MAXIM MAX9680 Technical data

19-4904; Rev 1; 12/10

Block Diagram

EVALUATION KIT

AVAILABLE

Internal Gain and Filter in SC70

General Description

The MAX9680 high-speed amplifier and filter is optimized for portable video applications. It is specifically designed to be compatible with the video encoders embedded in application processors with 0.4V output. The input common-mode range includes GND, which allows a video DAC (digital-to-analog converter) to be DC-coupled to the MAX9680.

The output swings within 2mV of GND and 20mV to VDD with a standard back-terminated video load (150I). An internal level shift circuit prevents the output from saturating with 0V input, thus preventing sync-pulse clipping in common video circuits. Therefore, the MAX9680 is ideally suited for DC-coupling to the video load.

The MAX9680 has been optimized for space-sensitive applications by integrating internal gain setting resistors (G = 5.2V/V) and a 2-pole video-DAC reconstruction filter.

In shutdown mode, the quiescent current is reduced to less than 0.4FA, dramatically reducing power consumption and prolonging battery life.

The MAX9680 is available in the tiny 2mm x 2.1mm, 6-pin, SC70 package.

P-P

video

3V Video Amplifier with

Features

S 5.2V/V Internal Gain

S 2-Pole Reconstruction Filter

S Input Range Includes Ground

S DC-Coupled Inputs and Outputs

S Rail-to-Rail Output

S 3.7mA Low Quiescent Current

S 0.4µA Shutdown Current

Ordering Information

PART

MAX9680AXT+T

+Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

Typical Application Circuit appears at end of data sheet.

TEMP

RANGE

-40NC to +125NC

PIN-

PACKAGE

6 SC70 ADT

TOP

MARK

MAX9680

Applications

Mobile Phones

Digital Still Cameras

Digital Video Cameras

Pin Configuration

TOP VIEW

GND

RSET

MAX9680

SC70

ENABLE

OUT

RSET

ENABLE

MAX9680

SHUTDOWN

CONTROL

LPF

OUT

G = 5.2V/V

GND

BUFFER

SET

_______________________________________________________________ Maxim Integrated Products 1

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

3V Video Amplifier with Internal Gain and Filter in SC70

ABSOLUTE MAXIMUM RATINGS

Supply Voltage (VDD to GND) .................................-0.3V to +4V

ENABLE to GND ......................................................-0.3V to +4V

IN to GND ................................................. -0.3V to (VDD + 0.3V)

OUT to GND (ENABLE is high) ................ -0.3V to (VDD + 0.3V)

OUT to GND (ENABLE is low) .............................-0.3V to +3.2V

ENABLE, IN ..................................................................... Q50mA

OUT ...........................................................................Continuous

Electrostatic Discharge

MAX9680

Human Body Model .......................................................2000V

Charged Device Model ...................................................500V

PACKAGE THERMAL CHARACTERISTICS (Note 1)

SC70

Junction-to-Ambient Thermal Resistance (qJA) .....326.5°C/W

Junction-to-Case Thermal Resistance (qJC) .............115°C/W

Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a 4-layer

board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.

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.

ELECTRICAL CHARACTERISTICS

= V

= +25NC.) (Note 2)

OFFSET LEVEL-SHIFT VOLTAGE

Output Level-Shift Voltage V Power-Supply Rejection Ratio PSRR VIN = V

INPUT VOLTAGE RANGE

Input Voltage Range V

Input Resistance (In+) R R

Resistance R

SET

SET/RIN

VOLTAGE GAIN

DC Voltage Gain (Note 3) A

FREQUENCY RESPONSE

Filter Response

Differential Gain Error

Differential Phase Error

= 2.8V, V

ENABLE

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Ratio 4.214 4.3 4.386

= 0V, RL = 150I to GND. TA = -40NC to +125NC, unless otherwise noted. Typical values are at TA

GND

OLS

SET

VIN = V

GND

VDD = 2.7V V VDD = 2.8V V VIN = 0.5V 732 872 1012

= 0.5V 3150 3750 4350

RSET

VDD = 2.7V, VIN = V

VDD = 2.8V, VIN = V

VIN = V

0.387V

Five-step modulated staircase of 127.8mV step size and 305.3mV peak-to-peak subcarrier amplitude, f = 4.43MHz

GND

Continuous Power Dissipation (TA = +70NC)

6-Pin SC70 (derate 3.1mW/C above +70NC) .............245mW

Operating Temperature Range ........................ -40NC to +125NC

Junction Temperature .....................................................+150NC

Storage Temperature Range ............................ -65NC to +150NC

Lead Temperature (soldering, 10s) ................................+300NC

Soldering Temperature (reflow) ......................................+260NC

0 120 250 mV

, VDD = 2.7V to 3.6V 200

GND

to 0.445V 5.00 5.17 5.34

GND

to 0.464V 5.00 5.17 5.34

GND

f = 4.5MHz -0.2

f = 9MHz -3.5

f = 27MHz -23

f = 54MHz -45

0.2 %

0.3 degrees

0.445

0.464

FV/V

V/V

2 ______________________________________________________________________________________

3V Video Amplifier with

Internal Gain and Filter in SC70

ELECTRICAL CHARACTERISTICS (continued)

= V

= +25NC.) (Note 2)

Group Delay Variation Signal-to-Noise Ratio SNR 100% white signal 65 dB

OUTPUT

Positive Voltage Output Swing from Rail

Negative Voltage Output Swing from Rail

Positive Voltage Output Swing from Rail

Negative Voltage Output Swing from Rail

Output Leakage Disabled, V Output Short-Circuit Current I

POWER SUPPLY

Supply Voltage V Supply Current I

ENABLE/SHUTDOWN FUNCTION

Disabled (Logic-Low Threshold) 0 0.45 V Enabled (Logic-High Threshold) 1.3 V Enable Time 350 ns Disable Time 200 ns Shutdown Current Disabled 0.4 4

Note 2: All devices are 100% production tested at TA = +25NC. Specifications over temperature limits are guaranteed by design. Note 3: Voltage gain (AV) is a two-point measurement in which the output voltage swing is divided by the input voltage swing.

ENABLE

= 2.8V, V

= 0V, RL = 150I to GND. TA = -40NC to +125NC, unless otherwise noted. Typical values are at TA

GND

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

100kHz P f P 5.5MHz, VIN = V

GND

to 0.387V

15 ns

VIN = 0.7V 20 250 mV

VIN = -0.05V 1.8 5 mV

35 mV

1 mV

OUT

VIN = 0.7V, RL = 75I to GND

VIN = -0.05V, RL = 75I to GND

= 2V 2

OUT

Short to GND 90 mA

2.7 3.6 V

No load 3.7 9 mA

MAX9680

Typical Operating Characteristics

= V

INPUT RESISTANCE vs. TEMPERATURE

890

885

880

875

870

INPUT RESISTANCE (I)

865

860

-60 140

ENABLE

= 2.8V, V

TEMPERATURE (°C)

= 0V, RL = 150I to GND. TA = +25NC, unless otherwise noted.)

GND

= 0.4V

MAX9680 toc01

120100806040200-20-40

SET RESISTANCE vs. TEMPERATURE

3900

3850

3800

3750

3700

SET RESISTANCE (I)

3650

3600

-60 140 TEMPERATURE (°C)

vs. TEMPERATURE

4.5

MAX9680 toc02

4.4

4.3

(I/I)

SET

4.2

4.1

120100806040200-20-40

4.0

SET/RIN

TEMPERATURE (°C)

_______________________________________________________________________________________ 3

120100806040200-20-40-60 140

MAX9680 toc03

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