NATIONAL SEMICONDUCTOR TP3040V, TP3040N, TP3040AN Datasheet

TP3040, TP3040A PCM Monolithic Filter

TP3040, TP3040A PCM Monolithic Filter

September 1994

General Description

The TP3040/TP3040A filter is a monolithic circuit contain­ing both transmit and receive filters specifically designed for
PCM CODEC filtering applications in 8 kHz sampled sys­tems.

The filter is manufactured using microCMOS technology
and switched capacitor integrators are used to simulate
classical LC ladder filters which exhibit low component sen­sitivity.

TRANSMIT FILTER STAGE

The transmit filter is a fifth order elliptic low pass filter in
series with a fourth order Chebyshev high pass filter. It pro­vides a flat response in the passband and rejection of sig­nals below 200 Hz and above 3.4 kHz.

RECEIVE FILTER STAGE

The receive filter is a fifth order elliptic low pass filter de­signed to reconstruct the voice signal from the decoded/de­multiplexed signal which, as a result of the sampling pro­cess, is a stair-step signal having the inherent sin x/x fre­quency response. The receive filter approximates the func­tion required to compensate for the degraded frequency re­sponse and restore the flat passband response.

Block Diagram

Features

Y

Designed for D3/D4 and CCITT applications

Y

a

5V,b5V power supplies

Y

Low power consumption:

45 mW (0 dBm0 into 600X)
30 mW (power amps disabled)

Y

Power down mode: 0.5 mW

Y

20 dB gain adjust range

Y

No external anti-aliasing components

Y

Sin x/x correction in receive filter

Y

50/60 Hz rejection in transmit filter

Y

TTL and CMOS compatible logic

Y

All inputs protected against static discharge due to
handling

FIGURE 1

TL/H/6660– 1

C

1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.

TL/H/6660

Absolute Maximum Ratings

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.

Supply Voltages

g

7V

Power Dissipation 1 W/Package

Input Voltage

Voltage at Any Input

or Output V

DC Electrical Characteristics Unless otherwise noted, limits printed in BOLD characters are guaranteed for

ea

V
limits are assured by correlation with other production tests and/or product design and characterization. Typicals specified at
V
digital ground, GNDD. Analog voltages measured with respect to analog ground, GNDA.

CC

CC

5.0Vg5%, V

ea

5.0V, V

BB

BB

eb

5.0V, T

eb

5.0Vg5%; T

a

0.3V to V

CC

A

e

25§C. Clock frequency is 2.048 MHz. Digital interface voltages measured with respect to

A

g

7V

b

0.3V

BBV

e

0§Cto70§C by correlation with 100% electrical testing at T

Symbol Parameter Conditions Min Typ Max Units

POWER DISSIPATION

I

CC0

VCCStandby Current V

e

CC

CLK0 and PWRI
All other pins at GND (0V)
TP3040, TP3040A

I

BB0

VBBStandby Current V

e

CC

CLK0 and PWRI
All other pins at GND (0V)
TP3040, TP3040A

I

I

I

I

CC1

BB1

CC2

BB2

VCCOperating Current PWRIeVBB, Power Amp Inactive 3.0 4.0 mA

VBBOperating Current PWRIeVBB, Power Amp Inactive 3.0 4.0 mA

VCCOperating Current (Note 1) 4.6 6.4 mA

VBBOperating Current (Note 1) 4.6 6.4 mA

DIGITAL INTERFACE

I

I

I

V

V

V

V

V

INC

INP

IN0

IL

IH

IL0

II0

IH0

Input Current, CLK V

Input Current, PDN V

Input Current, CLK0 V

Input Low Voltage, CLK, PDN 0 0.8 V

Input High Voltage, CLK, PDN 2.2 V

Input Low Voltage, CLK0 V

Input Intermediate Voltage, CLK0

Input High Voltage, CLK0 V

BB

BB

BB

s

s

s

TRANSMIT INPUT OP AMP

IBxI Input Leakage Current, VFxI

RIxI Input Resistance, VFxIV

VOSxI Input Offset Voltage, VFxI

V

CM

Common-Mode Range, VFxI

CMRR Common-Mode Rejection Ratio

PSRR Power Supply Rejection of VCCor V

R

OL

R

L

C

L

VOxI Output Voltage Swing, GS

A

VOL

F

c

Open Loop Output Resistance, GS

Minimum Load Resistance, GS

x

Maximum Load Capacitance, GS

x

Open Loop Voltage Gain, GS

x

Open Loop Unity Gain Bandwidth, GS

b

3.2VsV

s

BB

b

2.5VsV

b

2.5VsV

BB

x

x

t

R

10k

L

t

R

10k 5,000 V/V

L

x

Output Short-Circuit Duration Continuous

Operating Temperature Range

Storage Temperature

Lead Temperature (Soldering, 10 seconds) 300§C

ESD Rating to be determined

5.25V, V

5.25V, V

V

IN

V

IN

V

IN

VFxIsV

eb

5.25V,

BB

eb

5.25V (Note 6)

