MAXIM MAX9505 User Manual

General Description

The MAX9505 filters and amplifies standard-definition
video signals. Maxim’s DirectDrive™ technology elimi­nates large output-coupling capacitors and sets the
video black level to ground. An internal reconstruction
filter smoothes the steps and reduces the spikes on the
video signal from the video digital-to-analog converter
(DAC). The input of the MAX9505 can be directly con­nected to the output of a DAC. The MAX9505 provides
a compact, integrated, and low-power solution.

The reconstruction filter typically has 3dB attenuation at
9MHz and 50dB attenuation at 27MHz, and ±1dB pass­band flatness to 5.5MHz.

Maxim’s DirectDrive uses an integrated charge pump
and a linear regulator to create a negative power supply
to drive the sync below ground. The charge pump injects
so little noise into the video output that the picture is visi­bly flawless.

The MAX9505 features an internal 1.7Ω analog switch
that interfaces with a 4-pole multimedia jack. This
switch allows one of the poles to be set as a video
input, a video output, or a microphone input.

The MAX9505 is offered in space-saving 16-pin QSOP
and 16-pin TQFN packages and is specified over the

-40°C to +85°C extended temperature range.

Applications

Mobile Phones/Smartphones

Space-Constrained, Low-Power Audio/Video
Portable Devices

Features

♦ DC-Coupled Output

♦ Direct Connection to Video DAC

♦ Video Output Black Level Set to Ground

♦ Video Reconstruction Filter with 50dB

Attenuation at 27MHz

♦ 6dB Gain

♦ 1.7Ω R

ON

Analog Switch

♦ 10nA Shutdown Supply Current

♦ 2.7V to 3.6V Single-Supply Operation

MAX9505

DirectDrive Video Amplifier with

Reconstruction Filter and Analog Switch

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

0 TO 50mV

-0.1V TO
+0.1V

MAX9505

AMP

LINEAR

REGULATOR

CHARGE

PUMP

BUFFER

VIDOUT

VIDIN

6dB

S

OUT

S

IN

LOWPASS

FILTER

0V

0V

Block Diagram

19-3675; Rev 1; 8/05

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

PART*

PIN­PACKAGE

PKG CODE

TOP MARK

MAX9505EEE 16 QSOP E16-4 —

MAX9505ETE 16 TQFN T1633-4 ACW

Functional Diagram/Typical Operating Circuit and Pin
Configurations appear at end of data sheet.

*All devices are specified over the -40°C to +85°C operating
temperature range.

MAX9505

DirectDrive Video Amplifier with
Reconstruction Filter and Analog Switch

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= CPVDD= MODE1 = 3.0V, MODE0 = SGND = GND = CPGND = 0V, C1 = C2 = C3 = C4 = 1µF, R

BIAS

= 100kΩ, TA= T

MIN

to

T

MAX

. RL= 150Ω to SGND, unless otherwise noted. V

VIDIN

= 286mV, gain = 6dB. Typical values are at VDD= CPV

DD

= MODE1 = 3.0V,

T

A

= +25°C, unless otherwise noted.) (Note 1)

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 in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

VDDto SGND............................................................-0.3V to +4V

VIDIN to SGND .........................................................-0.3V to +4V

BIAS to SGND ............................................-0.3V to (V

DD

+ 0.3V)

MODE0, MODE1 to SGND .......................................-0.3V to +4V

S

IN

, S

OUT

, VIDOUT to SGND (The greater of VSSand -2V)

to (V

DD

+ 0.3V)
CPV

DD

to CPGND ....................................................-0.3V to +4V

C1P, C1N, CPV

SS

.............................Capacitor Connection Only

CPGND, SGND, GND............................................-0.1V to +0.1V

CPV

SS

to V

SS ..................................................................

