TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
D
Single 3-V Operation
D
Low Power Consumption:
Operating Mode ... 20 mW Typ
– Standby Mode ... 5 mW Typ
– Power-Down Mode ... 2 mW Typ
D
Combined A/D, D/A, and Filters
D
Extended Variable-Frequency Operation
– Sample Rates up to 16 kHz
– Passband up to 7.2 kHz
D
Electret Microphone Bias Reference
Voltage Available
D
Drive a Piezo Speaker Directly
D
Compatible With All Digital Signal
Processors (DSPs)
D
Selectable Between 8-Bit Companded and
13-Bit (Dynamic Range) Linear Conversion:
– TLV320AC40 . . . µ-Law and Linear
Modes
– TLV320AC41 ... A-Law and Linear
Modes
D
Programmable Volume Control in Linear
Mode
D
300-Hz to 3.6-kHz Passband with Specified
Master Clock
D
Designed for Standard 1.152-MHz Master
Clock in DECT Standard for Hand-Held
Battery-Powered Telephones
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
PDN
EARA
EARB
EARGS
VCC
MICMUTE
DCLKR
DIN
FSR
EARMUTE
MICBIAS
MICGS
MICIN
VMID
GND
LINSEL
TSX/DCLKX
DOUT
FSX
CLK
DW OR N PACKAGE
(TOP VIEW)
14 15
VMID
NC
AGND
NC
NC
NC
NC
NC
NC
DGND
LINSEL
NC
36
35
34
33
32
31
30
29
28
27
26
25
16
1
2
3
4
5
6
7
8
9
10
11
12
NC
NC
NC
AVCC
NC
NC
NC
NC
DVCC
NC
MICMUTE
NC
17 18 19 20
PT PACKAGE
(TOP VIEW)
MICGS
MICIN
NC
NC
47 46 45 44 4348 42
NC
NC
EARGS
EARB
EARA
PDN
TSX/DCLKX
NC
NC
DIN
EARMUTE
NC
CLK
FSX
DOUT
40 39 3841
21 22 23 24
37
13
NC
MICBIAS
NC
DCLKR
FSR
NC – No internal connection
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
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.
VBAP is a trademark of Texas Instruments Incorporated.
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.
Copyright 1997, Texas Instruments Incorporated
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
2POST OFFICE BOX 655303 DALLAS, TEXAS 75265
description
The TLV320AC40 and TLV320AC41 voice-band audio processor (VBAP) integrated circuits perform the
transmit encoding (A/D conversion) and receive decoding (D/A conversion) together with transmit and receive
filtering for voice-band communications systems. Cellular telephone systems are targeted in particular;
however, these integrated circuits can function in other systems including digital audio, telecommunications,
and data acquisition.
These devices are pin-selectable for either of two modes — companded and linear — providing data in two
formats. In the companded mode, data is transmitted and received in 8-bit words. In the linear mode, 13 bits
of data, and either three bits of gain-setting control data, or three 0 bits of padding (to create a16-bit word), are
sent and received.
The transmit section is designed to interface directly with an electret microphone element. The microphone input
signal (MICIN) is buffered and amplified with provision for setting the amplifier gain to accommodate a range
of signal input levels. The amplified signal is passed through antialiasing and bandpass filters. The filtered signal
is then applied to the input of a compressing analog-to-digital converter (COADC) when companded mode is
selected. Otherwise, the analog-to-digital converter performs a linear conversion. The resulting data is then
clocked out of DOUT as a serial data stream.
The receive section converts a frame of serial data on DIN to analog through an expanding digital-to-analog
converter (EXDAC) when the companded mode is selected; otherwise, a linear conversion is performed. The
analog signal then passes through switched capacitor filters, which provide out-of-band rejection, (sin x)/x
correction functions, and smoothing. The filtered signal is sent to the earphone amplifier. The earphone amplifier
has a differential output with adjustable gain and is designed to minimize static power dissipation.
A single on-chip high-precision band-gap circuit generates all voltage references, eliminating the need for
external reference voltages. An internal reference voltage, VMID, equal to VCC/2 is used to develop the midlevel
virtual ground for all the amplifier circuits and the microphone bias circuit. Another reference voltage, MICBIAS,
can supply bias current for the microphone.
The TLV320AC4xC devices are characterized for operation from 0°C to 70°C. The TLV320AC4xI devices are
characterized for operation from –40°C to 85°C.
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
3
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
functional block diagram
12
13
8DIN
FSR
7
14
15
LINSEL
1
PDN
16
GND
5
VCC
10
4
3
2
EARMUTE
EARGS
EARB
EARA Earphone
Amplifier
288 kHz
A/D
Converter
Voltage
Reference
Band-Gap
Voltage
Reference
8 kHz
288 kHz Clock
Generator
Autozero
DCLKR
CLK
TSX/DCLKX
FSX
DOUT
Output
Logic
ADC
MICGS
20
17
19
18
6
VMID
MICBIAS
VMID VMID
Generator
MICIN
MICMUTE Input
Buffer
Receive
Buffer Receive
Filter DAC Input
Logic
288 kHz 8 kHz
9
15
11
Transmit
Third-Order
Antialias
Transmit
Sixth-Order
Low Pass
Transmit
First-Order
High Pass
D/A
Converter
Voltage
Reference
Clock
Control
NOTE A: Terminal numbers shown are for the DW and N packages.
