ST RHF330 User Manual

RHF330

Rad-hard 1 GHz low noise operational amplifier

Preliminary data

Features

■ Bandwidth: 1 GHz (gain = +2)

■ Slew rate: 1800 V/μs

■ Input noise: 1.3 nV/√ Hz

■ Distortion: SFDR = -78 dBc (10 MHz, 2 V

■ 100 Ω load optimized output stage

■ 5 V power supply

■ 300 krad MIL-STD-883 1019.7 ELDRS free

pp

compliant

■ SEL immune at 125° C, LET up to

110 MEV.cm

■ SET characterized, LET up to

110 MEV.cm

■ QMLV qualified under SMD 5962-0723101

■ Mass: 0.45 g

2

2

/mg

/mg

Applications

■ Communication satellites

■ Space data acquisition systems

■ Aerospace instrumentation

■ Nuclear and high energy physics

■ Harsh radiation environments

■ ADC drivers

Table 1. Device summary

Pin connections

(top view)

1

NC

)

IN -

IN +

-VCC

4

8

NC

+VCC

OUT

NC

5

Description

The RHF330 is a current feedback operational
amplifier that uses very high-speed
complementary technology to provide a large
bandwidth of 1 GHz in gains of 2 while drawing
only 16.6 mA of quiescent current. The RHF330
also offers 0.1 dB gain flatness up to 160 MHz
with a gain of 2. With a slew rate of 1800 V/µs and
an output stage optimized for standard 100 Ω
loads, this device is highly suitable for
applications where speed and low distortion are
the main requirements. The device is a single
operator available in a Flat-8 hermetic ceramic
package, saving board space as well as providing
excellent thermal and dynamic performance.

Order code SMD pin Quality level Package Lead finish Marking EPPL Packing

- Engineering model Flat-8 Gold RHF310K1 - Strip pack

RHF330K1

RHF330K-01V

5962F0723101VXC QMLV-Flight Flat-8 Gold 5962F0723101VXC Target Strip pack

Note: Contact your ST sales office for information on the specific conditions for products in die form and

QML-Q versions.

May 2010 Doc ID 15576 Rev 3 1/22

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.

www.st.com

22

Contents RHF330

Contents

1 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 3

2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Demonstration board schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4 Power supply considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.1 Single power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5 Noise measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

5.1 Measurement of the input voltage noise eN . . . . . . . . . . . . . . . . . . . . . . . 15

5.2 Measurement of the negative input current noise iNn . . . . . . . . . . . . . . . 15

5.3 Measurement of the positive input current noise iNp . . . . . . . . . . . . . . . . 15

6 Intermodulation distortion product . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

7 Bias of an inverting amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

8 Active filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

9 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

2/22 Doc ID 15576 Rev 3

RHF330 Absolute maximum ratings and operating conditions

1 Absolute maximum ratings and operating conditions

Table 2. Absolute maximum ratings

Symbol Parameter Value Unit

V

CC

V

id

V

in

T

stg

T

R

thja

R

thjc

P

max

ESD

Supply voltage

Differential input voltage

Input voltage range

Storage temperature -65 to +150 °C

Maximum junction temperature 150 °C

j

Flat-8 thermal resistance junction to ambient 50 °C/W

Flat-8 thermal resistance junction to case 30 °C/W

Flat-8 maximum power dissipation
(T

= + 25° C) for Tj=150°C

amb

HBM: human body model

pins 1, 4, 5, 6, 7 and 8
pins 2 and 3

MM: machine model

pins 1, 4, 5, 6, 7 and 8
pins 2 and 3

CDM: charged device model

pins 1, 4, 5, 6, 7 and 8
pins 2 and 3

Latch-up immunity 200 mA

(1)

(3)

(6)

6V

(2)

± 0.5 V

± 2.5 V

(4)

(5)

830 mW

2

kV

0.6

200

V

80

(7)

1.5

kV

1

1. All voltage values are measured with respect to the ground pin.

2. Differential voltage is the non-inverting input terminal with respect to the inverting input terminal.

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

4. Short-circuits can cause excessive heating. Destructive dissipation can result from short-circuits on all
amplifiers.

5. Human body model: a 100 pF capacitor is charged to the specified voltage, then discharged through a

1.5 kΩ resistor between two pins of the device. This is done for all couples of connected pin combinations
while the other pins are floating.

