Texas Instruments TWL1110PBS, TWL1110GQE Datasheet

TWL1110

VOICE-BAND AUDIO PROCESSOR (VBAP)

SLWS103 – NOVEMBER 2000

1

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

 2.7 to 3.3-V Operation
 Designed for Analog and Digital Wireless

Handsets and Telecommunications
Applications

 Two Differential Microphone Inputs
 Differential Earphone Outputs and One

Single-Ended Earphone Output

 Earphone and Microphone Mute
 Programmable Transmit, Receive, and

Sidetone Paths With Extended Gain and
Attenuation Ranges

 Programmable for 15-Bit Linear Data or

8-Bit Companded (µ-law and A-law) Mode

 Supports PCM Clock Rates of 128 kHz and

2.048 MHz

 Pulse Density Modulated (PDM) Buzzer

Output

 On-Chip I

2

C Bus, Which Provides Simple,
Standard, Two-Wire Serial Interface With
Digital ICs

 Dual-Tone Multifrequency (DTMF) and

Single-Tone Generator Capable of Up to
8-kHz Tone With Three Selectable
Resolutions of 7.8125 Hz, 15.625 Hz, and

31.25 Hz

 2-Channel Auxiliary Multiplexer (MUX)

(Analog Switch)



 Capable of Driving 32 Ω Down to a 8-Ω

Speaker

 Programmable Power Down Modes
 Pin Compatible to TI’s TWL1102, TWL1103,

and TWL1109 Devices for TQFP only

 Available in a 32-Pin Thin Quad Flatpack

(TQFP) Package and MicroStar Junior 
BGA

description

The TWL1110 provides extended gain and attenuation flexibility for transmit, receive, and sidetone paths. A
differential earphone output is capable of driving speaker loads as low as 8 Ω for use in speaker phone
applications. The single tone function on the TWL1110 generates a single tone output of up to 8 kHz. The
resolution of the DTMF tone is also selectable to 7.8125 Hz, 15.625 Hz, or 31.250 Hz through the interface
control. The analog switch provides more control capabilities for voice-band audio processor (VBAP).

The VBAP is an analog-digital interface for voice band signals designed with a combination of coders and
decoders (codecs) and filters. It is a low-power device with companding options and programming features, and
it meets the requirements for communication systems, including the cellular phone. The device operates in
either the 15-bit linear or 8-bit companded (µ-law or A-Law) mode, which is selectable through the I

2

C interface.

A coder, an analog-to-digital converter or ADC, digitizes the analog voice signal, and a decoder, an
digital-to-analog converter or DAC, analogs the digital-voice signal. VBAP provides a companding option to
overcome the bandwidth limitations of telephone networks without degradation in sound quality. The human
auditory system is a logarithmic system in which high amplitude signals require less resolution than low
amplitude signals. Therefore, an 8-bit code word with nonuniform quantization (µ-law or A-law) has the same
quality as 13-bit linear coding. VBAP provides better digital code words by generating a 15-bit linear coding
option.

This device contains circuits to protect its inputs and outputs against damage due to high static voltages or electrostatic fields. These
circuits have been qualified to protect this device against electrostatic discharges (ESD) of up to 2 kV according to MIL-STD-883C,
Method 3015; however, it is advised that precautions be taken to avoid application of any voltage higher than maximum-rated
voltages to these high-impedance circuits. During storage or handling, the device leads should be shorted together or the device
should be placed in conductive foam. In a circuit, unused inputs should always be connected to an appropriated logic voltage level,
preferably either VCC or ground. Specific guidelines for handling devices of this type are contained in the publication

Guidelines for

Handling Electrostatic-Discharge-Sensitive (ESDS) Devices and Assemblies

available from Texas Instruments.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

†

These options are available on some devices. Please see the table of comparison for the last two generations of VBAPs.

Copyright  2000, Texas Instruments Incorporated

MicroStar Junior and VBAP are trademarks of Texas Instruments.
All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.