LINSEL
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
4POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Terminal Functions
TERMINAL
NAME
NO. I/O DESCRIPTION
NAME
DW, N PT
AGND 34 Ground return for all internal analog circuits
AVCC 4 3-V supply voltage for all internal analog circuits
CLK 11 19 IClock input. In the fixed-data-rate mode, CLK is the master clock input as well as the transmit and
receive data clock input . In the variable-data-rate mode, CLK is the master clock input only (digital).
DCLKR 7 14 I Selection of fixed- or variable-data-rate operation. When DCLKR is connected to VCC, the device
operates in the fixed-data-rate mode. When DCLKR is not connected to VCC, the device operates in
the variable-data-rate mode and DCLKR becomes the receive data clock (digital).
DGND 27 Ground return for all internal digital circuits
DIN 8 15 I Receive data input. Input data is clocked in on consecutive negative transitions of the receive data
clock, which is CLK for a fixed data rate and DCLKR for a variable data rate (digital).
DOUT 13 21 OTransmit data output. Transmit data is clocked out on consecutive positive transitions of the transmit
data clock, which is CLK for a fixed data rate and DCLKX for a variable data rate (digital).
DVCC 9 3-V supply voltage for all internal digital circuits
EARA 2 44 O Earphone output. EARA forms a differential drive when used with the EARB signal (analog).
EARB 3 45 O Earphone output. EARB forms a differential drive when used with the EARA signal (analog).
EARGS 4 46 I Earphone gain set input of feedback signal for the earphone output. The ratio of an external potential
divider network connected across EARA and EARB adjusts the power amplifier gain. Maximum gain
occurs when EARGS is connected to EARB. Minimum gain occurs when EARGS is connected to
EARA. Earphone frequency response correction is performed using an RC approach (analog).
EARMUTE 10 17 IEarphone output mute control signal. When EARMUTE is low , the output amplifier is disabled and no
audio is sent to the earphone (digital).
FSR 9 16 I Frame-synchronization clock input for the receive channel. In the variable-data-rate mode, this signal
must remain high for the duration of the time slot. The receive channel enters the standby condition
when FSR is TTL-low for five frames or longer. The device enters a production test-mode condition
when either FSR or FSX is held high for five frames or longer (digital).
FSX 12 20 IFrame synchronization clock input for the transmit channel. FSX operates independently of FSR, but
also in an analogous manner to FSR. The transmit channel enters the standby condition when FSX is
low for five frames or longer . The device enters a production test-mode condition when either FSX or
FSR is held high for five frames or longer (digital).
GND 16 Ground return for all internal circuits
LINSEL 15 26 ILinear selection input. When low , LINSEL selects linear coding/decoding. When high, LINSEL selects
companded coding/decoding. Companding code on the ’AC40 is µ-law, and companding code on the
’AC41 is A-law (digital).
MICBIAS 20 42 OMicrophone bias. MICBIAS voltage for the electret microphone is equal to VMID.
MICGS 19 41 OOutput of the internal microphone amplifier. MICGS is used as the feedback to set the microphone
amplifier gain. If sidetone is required, it is accomplished by connecting a series network between
MICGS and EARGS (analog).
MICIN 18 40 IMicrophone input. Electret microphone input to the internal microphone amplifier (analog)
MICMUTE 611 IMicrophone input mute control signal. When MICMUTE is active (low), zero code is transmitted (dig.).
PDN 1 43 I Power-down input. When PDN is low , the device powers down to reduce power consumption (digital).
TSX/DCLKX 14 22 I/O Transmit time slot strobe (active-low output) or data clock (input) for the transmit channel. In the
fixed-data-rate mode, TSX/DCLKX is an open-drain output that pulls to ground and is used as an enable
signal for a 3-state buffer. In the variable-data-rate mode, DCLKX becomes the transmit data clock input
(digital).
VCC 5 3-V supply voltage for all internal circuits
VMID 17 36 O VCC/2 bias voltage reference. A pair of external, low-leakage, high-frequency capacitors
(1 µF and 470 pF) should be connected between VMID and ground for filtering.
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
5
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC (see Note 1) 0.3 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range at DOUT, VO 0.3 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range at DIN, VI 0.3 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range: C suffix 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I suffix 40°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) 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 af fect device reliability.
NOTE 1: Voltage value is with respect to GND.
DISSIPATION RATING TABLE
PACKAGE TA 25°C
POWER RATING DERATING FACTOR
ABOVE TA = 25°CTA = 70°C
POWER RATING TA = 85°C
POWER RATING
DW 1025 mW 8.2 mW/°C656 mW 533 mW
N1150 mW 9.2 mW/°C 736 mW 598 mW
PT 1075 mW 7.1 mW/°C756 mW 649 mW
recommended operating conditions (see Note 2)
MIN MAX UNIT
Supply voltage, VCC (see Note 3) 2.7 3.3 V
High-level input voltage, VIH 2.2 V
Low-level input voltage, VIL 0.8 V
Load resistance between EARA and EARB, RL (see Note 4) 600
Load capacitance between EARA and EARB, CL (see Note 4) 50 nF
O
p
erating free air tem
p
erature TA
TLV320AC40C, TL V320AC41C 0 70 °
C
Operating
free
-
air
temperat
u
re
,
T
ATLV320AC40I, TL V320AC41I –40 85
°C
NOTES: 2. To avoid possible damage to these CMOS devices and resulting reliability problems, the power-up sequence detailed in the system
reliability features paragraph should be followed.
