ANALOG DEVICES ADA4950-1, ADA4950-2 Service Manual

Low Power, Selectable Gain

–

FEATURES

High performance at low power High speed

−3 dB bandwidth of 750 MHz, G = 1

0.1 dB flatness to 210 MHz, V Slew rate: 2900 V/μs, 25% to 75%

Fast 0.1% settling time of 9 ns Low power: 9.5 mA per amplifier Low harmonic distortion

108 dB SFDR @ 10 MHz

98 dB SFDR @ 20 MHz Low output voltage noise: 9.2 nV/√Hz, G = 1, RTO ±0.2 mV typical input offset voltage Selectable differential gains of 1, 2, and 3 Differential-to-differential or single-ended-to-differential

operation Adjustable output common-mode voltage Input common-mode range shifted down by 1 V Wide supply range: +3 V to ±5 V Available in 16-lead and 24-lead LFCSP packages

APPLICATIONS

ADC drivers Single-ended-to-differential converters IF and baseband gain blocks Differential buffers Line drivers

GENERAL DESCRIPTION

The ADA4950-1/ADA4950-2 are gain-selectable versions of the

ADA4932-1/ADA4932-2 with on-chip feedback and gain resistors.

They are ideal choices for driving high performance ADCs as singleended-to-differential or differential-to-differential amplifiers. The output common-mode voltage is user adjustable by means of an internal common-mode feedback loop, allowing the ADA4950-1/ ADA4950-2 output to match the input of the ADC. The internal feedback loop also provides exceptional output balance as well as suppression of even-order harmonic distortion products.

Differential gain configurations of 1, 2, and 3 are easily realized with internal feedback networks that are connected externally to set the closed-loop gain of the amplifier.

The ADA4950-1/ADA4950-2 are fabricated using the Analog Devices, Inc., proprietary silicon-germanium (SiGe) complementary bipolar process, enabling them to achieve low levels of distortion and noise at low power consumption. The low offset and excellent dynamic performance of the ADA4950-x make it well suited for a wide variety of data acquisition and signal processing applications.

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners.

OUT, dm

= 2 V p-p, R

L, dm

BE

= 200 Ω

Differential ADC Driver, G = 1, 2, 3

ADA4950-1/ADA4950-2

FUNCTIONAL BLOCK DIAGRAMS

1+INB

2+INA

3–INA

4+INB

1–INA1 2–INB1 3+V

S1

4+V

S1

5+INB2 6+INA2

40

V

=2V p-p

OUT, dm

–50

–60

–70

–80

–90

–100

–110

HARMONIC DISTORTION (dBc)

–120

–130

–140

0.1 1 10 100

Figure 3. Harmonic Distortion vs. Frequency at Various Supplies

The ADA4950-x is available in a Pb-free, 3 mm × 3 mm, 16-lead LFCSP (ADA4950-1, single) or a Pb-free, 4 mm × 4 mm, 24-lead LFCSP (ADA4950-2, dual). The pinout has been optimized to facilitate PCB layout and minimize distortion. The ADA4950-1/ ADA4950-2 are specified to operate over the −40°C to +105°C temperature range; both operate on supplies from +3 V to ±5 V.

HD2, ±5V HD3, ±5V HD2, ±2.5V HD3, ±2.5V

S

–V

14

13

15

16

ADA4950-1

5

6

S

+V

12 PD

11 –OUT

10 +OUT

9V

8

7

S

+V

Figure 1. ADA4950-1

S1

–V

+INB1

+INA1

24

PD1

–OUT1

20

19

21

22

23

ADA4950-2

9

7

8

11

12

10

S2

+V

–INA2

OCM2

–INB2

V

+OUT2

Figure 2. ADA4950-2

FREQUENCY (MHz)

OCM

18 +OUT1 17 V

OCM1

16 –V

S2

–V

15

S2

14

PD2

13 –O UT2

07957-001

07957-002

07957-025

ADA4950-1/ADA4950-2

REVISION HISTORY

5/09—Revision 0: Initial Version

Rev. 0 | Page 2 of 28

ADA4950-1/ADA4950-2

SPECIFICATIONS

±5 V OPERATION

TA = 25°C, +VS = 5 V, −VS = −5 V, V refer to single-ended input and differential outputs, unless otherwise noted. Refer to Figure 52 for signal definitions.

Differential Inputs to V

OUT, dm

Table 1.

