ST TS652 User Manual
TS652
TS652
DIFFERENTIAL VARIABLE GAIN AMPLIFIER
■LOW NOISE : 4.6nV/√ Hz
■LOW DISTORTION
■HIGH SLEW RATE : 90V/μs
■WIDE BANDWIDTH : 52MHz @ -3dB & 18dB gain
■GAIN PROGRAMMABLE from -9dB to +30dB with 3dB STEPS
■POWER DOWN FUNCTION
DESCRIPTION
The TS652 is a differential digitally controled variable gain amplifier featuring a high slew rate of 90V/μs, a large bandwidth, a very low distortion and a very low current and voltage noise.
The gain can be set from -9dB to +30dB through a 4bit digital word, with 3dB steps.
The gain monotonicity is guaranteed by design.
This device is particularly intended for applications such as preamplification in telecommunication systems using multiple carriers.
APPLICATION
■Preamplifier and automatic gain control for Assymetric Digital Subscriber Line (ADSL).
ORDER CODE
Part Number |
Temperature Range |
Package |
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D |
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TS652ID |
-40, +85°C |
• |
D
SO-14
(Plastic Micropackage)
PIN CONNECTIONS (top view)
+Vcc1 |
1 |
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14 |
+Vcc2 |
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Input 1 2 |
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13 |
Output 1 |
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Input 2 |
3 |
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12 |
Output 2 |
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GC1 4 |
ControlGain |
DecoderLogic |
11 |
Power Down |
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GC2 5 |
10 |
-Vcc |
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GC3 6 |
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9 |
AGND |
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GC4 |
7 |
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8 DGND |
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D = Small Outline Package (SO) - also available in Tape & Reel (DT)
May 2000 |
1/9 |
TS652
ABSOLUTE MAXIMUM RATINGS
Symbol |
Parameter |
Value |
Unit |
VCC
Vi
Toper
Tstd
Tj
Rthjc
Supply voltage 1) |
14 |
V |
Input Voltage 2) |
0 to 14 |
V |
Operating Free Air Temperature Range TS652ID |
-40 to + 85 |
°C |
Storage Temperature |
-65 to +150 |
°C |
Maximum Junction Temperature |
150 |
°C |
Thermal Resistance Junction to Case |
15 |
°C/W |
Output Short Circuit Duration |
Infinite |
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1.All voltages values are with respect to network terminal.
2.The magnitude of input and output voltages must never exceed VCC +0.3V.
OPERATING CONDITIONS
Symbol |
Parameter |
Value |
Unit |
VCC |
Supply Voltage |
5 to 12 |
V |
Vicm |
Common Mode Input Voltage |
+ VCC/2 |
V |
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TS652
ELECTRICAL CHARACTERISTICS. VCC = ±6Volts, Tamb = 25°C (unless otherwise specified).
Symbol Parameter Test Conditio n Min. Typ. Max Unit
DC PERFORMANCE
Vi |
Voltage on the Input Pin |
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0 |
V |
ICC |
Total Supply Current |
No load, Vout = 0 |
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28 |
mA |
Iccpdw |
Power Down Total Consumption |
Power Down Mode |
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150 |
μA |
VOFFSET |
Differential Input Offset Voltage |
Vin = 0, AV = 30dB |
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6 |
mV |
SVR |
Supply Voltage Rejection Ratio |
AV = 0dB |
50 |
80 |
dB |
AC PERFORMANCE
Zin |
Input Impedance |
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Zout |
Power Down Output Impedance |
Power Down Mode |
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VOH |
High Level Output Voltage |
RL = 500Ω |
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RL connected to GND |
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VOL |
Low Level Output Voltage |
RL = 500Ω |
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RL connected to GND |
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AV |
Voltage Gain |
F= 1MHz |
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Gain monotonicity guaranteed by design |
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PAV |
Precision of the Voltage Gain |
F= 1MHz |
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Avstep |
Step Value |
F= 1MHz |
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Avmin |
Gain Mismatch between Both |
F= 1MHz |
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Channels |
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Bandwidth @ -3dB |
AV = -9dB |
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AV = 0dB |
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Bw |
RL = 500Ω |
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AV = +18dB |
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CL = 15pF |
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AV = +30dB |
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Rbw |
Bandwidth Roll-off |
AV = +30dB, F = 1MHz |
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Io |
Bandwidth @ -3dB |
|Source| |
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RL = 500Ω, CL = 15pF |
Sink |
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SR |
Slew Rate (gain independent) |
Vo = 2Vpeak |
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100kΩ//5pF |
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100kΩ |
150kΩ//5pF |
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4 |
4.5 |
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V |
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-4.5 |
-4 |
V |
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-9 |
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30 |
dB |
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-1 |
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1 |
dB |
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2.4 |
3 |
3.6 |
dB |
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1 |
dB |
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55 |
110 |
200 |
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32 |
69 |
132 |
MHz |
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26 |
52 |
100 |
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10 |
18 |
36 |
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0.08 |
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dB |
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17 |
28 |
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mA |
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17 |
22 |
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50 |
100 |
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V/μs |
NOISE AND DISTORTION
in |
Equivalent Input Noise Current F = 100kHz |
1.5 |
pA/√ Hz |
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en |
Equivalent Input Noise Voltage |
F = 100kHz |
4.6 |
nV/√ Hz |
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AV |
= 30dB |
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1Vpeak, F = 150kHz, |
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AV = +30dB, RL = 500Ω//15pF |
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THD30 |
Harmonic Distorsion |
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H2 |
-70 |
dBc |
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H3 |
-93 |
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H4 |
-98 |
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H5 |
-99 |
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Vout = 1Vpeak, AV = +30dB |
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Third Order Intermodulation |
RL = 500Ω//15pF |
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@ 80kHz |
-77 |
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IM3 |
Product |
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dBc |
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@ 380kHz |
-85 |
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F1 = 180kHz, F2 = 280kHz |
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@640kHz |
-86 |
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@740kHz |
-87 |
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Vout = 1Vpeak, AV = +30dB |
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Third Order Intermodulation |
RL = 500Ω//15pF |
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@ 60kHz |
-77 |
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IM3 |
Product |
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dBc |
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@ 90kHz |
-79 |
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F1 = 70kHz, F2 = 80kHz |
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@220kHz |
-83 |
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@230kHz |
-84 |
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