3. Voltages at analog inputs, outputs, and VCC are with respect to GND.
4. RL and CL should not be applied simultaneously.
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
6POST OFFICE BOX 655303 DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of supply voltage and free-air temperature
(unless otherwise noted)
supply current, fDCLKR or fDCLKX = 1.152 MHz, outputs not loaded, VCC = 3 V, TA = 25°C
PARAMETER TEST CONDITIONS MIN MAX UNIT
Operating PDN is high with CLK signal present 7.5
Power down PDN is low for 500 µs 0.75
ICC Supply current from VCC Standby – both PDN is high with FSX and FSR held low 2mA
Standby – one PDN is high with either FSX or FSR pulsing
with the other held low 4.5
digital interface
PARAMETER TEST CONDITIONS MIN TYPMAX UNIT
VOH High-level output voltage
DOUT
IOH = –3.2 mA, VCC = 3 V 2.4 2.8 V
VOL Low-level output voltage
DOUT
IOL = 3.2 mA, VCC = 3 V 0.2 0.4 V
IIH High-level input current, any digital input VI = 2.2 V to VCC 10 µA
IIL Low-level input current, any digital input VI = 0 to 0.8 V 10 µA
CiInput capacitance 5 pF
CoOutput capacitance 5 pF
All typical values are at VCC = 3 V, TA = 25°C.
microphone interface
PARAMETER TEST CONDITIONS MIN TYPMAX UNIT
VIO Input offset voltage at MICIN VI = 0 to 3 V ±5 mV
IIB Input bias current at MICIN ±200 nA
B1Unity-gain bandwidth, open loop at MICIN1.5 MHz
CiInput capacitance at MICIN 5 pF
AVLarge-signal voltage amplification at MICGS 10000 V/V
IOmax
Maximum out
p
ut current
VMID 3 µA
I
O
ma
x
Ma
x
im
u
m
o
u
tp
u
t
c
u
rrent
MICBIAS (source only) 1 mA
All typical values are at VCC = 3 V, TA = 25°C.
The frequency of the first pole is 100 Hz.
speaker interface
PARAMETER TEST CONDITIONS MIN TYPMAX UNIT
VO(PP) AC output voltage 3§Vpp
VOO Output offset voltage at EARA, EARB (single-ended) Relative to GND 80 mVpk
II(lkg) Input leakage current at EARGS VI = 0.5 V to (VCC – 0.5) V ±200 nA
IOmax Maximum output current RL = 600 ±2.5 mA
roOutput resistance at EARA, EARB 1
Gain change EARMUTE low, max level
when muted –60 dB
All typical values are at VCC = 3 V, TA = 25°C.
§2.5 Vpp when VCC is 2.7 V.
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
7
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
transmit gain and dynamic range, companded mode (µ-law or A-law) or linear mode selected, VCC = 3 V,
TA = 25°C (unless otherwise noted) (see Notes 5 and 6)
PARAMETER TEST CONDITIONS MIN MAX UNIT
Companded mode selected, µ-law (’AC40) 0.614
T ransmit reference-signal level (0 dB) (see Note 7) Companded mode selected, A-law (’AC41) 0.616 Vrms
Linear mode selected (’AC40 and ’AC41) 0.626
Companded mode selected, µ-law (’AC40) 2.5
Overload-signal level (MICIN at unity gain) Companded mode selected, A-law (’AC41) 2.5 Vpp
Linear mode selected (’AC40 and ’AC41) 2.5
Absolute gain error 0-dB input signal ±1 dB
MICIN to DOUT at 3 dBm0 to –40 dBm0 ±0.5
Gain error with input level relative to gain at –10 dBm0 MICIN to DOUT at –41 dBm0 to –50 dBm0 ±1.5 dB
MICIN to DOUT at –51 dBm0 to –55 dBm0 ±2
Gain variation VCC ±10%, TA = 0°C to 70°C±0.5 dB
NOTES: 5. 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.
6. The input amplifier is set for inverting unity gain.
7. The reference-signal level, which is input to the transmit channel, is defined as a value 3 dB below the full-scale value of 2 V.
transmit filter transfer, companded mode (µ-law or A-law) or linear mode selected, over recommended
ranges of supply voltage and free-air temperature, CLK = 1.152 MHz, FSX = 8 kHz (see Note 6)
PARAMETER TEST CONDITIONS MIN MAX UNIT
fMICIN = 50 Hz –10 0
fMICIN = 200 Hz –2.8 0
Input amplifier set for unit
y
g
ain
,
fMICIN = 300 Hz to 3 kHz ±0.25
Gain relative to input signal gain at 1.02 kHz
In ut
am lifier
set
for
unity
gain,
noninverting maximum gain output
i l MICIN i dB
fMICIN = 3.3 kHz 0.55 0.2 dB
signal at MICIN is 0 dB fMICIN = 3.4 kHz –1 0.1
fMICIN = 4 kHz –14
fMICIN 4.6 kHz –32
NOTE 6. The input amplifier is set for inverting unity gain.
transmit idle channel noise and distortion, companded mode with µ-law or A-law selected, over
recommended ranges of supply voltage and operating free-air temperature (see Note 8)
PARAMETER TEST CONDITIONS MIN MAX UNIT
T ransmit noise, psophometrically weighted MICIN connected to MICGS through a 10-k resistor –72 dBm0p
T ransmit noise, C-message weighted MICIN connected to MICGS through a 10-k resistor 10 dBrnC0
MICIN to DOUT at 0 dBm0 to –24 dBm0 36
MICIN to DOUT at –25 dBm0 to –30 dBm0 34
T ransmit signal-to-distortion ratio with sine-wave input MICIN to DOUT at –31 dBm0 to –38 dBm0 30 dB
MICIN to DOUT at –39 dBm0 to –40 dBm0 24
MICIN to DOUT at –41 dBm0 to –45 dBm0 20
Intermodulation distortion, 2-tone CCITT method, CCITT G.712 (7.1), R2 49
dB
composite power level –13 dBm0 CCITT G.712 (7.2), R3 51
dB
NOTE 8: Transmit noise, linear mode: 200 µV rms is equivalent to –74 dB (referenced to device 0-dB level).