Parameter Test Conditions/Comments Min Typ Max Unit

DYNAMIC PERFORMANCE

−3 dB Small-Signal Bandwidth V

−3 dB Large-Signal Bandwidth V

Bandwidth for 0.1 dB Flatness V

ADA4950-1 210 MHz

ADA4950-2 230 MHz Slew Rate V Settling Time to 0.1% V Overdrive Recovery Time VIN = 0 V to 5 V ramp, G = 2 20 ns

NOISE/HARMONIC PERFORMANCE See Figure 51 for distortion test circuit

Second Harmonic V 1 MHz −108 dBc 10 MHz −107 dBc 20 MHz −98 dBc 50 MHz −80 dBc Third Harmonic V 1 MHz −126 dBc 10 MHz −105 dBc 20 MHz −99 dBc 50 MHz −84 dBc IMD3 f1 = 30 MHz, f2 = 30.1 MHz, V Voltage Noise (Referred to Output) f = 1 MHz Gain = 1 9.2 nV/√Hz Gain = 2 12.5 nV/√Hz Gain = 3 16.6 nV/√Hz Crosstalk (ADA4950-2)

INPUT CHARACTERISTICS

Offset Voltage (Referred to Input) V T Input Capacitance Single-ended at package pin 0.5 pF Input Common-Mode Voltage Range

CMRR DC, ∆V Open-Loop Gain 64 66 dB

OUTPUT CHARACTERISTICS

Output Voltage Swing

Linear Output Current 200 kHz, R Output Balance Error

Gain Error Gain = 1 0.5 1.2 % Gain = 2 1.0 1.9 % Gain = 3 0.8 1.7 %

= 0 V, G = 1, RT = 53.6  (when used), R

OCM

Performance

= 0.1 V p-p 750 MHz

OUT, dm

= 2.0 V p-p 350 MHz

OUT, dm

= 2.0 V p-p, RL = 200 Ω

OUT, dm

= 2 V p-p, 25% to 75% 2900 V/μs

OUT, dm

= 2 V step 9 ns

OUT, dm

= 2 V p-p

OUT, dm

= 2 V p-p

OUT, dm

f = 10 MHz; Channel 2 active, Channel 1 output

= V

+DIN

−DIN

to T

MIN

MAX

Directly at internal amplifier inputs, not external input terminals

OUT, dm

Maximum ∆V

= 1 kΩ

R

L

/∆V

∆V

OUT, cm

see Figure 50 for output balance test circuit

= 0 V −2.5 ±0.2 +2.5 mV

OCM

variation –3.7 μV/°C

/∆V

, ∆V

IN, cm

, single-ended output,

OUT

= 10 Ω, SFDR = 69 dB 114 mA peak

L, dm

, ∆V

OUT, dm

= 1 kΩ, unless otherwise noted. All specifications

L, dm

= 2 V p-p −94 dBc

OUT, dm

−87 dB

= ±1 V −64 −49 dB

IN, cm

–V

+ 1.4 to

S

– 1.4

+V

S

= 2 V p-p, 1 MHz;

−62 dB

−V +V

+ 0.2 to

S

− 1.8

S

+ 1.2 to

S

− 1.2

S

V

Rev. 0 | Page 3 of 28

ADA4950-1/ADA4950-2

V

to V

OCM

Table 2.

Parameter Test Conditions/Comments Min Typ Max Unit

V

DYNAMIC PERFORMANCE

OCM

−3 dB Small-Signal Bandwidth V

−3 dB Large-Signal Bandwidth V Slew Rate VIN = 1.5 V to 3.5 V, 25% to 75% 430 V/μs Input Voltage Noise (Referred to Input) f = 1 MHz 9.8 nV/√Hz

V

INPUT CHARACTERISTICS

OCM

Input Voltage Range

Input Resistance 22 26 32 kΩ Input Offset Voltage V V

CMRR ΔV

OCM

Gain ΔV

General Performance

Table 3.