TWL1110
VOICE-BAND AUDIO PROCESSOR (VBAP)

SLWS103 – NOVEMBER 2000

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POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

description (continued)

The human voice is effective from a frequency range of 300 Hz to 3300 Hz in telephony applications. In order
to eliminate unwanted signals, the VBAP design has two types of filters that operate in both the transmit and
receive path. A low-pass filter attenuates the signals over 4 kHz. A selectable high-pass filter cleans up the
signals under 100 Hz. This reduces noise that may have coupled in from 50/60-Hz power cables. The high-pass
filter is bypassed by selecting the corresponding register bit.

VBAP has many programming features that are controlled using a 2-wire standard serial I

2

C interface. This
allows the device to interface with many digital ICs such as a DSP or a microprocessor. The device has seven
registers: power control, mode control, transmit PGA, receive PGA, high DTMF , low DTMF, and auxiliary mode
control. Some of the programmable features that can be controlled by I2C interface include:

 Transmit amplifier gain
 Receive amplifier gain
 Sidetone gain
 Volume control
 Earphone control
 PLL power control
 Microphone selection
 Transmit channel high-pass filter control
 Receive channel high-pass filter control
 Companding options and selection control
 PCM loopback
 DTMF control
 Pulse density modulated control

The VBAP is also capable of generating its own internal clocks from a 2.048-MHz master clock input.

TWL1110

VOICE-BAND AUDIO PROCESSOR (VBAP)

SLWS103 – NOVEMBER 2000

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POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

PBS PACKAGE

(TOP VIEW)

31

30

29

28

27

9

10

PCMO
PCMI
DV

SS

DV

DD

SCL
SDA
MUXOUT2
MUXOUT1

PLLV

DD

EARV

SS

EAR1ON

EARV

DD

EAR1OP

EARV

SS

EAR2O

AV

DD

32

26

11

12

13

14

15

MBIAS

MIC1P

MIC1N

MIC2P

MUXIN

16

25

1234567 8

24 23 22 21 20 19 18 17

MIC2N

REXT

AV

SS

MCLK

PLLV

SS

V

SS

RESET

PWRUPSEL

BUZZCON

PCMSYN

PCMCLK

TWL1110
VOICE-BAND AUDIO PROCESSOR (VBAP)

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functional block diagram

PCMIN

PCMSYN

PCMCLK

MIC1P

MIC1N

MIC2P

MIC2N

MIC

Amplifier

1

g =

23.5 dB

MIC

Amplifier

2

g = 6

or

18 dB

Analog

Modulator

TX Filter

and PGA

g = –10 dB

to

0 dB

PCM

Interface

Sidetone

g = –24 db

to

–12 dB

RX Vol

Control

g = –18 dB

to

0 dB

RX Filter

and PGA

g = – 6 dB

to

+6 dB

Digital

Modulator

and Filter

Ear

Amp1

Ear

Amp2

DTMF

Generator

Control Bus

REF PLL

Buzzer

Control

Power and RESET

SCLK

SDATA

MBIAS

REXT

MCLK

RESET

SS

EARV

DD

EARV

SS

PLLV

DD

PLLV

SS

DV

DD

DV

SS

AV

DD

AV

SS

V

PWRUPSEL

PCMOUT

EAR1OP

EAR1ON

EAR2O

BUZZCON

DTMF

GAIN

DTMF

Voice

0 dBor6 dB

MUX

–12 to

12 dB

in 6dB

Steps

I C

MUX

IN

OUT

OUT

I/F

2

TWL1110

VOICE-BAND AUDIO PROCESSOR (VBAP)

SLWS103 – NOVEMBER 2000

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POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

functional description

power on/reset

The power for the various digital and analog circuits is separated to improve the noise performance of the
device. An external reset must be applied to the active low/RESET terminal to guarantee reset upon power on
and to bring the device to an operational state. After the initial power-on sequence the device can be functionally
powered up and powered down by writing to the power control register through the I

2

C interface. The device
has a pin-selectable power up in the default mode option. The hardwired pin-selectable PWRUPSEL function
allows the VBAP to power up in the default mode and to be used without a microcontroller.

reference

A precision band gap reference voltage is generated internally and supplies all required voltage references to
operate the transmit and receive channels. The reference system also supplies bias voltage for use with an
electret microphone at terminal MBIAS. An external precision resistor is required for reference current setting
at terminal REXT.