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
8POST OFFICE BOX 655303 DALLAS, TEXAS 75265
transmit idle channel noise and distortion, linear mode selected, over recommended ranges of supply
voltage and operating free-air temperature (see Notes 6 and 8)
PARAMETER TEST CONDITIONS MIN MAX UNIT
T ransmit noise MICIN connected to MICGS through a 10-k resistor 200 µVrms
MICIN to DOUT at 0 dBm0 to –10 dBm0 46
MICIN to DOUT at –11 dBm0 to –12 dBm0 44
Transmit signal to distortion ratio with sine wave in
p
ut
MICIN to DOUT at –13 dBm0 to –18 dBm0 40
Transmit
signal
-
to
-
distortion
ratio
w
ith
sine
-w
a
v
e
inp
u
t
MICIN to DOUT at –19 dBm0 to –24 dBm0 35
MICIN to DOUT at –25 dBm0 to –40 dBm0 20
MICIN to DOUT at –41 dBm0 to –45 dBm0 18
NOTES: 6. The input amplifier is set for inverting unity gain.
8. T ransmit noise, linear mode: 200 µVrms is equivalent to –74 dB (referenced to device 0-dB level).
receive gain and dynamic range, companded mode (µ-law or A-law) or linear mode selected, VCC = 3 V,
TA = 25°C (unless otherwise noted) (see Notes 9 and 10)
PARAMETER TEST CONDITIONS MIN MAX UNIT
Companded mode selected, µ-law (’AC40) 0.736
Receive reference-signal level (0 dB) (see Note 11) Companded mode selected, A-law (’AC41) 0.739 Vrms
Linear mode selected (’AC40 and ’AC41) 0.751
Companded mode selected, µ-law (’AC40) 3
Overload-signal level Companded mode selected, A-law (’AC41) 3Vpp
Linear mode selected (’AC40 and ’AC41) 3
Absolute gain error 0-dB input signal ±1 dB
DIN to EARA and EARB at 3 dBm0 to –38 dBm0 ±0.5
Gain error with output level relative to gain at –10 dBm0 DIN to EARA and EARB at –39 dBm0 to –50 dBm0 ±1.5 dB
DIN to EARA and EARB at –51 dBm0 to –55 dBm0 ±2
Gain variation VCC ±10%, TA = 0°C to 70°C±0.5 dB
NOTES: 9. Receive output is measured differentially in the maximum gain configuration. To set the output amplifier for maximum gain, EARGS
is connected to EARB and the output is taken between EARA and EARB. All output levels are (sin x)/x corrected.
10. Unless otherwise noted, the digital input is a word stream generated by passing a 0-dB sine wave at 1020 Hz through an ideal
encoder, where 0 dB is defined as the zero reference.
11. This reference-signal level is measured at the speaker output of the receive channel with the gain of the output speaker amplifier
set to unity.
receive filter transfer, companded mode (µ-law or A-law) or linear mode selected, over recommended ranges
of supply voltage and operating free-air temperature, FSR = 8 kHz (see Note 9)
PARAMETER TEST CONDITIONS MIN MAX UNIT
fDIN = < 200 Hz 0.25
fDIN = 200 Hz 0.5 0.25
fDIN = 300 Hz to 3 kHz ±0.25
Gain relative to gain at 1.02 kHz DIN = 0 dBm0 fDIN = 3.3 kHz 0.55 0.2 dB
fDIN = 3.4 kHz –1 0.1
fDIN = 4 kHz –14
fDIN = > 4.6 kHz –30
NOTE 9. Receive output is measured differentially in the maximum gain configuration. To set the output amplifier for maximum gain, EARGS is
connected to EARB and the output is taken between EARA and EARB. All output levels are (sin x)/x corrected.
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
9
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
receive idle channel noise and distortion, companded mode with µ-law or A-law selected, over recommended
ranges of supply voltage and operating free-air temperature (see Note 9)
PARAMETER TEST CONDITIONS MIN MAX UNIT
Receive noise, psophometrically weighted DIN = 11010101 (A-law) –72 dBm0p
Receive noise, C-message weighted DIN = 11111111 (µ-law) 8 dBrnC0
DIN to EARA and EARB at 0 dBm0 to –18 dBm0 36
DIN to EARA and EARB at –19 dBm0 to –24 dBm0 34
Receive signal-to-distortion ratio with sine-wave input DIN to EARA and EARB at –25 dBm0 to –30 dBm0 30 dB
DIN to EARA and EARB at –31 dBm0 to –38 dBm0 23
DIN to EARA and EARB at –39 dBm0 to –45 dBm0 17
NOTE 9. Receive output is measured differentially in the maximum gain configuration. To set the output amplifier for maximum gain, EARGS is
connected to EARB and the output is taken between EARA and EARB. All output levels are (sin x)/x corrected.
receive idle channel noise and distortion, linear mode selected, over recommended ranges of supply voltage
and operating free-air temperature (see Notes 9 and 12)
PARAMETER TEST CONDITIONS MIN MAX UNIT
Receive noise DIN = 00000000 200 µVrms
DIN to EARA and EARB at 0 dBm0 to –12 dBm0 46
DIN to EARA and EARB at –13 dBm0 to –18 dBm0 38
Receive signal-to-distortion ratio with sine-wave input DIN to EARA and EARB at –19 dBm0 to –24 dBm0 32 dB
DIN to EARA and EARB at –25 dBm0 to –40 dBm0 18
DIN to EARA and EARB at –41 dBm0 to –45 dBm0 15
Intermodulation, 2-tone CCITT distortion method, CCITT G.712 (7.1), R2 50
dB
composite power level –13 dBm0 CCITT G.712 (7.2), R3 54
dB
NOTES: 9. Receive output is measured differentially in the maximum gain configuration. To set the output amplifier for maximum gain, EARGS
is connected to EARB and the output is taken between EARA and EARB. All output levels are (sin x)/x corrected.