Parameter Test Conditions/Comments Min Typ Max Unit

POWER SUPPLY

Operating Range 3.0 11 V Quiescent Current per Amplifier 8.8 9.5 10.1 mA T Powered down 0.7 1.0 mA Power Supply Rejection Ratio ΔV

POWER-DOWN (PD)

PD Input Voltage Enabled ≥(+VS – 1.8) V Turn-Off Time 600 ns Turn-On Time 28 ns PD Pin Bias Current per Amplifier

Enabled Disabled

OPERATING TEMPERATURE RANGE −40 +105 °C

Performance

OUT, cm

= 100 mV p-p 250 MHz

OUT, cm

= 2 V p-p 105 MHz

OUT, cm

+ 1.2 to

–V

S

+V

– 1.2

S

= V

+DIN

OUT, dm

OUT, cm

MIN

OUT, dm

= 0 V −6 +0.8 +6 mV

−DIN

/ΔV

, ΔV

OCM

/ΔV

OCM

to T

variation 31 μA/°C

MAX

= ±1 V −60 −49 dB

OCM

, ΔV

= ±1 V 0.98 1.0 1.01 V/V

OCM

/ΔVS, ΔVS = 1 V p-p −96 −84 dB

V

Powered down ≤(+V

– 2.5) V

S

PD PD

= 5 V = 0 V

−1.0 +0.2 +1.0 μA

−250 −180 −140 μA

Rev. 0 | Page 4 of 28

ADA4950-1/ADA4950-2

5 V OPERATION

TA = 25°C, +VS = 5 V, −VS = 0 V, V refer to single-ended input and differential outputs, unless otherwise noted. Refer to Figure 52 for signal definitions.

Differential Inputs to V

OUT, dm

Table 4.

Parameter Test Conditions/Comments Min Typ Max Unit

DYNAMIC PERFORMANCE

−3 dB Small-Signal Bandwidth V

−3 dB Large-Signal Bandwidth V Bandwidth for 0.1 dB Flatness V

ADA4950-1 220 MHz

ADA4950-2 160 MHz Slew Rate V Settling Time to 0.1% V Overdrive Recovery Time VIN = 0 V to 2.5 V ramp, G = 2 19 ns

NOISE/HARMONIC PERFORMANCE See Figure 51 for distortion test circuit

Second Harmonic V 1 MHz −108 dBc 10 MHz −107 dBc 20 MHz −98 dBc 50 MHz −82 dBc Third Harmonic V 1 MHz −124 dBc 10 MHz −114 dBc 20 MHz −99 dBc 50 MHz −83 dBc IMD3 f1 = 30 MHz, f2 = 30.1 MHz, V Voltage Noise (Referred to Input) f = 1 MHz Gain = 1 9.2 nV/√Hz Gain = 2 12.5 nV/√Hz Gain = 3 16.6 nV/√Hz Crosstalk (ADA4950-2)

INPUT CHARACTERISTICS

Offset Voltage (Referred to Input) V T Input Capacitance Single-ended at package pin 0.5 pF Input Common-Mode Voltage Range

CMRR DC, ∆V Open-Loop Gain 64 66 dB

OUTPUT CHARACTERISTICS

Output Voltage Swing

Linear Output Current 200 kHz, R Output Balance Error

Gain Error Gain = 1 0.5 1.2 % Gain = 2 1.0 1.9 % Gain = 3 0.8 1.7 %

= 2.5 V, G = 1, RT = 53.6  (when used), R

OCM

Performance

= 0.1 V p-p 770 MHz

OUT, dm

= 2.0 V p-p 320 MHz

OUT, dm

= 2.0 V p-p, RL = 200 Ω

OUT, dm

= 2 V p-p, 25% to 75% 2200 V/μs

OUT, dm

= 2 V step 10 ns

OUT, dm

= 2 V p-p

OUT, dm

= 2 V p-p

OUT, dm

f = 10 MHz; Channel 2 active, Channel 1 output

= V

+DIN

−DIN

to T

MIN

MAX

Directly at internal amplifier inputs, not external input terminals

OUT, dm

Maximum ∆V

= 1 kΩ

R

L

/∆V

∆V

OUT, cm

see Figure 50 for output balance test circuit

= 2.5 V −4 ±0.4 +4 mV

OCM

variation −3.7 μV/°C

/∆V

, ∆V

IN, cm

, single-ended output,

OUT

= 10 Ω, SFDR = 67 dB 70 mA peak

L, dm

, ∆V

OUT, dm

= 1 kΩ, unless otherwise noted. All specifications

L, dm

= 2 V p-p −94 dBc

OUT, dm

−87 dB

–V +V

S

+ 0.2 to

– 1.8

V

= ±1 V −64 −49 dB

V

= 1 V p-p, 1 MHz;

–V +V

S

+ 1.2 to

– 1.2

S

–V +V

S

+ 1.1 to

– 1.1

−62 dB

Rev. 0 | Page 5 of 28

ADA4950-1/ADA4950-2

V

to V

OCM

Table 5.