eb

5.25V,

BB

eb

5.25V (Note 6)

s

V

CC

s

V

CC

s

b

V

0.5V

CC

s

a

3.2V

IN

CC

s

a

2.5V

IN

s

2.5V 60 dB

IN

b

b

100 mA

b

b

CC

b

100 100 nA

10 MX

b

b

50 100 mA

50 100 mA

10 10 mA

10

BB

0.8 0.8 V

b

0.5 V

20 20 mV

2.5 2.5 V

60 dB

1kX

10 kX

g

2.5 V

2 MHz

b

25§Ctoa125§C

b

65§Ctoa150§C

e

25§C. All other

A

b

0.1 mA

CC

a

V

0.5 V

BB

CC

100 pF

V

V

2

AC Electrical Characteristics

Unless otherwise specified, T
assumed to be 1.54 Vrms measured at the output of the transmit or receive filter. Limits printed in BOLD characters are
guaranteed for V
25§C. All other limits are assured by correlation with other production tests and/or product design and characterization. Typicals
specified at V

CC

ea

CC

ea

Symbol Parameter Conditions Min Typ Max Units

TRANSMIT FILTER (Transmit filter input op amp set to the non-inverting unity gain mode, with VFxIe1.09 Vrms unless
otherwise noted.)

RL

CL

RO

Minimum Load Resistance, VFxO

x

Load Capacitance, VFxO 100 pF

x

Output Resistance, VFxO13X

x

PSRR1 VCCPower Supply Rejection, VFxOfe1 kHz, VFxIae0 Vrms 30 dB

PSRR2 VBBPower Supply Rejection, VFxO Same as Above 35 dB

GA

GR

DA

DD

Absolute Gain fe1 kHz (TP3040A) 2.9 3.0 3.1 dB

x

Gain Relative to GA

x

Absolute Delay at 1 kHz 250 ms

x

Differential Envelope Delay from 60 ms

x

1 kHz to 2.6 kHz

DPx1 Single Frequency Distortion

Products

DPx2 Distortion at Maximum Signal 0.16 Vrms, 1 kHz Signal Applied to

Level VF

NCx1 Total C Message Noise at VFxO TP3040, TP3040A 2 5 dBrnc0

NCx2 Total C Message Noise at VFxO Gain Setting Op Amp at 20 dB,

GAxT Temperature Coefficient of 0.0004 dB/§C

1 kHz Gain

GAxS Supply Voltage Coefficient of V

1 kHz Gain V

CT

Crosstalk, Receive to Transmit Receive Filter Outpute2.2 Vrms

RX

20 log

VF

x

VFRO

O

GRxL Gaintracking Relative to GA

e

A

5.0Vg5%, V

5.0V, V

BB

x

25§C. All parameters are specified for a signal level of 0 dBm0 at 1 kHz. The 0 dBm0 level is

eb

eb

BB

5.0V, T

x

5.0Vg5%; T

e

25§C.

A

b

2.5VkV

b

3.2VkV

e

f

Below 50 Hz
50 Hz
60 Hz
200 Hz (TP3040A)
200 Hz (TP3040)
300 Hz to 3 kHz (TP3040A)
300 Hz to 3 kHz (TP3040)

3.3 kHz

3.4 kHz

4.0 kHz

4.6 kHz and Above

Non-Inverting (Note 3)
T

A

TP3040, TP3040A

CC

BB

VF
Measure VF

Output Levelea3 dBm0

a

2 dBm0 tob40 dBm0

b

40 dBm0 tob55 dBm0

e

0§Cto70§C by correlation with 100% electrical testing at T

A

k

2.5V 3 kX

OUT

k

3.2V 10 kX

OUT

A

1 kHz (TP3040) 2.875 3.0 3.125 dB

b

b

41

b

b

1.5 0 dB

b

1.5 0.05 dB

b

0.125 0.125 dB

b

0.15 0.15 dB

b

0.35 0.03 dB

b

0.70

Ia, Gaine20 dB, R

x

e

0§Cto70§C

e

5.0Vg5% 0.01 dB/V

eb

5.0Vg5%

Iae0 Vrms, fe0.2 kHz to 3.4 kHz

x

O

x

e

10k

L

b

0.1 0.1 dB

b

0.05 0.05 dB

b

0.1 0.1 dB

35

b

15

3 6 dBrnc0

35 dB

b

35 dB

b

30 dB

b

0.1 dB

b

14 dB

b

32 dB

b

48 dB

b

45 dB

b

70 dB

e

3