12. Receive noise, linear mode: 200 µVrms is equivalent to –71 dB (referenced to device 0-dB level).
power supply rejection and crosstalk attenuation over recommended ranges of supply voltage and
operating free-air temperature
PARAMETER TEST CONDITIONS MIN TYPMAX UNIT
Supply voltage rejection, transmit channel Idle channel, supply signal = 100 mVrms,
f = 0 to 30 kHz (measured at DOUT) –30 dB
Supply voltage rejection, receive channel
Idle channel, supply signal = 100 mV rms,
EARGS connected to EARB,
f = 0 to 30 kHz (measured differentially
between EARA and EARB)
–30 dB
Crosstalk attenuation, transmit-to-receive (differential)
MICIN = 0 dB, f = 1.02 kHz,
unity transmit gain,
EARGS connected to EARB, measured
differentially between EARA and EARB
50 dB
Crosstalk attenuation, receive-to-transmit DIN = 0 dBm0, f = 1.02 kHz,
unity transmit gain, measured at DOUT 50 dB
All typical values are at VCC = 3 V, TA = 25°C.
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
10 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
timing requirements
clock timing requirements over recommended ranges of supply voltage and operating free-air temperature
(unless otherwise noted) (see Figure 1 through Figure 4)
MIN NOMMAX UNIT
ttT ransition time, CLK and DCLKX/DCLKR 10 ns
Duty cycle, CLK 45% 50% 55%
Duty cycle, DCLKX/DCLKR 45% 50% 55%
All nominal values are at VCC = 3 V, TA = 25°C.
transmit timing requirements over recommended ranges of supply voltage and operating free-air
temperature, fixed-data-rate mode (see Figure 2)
MIN MAX UNIT
tsu(FSX) Setup time, FSX high before CLK20 468 ns
th(FSX) Hold time, FSX high after CLK20 468 ns
receive timing requirements over recommended ranges of supply voltage and operating free-air
temperature, fixed-data-rate mode (see Figure 1)
MIN MAX UNIT
tsu(FSR) Setup time, FSR high before CLK20 468 ns
th(FSR) Hold time, FSR high after CLK20 468 ns
tsu(DIN) Setup time, DIN high or low before CLK20 ns
th(DIN) Hold time, DIN high or low after CLK20 ns
transmit timing requirements over recommended ranges of supply voltage and operating free-air
temperature, variable-data-rate mode (see Figure 4)
MIN MAX UNIT
tsu(FSX) Setup time, FSX high before DCLKX40 tc(DCLKX)–40 ns
th(FSX) Hold time, FSX high after DCLKX35 tc(DCLKX)–35 ns
receive timing requirements over recommended ranges of supply voltage and operating free-air
temperature, variable-data-rate mode (see Figure 3)
MIN MAX UNIT
tsu(FSR) Setup time, FSR high before DCLKR40 ns
th(FSR) Hold time, FSR high after DCLKR35 tc(DCLKR)–35 ns
tsu(DIN) Setup time, DIN high or low before DCLKR30 ns
th(DIN) Hold time, DIN high or low after DCLKR30 ns
switching characteristics
propagation delay times over recommended ranges of operating conditions, fixed-data-rate mode,
CL = 0 to 10 pF (see Figure 2)
PARAMETER TEST CONDITIONS MIN MAX UNIT
tpd1 From CLK bit 1 high to DOUT bit 1 valid 35 ns
tpd2 From CLK high to DOUT valid, bits 2 to n 35 ns
tpd3 From CLK bit n low to DOUT bit n Hi-Z 30 ns
tpd4 From CLK bit 1 high to TSX active (low) Rpullup = 1.24 kW 40 ns
tpd5 From CLK bit n low to TSX inactive (high) Rpullup = 1.24 k30 ns
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
11
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
propagation delay times over recommended ranges of operating conditions, variable-data-rate mode
(see Figure 4)
PARAMETER TEST CONDITIONS MIN MAX UNIT
tpd6 FSX high to DOUT bit 1 valid CL = 0 to 10 pF 30 ns
tpd7 DCLKX high to DOUT valid, bits 2 to n CL = 0 to 10 pF 40 ns
tpd8 FSX low to DOUT bit n Hi-Z 20 ns
PARAMETER MEASUREMENT INFORMATION
All timing parameters are referenced to VIH and VIL. Bit 1 = MSB (most significant bit) and is clocked in first on DIN
or clocked out first on DOUT. Bit N = LSB (least significant bit) and is clocked in last on DIN or is clocked out last on
DOUT. N = 8 for the companded mode, and N = 16 for the linear mode.
N–1 N 1 23 4 N1N1
N+1NN–1N–243210
CLK
FSR
DIN
tsu(FSR) th(FSR)
See Note B
See Note A th(DIN)
tsu(DIN)
Receive Time Slot
20%
20% 80% 80%
See Note C
N–2
NOTES: A. This window is allowed for FSR high.