6. This is a minimum value.
Machine model: a 200 pF capacitor is charged to the specified voltage, then discharged directly between
two pins of the device with no external series resistor (internal resistor < 5Ω). This is done for all couples of
connected pin combinations while the other pins are floating.

7. Charged device model: all pins and package are charged together to the specified voltage and then
discharged directly to ground through only one pin.

Table 3. Operating conditions

Symbol Parameter Value Unit

V

V

T

amb

1. Tj must never exceed +150°C. P = (Tj - Tamb)/Rthja = (Tj - Tcase)/Rthjc with P being the power that the
RHF330 must dissipate in the application.

Supply voltage 4.5 to 5.5 V

CC

Common-mode input voltage -V

icm

Operating free-air temperature range

(1)

+1.5 to +VCC-1.5 V

CC

-55 to +125 °C

Doc ID 15576 Rev 3 3/22

Electrical characteristics RHF330

2 Electrical characteristics

Table 4. Electrical characteristics for VCC= ±2.5 V, T

amb

=+25°C

(unless otherwise specified)

Symbol Parameter Test conditions Temp. Min. Typ. Max. Unit

DC performance

+125°C -3.1 +3.1

V

io

I

ib+

I

ib-

CMR

SVR

Input offset voltage

Non-inverting input bias
current

Inverting input bias current

Common mode rejection ratio
20 log (ΔV

/ΔVio)

ic

Supply voltage rejection ratio

/ΔV

20 log (ΔV

CC

out

)

ΔVic = ±1 V

ΔVCC= 3.5 V to 5 V

-55°C -3.1 +3.1

+125°C 55

-55°C 55

+125°C 34

-55°C 34

+125°C 48

-55°C 48

+125°C 45

-55°C 45

mV+25°C -3.1 0.18 +3.1

μA+25°C 26 55

μA+25°C 7 22

dB+25°C 48 54

dB+25°C 60 74

PSRR

I

CC

Power supply rejection ratio
20 log (ΔVCC/ΔV

out

)

Supply current No load

=200mVpp at

ΔV

CC

1kHz

Dynamic performance and output characteristics

R

Transimpedance ΔV

OL

= ±1 V, RL = 100 Ω

out

V

=20mVpp

out

RL = 100 Ω, AV = +2

-3 dB bandwidth

Bw

Gain flatness at 0.1 dB

=20mV

V

out

AV = +2, RL = 100 Ω

4/22 Doc ID 15576 Rev 3

+25°C 56 dB

+125°C 20.2

mA+25°C 16.6 20.2

-55°C 20.2

+125°C 85

kΩ+25°C 104 153

-55°C 85

+25°C 1000

+125°C 400

+25°C 400 630

MHzRL = 100 Ω, AV = -4

-55°C 400

pp

+25°C 160

RHF330 Electrical characteristics

Table 4. Electrical characteristics for VCC= ±2.5 V, T

amb

=+25°C

(unless otherwise specified) (continued)

Symbol Parameter Test conditions Temp. Min. Typ. Max. Unit

= 2 Vpp,

V

SR Slew rate

V

V

High level output voltage RL = 100 Ω

OH

Low level output voltage RL = 100 Ω

OL

(1)

I

sink

I

out

(2)

I

source

Output to GND

Noise and distortion

out

= +2, RL = 100 Ω

A

V

Output to GND

+25°C 1800 V/μs

+125°C 1.35

+25°C 1.5 1.64

-55°C 1.35

+125°C -1.35

+25°C -1.55 -1.5

-55°C -1.35

+125°C 360

+25°C 360 453

-55°C 360

+125°C -320

+25°C -320 -400

-55°C -320

V

V

mA

eN

Equivalent input noise

(3)

voltage

Equivalent positive input noise

(3)

current

F = 100 kHz +25°C 1.3 nV/√ Hz

F = 100 kHz +25°C 22 pA/√ Hz

iN

Equivalent negative input
noise current

(3)