Parameter Test Conditions/Comments Min Typ Max Unit

V

DYNAMIC PERFORMANCE

OCM

−3 dB Small-Signal Bandwidth V

−3 dB Large-Signal Bandwidth V Slew Rate VIN = 1.5 V to 3.5 V, 25% to 75% 380 V/μs Input Voltage Noise (Referred to Input) f = 1 MHz 9.8 nV/√Hz

V

INPUT CHARACTERISTICS

OCM

Input Voltage Range

Input Resistance 22 26 32 kΩ Input Offset Voltage V V

CMRR ΔV

OCM

Gain ΔV

General Performance

Table 6.

Parameter Test Conditions/Comments Min Typ Max Unit

POWER SUPPLY

Operating Range 3.0 11 V Quiescent Current per Amplifier 8.4 8.9 9.6 mA T Powered down 0.6 0.9 mA Power Supply Rejection Ratio ΔV

POWER-DOWN (PD)

PD Input Voltage Enabled ≥(+VS – 1.8) V Turn-Off Time 600 ns Turn-On Time 29 ns PD Pin Bias Current per Amplifier

Enabled Disabled

OPERATING TEMPERATURE RANGE −40 +105 °C

Performance

OUT, cm

= 100 mV p-p 240 MHz

OUT, cm

= 2 V p-p 90 MHz

OUT, cm

+ 1.2 to

–V

S

+V

– 1.2

S

= V

+DIN

OUT, dm

OUT, cm

MIN

OUT, dm

= 2.5 V −6.5 +1.0 +6.5 mV

−DIN

/ΔV

, ΔV

OCM

/ΔV

OCM

to T

variation 31 μA/°C

MAX

= ±1 V −60 −49 dB

OCM

, ΔV

= ±1 V 0.98 1.0 1.01 V/V

OCM

/ΔVS, ΔVS = 1 V p-p −96 −84 dB

V

Powered down ≤(+V

– 2.5) V

S

PD PD

= 5 V = 0 V

−1.0 +0.2 +1.0 μA

−100 −65 −40 μA

Rev. 0 | Page 6 of 28

ADA4950-1/ADA4950-2

ABSOLUTE MAXIMUM RATINGS

Table 7.

Parameter Rating

Supply Voltage 11 V Power Dissipation See Figure 4 Input Current, +INx, −INx, PD

±5 mA Storage Temperature Range −65°C to +125°C Operating Temperature Range

ADA4950-1 −40°C to +105°C

ADA4950-2 −40°C to +105°C Lead Temperature (Soldering, 10 sec) 300°C Junction Temperature 150°C

The power dissipated in the package (P cent power dissipation and the power dissipated in the package due to the load drive. The quiescent power is the voltage between the supply pins (V dissipated due to the load drive depends upon the particular application. The power dissipated due to the load drive is calculated by multiplying the load current by the associated voltage drop across the device. RMS voltages and currents must be used in these calculations.

Airflow increases heat dissipation, effectively reducing θ addition, more metal directly in contact with the package leads/

exposed pad from metal traces, through holes, ground, and Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

THERMAL RESISTANCE

θJA is specified for the device (including exposed pad) soldered to a high thermal conductivity 2s2p printed circuit board, as

power planes reduces θ

Figure 4 shows the maximum safe power dissipation in the

package vs. the ambient temperature for the single 16-lead

LFCSP (91°C/W) and the dual 24-lead LFCSP (65°C/W) on

a JEDEC standard 4-layer board with the exposed pad soldered

to a PCB pad that is connected to a solid plane.

3.5

3.0

2.5

described in EIA/JESD51-7.