B. This window is allowed for FSR low.
C. T ransitions are measured at 50%.
Figure 1. Fixed-Data Rate Mode, Receive Side Timing Diagram
N–1N–2321
N+1NN–1N–243210
N
th(FSX)
CLK
FSX
DOUT
TSX
See Note B
tpd2 tpd3
tpd1
tpd4
tpd5
Transmit Time Slot
tsu(FSX)
20% 80% 20% 80%
See Note C
20% 80%
See Note A
NOTES: A. This window is allowed for FSX high.
B. This window is allowed for FSX low (th(FSX) max determined by data collision considerations).
C. T ransitions are measured at 50%.
Figure 2. Fixed-Data Rate Mode, Transmit Side Timing Diagram
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
12 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
N–1 N 1 2 3 4 N–1 N 1
N+1NN–1N–243210
DCLKR
FSR
DIN
Receive Time Slot
tsu(FSR)
See Note A
th(FSR)
See Note Bth(DIN)
tsu(DIN)
80%20%
80% 80%
N–2
See Note C
20%
NOTES: A. This window is allowed for FSR high (tsu(FSR) max determined by data collision considerations).
B. This window is allowed for FSR low.
C. T ransitions are measured at 50%.
Figure 3. Variable-Data Rate Mode, Receive Side Timing Diagram
4 NN–1N–2321
N+1NN–1N–243210
DCLKX
FSX
DOUT
tsu(FSX)
Transmit Time Slot
th(FSX)
See Note B tpd8
tpd7
tpd6
See Note A
80% 20% 80% 20% 80%
See Note C
NOTES: A. This window is allowed for FSX high.
B. This window is allowed for FSX low without data repetition.
C. T ransitions are measured at 50%.
Figure 4. Variable-Data Rate Mode, Transmit Side Timing Diagram
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
13
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
general
system reliability features
The device should be powered up and initialized as follows:
1. Apply GND.
2. Apply VCC.
3. Connect all clocks.
4. Apply TTL high to PDN.
5. Apply synchronizing pulses to FSX and/or FSR.
Even though the VBAP is heavily protected against latch-up, it is still possible to cause it to latch up under certain
improper power conditions. To help ensure that latch-up does not occur , a reverse-biased Schottky diode with
a forward voltage drop of less than or equal to 0.4 V (1N571 1 or equivalent) should be connected between VCC
(power supply) and GND.
On the transmit channel, digital outputs DOUT and TSX are held in the high-impedance state for approximately
four frames (500 µs) after power up or application of VCC. After this delay, DOUT, TSX, and signaling are
functional and occur in the correct time slot. The analog circuits on the transmit side require approximately
60 ms to reach their equilibrium value due to the autozero circuit settling time. To further enhance system
integrity, DOUT and TSX are placed in the high-impedance state after an interruption of CLK.
power-down and standby operations
To minimize power consumption, a power-down mode and three standby modes are provided.
For power down, an external low signal is applied to PDN. In the absence of a signal, PDN is internally pulled
up to a high logic level and the device remains active. In the power-down mode, the average power consumption
is reduced to 2 mW.
Three standby modes give the user the option of placing the entire device on standby , placing only the transmit
channel on standby , or placing only the receive channel on standby . To place the entire device on standby , both
FSX and FSR are held low . For transmit-only operation (receive channel on standby), FSX is pulsing and FSR
is held low . For receive-only operation (transmit section on standby), FSR is pulsing and FSX is held low. When
the entire device is in standby mode, power consumption is reduced to 5 mW . See Table 1 for power-down and
standby procedures.
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
14 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
Table 1. Power-Down and Standby Procedures
DEVICE STATUS PROCEDURE TYPICAL POWER
CONSUMPTION DIGITAL OUTPUT STATUS
Power on PDN = high,
FSX = pulses,
FSR = pulses 20 mW Digital outputs active but not loaded
Power down PDN = low,
FSX, FSR = X2 mW TSX and DOUT in the high-impedance state
Entire device on standby
mode
FSX = low,
FSR = low,
PDN = high 5 mW TSX and DOUT in the high-impedance state
Only transmit channel in
standby mode
FSX = low,
FSR = pulses,
PDN = high 10 mW TSX and DOUT in the high-impedance state within five
frames
Only receive channel in
standby mode
FSR = low,
FSX = pulses,
PDN = high 10 mW Digital outputs active but not loaded
X = don’t care
fixed-data-rate timing
Fixed-data-rate timing is selected by connecting DCLKR to VCC and uses the master clock (CLK), frame
synchronization clocks (FSX and FSR), and the TSX output. FSX and FSR are inputs that set the sampling
frequency. Data is transmitted on DOUT on the positive transitions of CLK following the rising edge of FSX. Data
is received on DIN on the falling edges of CLK following FSR. A D/A conversion is performed on the received
digital word, and the resulting analog sample is held on an internal sample-and-hold capacitor until transferred
to the receive filter . The data word is eight bits long in the companded mode and 16 bits long in the linear mode.
variable-data-rate timing
Variable-data-rate timing is selected by connecting DCLKR to the receive data clock. In this mode, the master
clock (CLK) controls the switched-capacitor filters, while data transfer into DIN and out of DOUT is controlled
by DCLKR and DCLKX respectively. This allows the data to be transferred in and out of the device at any rate
up to the frequency of the master clock. DCLKR and DCLKX must be synchronous with CLK.
While the FSX input is high, data is transmitted from DOUT on consecutive positive transitions of DCLKX.
