capless 2Vrms Line Driver
with Adjustable Gain
+INR
-INR
OUTR
SGND
EN
PVSS
CN
1
2
3
4
5
6
7
Charge Pump
External
Under
Voltage
Detector
14
13
12
11
10
9
8
+INL
-INL
OUTL
UVP
PGND
PVDD
CP
TSSOP-14
PIN DESCRIPTION
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
NAME
+INR
-INR
OUTR
SGND
EN
PVSS
CN
CP
PVDD
PGND
UVP
OUTL
-INL
+INL
FUNCTION
Right Channel OPAMP Positive Input.
Right Channel OPAMP Negative Input.
Right Channel OPAMP Output.
Signal Ground.
Enable Input. Active high.
Negative Supply Voltage Output.
Charge Pump Flying Capacitor Negative Terminal.
Charge Pump Flying Capacitor Positive Terminal.
Positive Supply.
Power Ground.
Under-Voltage Protection Input.
Left Channel OPAMP Output.
Left Channel OPAMP Negative Input.
Left Channel OPAMP Positive Input.
SG Micro Corp
www.sg-micro.com
FEBRUARY 2017
3
SGM89000
ELECTRICAL CHARACTERISTICS
(T
A
= +25℃, unless otherwise noted.)
PARAMETER
ELECTRICAL CHARACTERISTICS
DC Supply Voltage (V
DD
)
Output Offset Voltage (|V
OS
|)
Power Supply Rejection Ratio (PSRR)
High-Level Output Voltage (V
OH
)
Low-Level Output Voltage (V
OL
)
High-Level Input Current (EN) (|I
IH
|)
Low-Level Input Current (EN) (|I
IL
|)
Supply Current (I
DD
)
V
DD
= 3.3V
V
DD
= 3V to 3.6V
V
DD
= 3.3V, R
L
= 2.5kΩ
V
DD
= 3.3V, R
L
= 2.5kΩ
V
DD
= 3.3V, V
I
= V
DD
V
DD
= 3.3V, V
I
= 0V
V
DD
= 3.3V, No load, EN = V
DD
Shutdown mode, V
DD
= 3V to 3.6V
THD = 1%, V
DD
= 3.3V, f = 1kHz
V
O
= 2Vrms, f = 1kHz
V
O
= 2Vrms, f = 1kHz
V
DD
= 3.3V
CONDITIONS
Capless 2Vrms Line Driver
with Adjustable Gain
MIN
3
TYP
MAX
3.6
UNITS
V
mV
dB
V
1.2
97
3.18
5
-3.05
1
1
10.5
0.13
2.05
0.001
113
20
10
20
10
220
14.5
0.18
V
μA
μA
mA
OPERATING CHARACTERISTICS
(V
DD
= 3.3V, R
L
= 2.5kΩ, C
PUMP
= C
PVSS
= 1µF, C
IN
= 10µF, R
IN
= 10kΩ, R
FB
= 20kΩ.)
(1)
Output Voltage (Outputs in Phase) (V
O
)
Total Harmonic Distortion Plus Noise (THD+N)
Crosstalk
Output Current Limit (I
O
)
Input Resistor Range (R
IN
)
Feedback Resistor Range (R
FB
)
Slew Rate
Maximum Capacitive Load
Noise Output Voltage (V
N
)
Signal to Noise Ratio (SNR)
Unity Gain Bandwidth (G
BW
)
Open-Loop Voltage Gain (A
VO
)
Charge Pump Frequency (f
CP
)
External Under-Voltage Detection (V
UVP
)
External Under-Voltage Detection Hysteresis
Current (I
HYS
)
EN PIN
Input High Voltage (V
INH
)
Input Low Voltage (V
INL
)
EN
EN
1.2
0.6
V
V
330
1.05
A-weighted, BW = 20kHz
V
O
= 2Vrms, THD+N = 0.1%, BW = 20kHz,
A-weighted
Vrms
%
dB
mA
kΩ
kΩ
V/μs
pF
μVrms
dB
MHz
dB
560
1.25
kHz
V
μA
5.5
114
7.8
120
450
1.13
4.8
NOTE:
1. For C
PUMP
, C
PVSS
, C
IN
, R
IN
and etc, please refer to the TYPICAL APPLICATION CIRCUIT on page 7.
SG Micro Corp
www.sg-micro.com
FEBRUARY 2017
4
SGM89000
Capless 2Vrms Line Driver
with Adjustable Gain
TYPICAL PERFORMANCE CHARACTERISTICS
V
DD
= 3.3V, T
A
= +25℃, R
L
= 2.5kΩ,
C
PUMP
= C
PVSS
= 1µF, C
IN
= 10µF, R
IN
= 10kΩ,
R
FB
= 20kΩ,
unless otherwise noted.
THD+N vs. Output Voltage
10
THD+N vs. Output Voltage
10
V
DD
= 3.3V, R
L
= 600Ω,
f = 1kHz
V
DD
= 3.3V, R
L
= 2.5kΩ,
f = 1kHz
1
1
THD + N (%)
0.1
THD + N (%)
200m
500m
1
2
5
10
0.1
0.01
0.01
0.001
0.001
0.0001
100m
0.0001
100m
200m
500m
1
2
5
10
Output Voltage (Vrms)
Output Voltage (Vrms)
THD+N vs. Output Voltage
10
THD+N vs. Frequency
1
V
DD
= 3.3V, R
L
= 100kΩ,
f = 1kHz
V
DD
= 3.3V, R
L
= 2.5kΩ
1
0.1
THD + N (%)
0.1
THD + N (%)
0.01
0.01
Left_Cyan Right_Green
0.001
0.001
0.0001
100m
200m
500m
1
2
5
10
0.0001
20
50
100
200
500
1k
2k
5k
10k
20k
Output Voltage (Vrms)
Frequency (Hz)
FFT vs. Frequency
+0
-20
-40
-60
-80
-100
-120
-140
-160
-120
Crosstalk vs. Frequency
-20
V
DD
= 3.3V, R
L
= 100kΩ,
V
O
= 2mVrms
V
DD
= 3.3V, R
L
= 2.5kΩ
-40
Crosstalk (dB)
-60
FFT (dBr)
-80
-100
Left to Right_Cyan
Right to Left_Green
2k
4k
6k
8k
10k
12k
14k
16k 18k
20k
22k
24k
-140
20
50
100 200
500
1k
2k
5k
10k 20k
50k 100k
Frequency (Hz)
Frequency (Hz)
SG Micro Corp
www.sg-micro.com
FEBRUARY 2017
5
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