Datasheet TSH340 Datasheet (ST)

TSH340

320MHz Single Supply Video Buffer with Low In/Out Rail

■ Bandwidth: 320MHz

■ Single supply operation down to 3V

■ Low input & output rail

■ Very low harmonic distortion

■ Slew rate: 780V/µs

■ Voltage input noise: 7nV/√Hz

■ Specified for 150Ω and 100Ω loads

■ Internal gain of 6dB

■ Compatible with the PCB layout of a single

op-amp

■ Tested on 5V power supply

■ Data min. and max. are tested during

production

Description

The TSH340 is a single supply video buffer
featuring an internal gain of 6dB and a large
bandwidth of 320MHz for only 9.8mA of quiescent
current.

An advantage of this circuit is its input and output
negative rail feature, which is very close to GND in
single supply. This rail is teste d and guaranteed
during production at 60mV maximum from GND
on a 150Ω load. This al lows a good o utput swing
which fits perfectly when driving a v ideo sign al on
a 75Ω video line. Chapter 5 of this datasheet
gives technical support when using the TSH340
as a driver for video DAC output on a video line. In
particular, this chapter focuses on applying a
video signal DC shift to avoid any clamping of the
synchronization tip.

Pin Connections (top view)

OUT

OUT

NC

NC
NC

NC

IN

IN

GND

GND

GND

GND

1

1
2

2
3

3
4

4

1

1
2

2
3

3

SOT23-5

SOT23-5

SO8

SO8

5

5

4

4

+VCC

+VCC

NCIN

NCIN

8

8
7

7
6NCOUT

6NCOUT
5

5

NC

NC

+Vcc

+Vcc

Applications

■ High-end video systems

■ High Definition TV (HDTV)

■ Broadcast and graphic video

■ Multimedia products

The TSH340 is available in tiny SOT23-5 and
SO8 plastic packages.

Order Codes

Part Number Temperature Range Package Packaging Marking

TSH340ILT

TSH340ID

TSH340IDT Tape & Reel TSH340I

April 2005 Revision 2 1/13

-40°C to +85°C

SOT23-5 Tape & Reel K306

SO-8

Tube TSH340I

TSH340 Absolute Maximum Ratings

1 Absolute Maximum Ratings

Table 1. Key parameters and their absolute maximum ratings

Symbol Parameter Value Unit

V

T

T

Supply voltage

CC

V

Input Voltage Range

in

Operating Free Air Temperature Range

oper

Storage Temperature

std

T

Maximum Junction Temperature

j

Thermal Resistance Junction to Case

R

thjc

SOT23-5
SO8

Thermal Resistance Junction to Ambient Area

R

thja

SOT23-5
SO8

Maximum Power Dissipation (@Ta=25°C) for Tj=150°C

P

max.

SOT23-5
SO8

CDM: Charged Device Model

ESD

HBM: Human Body Model
MM: Machine Model

1) All voltage values, except differential voltage, are with respect to network terminal.

2) The magnitude of input and output voltage must never exceed VCC +0.3V.

1

2

6V

-0.2 to +3 V

-40 to +85 °C

-65 to +150 ° C
150 °C

80

°C/W

75

250

°C/W

175

500

mW

715

2

1.5

200

kV
kV

V

Table 2. Operating conditions

Symbol Parameter Value Unit

V

Power Supply Voltage

CC

Vicm Common Mode Input Voltage -0.4 to 3 V

1) Tested in full production at 0V/5V single power supply

3 to 5.5

1

V

2/13

Electrical Characteristics TSH340

2 Electrical Characteristics

Table 3. V

= +5V, T

CC

= 25°C (unless otherwise specified)

amb

Symbol Parameter Test Condition Min. Typ. Max. Unit

DC Performance

out

1

)

