Data Sheet

SSM2537

Rev. 0 | Page 3 of 16

SPECIFICATIONS

PVDD = 5.0 V, VDD = 1.8 V, fS = 128×, TA = 25°C, RL = 8 Ω + 33 µH, unless otherwise noted. When fS = 128×, PDM clock = 6.144 MHz;

when fS = 64×, PDM clock = 3.072 MHz.

Table 1.

Parameter

Symbol

Test Conditions/Comments

Min

Typ

Max

Unit

DEVICE CHARACTERISTICS

Output Power

P

O

f = 1 kHz, BW = 20 kHz

R

L = 4 Ω, THD = 1%, PVDD = 5.0 V

2.7

W

R

L = 8 Ω, THD = 1%, PVDD = 5.0 V

1.4

W

R

L = 4 Ω, THD = 1%, PVDD = 3.6 V

1.35

W

R

L = 8 Ω, THD = 1%, PVDD = 3.6 V

0.75

W

R

L = 4 Ω, THD = 1%, PVDD = 2.5 V

0.62

W

R

L = 8 Ω, THD = 1%, PVDD = 2.5 V

0.35

W

R

L = 4 Ω, THD = 10%, PVDD = 5.0 V

3.38

W

R

L = 8 Ω, THD = 10%, PVDD = 5.0 V

1.8

W

R

L = 4 Ω, THD = 10%, PVDD = 3.6 V

1.7

W

R

L = 8 Ω, THD = 10%, PVDD = 3.6 V

0.93

W

R

L = 4 Ω, THD = 10%, PVDD = 2.5 V

0.78

W

R

L = 8 Ω, THD = 10%, PVDD = 2.5 V

0.44

W

Total Harmonic Distortion Plus Noise

THD + N

f = 1 kHz

P

O = 100 mW into 8 Ω, PVDD = 3.6 V

0.005

%

P

O = 500 mW into 8 Ω, PVDD = 3.6 V

0.015

%

P

O = 1 W into 8 Ω, PVDD = 5.0 V

0.02

%

Efficiency

η

P

O = 2 W into 4 Ω, PVDD = 5.0 V

88

%

P

O = 1.4 W into 8 Ω, PVDD = 5.0 V

93

%

Average Switching Frequency

f

SW

No input

290

kHz

Closed-Loop Gain

Gain

−6 dBFS PDM input, BTL output, f = 1 kHz

Gain = 3.6 V

3.5

V

P

Gain = 5.0 V

4.78

V

P

Differential Output Offset Voltage

V

OOS

Gain = 3.6 V

0.5

mV

Low Power Mode Wake Time

t

WAKE

0.5

ms

Input Sampling Frequency

f

S

f

S = 64×

1.84

3.072

3.23

MHz

f

S = 128×

3.68

6.144

6.46

MHz

Propagation Delay

t

PD

f

S = 6.144 MHz, normal operation

35

µs

f

S = 6.144 MHz, low latency operation

15

µs

POWER SUPPLY

Supply Voltage Range

Amplifier Power Supply

PVDD

2.5

3.6

5.5

V

Digital Power Supply

VDD

1.65

1.8

1.95

V

Power Supply Rejection Ratio

PSRR

V

RIPPLE = 100 mV at 100 Hz

80

dB

V

RIPPLE = 100 mV at 1 kHz

80

dB

V

RIPPLE = 100 mV at 10 kHz

75

dB

Supply Current, H-Bridge

I

PVDD

Dither input, 8 Ω + 33 µH load

PVDD = 5.0 V, f

S = 64×

1.4

mA

PVDD = 5.0 V, f

S = 128×

1.4

mA

PVDD = 3.6 V, f

S = 64×

1.1

mA

PVDD = 3.6 V, f

S = 128×

1.2

mA

PVDD = 2.5 V, f

S = 64×

1.0

mA

PVDD = 2.5 V, f

S = 128×

1.1

mA

Standby Current

PVDD = 5.0 V

2.5

µA

Power-Down Current

100

nA