TI TL32088

TL32088
DIFFERENTIAL ANALOG BUFFER AMPLIFIER
FOR THE TLC320AD58
SLAS123B – MARCH 1995 – REVISED NOVEMBER 1995
D
D
D
D
D
D
NS PACKAGE
(TOP VIEW)
Analog Front-End Integrated Circuit for the
18-Bit Stereo Audio Sigma-Delta Analog-toDigital Converter TLC320AD58C
Low Distortion, Low Noise
– THD+N . . . 0.00056% Typ
– SNR . . . 108-dB Typ
Adjustable Signal Gain
5-V Single Supply Operation
Internal Voltage Reference
Operating Temperature . . . 0°C to 70°C
REF L1
AVSS
IN L+
IN L–
OUT L
REF L
FLTL 1
FLTL 2
AOUT L1
AOUT L2
description
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
REF R1
IN R+
IN R–
OUT R
REF R
FLTR 1
FLTR 2
AOUT R1
AOUT R2
AVCC
The TL32088 is an analog signal conditioning
AVAILABLE OPTIONS
integrated circuit built using a proprietary Texas
PACKAGE
Instruments bipolar process. This device is used
T
SMALL
OUTLINE
A
for the analog signal input stage for the 18-bit,
(NS)
stereo audio, sigma-delta, analog-to-digital
0°C to 70°C
TL32088CNS
converter (ADC) TLC320AD58C exclusively. The
TL32088 can convert input signals from
single-ended to differential and differential to
single-ended. The TL32088 also implements a single-ended to single-ended and differential to differential
amplifier buffer. The differential output can be connected to the TLC320AD58C directly. The TLC32088 is
composed of high performance amplifiers that offer wide output swing with low distortion and low noise. The
reference voltage for the internal amplifier circuit is provided from an internal voltage reference circuit.
The TL32088 provides a wide output swing while maintaining 0.00056% THD+N and 108-dB SNR and,
therefore, is ideally suited for high-end audio systems.
functional block diagram
OUT R
IN R–
IN R+
REF R
_
+
5 kΩ
FLTR 1
FLTR 2
5 kΩ
R1
_
R2
+
R OUT
AOUT R1
R OUT
AOUT R2
L OUT
REF R1
REF L1
AOUT L2
+
_L2
IN L+
IN L–
L OUT
AOUT L1
+
_L1
5 kΩ
OUT L
REF L
5 kΩ
FLTL 1
FLTL 2
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.
Copyright  1995, 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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
TL32088
DIFFERENTIAL ANALOG BUFFER AMPLIFIER
FOR THE TLC320AD58
SLAS123B – MARCH 1995 – REVISED NOVEMBER 1995
absolute maximum rating over operating free-air temperature range (unless otherwise noted)†
Supply voltage, AVCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Differential input voltage, VID (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AVCC
Input voltage range, VI (any input) (see Notes 1 and 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 to AVCC
Output voltage, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 to AVCC
Output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Duration of short-circuit current at or below 25°C (output shorted to GND) . . . . . . . . . . . . . . . . . . . . . unlimited
Continuous total power dissipation, PD (TA ≤ 25°C) (see Note 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625 mW
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°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 affect device reliability.
NOTES: 1. All voltage values, except differential voltage, are with respect to GND.
2. Differential voltage is at the noninverting input with respect to the inverting input.
3. All input voltage values must not exceed VCC.
4. Derating factor above TA = 25°C is 10 mW/°C.
recommended operating conditions
Supply voltage, AVCC
Input voltage range, VI (see Note 5)
Operating free-air temperature, TA
MIN
NOM
MAX
UNIT
4.75
5
5.25
V
1.1
3.9
V
0
70
°C
NOTE 5: The output voltage is undetermined when the input voltage exceeds recommended input voltage range.
electrical characteristics over recommended operating free-air temperature range, VCC = 5 V
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
VIO
Input offset voltage
VIC = 2.5 V,,
VO = 2.5 V (AMP L1, R1)
TA = 25°C
TA = 0°C to 70°C
1
IIO
Input offset current
VIC = 2.5 V,,
VO = 2.5 V (AMP L1, R1)
TA = 25°C
TA = 0°C to 70°C
5
IIB
Input bias current
VIC = 2.5 V,,
VO = 2.5 V (AMP L1, R1)
TA = 25°C
TA = 0°C to 70°C
20
VIC
Common mode input voltage
Common-mode
VO ≤ 7
7.5
5 mV (AMP L1,
L1 R1)
TA = 25°C
TA = 0°C to 70°C
VOM+
VOM–
Maximum positive-peak output voltage
Avd
CMRR
Differential voltage amplification
Vref
EG
Reference voltage
ro
Output resistance
ICC
Gain error
Supply current (both channels)
100
150
150
250
0.9
4.1
1.1
3.9
4.4
TA = 25°C
TA = 25°C
60
2.5
nA
nA
V
V
dB
2.6
V
± 3%
See Note 6
VO = 2
2.5
5V
V,
mV
dB
85
2.4
UNIT
V
0.6
VO = 2.5 V ± 1 V (AMP L1, R1)
VO = 2.5 V ± 1 V (AMP L1, R1)
No load
TA = 25°C
TA = 25°C
TA = 0°C to 70°C
NOTE 6: Gain error is between OUT L and FLTL 1, OUT R and FLTR 1.