V

OS

I

ib

PSR

ICC

Output Offset Voltage

Input Bias Current T

Power Supply Rejection Ratio
20 log (∆V

/∆V

cc

Total Supply Current no Load, Vin=100mV

G DC Voltage Gain R

Input Resistance T

Rin

Input Capacitance T

Cin

no Load, T

-40°C < T
, V

amb

-40°C < T

=200mVp-p, F=1MHz

∆V

cc

icm

amb

< +85°C

amb

=0.6V

< +85°C

amb

-30 -5 +30

-6.8
616

7.2

-90 dB

9.8 12.8 mA

L = 150Ω 1.95 2 2.05 V/V

amb
amb

8MΩ

3.2 pF

Dynamic Performance and Output Characteristics

Bw

FPBW

SR

V

OH

V

OL

I

OUT

-3dB Bandwidth Small Signal V
=0.6V, RL = 150Ω

V

icm

Gain Flatness @ 0.1dB Small Signal V

=0.6V, RL = 150Ω

V

icm

Full Power Bandwidth V

icm

R

= 150Ω

L

=0.6V, V

Slew Rate Vicm=0.6V, V

= 150Ω

R

L

High Level Output Voltage RL = 150Ω
Low Level Output Voltage RL = 150Ω
Output Short Circuit Current (Isource) T

amb

-40°C < T

Output Current Vout=2Vp, T

OUT

OUT

< +85°C

amb

amb

out=20mVp

out=20mVp

= 2Vp-p,

= 2Vp-p,

190 320

MHz

63

130 200 MHz

780 V/µs

3.7 3.9 V
40 60 mV

100

90

45 87 mA

Noise and Distortion

eN Equivalent Input Noise Voltage F = 100kHz 7 nV/√Hz

iN Equivalent Input Noise Current F = 100kHz 1.5 pA/√Hz

HD2

HD3

1) Output Offset Voltage is determined from the following expression: V

2nd Harmonic Distortion V

3rd Harmonic Distortion V

= 2Vp-p, RL = 150Ω

OUT

F= 10MHz,

= 1Vp-p, RL = 150Ω

OUT

F= 10MHz,

=G.VIN+V

OUT

-85 dBc

-75 dBc

OS

mV

µA

mA

3/13

TSH340 Electrical Characteristics

M

Figure 1. Frequency response

16
14
12
10

8
6
4
2
0

-2

Gain (d B)

-4

-6

-8

-10

Vcc=5V

-12

Load=100 or 150

-14

SO8 and SOT23-5

-16
1M 10M 100M

Ω

Frequency (Hz)

Figure 2. Gain flatness - SOT23-5

7,0

6,8

6,6

6,4

6,2
6,0

5,8

Gain (dB)

5,6

5,4

5,2

Vcc=5V

5,0

1M 10M 100M

Load=150Ω

Load=100Ω

Frequency (Hz)

Figure 4. Frequency response on capa-load

20

C=10pF

10

0

Riso=22

C=22pF
Riso=22

Ω

C=1pF
Riso=0

Ω

C=47pF

-10

Frequency Response (dB)

Vcc=5V
Load=Riso + C//1k

-20
1M 10M 100M

Ω (to ground)

Riso=15Ω

C=0
Riso=0

Frequency (Hz)

Figure 5. Gain flatness - SO8

7,0

6,8

6,6

6,4

6,2
6,0

5,8

Gain (dB)

5,6

5,4

5,2

Vcc=5V

5,0

1M 10M 100M

Load=150Ω

Load=100Ω

Frequency (Hz)

Figure 3. T otal input noise vs. frequency

non-inverting input in short-circuit
Vcc=5V

100

Input Noise (nV/VHz)

10

100 1k 10k 100k 1M 10

Frequency (Hz)

4/13

Figure 6. Positive and negative slew rate

3,0

Vcc=5V

2,5

Load=100Ω or 150Ω

2,0

SR+

1,5

1,0

Output Response (V)

0,5

0,0

-5ns -4ns -3ns -2ns -1ns 0s 1ns 2ns 3ns 4ns 5ns

SR-

Time (ns)

Electrical Characteristics TSH340

Figure 7. Distortion on 100Ω load

-30

-35

-40

-45

-50

-55

-60

-65

-70

-75

-80

HD2 & HD3 (dBc)

-85

-90

-95

-100
01234

HD3
(30MHz)

HD2
(30MHz)

HD3
(10MHz)

HD2
(10MHz)

Output Amplitude (Vp-p)

Vcc=5V
Load=100

Figure 8. Output lower rail vs. frequency

500

Vcc=5V
Load=100

400

300

Ω or 150Ω

Figure 10. Distortion on 150Ω load

HD2
(30MHz)

HD2
(10MHz)

HD3
(30MHz)

Vcc=5V
Load=150

Ω

-30

-35

-40

-45

-50

-55

-60

-65

-70

-75

-80

HD2 & HD3 (dBc)

-85

-90

Ω

-95

-100
01234

HD3
(10MHz)