I2C control interface

The I

2

C interface is a two-wire bidirectional serial interface. The I2C interface controls the VBAP by writing data

to seven control registers:

 Power control
 Mode control
 Transmit PGA and sidetone control
 Receive PGA gain and volume control
 DTMF routing
 Tone selection control
 Auxiliary control

There are two power up modes which may be selected at the PWRUPSEL terminal: (1) The PWRUPSEL state
(VDD at terminal 20) causes the device to power up in the default mode when power is applied. Without an I2C
interface or controlling device, the programmable functions are fixed at the default gain levels, and functions
such as the sidetone and DTMF are not accessible. (2) The PWRUPSEL state (ground at terminal 20) causes
the device to go to a power down state when power is applied. In this mode an I

2

C interface is required to power

up the device.

phase-locked loop (PLL)

The phase-lock loop generates the internal clock frequency required for digital filters and modulators by phase
locking to 2.048 MHz master clock input.

PCM interface

The PCM interface transmits and receives data at the PCMO and PCMI terminals respectively. The data is
transmitted or received at the PCMCLK speed once every PCMSYN cycle. The PCMCLK can be tied directly
to the 128-kHz or 2.048-MHz master clock (MCLK). The PCMSYN can be driven by an external source or
derived from the master clock and used as an interrupt to the host controller.

microphone amplifiers

The microphone input is a switchable interface for two differential microphone inputs. The first stage is a
low-noise differential amplifier that provides a gain of 23.5 dB. The second-stage amplifier has a selectable gain
of 6 or 18 dB.

TWL1110
VOICE-BAND AUDIO PROCESSOR (VBAP)

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functional description (continued)

analog modulator

The transmit channel modulator is a third-order sigma-delta design.

transmit filter and PGA

The transmit filter is a digital filter designed to meet CCITT G.714 requirements. The device operates either in
the 15-bit linear or 8-bit companded µ-law or in the A-law mode, which is selectable through the I

2

C interface.

The transmit PGA defaults to 0 dB.

sidetone

A portion of the transmitted audio is attenuated and fed back to the receive channel through the sidetone path.
The sidetone path defaults to the mute condition. The default gain of -12 dB is set in the sidetone control register.
The sidetone path can be enabled by writing to the power control register.

receive volume control

The receive volume control block acts as an attenuator with a range of –18 dB to 0 dB in 2-dB steps for control
of the receive channel volume. The receive volume control gain defaults to 0 dB.

receive filter and PGA

The receive filter is a digital filter that meets CCITT G.714 requirements with a high-pass filter that is selectable
through the I2C interface. The device operates either in the 15-bit linear or the 8-bit µ-law or the A-law
companded mode, which is selectable through the I2C interface. The gain defaults to –4 dB, representing a
3-dBm level for a 32-Ω load impedance and the corresponding digital full scale PCMI code.

digital modulator and filter

The second-order digital modulator and filter convert the received digital PCM data to the analog output required
by the earphone interface.

earphone amplifiers

The analog signal can be routed to either of two earphone amplifiers, one with differential output (EAR1ON and
EAR1OP) and one with single-ended output (EAR2O). Clicks and pops are suppressed for EAR1 differential
output only.

tone generator

The tone generator provides generation of standard DTMF tones which are output to (1) the buzzer driver, as
a PDM signal, (2) the receive path DAC for outputting through the earphone, or (3) as PCMO data. The integer
value is loaded into one of two 8-bit registers, the high-tone register (04), or the low-tone register (05) (see the

Register Map Addressing

section). The tone output is 2 dB higher when applied to the high tone register (04).
The high DTMF tones must be applied to the high-tone register, and the low DTMF tones to the low-tone register .
The tone signals can be generated with 3 different resolutions at ∆F= 7.8125 Hz, 15.625 Hz, and 31.250 Hz.
The resolution option can be selected by setting the register (06).

analog mux

The analog switch can be used to source an analog signal to two different loads. The output can be reselected
by setting the auxiliary register (06).

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VOICE-BAND AUDIO PROCESSOR (VBAP)

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functional description (continued)

DTMF gain MUX

The DTMF gain MUX selects the signal path and applies the appropriate gain setting. Therefore the device is
either in tone mode or in voice mode. When set in the voice mode, the gain is controlled by the auxiliary register
and is set to 0 dB or 6 dB. When set in the tone mode, the gain is from –12 dB to 12 dB in 6-dB steps which
is set by the volume control register. The gain setting is controlled by the RXPGA register. This will not create
any control contention since the device is working in one mode at a time.

