Intersil Corporation HA2425, HA-2420 Datasheet

5-1

November 1996

HA-2420, HA-2425

3.2µs Sample and Hold Amplifiers

Features

• Maximum Acquisition Time

- 10V Step to 0.1%. . . . . . . . . . . . . . . . . . . . . 4µs (Max)

- 10V Step to 0.01%. . . . . . . . . . . . . . . . . . . . 6µs (Max)

• Low Droop Rate (C

H

= 1000pF). . . . . . . . 5µV/ms (Typ)

• Gain Bandwidth Product . . . . . . . . . . . . . 2.5MHz (Typ)

• Low Effective Aperture Delay Time . . . . . . . 30ns (Typ)

• TTL Compatible Control Input

• ±12V to ±15V Operation

Applications

• 12-Bit Data Acquisition

• Digital to Analog Deglitcher

• Auto Zero Systems

• Peak Detector

• Gated Operational Amplifier

Description

The HA-2420 and HA-2425 is a monolithic circuit consisting
of a high performance operational amplifier with its output in
series with an ultra-low leakage analog switch and JFET
input unity gain amplifier.

With an external hold capacitor connected to the switch output,
a versatile, high performance sample-and-hold or track-and­hold circuit is formed. When the switch is closed, the device
behaves as an operational amplifier , and an y of the standard op
amp feedback networks may be connected around the device
to control gain, frequency response, etc. When the switch is
opened the output will remain at its last level.

Performance as a sample-and-hold compares very favorably
with other monolithic, hybrid, modular, and discrete circuits.
Accuracy to better than 0.01% is achievable over the
temperature range. Fast acquisition is coupled with superior
droop characteristics, even at high temperatures. High slew
rate, wide bandwidth, and low acquisition time produce
excellent dynamic characteristics. The ability to operate at
gains greater than 1 frequently eliminates the need for
external scaling amplifiers.

The device may also be used as a versatile operational
amplifier with a gated output for applications such as analog
switches, peak holding circuits, etc. For more information,
please see Application Note AN517.

The MIL-STD-883 data sheet for this device is available on
request.

Pinouts

Ordering Information

PART NUMBER

TEMP.

RANGE (oC) PACKAGE

PKG.

NO.

HA1-2420-2 -55 to 125 14 Ld CERDIP F14.3
HA1-2425-5 0 to 75 14 Ld CERDIP F14.3
HA3-2425-5 0 to 75 14 Ld PDIP E14.3
HA4P2425-5 0 to 75 20 Ld PLCC N20.35
HA9P2425-5 0 to 75 14 Ld SOIC M14.15

HA-2420 (CERDIP)

HA-2425 (CERDIP, PDIP, SOIC)

TOP VIEW

HA-2425

(PLCC)

TOP VIEW

-IN

+IN
OFFSET ADJ.
OFFSET ADJ.

V-

NC

OUTPUT

S/H CONTROL
GND
NC
HOLD CAP.
NC
V+
NC

1
2
3
4
5
6
7

14
13
12
11
10

9
8

GND

NC

NC

NC

OFFSET ADJ.

NC

OFFSET ADJ.

NC

NC

OUT

NC

NC

NC

HOLD CAP.

V+

-IN

+IN

V-

S/H

NC

193 2 201

15

16

17

18

14

9

10 11 12 13

4
5
6

7
8

File Number 2856.2

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Copyright © Intersil Corporation 1999

5-2

Absolute Maximum Ratings Thermal Information

Voltage Between V+ and V- Terminals. . . . . . . . . . . . . . . . . . . . 40V

Differential Input Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24V

Digital Input Voltage (Sample and Hold Pin) . . . . . . . . . . +8V, -15V

Output Current . . . . . . . . . . . . . . . . . . . . . . . Short Circuit Protected

Operating Conditions

Temperature Range

HA-2420-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55oC to 125oC

HA-2425-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to 75oC

Supply Voltage Range (Typical) . . . . . . . . . . . . . . . . . ±12V to ±15V

Thermal Resistance (Typical, Note 1) θJA (oC/W) θJC (oC/W)

CERDIP Package . . . . . . . . . . . . . . . . . . 90 35

PDIP Package. . . . . . . . . . . . . . . . . . . . . 100 N/A

PLCC Package . . . . . . . . . . . . . . . . . . . . 75 N/A

SOIC Package. . . . . . . . . . . . . . . . . . . . . 120 N/A

Maximum Junction Temperature (Ceramic Packages) . . . . . . . 175oC

Maximum Junction Temperature (Plastic Package) . . . . . . . . 150oC

Maximum Storage Temperature Range . . . . . . . . . -65oC to 150oC

Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300oC

(PLCC and SOIC - Lead Tips Only)

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTE:

1. θJA is measured with the component mounted on an evaluation PC board in free air.

Electrical Specifications Test Conditions (Unless Otherwise Specified) V

SUPPLY

= ±15.0V; CH = 1000pF; Digital Input: VIL= +0.8V

(Sample), VIH = +2.0V (Hold), Unity Gain Configuration (Output tied to Negative Input)

PARAMETER

TEST

CONDITIONS

TEMP.