-0.1V to +0.1V

VIDOUT Short Circuit to V

DD

, SGND

and the Greater of (V

SS

and -2V) ...........................Continuous

Continuous Current

VIDIN, BIAS, MODE0, MODE1, S

IN

, S

OUT

...................±20mA

Continuous Power Dissipation (T

A

= +70°C)

16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW

16-Pin TQFN (derate 15.6mW/°C above +70°C) .......1349mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage Range

V

DD

,

CPV

DD

Guaranteed by DC voltage gain and
quiescent supply current

2.7 3.6 V

Quiescent Supply Current I

DD

VDD = 3.6V (IDD = I

VDD

+ I

CPVDD

, RL = ∞)1215mA

Shutdown Supply Current I

SHDN

VDD = 3.6V (I

SHDN

= I

VDD

+ I

CPVDD

),

SHDN = SGND

1µA

Bias Voltage V

BIAS

1V

VIDEO AMPLIFIER

Guaranteed by DC voltage gain,
V

DD

= 2.7V

Input Voltage Range

Guaranteed by DC voltage gain, V

DD

= 3V

V

Input Current I

IN

VDD = 2.7V

µA

Input Resistance R

IN

1MΩ

DC Voltage Gain (Note 2) A

V

VDD = 2.7V to 3.6V 5.5 6 6.5 dB

Output Black Level (Note 3) VDD = 2.7V

0

V

Output Voltage Swing

V

P-P

Output Short-Circuit Current I

SC

Sinking or sourcing 50 mA

Output Resistance R

OUT

Ω

Shutdown Output Impedance MODE1 = MODE0 = SGND 4 kΩ

MODE1 = MODE0 = V

DD

VIDOUT Leakage Current

MODE1 = SGND and MODE0 = V

DD

µA

V

RANGE

-0.10 +1.05

-0.10 +1.28

-2.5 +2.5

Guaranteed by DC voltage gain, VDD = 2.7V 2.162

Guaranteed by DC voltage gain, VDD = 3V 2.594

-0.1

0.01

+0.1

0.01

0.01

0.01

MAX9505

DirectDrive Video Amplifier with

Reconstruction Filter and Analog Switch

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VDD= CPVDD= MODE1 = 3.0V, MODE0 = SGND = GND = CPGND = 0V, C1 = C2 = C3 = C4 = 1µF, R

BIAS

= 100kΩ, TA= T

MIN

to

T

MAX

. RL= 150Ω to SGND, unless otherwise noted. V

VIDIN

= 286mV, gain = 6dB. Typical values are at VDD= CPV

DD

= MODE1 = 3.0V,

T

A

= +25°C, unless otherwise noted.) (Note 1)

PARAMETER

CONDITIONS

UNITS

ANALOG SWITCH

MODE1 = V

DD

1.7 4.4

On-Resistance R

ON

MODE0 = VDD,
I

SIN

= 10mA

1.2 2.5

Ω

MODE1 = V

DD

0.5 0.9

On-Resistance Flatness (Note 4)

MODE0 = VDD,

0.3 0.5

Ω

S

OUT

Off-Leakage Current

(Note 5)

MODE0 = SGND, VDD = 3.6V, V

SIN

= 0.3V,

3.3V, V

SOUT

= 3.3V, 0.3V

-1 +1 nA

SIN On-Leakage Current (Note 5)

MODE0 = VDD, VDD = 3.6V, V

SIN

= 0.3V,

3.3V, V

SOUT

= 3.3V, 0.3V

-1 +1 nA

Turn-On Time

V

SIN

= 1.5V, RL = 300Ω, CL = 35pF,

Figure 1; V

IH

= 1.5V, VIL = 0V

35 60 ns

Turn-Off Time

V

SIN

= 1.5V; RL = 300Ω, CL = 35pF,

Figure 1; V

IH

= 1.5V, VIL = 0V

50 80 ns

Charge Injection

V

GEN

= 1.5V, R

GEN

= 0Ω, CL = 1nF,

Figure 2

20 pC

MODE0 = SGND, f = 10MHz;
V

SOUT

= 1V

P-P

, RL = 50Ω, CL = 5pF

30

Off-Isolation

MODE0 = SGND, f = 1MHz; V

SOUT

= 1V

P-P

,

R

L

= 50Ω, CL = 5pF

50

dB

On-Channel -3dB Bandwidth

MODE0 = V

DD

, signal = 0dBm, RL = 50Ω,

C

L

= 5pF

MHz

Total Harmonic Distortion MODE0 = VDD, V

SIN

= 2V

P-P

, RL = 600Ω

%

S

OUT

Off-Capacitance MODE0 = SGND, f = 1MHz 18 pF

Switch On-Capacitance MODE0 = VDD, f = 1MHz 60 pF

CROSSTALK (VIDEO TO AUDIO)