2.0

Table 8. Thermal Resistance

Package Type θJA θJC Unit

ADA4950-1, 16-Lead LFCSP (Exposed Pad) 91 28 °C/W ADA4950-2, 24-Lead LFCSP (Exposed Pad) 65 16 °C/W

MAXIMUM POWER DISSIPATION

The maximum safe power dissipation in the ADA4950-x package is limited by the associated rise in junction temperature (T the die. At approximately 150°C, which is the glass transition

) on

J

1.5

1.0

MAXIMUM POWER DISSIPATI ON (W)

0.5

0

–40 –20 0 20 40

Figure 4. Maximum Power Dissipation vs. Ambient Temperature

temperature, the plastic changes its properties. Even temporarily exceeding this temperature limit can change the stresses that the package exerts on the die, permanently shifting the parametric

ESD CAUTION

performance of the ADA4950-x. Exceeding a junction temperature of 150°C for an extended period can result in changes in the silicon devices, potentially causing failure.

) times the quiescent current (IS). The power

S

.

JA

ADA4950-1

AMBIENT TEM PE RATURE (°C)

for a 4-Layer Board

) is the sum of the quies-

D

JA

ADA4950-2

60 80 100

. In

07957-004

Rev. 0 | Page 7 of 28

ADA4950-1/ADA4950-2

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

1 2 3

ADA4950-2

4 5 6

1

–VS1–VS1+INB1

+INA

21

22

23

24

PIN 1 INDICATOR

TOP VIEW

(Not to Scale)

9

7

8

10

S2

+V

–INA2

–INB2

PD1

–OUT1

20

19

18

+OUT1

17

V

OCM1

16

–V

S2

–V

15

S2

14

PD2

13

–OUT2

11

12

OCM2

V

+OUT2

07957-006

S

–V

14

13

15

16

PIN 1 INDICAT OR

1+INB

2+INA

ADA4950-1

TOP VIEW

3–INA

(Not to Scale)

4–INB

5

6

S

+V

NOTES

1. SOLDER THE EXPOSED PADDLE ON THE BACK OF THE PACKAGE TO A GROUND PLANE O R TO A POWER PLANE.

12 PD

11 –OUT

10 +OUT

9V

OCM

8

7

S

+V

Figure 5. ADA4950-1 Pin Configuration

07957-005

–INA1 –INB1

+V

S1

+V

S1

+INB2 +INA2

NOTES

1. SOLDER THE E XPOSED PADDLE ON THE BACK OF THE PACKAGE TO A GROUND PLANE O R TO A POWE R PLANE.

Figure 6. ADA4950-2 Pin Configuration

Table 9. ADA4950-1 Pin Function Descriptions

Pin No. Mnemonic Description

1 +INB Positive Input B, 250 Ω Input. Use alone for G = 2 or tie to +INA for G = 3. 2 +INA Positive Input A, 500 Ω Input. Use alone for G = 1 or tie to +INB for G = 3. 3 −INA Negative Input A, 500 Ω Input. Use alone for G = 1 or tie to −INB for G = 3. 4 −INB Negative Input B, 250 Ω Input. Use alone for G = 2 or tie to −INA for G = 3. 5 to 8 +VS Positive Supply Voltage. 9 V

Output Common-Mode Voltage.

OCM

10 +OUT Positive Output. 11 −OUT Negative Output. 12

PD

Power-Down Pin.

13 to 16 −VS Negative Supply Voltage. 17 (EPAD) Exposed Paddle (EPAD) Solder the exposed paddle on the back of the package to a ground plane or to a power plane.

Table 10. ADA4950-2 Pin Function Descriptions

Pin No. Mnemonic Description

1 −INA1 Negative Input A, Amplifier 1, 500 Ω Input. Use alone for G = 1 or tie to –INB1 for G = 3. 2 −INB1 Negative Input B, Amplifier 1, 250 Ω Input. Use alone for G = 2 or tie to –INA1 for G = 3. 3, 4 +VS1 Positive Supply Voltage, Amplifier 1. 5 +INB2 Positive Input B, Amplifier 2, 250 Ω Input. Use alone for G = 2 or tie to +INA2 for G = 3. 6 +INA2 Positive Input A, Amplifier 2, 500 Ω Input. Use alone for G = 1 or tie to +INB2 for G = 3. 7 −INA2 Negative Input A, Amplifier 2, 500 Ω Input. Use alone for G = 1 or tie to –INB2 for G = 3. 8 −INB2 Negative Input B, Amplifier 2, 250 Ω Input. Use alone for G = 2 or tie to –INA2 for G = 3. 9, 10 +VS2 Positive Supply Voltage, Amplifier 2. 11 V

Output Common-Mode Voltage, Amplifier 2.