Similarly, while the FSR input is high, the data word is received at DIN on consecutive negative transitions of
DCLKR. The transmitted data word at DOUT is repeated in all remaining time slots in the frame as long as
DCLKX is pulsed and FSX is held high. This feature, which allows the data word to be transmitted more than
once per frame, is available only with variable-data-rate timing.
asynchronous operations
To avoid crosstalk problems associated with special interrupt circuits, the design includes separate converters,
filters, and voltage references on the transmit and receive sides to allow completely independent operation of
the two channels. In either timing mode, the master clock, data clock, and time-slot strobe must be synchronized
at the beginning of each frame.
precision voltage references
A precision band-gap reference voltage is generated internally and is used to supply all the references required
for operation of both the transmit and receive channels. The gain in each channel is trimmed during the
manufacturing process. This ensures very accurate, stable gain performance over variations in supply voltage
and device temperature.
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
15
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
conversion laws
The TL V320AC40 provides µ-law companding operation that approximates the CCITT G.71 1 recommendation.
The TLV320AC41 provides A-law companding operation that approximates the CCITT G.711 recommendation.
The linear mode of operation uses a 13-bit two’s-complement format and is the same for both the TL V320AC40
and the TLV320AC41.
transmit operation
microphone input
The microphone input amplifier is designed specifically to interface to electret-type microphone elements, as
shown in Figure 5. The VMID buffer circuit provides a voltage (MICBIAS) equal to 1/2 VCC as a reference for
the microphone amplifier and a bias voltage to the electret microphone. The microphone amplifier output
(MICGS) is used in conjunction with a feedback network and applied to the amplifier inverting input (MICIN) to
set the amplifier gain. In the companded mode, when the MICIN signal level decreases to a level near the noise
floor, the VBAP mutes the signal and outputs zero bits while continuing to monitor the signal level. When the
input level once again exceeds the noise threshold, the mute is released and normal operation resumes. Input
hysteresis is provided to ensure noiseless transitions in to and out of the muted condition. VMID appears at a
terminal to provide a place to filter the VMID voltage.
TLV320AC40/41 VBAP
2 k
17
VMID
18
MICIN
19
MICGS
20
MICBIAS
To Transmit Filters
Microphone Amplifier
VMID Buffer
10 k
+
VMID Reference
For Amplifiers
1 µFVMID
Generator
Electret
Microphone
+
3.3 µF
MICMUTE
6
10 k
+
VDD
470 pF
+
NOTE A: Terminal numbers shown are for the DW and N packages.
Figure 5. Typical Microphone Interface
microphone mute function
The MICMUTE input causes the digital circuitry to transmit all zero code on DOUT.
transmit filter
A low-pass antialiasing section is included on the device and achieves a 35-dB attenuation at the sampling
frequency. No external components are required to provide the necessary antialiasing function for the
switched-capacitor section of the transmit filter.
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
16 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
encoding
The encoder internally samples the output of the transmit filter and holds each sample on an internal
sample-and-hold capacitor. The encoder performs an A/D conversion on a switched-capacitor array. Digital
data representing the sample is transmitted on the first 8 or 16 data clock cycles of the next frame.
The autozero circuit corrects for dc offset on the input signal to the encoder using the sign-bit averaging
technique. The sign bit from the encoder output is long-term averaged and subtracted from the input to the
encoder.
data word structure
The data word is eight bits long in the companded mode and all eight bits represent one audio data sample.
The sign bit is the first bit transmitted.
The data word is 16 bits long in the linear mode. The first 13 bits comprise the audio data sample, and the last
three bits form the volume control word in the receive direction (DIN) and are zero pad bits in the transmit
direction (DOUT). The sign bit is transmitted first.
receive operation
decoding
In the companded mode, the serial data word is received at DIN on the first eight clock cycles in fixed-data rate
and on the last eight clock cycles in variable-data rate. In the linear mode, the serial data word is received at
DIN on the first 13 clock cycles. D/A conversion is performed, and the corresponding analog sample is held on
an internal sample-and-hold capacitor. This sample is transferred to the receive filter.
receive filter
The receive section of the filter provides passband flatness and stopband rejection that approximates both the
AT&T D3/D4 specification and CCITT recommendation G.712 when operated at the recommended
frequencies. The filter contains the required compensation for the (sin x)/x response of such decoders.
receive buffer
The receive buffer contains the volume control.
earphone amplifier
The earphone audio-output amplifier has a balanced output, as shown in Figure 6, to allow maximum flexibility
in output configuration. The output amplifier is designed to directly drive a piezo earphone in the differential
configuration without any additional external components. The output can also be used to drive a single-ended
load with the output signal voltage centered around VCC/2.
The receive-channel output level can be adjusted between specified limits by connecting an external resistor
network to EARGS.
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
17
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
_
+
_
+
IN
VMID
4
2
3
EARGS
EARA
EARB
+
NOTE A: Terminal numbers shown are for the DW and N packages.
Figure 6. Earphone Audio-Output Amplifier Configuration and Internal Gain-Setting Network
receive data format
In the companded mode, eight bits of data are received. The sign bit is the first bit received (see Table 2).
In the linear mode, 16 bits of data are received. The first 13 bits are the D/A code, and the remaining three bits
form the volume control word (see Table 2). The volume control function is actually an attenuation control in
which the first bit received is the most significant. The maximum volume occurs when all three volume control
bits are zero. Eight levels of attenuation are selectable in 3-dB steps, giving a maximum attenuation of 21 dB
when all bits are 1s. The volume control bits are not latched into the VBAP and must be present in each received
data word.