Terminal Functions

TERMINAL

†

NO.

I/O DESCRIPTION

NAME

µBGA TQFP

I/O

DESCRIPTION

AV

DD

A1 32 I Analog positive power supply

AV

SS

J1 8 I Analog negative power supply (use for ground connection)
BUZZCON F9 19 O Buzzer output, a pulse-density modulated signal to apply to external buzzer driver
DV

DD

J6 13 I Digital positive power supply
DV

SS

J7 14 I Digital negative power supply
EAR1ON A6 27 O Earphone 1 amplifier output (–)
EAR1OP A4 29 O Earphone 1 amplifier output (+)
EAR2O A2 31 O Earphone 2 amplifier output
EARV

DD

A5 28 I Analog positive power supply for the earphone amplifiers
EARV

SS

A3, A7 30, 26 I Analog negative power supply for the earphone amplifiers
MBIAS B1 1 O Microphone bias supply output, no decoupling capacitors
MCLK C9 22 I Master system clock input (2.048 MHz, digital)
MIC1P C1 2 I MIC1 input (+)
MIC1N D1 3 I MIC1 input (–)
MIC2P E1 4 I MIC2 input (+)
MIC2N F1 5 I MIC2 input (–)
MUXIN H1 7 I Analog MUX input
MUXOUT1 J2 9 I Analog MUX output
MUXOUT2 J3 10 I Analog MUX output
PCMI J8 15 I Receive PCM input
PCMO J9 16 O Transmit PCM output
PCMSYN G9 18 I PCM frame sync
PCMCLK H9 17 I PCM data clock
PLLV

SS

A9 24 I PLL negative power supply

PLLV

DD

A8 25 I PLL digital power supply

PWRUPSEL E9 20 I Selects the power-up default mode
REXT G1 6 I/O Internal reference current setting terminal (use precision 100-kΩ resistor and no filtering

capacitors)
RESET D9 21 I Active low reset
SCL J5 12 I I2C-bus serial clock (this input is used to synchronize the data transfer from and to the

VBAP)
SDA J4 11 I/O I2C-bus serial address/data input/output. This is a bidirectional terminal used to transfer

register control addresses and data into and out of the codec. It is an open

-drain terminal

and therefore requires a pullup resistor to VDD (typical 10 kΩ for 100 kHz).
V

SS

B9 23 I Ground return for bandgap internal reference (use for ground connection)

†

All MicroStar Junior BGA pins that are not mentioned have no internal connection.

TWL1110
VOICE-BAND AUDIO PROCESSOR (VBAP)

SLWS103 – NOVEMBER 2000

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absolute maximum ratings over operating free-air temperature range (unless otherwise noted)

†

Supply voltage range –0.5 V to 3.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output voltage range –0.5 V to 3.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range –0.5 V to 3.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Continuous total power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free air temperature range (industrial temperature) –40°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, testing –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm from case for 10 seconds 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

†

Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

DISSIPATION RATING TABLE

PACKAGE

TA ≤ 25°C

POWER RATING

DERATING FACTOR

ABOVE TA = 25°C

TA = 85°C

POWER RATING

COMMENTS

TQFP 702 mW 7.2 mW/°C 270 mW low dissipation printed

circuit board (PCB)
MicroStar Junior BGA 660 mW 164 mW/°C 220 mW low dissipation PCB
MicroStar Junior BGA 2.75 W 36 mW/°C 917 mW high dissipation PCB

recommended operating conditions (see Notes 1 and 2)

MIN NOM MAX UNIT

Supply voltage, AVDD, DVDD, PLLVDD, EARV

DD

2.7 3.3 V

High-level input voltage (V

IHMIN

) 0.7xV

DD

V

Low-level input voltage (V

ILMAX

) 0.3xV

DD

V

Load impedance between EAR1OP and EAR1ON-R

L

8 to 32 Ω

Load impedance for EAR2OP-R

L

32 Ω

Operating free-air temperature, T

A

–40 85 C

NOTES: 1. To avoid possible damage and resulting reliability problems to these CMOS devices, follow the power on initialization paragraph,

described in the

Principles of Operation

.