Output Amplitude (Vp-p)

Figure 11. Output voltage swing vs. Vcc

5

4

3

200

Vol (mV)

100

0

10k 100k 1M 10M 100M

Frequency (Hz)

Figure 9. Output voltage swing vs. frequency

5

4

3

2

Vout max. (Vp-p)

1

Vcc=5V
Load=100

0

1M 10M

Ω or Load=150Ω

Frequency (Hz)

2

Vout max (Vp-p)

1

F=30MHz
Load=100

0

3,00 3,25 3,50 3,75 4,00 4,25 4,50 4,75 5,00

Ω or 150Ω

Vcc (V)

Figure 12. Quiescent current vs. vcc

20

no load

15

10

Icc (mA)

5

0

1,5 2,0 2,5 3,0 3,5 4,0 4,5 5,0

Vcc (V)

5/13

TSH340 Electrical Characteristics

0

Figure 13. Isource

0

-10

-20

-30

-40

+3V

-50

-60

-70

Isource (mA)

-80

-90

-100

-110

-120
0,0 0,5 1,0 1,5 2,0 2,5 3,0 3,5 4,0 4,5 5,

+5V

VOH

without loa d

Isource

V

0V

V (V)

Figure 14. Bandwidth vs. temperature

500

450

400

350

300

Bw (MHz)

250

200

150

Vcc=5V
Load=150

100

-40-200 20406080

Ω

Temperature (°C)

Figure 16. Reverse isolation vs. frequency

0

-20

-40

-60

Gain (dB)

-80

Small Signal
Vcc=5V

Ω

Load=100

-100
1M 10M 100M 1G

Frequency (Hz)

Figure 17. Voltage gain vs. temperature

2,05

2,04

2,03

2,02

2,01
2,00

1,99

Gain (dB)

1,98

1,97

Output: short-c ircuit

1,96

Vcc=5V

1,95

-40-200 20406080

Temperature (°C)

Figure 15. Output offset vs. temperature

0

-1

-2

Vos (mV)

-3

-4

Vcc=5V

Ω

Load=150

-5

-40-200 20406080

Temperature (°C)

6/13

Figure 18. Ibias vs. temperature

7,0

6,5

6,0

5,5

5,0

(µA)

BIAS

I

4,5

4,0

3,5

Vcc=5V
Load=150

3,0

-40-200 20406080

Ω

Temperature (°C)

Electrical Characteristics TSH340

V

(V)

V

(V)

Figure 19. Supply current vs. temperature

12

11

10

(mA)

CC

I

9

8

Vcc=5V
no Load

7

-40-200 20406080

Temperature (°C)

Figure 20. Output lower rail vs. temperature

0,10

0,08

Vcc=5V
Load=150

Ω

0,06

OL

0,04

0,02

0,00

-40-200 20406080

Temperature (°C)

Figure 21. Output higher rail vs. temperature

4,50

4,25

4,00

OH

3,75

Vcc=5V
Load=150

3,50

-40-200 20406080

Ω

Temperature (°C)

7/13

TSH340 Evaluation Boards

3 Evaluation Boards

An evaluation board kit optimized for high-speed operational amplifiers is available (order code:
KITHSEVAL/STDL). T he kit includes t he following evaluation boards, as well as a CD-ROM containing
datasheets, articles, application notes and a user manual:

z SOT23_SINGLE_HF BOARD: B oard for the eval uation of a singl e high-speed op-amp in SOT23-5

package.

z SO8_SINGLE_HF: Board for the evaluation of a single high-speed op-amp in SO8 package.
z SO8_DUAL_HF: Board for the evaluation of a dual high-speed op-amp in SO8 package.
z SO8_S_MULTI: Board for the evaluation of a single high-speed op-amp in SO8 package in inverting

and non-inverting configuration, dual and signle supply.

z SO14_TRIPLE: Board for the eval uation of a tri ple h igh-spe ed op -amp in SO 14 pack age with vide o

application considerations.

Board material:

z 2 layers
z FR4 (εr=4.6)

z epoxy 1.6mm
z copper thickness: 35µm

Figure 22: Evaluation kit for high speed op-amps

8/13

Power Supply Considerations TSH340

4 Power Supply Considerations

Correct power supply bypassin g is very impor tant for optimi zing performa nce in high -frequency r anges.
Bypass capacitors should be placed as close as possible to the IC pins to improve high-frequency
bypassing. A capacitor greater than 10µF is necessary to minimize the distortion. For better quality
bypassing, a capacit or of 10nF is added using the sam e implementation cond itions. Bypass capacito rs
must be incorporated for both the negative and the positive supply. On the SO8_SINGLE_HF board,
these capacitors are C8 and C6.