(

o

C)

HA-2420-2 HA-2425-5

UNITSMIN TYP MAX MIN TYP MAX

INPUT CHARACTERISTICS

Input Voltage Range Full ±10 - - ±10 - - V
Offset Voltage 25 - 2 4 - 3 6 mV

Full - 3 6 - 4 8 mV

Bias Current 25 - 40 200 - 40 200 nA

Full - - 400 - - 400 nA

Offset Current 25 - 10 50 - 10 50 nA

Full - - 100 - - 100 nA
Input Resistance 25 5 10 - 5 10 - MΩ
Common Mode Range Full ±10 - - ±10 - - V

TRANSFER CHARACTERISTICS

Large Signal Voltage Gain RL = 2kΩ, VO = 20V

P-P

Full 25 50 - 25 50 - kV/V
Common Mode Rejection VCM = ±10V Full 80 90 - 74 90 - dB
Hold Mode Feedthrough Attenuation

(Note 2)

fIN≤ 100kHz Full - -76 - - -76 - dB

Gain Bandwidth Product (Note 2) 25 - 2.5 - - 2.5 - MHz

OUTPUT CHARACTERISTICS

Output Voltage Swing RL = 2kΩ Full ±10 - - ±10 - - V
Output Current 25 ±15 - - ±15 - - mA
Full Power Bandwidth (Note 2) VO = 20V

P-P

25 - 100 - - 100 - kHz

Output Resistance DC 25 - 0.15 - - 0.15 - Ω

TRANSIENT RESPONSE

Rise Time (Note 2) VO = 200mV

P-P

25 - 75 100 - 75 100 ns

Overshoot (Note 2) VO = 200mV

P-P

25 - 25 40 - 25 40 %

Slew Rate (Note 2) VO = 10V

P-P

25 3.5 5 - 3.5 5 - V/µs

DIGITAL INPUT CHARACTERISTICS

Digital Input Current VIN = 0V Full - - -0.8 - - -0.8 mA

VIN = 5V Full - - 20 - - 20 µA

Digital Input Voltage Low Full - - 0.8 - - 0.8 V

High Full 2.0 - - 2.0 - - V

SAMPLE AND HOLD CHARACTERISTICS

Acquisition Time (Note 2) To 0.1% 10V Step 25 - 2.3 4 - 2.3 4 µs

HA-2420, HA-2425

5-3

Acquisition Time (Note 2) To 0.01% 10V Step 25 - 3.2 6 - 3.2 6 µs
Hold Step Error VIN = 0V 25 - 10 20 - 10 20 mV
Hold Mode Settling Time To ±1mV 25 - 860 - - 860 - ns
Aperture Time (Note 3) 25 - 30 - - 30 - ns
Effective Aperture Delay Time 25 - 30 - - 30 - ns
Aperture Uncertainty 25 - 5 - - 5 - ns
Drift Current (Note 2) VIN = 0V 25 - 5 - - 5 - pA

HA1-2420 Full - 1.8 10 - - - nA
HA1-2425 Full - - - - 0.1 1.0 nA
HA3-2425, HA4P2425, HA9P2425 Full - - - - 7.5 10.0 nA

POWER SUPPLY CHARACTERISTICS

Supply Current (+) 25 - 3.5 5.5 - 3.5 5.5 mA
Supply Current (-) 25 - 2.5 3.5 - 2.5 3.5 mA
Power Supply Rejection Full 80 90 - 74 90 - dB

NOTES:

2. AV = ±1, RL = 2kΩ, CL = 50pF.

3. Derived from computer simulation only; not tested.

Functional Diagram

Electrical Specifications Test Conditions (Unless Otherwise Specified) V

SUPPLY

= ±15.0V; CH = 1000pF; Digital Input: VIL= +0.8V

(Sample), VIH = +2.0V (Hold), Unity Gain Configuration (Output tied to Negative Input) (Continued)

PARAMETER

TEST

CONDITIONS

TEMP.

(

o

C)

HA-2420-2 HA-2425-5

UNITSMIN TYP MAX MIN TYP MAX

43

OFFSET
ADJUST

V+

9

13 5

14

2

1

CONTROL

S/H

+INPUT

-INPUT

GND V-

HA-2420/2425

7

OUT

11

HOLD

CAPACITOR

+

-

+

-

Test Circuits and Waveforms

FIGURE 1. HOLD STEP ERROR AND DRIFT CURRENT FIGURE 2. HOLD STEP ERROR TEST

-IN

+IN

S/H

CONTROL

OUTPUT

INPUT

S/H CONTROL
INPUT

HOLD

CAP

GND

C

H

S/H

OUTPUT

CONTROL

V

STEP

HOLD

SAMPLE

NOTE: Set rise/fall times of S/H Control to approximately 20ns.

HA-2420, HA-2425