2. Voltages are with respect to AVSS, DV

SS,

PLLVSS,

and

EARV

SS.

electrical characteristics over recommended ranges of supply voltage and free-air temperature (unless
otherwise noted)

supply current

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Operating, EAR1 selected, MicBias disabled 4.5 6 mA
Operating, EAR2 selected, MicBias disabled 4.5 6 mA

I Supply current from V

DD

Power down room temperature, VDD = 3.0 V, Reg 6 bit 7 =
1, MClk not present (see Note 3)

2 10 µA

Power down room temperature, VDD = 3.0 V, , Reg 6 bit 7 =
0, MClk not present (see Note 3)

10 30 µA

t

on(i)

Power-up time from power down 5 10 ms

3. V

IHMIN

= V

DD, VILMAX

= V

SS.

TWL1110

VOICE-BAND AUDIO PROCESSOR (VBAP)

SLWS103 – NOVEMBER 2000

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electrical characteristics over recommended ranges of supply voltage and free-air temperature (unless
otherwise noted) (continued)

digital interface

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

V

OH

High-level output voltage PCMO (BuzzCon) IOH = –3.2 mA, VDD = 3 V DVDD –0.25 V

V

OL

Low-level output voltage PCMO IOL = 3.2 mA, VDD = 3 V 0.25 V

I

IH

High-level input current, any digital input VI = V

DD

10 µA

I

IL

Low-level input current, any digital input VI = V

SS

10 µA

C

I

Input capacitance 10 pF

C

O

Output capacitance 20 pF

R

L

Load impedance (BuzzCon) 5 kΩ

0

5

10

15

20

25

30

35

40

45

–50 0 50 100

0

5

10

15

20

25

30

–50 0 50 100

SUPPLY CURRENT

vs

FREE AIR TEMPERATURE

(Detector OFF)

SUPPLY CURRENT

vs

FREE AIR TEMPERATURE

(Detector ON)

DD

I Supply Current – –Aµ

DD

I Supply Current – –Aµ

TA – Free-Air Temperature – °CT

A

– Free-Air Temperature – °C

VDD = 3.3 V

VDD = 3.0 V

VDD = 3.3 V

VDD = 3.0 V

VDD = 2.7 V

VDD = 2.7 V

microphone interface

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

V

IO

Input offset voltage at MIC1N, MIC2N See Note 4 –5 5 mV

I

IB

Input bias current at MIC1N, MIC2N –300 300 nA

C

i

Input capacitance at MIC1N, MIC2N 5 pF

V

n

Microphone input referred noise, psophometrically weighted,
(C-message weighted is similar)

MIC Amp 1 gain = 23.5 dB
MIC Amp 2 gain = 0 dB

3 4.7 µV

rms

IOmax Output source current – MBIAS 1 1.2 mA
V

(mbias)

Microphone bias supply voltage (see Note 5) 2.3 2.5 2.65 V
MICMUTE –80 dB

Input impedance Fully differential 35 60 100 kΩ

NOTES: 4. Measured while MIC1P and MIC1N are connected together. Less than 0.5-mV offset results in 0 value code on PCMOUT.

5. Not a JEDEC symbol.

TWL1110
VOICE-BAND AUDIO PROCESSOR (VBAP)

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electrical characteristics over recommended ranges of supply voltage and free-air temperature (unless
otherwise noted) (continued)

speaker interface

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

VDD = 2.7 V , fully differential, 8-Ω load,
3-dBm0 output, volume control = –3 dB,
RXPGA = –4 dB level

161 200

Earphone AMP1 output power (see Note 6)

VDD = 2.7 V , fully differential, 16-Ω load,
3-dBm0 output, volume control = –3 dB,
RXPGA = –2 dB level

128 160

mW

VDD = 2.7 V , fully differential, 32-Ω load,
3-dBm0 output, volume control = –3 dB,
RXPGA = –1 dB level

81 100

Earphone AMP2 output power (see Note 6)