Figure 23: Circuit for power supply bypassing

+VCC

+VCC

TSH340

TSH340

10nF

10nF

CC

CC

+V

+V

GND

GND

10microF

10microF

+

+

9/13

TSH340 Using the TSH340 to Drive Video Signals

5 Using the TSH340 to Drive Video Signals

Figure 24. Implementation of the video driver on output video DACs

Volt

Volt

Video

Video
Signal

Signal

+5V

+5V

Reconstruction

Reconstruction

Filtering

Video

Video
DAC

DAC

1Vpp

1Vpp1Vpp

Filtering

LPF

LPF

6dB

6dB

VOL(100MHz) = 180mV (Figure 8)
To drive the video signal properly, the output of the driver must be at least equal to 250mV

(assuming V

z 1st solution:

and VOL variations).

OS

Set the video DAC 0-IRE output level to 125mV.

2.250V

2.250V

250mV

250mV

time

time

75Ω

75Ω

2Vpp

2Vpp

Volt

Volt

Volt

75Ω Cable

75Ω Cable

Video

Video
Signal

Signal

1.125V

1.125V

1.125V

1.125V

125mV

125mV

125mV

125mV

time

time

time

time

1Vpp

1Vpp1Vpp

75Ω

75Ω

100 IRE

White Level

White Level

Black Level

Black Level

z 2nd solution:

100 IRE

30 IRE

30 IRE

0 IRE

0 IRE

300mV

300mV

Synchronization Tip

Synchronization Tip

Image Content

Image Content

125mV

125mV

0V

0V

Implementation of a DC component in the input of the driver.

Volt

Video

Video
DAC

DAC

DC component

DC component

33uF

33uF

1Vpp

1Vpp1Vpp

=125mV

=125mV

Reconstruction

Reconstruction

Filtering

Filtering

LPF

LPF

1k

1k

+5V

+5V

6dB

6dB

Volt

Video

Video
Signal

Signal

2.250V

2.250V

time

time

1Vp-p

1Vp-p

250mV

250mV

2Vpp

2Vpp

75Ω

75Ω

Volt

Volt

Volt

75Ω Cable

75Ω Cable

Video

Video
Signal

Signal

1.125V

1.125V

1.125V

1.125V

125mV

125mV

125mV

125mV

time

time

time

time

1Vpp

1Vpp1Vpp

75Ω

75Ω

10/13

Package Mechanical Data TSH340

6 Package Mechanical Data

6.1 SO-8 package

SO-8 MECHANICAL DATA

DIM.

A 1.35 1.75 0.053 0.069
A1 0.10 0.25 0.04 0.010
A2 1.10 1.65 0.043 0.065

B 0.33 0.51 0.013 0.020

C 0.19 0.25 0.007 0.010

D 4.80 5.00 0.189 0.197

E 3.80 4.00 0.150 0.157

e 1.27 0.050

H 5.80 6.20 0.228 0.244

h 0.25 0.50 0.010 0.020

L 0.40 1.27 0.016 0.050

k ˚ (max.)

ddd 0.1 0.04

MIN. TYP MAX. MIN. TYP. MAX.

mm. inch

8

0016023/C

11/13

TSH340 Package Mechanical Data

6.2 SOT23-5L (5-pin) package

SOT23-5L MECHANICAL DATA

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 0.90 1.45 35.4 57.1

A1 0.00 0.15 0.0 5.9

A2 0.90 1.30 35.4 51.2

b 0.35 0.50 13.7 19.7

C 0.09 0.20 3.5 7.8

D 2.80 3.00 110.2 118.1

E 2.60 3.00 102.3 118.1

E1 1.50 1.75 59.0 68.8

e.95 37.4

e1 1.9 74.8

L 0.35 0.55 13.7 21.6

mm. mils

0

12/13

TSH340

7 Revision History

Date Revision Description of Changes

01 Jan. 2005 1 First release corresponding to Preliminary Data version of datasheet.

23 Mar. 2005 2 Datasheet of mature, full-specification product.

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13/13