F = 100 kHz +25°C 16 pA/√ Hz

AV = +2, V

= 100 Ω

R

L

F = 10 MHz +25°C -78

SFDR Spurious free dynamic range

F = 20 MHz +25°C -73

F = 100 MHz +25°C -48

F = 150 MHz +25°C -37

1. See Figure 11 for more details.

2. See Figure 10 for more details.

3. See Chapter 5 on page 14.

Table 5. Closed-loop gain and feedback components

Gain (V/V) + 1 1 + 2- 2+ 4- 4+ 10- 10

R

(Ω) 300 270 300 270 240 240 200 200

fb

= 2 Vpp,

out

dBc

Doc ID 15576 Rev 3 5/22

Electrical characteristics RHF330

-2ns -1ns 0s 1ns 2ns

0.00

0.25

0.50

0.75

1.00

1.25

1.50

1.75

2.00

Gain=+2
Vcc=+5V
Load=100

Ω

Output Response (V)

Time (ns)

Figure 1. Frequency response, positive gain Figure 2. Flatness, gain = +2 compensated

24
22
20
18
16
14
12
10

8
6
4

Gain (dB)

2
0

-2

-4

Small Signal

-6

Vcc=5V

-8

Load=100

-10
1M 10M 100M 1G

Gain=10

Gain=4

Gain=2

Gain=1

Ω

Frequency (Hz)

6.5

Vin

6.4

0.5pF

6.3

6.2

Gain=+2, Vcc=+5V,
Small Signal

6.1

Gain (dB)

Vout

+

-

100

300

300

6.0

5.9

5.8
1M 10M 100M 1G

Frequency (Hz)

Figure 3. Flatness, gain = +4 compensated Figure 4. Flatness, gain = +10 compensated

12.2

12.1

12.0

11.9

11.8

11.7

Vin

11.6

Gain (dB)

11.5

2.7pF

11.4

11.3

Gain=+4, Vcc=+5V,
Small Signal

11.2
1M 10M 100M 1G

Vout

+

-

100

240

82

Frequency (Hz)

20.3

20.2

20.1

20.0

19.9

19.8

Vin

19.7

Gain (dB)

19.6

12pF

19.5

19.4

Gain=+10, Vcc=+5V,
Small Signal

19.3
1M 10M 100M 1G

Vout

+

-

100

200

22

Frequency (Hz)

Figure 5. Quiescent current vs. V

CC

Figure 6. Positive slew rate

20

15

10

Icc(+)

5

0

Icc (mA)

-5

-10

-15

Gain=+2
Input to ground, no load

-20

0.0 0.5 1.0 1.5 2.0 2.5

+/- Vcc (V)

Icc(-)

6/22 Doc ID 15576 Rev 3

RHF330 Electrical characteristics

Figure 7. Negative slew rate Figure 8. Output amplitude vs. load

2.00

1.75

1.50

1.25

1.00

0.75

0.50

Output Response (V)

0.25

0.00

-2ns -1ns 0s 1ns 2ns

Gain=+2
Vcc=+5V
Load=100

Ω

Time (ns)

Figure 9. Distortion vs. amplitude Figure 10. I

Gain=+2
Vcc=+5V
F=10MHz

Ω

Load=100

HD2

HD3

sink

V (V)

Figure 11. I

600

550

500

450

400

350

300

250

Isink (mA)

200

150

100

50

0

-2.0 -1.5 -1.0 -0.5 0.0

4.0

3.5

3.0

2.5

Max. Output Amplitude (Vp-p)

2.0
10 100 1k 10k 100k

Load (ohms)

source

0

-50

-100

-150

-200

-250

-300

-350

Isource (mA)

-400

-450

-500

-550

-600

0.0 0.5 1.0 1.5 2.0

V (V)

Figure 12. Noise figure

Gain=+2
Vcc=5V

Ω

Load=100

Vcc=5V

Doc ID 15576 Rev 3 7/22