VDD = 2.7 V, single-ended, 32-Ω load,
3-dBm0 output

10 12.5 mW

V

OO

Output offset voltage at EAR1 Fully differential ±5 ±30 mV

3-dBm0 input, 8-Ω load 141 178

Maximum output current for EAR1 (rms)

3-dBm0 input, 16-Ω load

90 112

IOmax

Maximum out ut current for EAR1 (rms)

3-dBm0 input, 32-Ω load 50 63

mA

Maximum output current for EAR2 (rms) 3-dBm0 input 17.7 22.1
EARMUTE –80 dB

NOTE 6: Maximum power is with a load impedance of –25%.

transmit gain and dynamic range, companded mode (µ-law or A-law) or linear mode selected, transmit slope
filter bypassed (see Notes 7 and 8)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Transmit reference-signal level (0 dB) Differential 87.5 mV

pp

Differential, normal mode 124

Overload-signal level (3 dBm0)

Differential, extended mode 31.5

mV

pp

Absolute gain error 0 dBm0 input signal, VDD ±10% –1 1 dB

MIC1N, MIC1P to PCMO at 3 dBm0 to –30 dBm0 –0.5 0.5

Gain error with input level relative to gain at
–

MIC1N, MIC1P to PCMO at –31 dBm0 to –45 dBm0 –1 1

dB

–10 dBm0

MIC1N, MIC1P to PCMO

MIC1N, MIC1P to PCMO at –46 dBm0 to –55 dBm0 –1.2 1.2

dB

NOTES: 7. Unless otherwise noted, the analog input is 0 dB, 1020-Hz sine wave, where 0 dB is defined as the zero-reference point of the channel

under test.

8. The reference signal level, which is input to the transmit channel, is defined as a value 3 dB below the full-scale value of 88-mV

rms

.

transmit gain and dynamic range, companded mode (µ-law or A-law) or linear mode selected, transmit slope
filter enabled (see Notes 7 and 8)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Transmit reference-signal level (0 dB) Differential 87.5 mV

pp

Differential, normal mode 124 mV

pp

Overload-signal level (3 dBm0)

Differential, extended mode 31.5 mV

pp

Absolute gain error 0 dBm0 input signal, VDD ±10% –1 1 dB

MIC1N, MIC1P to PCMO at 3 dBm0 to –30 dBm0 –0.5 0.5

Gain error with input level relative to gain at
–

MIC1N, MIC1P to PCMO at –31 dBm0 to –45 dBm0 –1 1

dB

–10 dBm0

MIC1N, MIC1P to PCMO

MIC1N, MIC1P to PCMO at –46 dBm0 to –55 dBm0 –1.2 1.2

dB

NOTES: 7. Unless otherwise noted, the analog input is 0 dB, 1020-Hz sine wave, where 0 dB is defined as the zero-reference point of the

channel under test.

8 The reference signal level, which is input to the transmit channel, is defined as a value 3 dB below the full-scale value of 88-mV

rms

.

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VOICE-BAND AUDIO PROCESSOR (VBAP)

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electrical characteristics over recommended ranges of supply voltage and free-air temperature (unless
otherwise noted) (continued)

transmit filter transfer, companded mode (µ-law or A-law) or linear mode selected, transmit slope filter
bypassed (MCLK = 2.048 MHz)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

f

MIC1

or f

MIC2

<100 Hz –0.5 0.5

f

MIC1

or f

MIC2

= 200 Hz –0.5 0.5

f

MIC1

or f

MIC2

= 300 Hz to 3 kHz –0.5 0.5

Gain relative to input signal gain at 1020 Hz, internal high-pass

f

MIC1

or f

MIC2

= 3.4 kHz –1.5 0

dB

filt

er disable

d

f

MIC1

or f

MIC2

= 4 kHz –14

dB

f

MIC1

or f

MIC2

= 4.6 kHz –35

f

MIC1

or f

MIC2

= 8 k Hz –47

Gain relative to input signal gain at 1020 Hz, internal high-pass

f

MIC1

or f

MIC2

<100 Hz –15

Gain relative to in ut signal gain at 1020 Hz, internal high ass

filter enabled

f

MIC1

or f

MIC2

= 200 Hz –5

dB

transmit filter transfer, companded mode (µ-law or A-law) or linear mode selected, transmit slope filter
selected, transmit high-pass filter enabled (MCLK = 2.048 MHz) (see Note 9)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