2
6
7.5
Maximum negative-peak output voltage
Common-mode rejection ratio
MAX
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
Ω
50
17
20
25
mA
TL32088
DIFFERENTIAL ANALOG BUFFER AMPLIFIER
FOR THE TLC320AD58
SLAS123B – MARCH 1995 – REVISED NOVEMBER 1995
operating characteristics over recommended operating free-air temperature range, VCC = 5 V
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
SR
Slew rate
AV = 1,
VI = 2.5 V + 0.5 V (AMP L1, R1)
B1
SNR
Unity-gain bandwidth
AMP L1, R1
Signal-to-noise ratio (EIAJ)
A-Weighted test circuit (see Figure 2)
Total harmonic distortion plus noise
VO(PP) = 3.2 V f = 1 kHz,
BW = 10 Hz to 20 kHz test circuit
Crosstalk
VO(PP) = 3.2 V,
THD+N
TYP
104
MAX
3
V/µs
7
MHz
108
0.00056%
f = 20 kHz
UNIT
dB
0.001%
– 125
dB
APPLICATION INFORMATION
AVCC
TL32088
1
2
5 kΩ
Analog
Input L
100
kΩ
100 pF
10
kΩ
REF L1
3
IN L+
4
IN L–
+
_
+
_
IN R+
19
IN R–
18
5
OUT L
OUT R
17
6
REF L
REF R
16
FLTR 1
15
FLTR 2
14
AOUT R1
13
50 Ω
50 Ω AOUT R2
12
50 Ω
50 Ω
11
5 kΩ
7
_
+
5 kΩ
8
9
10
kΩ
100
pF
Analog
Input R
100
kΩ
+ _
5 kΩ
FLTL 2
AOUT L1
10 AOUT L2
5 kΩ
10 µF
5 kΩ
FLTL 1
200 pF
OUT L–
(INLM)†
20
AVSS
10 µF
OUT L+
(INLP)†
REF R1
AVCC
200 pF
OUT R+
(INRP)†
OUT R–
(INRM)†
† TLC320AD58C input terminals.
Figure 1. TL32088 to TLC320AD58C Connections
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
TL32088
DIFFERENTIAL ANALOG BUFFER AMPLIFIER
FOR THE TLC320AD58
SLAS123B – MARCH 1995 – REVISED NOVEMBER 1995
APPLICATION INFORMATION
Table 1. A-Weighted Data
FREQUENCY
A WEIGHTING (dB)
FREQUENCY
A WEIGHTING (dB)
25
– 44.6 ± 2
800
– 0.1 ± 1
31.5
– 39.2 ± 2
1000
0 ±0
40
– 34.5 ± 2
1250
0.6 ± 1
50
– 30.2 ± 2
1600
1.0 ± 1
63
– 26.1 ± 2
2000
1.2 ± 1
80
– 22.3 ± 2
2500
1.2 ± 1
100
– 19.1 ± 1
3150
1.2 ± 1
125
– 16.1 ± 1
4000
1.0 ± 1
160
– 13.2 ± 1
5000
0.5 ± 1
200
– 10.8 ± 1
6300
– 0.1 ± 1
250
– 8.6 ± 1
8000
– 1.1 ± 1
315
– 6.5 ± 1
10000
– 2.4 ± 1
400
– 4.8 ± 1
12500
– 4.2 ± 2
500
– 3.2 ± 1
16000
– 6.5 ± 2
630
– 1.9 ± 1
—
—
10
Attenuation – dB
0
– 10
– 20
– 30
– 40
– 50
20
100
1k
10 k 20 k
Signal Frequency – Hz
Figure 2. A-Weighted Function
4
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
TL32088
DIFFERENTIAL ANALOG BUFFER AMPLIFIER
FOR THE TLC320AD58
SLAS123B – MARCH 1995 – REVISED NOVEMBER 1995
MECHANICAL DATA
NS (R-PDSO-G**)
PLASTIC SMALL-OUTLINE PACKAGE
14 PIN SHOWN
PINS **
14
16
20
24
A MAX
10,50
10,50
12,90
15,30
A MIN
9,90
9,90
12,30
14,70
DIM
0,51
0,35
1,27
14
0,25 M
8
0,15 NOM
5,60
5,00
8,20
7,40
Gage Plane
1
7
0,25
0°– 10°
A
1,05
0,55
Seating Plane
2,00 MAX
0,05 MIN
0,10
4040062 / B 10/94
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion, not to exceed 0,15.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
PACKAGE OPTION ADDENDUM
www.ti.com
30-Mar-2005
PACKAGING INFORMATION
Orderable Device
Status (1)
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
TL32088CNSLE
OBSOLETE
SO
NS
20
TBD
Call TI
Call TI
TL32088CNSR
OBSOLETE
SO
NS
20
TBD
Call TI
Call TI
Lead/Ball Finish
MSL Peak Temp (3)
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
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Addendum-Page 1
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