OCM2

12 +OUT2 Positive Output, Amplifier 2. 13 −OUT2 Negative Output, Amplifier 2. 14

PD2

Power-Down Pin, Amplifier 2.

15, 16 −VS2 Negative Supply Voltage, Amplifier 2. 17 V

Output Common-Mode Voltage, Amplifier 1.

OCM1

18 +OUT1 Positive Output, Amplifier 1. 19 −OUT1 Negative Output, Amplifier 1. 20

PD1

Power-Down Pin, Amplifier 1. 21, 22 −VS1 Negative Supply Voltage, Amplifier 1. 23 +INB1 Positive Input B, Amplifier 1, 250 Ω Input. Use alone for G = 2 or tie to +INA1 for G = 3. 24 +INA1 Positive Input A, Amplifier 1, 500 Ω Input. Use alone for G = 1 or tie to +INB1 for G = 3. 25 (EPAD) Exposed Paddle (EPAD) Solder the exposed paddle on the back of the package to a ground plane or to a power plane.

Rev. 0 | Page 8 of 28

ADA4950-1/ADA4950-2

TYPICAL PERFORMANCE CHARACTERISTICS

TA = 25°C, +VS = 5 V, −VS = −5 V, V for test setup. Refer to Figure 52 for signal definitions.

2

V

OUT, dm

G = 1, R G = 2, R G = 3, R

= 100mV p-p

= 53.6Ω

T

= 57.6Ω

T

= 61.9Ω

T

10 100

FREQUENCY ( MHz)

1

0

–1

–2

–3

–4

–5

–6

NORMALIZED CLOSED-L OOP GAIN (dB)

–7

–8

1

Figure 7. Small-Signal Frequency Response for Various Gains

= 0 V, G = 1, RT = 53.6 Ω (when used), R

OCM

1000

07957-007

= 1 kΩ, unless otherwise noted. Refer to Figure 49

L, dm

2

V

OUT, dm

G = 1, R G = 2, R G = 3, R

= 2V p-p

= 53.6Ω

T

= 57.6Ω

T

= 61.9Ω

T

10 100 1000

FREQUENCY ( MHz)

1

0

–1

–2

–3

–4

–5

–6

NORMALIZED CLOSED-L OOP GAIN (dB)

–7

–8

1

Figure 10. Large-Signal Frequency Response for Various Gains

07957-010

2

V

OUT, dm

VS= ±5V V

S

= 100mV p-p

= ±2.5V

10 100

FREQUENCY ( MHz)

1000

1

0

–1

–2

–3

–4

–5

CLOSED-LOOP GAIN (dB)

–6

–7

–8

1

Figure 8. Small-Signal Frequency Response for Various Supplies

2

V

OUT, dm

TA = –40°C T T

= 100mV p-p

= +25°C

A

= +105°C

A

10 100

FREQUENCY ( MHz)

1000

1

0

–1

–2

–3

–4

–5

CLOSED-LOOP GAIN (dB)

–6

–7

–8

1

Figure 9. Small-Signal Frequency Response for Various Temperatures

2

V

OUT, dm

V

S

V

S

= 2V p-p

= ±5V = ±2.5V

10 100 1000

FREQUENCY ( MHz)

07957-011

1

0

–1

–2

–3

–4

–5

CLOSED-LOOP GAIN (dB)

–6

–7

07957-008

–8

1

Figure 11. Large-Signal Frequency Response for Various Supplies

2

V

OUT, dm

T

A

T

A

T

A

= 2V p-p

= –40°C = +25°C = +105°C

10 100 1000

FREQUENCY ( MHz)

07957-012

1

0

–1

–2

–3

–4

–5

CLOSED-LOOP GAIN (dB)

–6

–7

07957-009

–8

1

Figure 12. Large-Signal Frequency Response for Various Temperatures

Rev. 0 | Page 9 of 28

ANALOG DEVICES ADA4950-1, ADA4950-2 Service Manual

FEATURES

APPLICATIONS

GENERAL DESCRIPTION

FUNCTIONAL BLOCK DIAGRAMS

TABLE OF CONTENTS

REVISION HISTORY

SPECIFICATIONS

±5 V OPERATION

General Performance

5 V OPERATION

General Performance

ABSOLUTE MAXIMUM RATINGS

THERMAL RESISTANCE

MAXIMUM POWER DISSIPATION

ESD CAUTION

PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS

TYPICAL PERFORMANCE CHARACTERISTICS