f

MIC1

or f

MIC2

=100 Hz –27 dB

f

MIC1

or f

MIC2

= 200 Hz –8 dB

f

MIC1

or f

MIC2

= 250 Hz –4 dB

f

MIC1

or f

MIC2

= 300 Hz –1.80 dB

f

MIC1

or f

MIC2

= 400 Hz –1.50 dB

f

MIC1

or f

MIC2

= 500 Hz –1.30 dB

f

MIC1

or f

MIC2

= 600 Hz –1.1 dB

f

MIC1

or f

MIC2

= 700 Hz –0.8 dB

f

MIC1

or f

MIC2

= 800 Hz –0.57 dB

f

MIC1

or f

MIC2

= 900 Hz –0.25 dB

f

MIC1

or f

MIC2

= 1000 Hz 0 dB

Gain relative to input signal gain at 1.02 kHz, with slope filter selected

f

MIC1

or f

MIC2

= 1500 Hz 1.8 dB

f

MIC1

or f

MIC2

= 2000 Hz 4.0 dB

f

MIC1

or f

MIC2

= 2500 Hz 6.5 dB

f

MIC1

or f

MIC2

= 3000 Hz 7.6 dB

f

MIC1

or f

MIC2

= 3100 Hz 7.7 dB

f

MIC1

or f

MIC2

= 3300 Hz 8.0 dB

f

MIC1

or f

MIC2

= 3500 Hz 6.48 dB

f

MIC1

or f

MIC2

= 4000 Hz –13 dB

f

MIC1

or f

MIC2

= 4500 Hz –35 dB

f

MIC1

or f

MIC2

= 5000 Hz –45 dB

f

MIC1

or f

MIC2

= 8000 Hz –50 dB

NOTE 9: The pass-band tolerance is ±0.25 dB from 300 Hz to 3500 Hz.

TWL1110
VOICE-BAND AUDIO PROCESSOR (VBAP)

SLWS103 – NOVEMBER 2000

12

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

electrical characteristics over recommended ranges of supply voltage and free-air temperature (unless
otherwise noted) (continued)

–30

–25

–20

–15

–10

–5

0

5

100 1000

Relative Gain – dB

–100

–80

–60

–40

–20

0

20

100 1000 10000

Relative Gain – dB

RELATIVE GAIN

vs

FREQUENCY

RELATIVE GAIN

vs

FREQUENCY

f – Frequency – Hz f – Frequency – Hz

Both Filters
Disabled

High Pass

Filter and

Slope Filter

Selected

High Pass

Filter Selected

and Slope Filter

Disabled

Both Filters
Disabled

High Pass
Filter Selected
and Slope Filter
Disabled

High Pass
Filter and
Slope Filter
Selected

Figure 1. Transmit Gain Response With Respect to Gain of 1 kHz Tone

transmit idle channel noise and distortion, companded mode (µ-law or A-law) selected, slope filter bypassed

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

Transmit idle channel noise, psophometrically
weighted

TXPGA gain= 0 dB, MIC Amp 1 gain = 23.5 dB,
MIC Amp 2 gain = 6 dB

–83.5 –78 dBm0

p

MIC1N, MIC1P to PCMO at 3 dBm0 27
MIC1N, MIC1P to PCMO at 0 dBm0 30
MIC1N, MIC1P to PCMO at –5 dBm0 33

Transmit signal-to-distortion ratio with

MIC1N, MIC1P to PCMO at –10 dBm0 36

Transmit signal to distortion ratio with

1020-Hz sine-wave input

MIC1N, MIC1P to PCMO at –20 dBm0 35

dBm0

MIC1N, MIC1P to PCMO at – 30 dBm0 26
MIC1N, MIC1P to PCMO at – 40 dBm0 24
MIC1N, MIC1P to PCMO at – 45 dBm0 19

Intermodulation distortion, 2-tone CCITT method,

CCITT G.712 (7.1), R2 49

Intermodulation distortion, 2 tone CCITT method

,

composite power level, –13 dBm0

CCITT G.712 (7.2), R2 51

dB