VIDIN to S

IN

MODE1 = MODE0 = VDD, f = 20kHz,
1V

P-P

at VIDIN

dB

VIDOUT to S

IN

MODE1 = VDD, MODE0 = SGND,
f = 20kHz, 2V

P-P

at VIDOUT

85 dB

CHARGE PUMP

Switching Frequency

300 kHz

LOGIC SIGNALS (MODE0, MODE1)

Logic-Low Threshold V

IL

VDD = 2.7V to 3.6V 0.5 V

Logic-High Threshold V

IH

VDD = 2.7V to 3.6V 1.5 V

Logic Input Current I

IL

1µA

SYMBOL

MIN TYP MAX

MODE1 = SGND

I

= 10mA, VDD = 3V

SIN

MODE1 = SGND

150 250

200

0.025

100

MAX9505

DirectDrive Video Amplifier with
Reconstruction Filter and Analog Switch

4 _______________________________________________________________________________________

AC ELECTRICAL CHARACTERISTICS

(V

DD

= CPV

DD

= MODE1 = 3.0V, MODE0 = SGND = GND = CPGND = 0V, C1 = C2 = C3 = C4 = 1µF, R

BIAS

= 100kΩ, TA= T

MIN

to

T

MAX

. RL = 150Ω to SGND, unless otherwise noted. V

VIDIN

= 286mV, gain = 6dB. Typical values are at VDD= CPV

DD

= MODE1 = 3.0V,

T

A

= +25°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Passband Flatness VDD = 2.7V, f = 100kHz to 5.5MHz -1 0 +1 dB

f = 9.1MHz 3

Attenuation

V

DD

= 2.7V,

VIDOUT= 2V

P-P

, attenuation

is referred to 100kHz

f = 27MHz 35 50

dB

Power-Supply Rejection Ratio PSRR f = 100kHz 62 dB

Output Impedance Z

OUT

f = 5MHz 0.5 Ω

Differential Gain Error DG NTSC, VIDOUT = 2V

P-P

0.1 %

Differential Phase Error DP NTSC, VIDOUT = 2V

P-P

0.2

degrees

2T Pulse-to-Bar K Rating

2T = 250ns, bar time is 18µs, the beginning

2.5% and the ending 2.5% of the bar time
are ignored

K%

2T Pulse Response 2T = 250ns 0.3 K%

2T Bar Response

2T = 250ns, bar time is 18µs, the beginning

2.5% and the ending 2.5% of the bar time
are ignored

0.7 K%

Nonlinearity 5-step staircase 0.2 %

Group Delay Distortion D

Dt

100kHz to 5.5MHz 10 ns

VIDOUT Capacitive-Load Stability

C

L

V

OUT

= 2V

P-P

, no sustained oscillations 20 pF

Peak Signal-to-RMS Noise SNR 100kHz to 5.5MHz 64 dB

Enable Time t

ON

VIDIN = 0.5V, VIDOUT settled to within 1%
of the final voltage

0.2 ms

Disable Time t

OFF

VIDIN = 0.5V, VIDOUT settled to below 1%
of the output voltage

0.1 ms

Note 1: All devices are 100% production tested at TA= +25°C. Specifications over temperature are guaranteed by design.
Note 2: Voltage gain (A

V

) is a two-point measurement in which the output voltage swing is divided by the input voltage swing.

Note 3: With an output load attached, this offset will directly contribute to quiescent current.
Note 4: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the

specified analog signal ranges.

Note 5: Guaranteed by design.

-0.3

MAX9505

DirectDrive Video Amplifier with

Reconstruction Filter and Analog Switch

_______________________________________________________________________________________ 5

Timing Diagrams

V

DD

V

DD

S

IN

S

OUT

MODE0

SGND

LOGIC
INPUT

V

NO

V

OUT

R

L

C

L

CL INCLUDES FIXTURE AND STRAY CAPACITANCE.
V

OUT

= V

NO (RL

/ (RL + RON))

MODE0

SWITCH OUTPUT

0V

V

IL

0.9 x V

OUT

50%

V

IH

0.9 x V

OUT

V

OUT

t

ON

t

OFF

tR < 5ns
t

F

< 5ns

Figure 1. Analog Switch Turn-On/Off Time

V

DD

V

DD

S

IN

S

OUT

SGND

V

OUT

C

L

MODE0

R

GEN

V

GEN

VIL TO V

IH

IN

∆V

OUT

OFFOFF

ON

V

OUT

IN

Q = (∆V

OUT

) (CL)

Figure 2. Charge Injection