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
18 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
Table 2. Receive-Data Bit Definitions
BIT NO. COMPANDED MODE LINEAR MODE
0 CD7 LD12
1 CD6 LD11
2 CD5 LD10
3 CD4 LD9
4 CD3 LD8
5 CD2 LD7
6 CD1 LD6
7 CD0 LD5
8 LD4
9 LD3
A LD2
B LD1
C LD0
D V2
E V1
F V0
Volume control and other control bits always follow the PCM data in time:
Companded Mode:
Linear Data Volume Control
Linear Mode:
Companded Data
V2LD0LD1LD2LD3LD4LD12 LD11 LD10 LD9 LD8 LD7 LD6 LD5
CD0CD1CD2CD3CD4CD5CD6CD7
V1 V0
MSB
(sign bit) LSB
MSB
(sign bit) LSB
Time
where:
CD7CD0 = Data word when in companded mode
LD12LD0 = Data word when in linear mode
V2, V1, V0 = Volume (attenuation control) 000 = maximum volume, 3 dBm0
111 = minimum volume, –18 dBm0
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
19
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
APPLICATION INFORMATION
output gain set design considerations (see Figure 7)
EARA and EARB are low-impedance complementary outputs. The voltages at the nodes are:
VO+ at EARA
VO– at EARB
VOD = VO+ – VO– (total differential response)
R1 and R2 are a gain-setting resistor network with the center tap connected to EARGS.
A value greater than 10 k and less than 100 k for R1 + R2 is recommended because of the following:
The parallel combination R1 + R2 and RL sets the total loading. The total capacitance at EARGS and the
parallel combination of R1 and R2 define a time constant that has to be minimized to avoid inaccuracies.
VA represents the maximum available digital mW output response (VA = 1.001 Vrms).
VOD = A × VA
where A = 1 + (R1/R2)
4 + (R1/R2)
Digital mW Sequence
IAW CCITT G.712
VO–
VO+
RL
3
4
2
R2
R1
VO
DIN
EARB
EARGS
EARA
NOTE A: Terminal numbers shown are for the DW and N packages.
Figure 7. Gain-Setting Configuration
higher clock frequencies and sample rates
The VBAP is designed to work with sample rates up to 16 kHz where the frequency of the frame sync determines
the sampling frequency. However , there is a fundamental requirement to maintain the ratio of the master clock
frequency, fCLK, to the frame sync frequency, fFSR/fFSX. This ratio for the VBAP is 1.152 MHz/8 kHz, or 144
master clocks per frame sync. For example, to operate the VBAP at a sampling rate of fFSR and fFSX equal to
16 kHz, fCLK must be 144 times 16 kHz, or 2.304 MHz. If the VBAP is operated above an 8-kHz sample rate,
however, it is expected that the performance becomes somewhat degraded. Exact parametric specifications
for rates up to 16-kHz sample rate are not specified at this time.
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
20 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
MECHANICAL DATA
DW (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE
16 PIN SHOWN
4040000/B 03/95
Seating Plane
0.400 (10,15)
0.419 (10,65)
0.104 (2,65) MAX
1
0.012 (0,30)
0.004 (0,10)
A
8
16
0.020 (0,51)
0.014 (0,35)
0.293 (7,45)
0.299 (7,59)
9
0.010 (0,25)
0.050 (1,27)
0.016 (0,40)
(15,24)
(15,49)
PINS **
0.010 (0,25) NOM
A MAX
DIM
A MIN
Gage Plane
20
0.500
(12,70)
(12,95)
0.510
(10,16)
(10,41)
0.400
0.410
16
0.600
24
0.610
(17,78)
28
0.700
(18,03)
0.710
0.004 (0,10)
M
0.010 (0,25)
0.050 (1,27)
0°–8°
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion not to exceed 0.006 (0,15).
D. Falls within JEDEC MS-013
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
21
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
MECHANICAL DATA
N (R-PDIP-T**) PLASTIC DUAL-IN-LINE PACKAGE
20
0.975
(24,77)
0.940
(23,88)
18
0.920
0.850
14
0.775
0.745
(19,69)
(18,92)
16
0.775
(19,69)
(18,92)
0.745
A MIN
DIM
A MAX
PINS **
0.310 (7,87)
0.290 (7,37)
(23.37)
(21.59)
Seating Plane
0.010 (0,25) NOM
14/18 PIN ONLY
4040049/C 08/95
9
8
0.070 (1,78) MAX
A
0.035 (0,89) MAX 0.020 (0,51) MIN
16
1
0.015 (0,38)
0.021 (0,53)
0.200 (5,08) MAX
0.125 (3,18) MIN
0.240 (6,10)
0.260 (6,60)
M
0.010 (0,25)
0.100 (2,54) 0°–15°
16 PIN SHOWN
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. Falls within JEDEC MS-001 (20 pin package is shorter then MS-001.)
TLV320AC40, TLV320AC41
3-V VOICE-BAND AUDIO PROCESSORS (VBAP)
SLWS045A – JUNE 1996 – REVISED APRIL 1997
22 POST OFFICE BOX 655303 DALLAS, TEXAS 75265
MECHANICAL DATA
PT (S-PQFP-G48) PLASTIC QUAD FLATPACK
4040052/B 03/95
0,13 NOM
0,17
0,27
25
24
SQ
12
13
36
37
6,80
7,20
1
48
5,50 TYP
0,25
0,45
0,75
0,05 MIN
SQ
9,20
8,80
1,35
1,45
1,60 MAX
Gage Plane
Seating Plane
0,10
0°–7°
0,50 M
0,08
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Falls within JEDEC MO-136
D. This may also be a thermally-enhanced plastic package with leads connected to the die pads.
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