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芯片资料 MLT04.rar （1个子文件）

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MLT04

FUNCTIONAL BLOCK DIAGRAM

18-Lead Epoxy DIP (P Suffix)

18-Lead Wide Body SOIC (S Suffix)

REV. B

GENERAL DESCRIPTION

The MLT04 is a complete, four-channel, voltage output analog

multiplier packaged in an 18-pin DIP or SOIC-18. These complete

multipliers are ideal for general purpose applications such as voltage

controlled amplifiers, variable active filters, “zipper” noise free

audio level adjustment, and automatic gain control. Other applica-

tions include cost-effective multiple-channel power calculations

(I × V), polynomial correction generation, and low frequency

modulation. The MLT04 multiplier is ideally suited for generating

complex, high-order waveforms especially suitable for geometry

correction in high-resolution CRT display systems.

FEATURES

Four Independent Channels

Voltage IN, Voltage OUT

No External Parts Required

8 MHz Bandwidth

Four-Quadrant Multiplication

Voltage Output; W = (X × Y)/2.5 V

0.2% Typical Linearity Error on X or Y Inputs

Excellent Temperature Stability: 0.005%

±2.5 V Analog Input Range

Operates from ±5 V Supplies

Low Power Dissipation: 150 mW typ

Spice Model Available

APPLICATIONS

Geometry Correction in High-Resolution CRT Displays

Waveform Modulation & Generation

Voltage Controlled Amplifiers

Automatic Gain Control

Modulation and Demodulation

Fabricated in a complementary bipolar process, the MLT04

includes four 4-quadrant multiplying cells which have been laser-

trimmed for accuracy. A precision internal bandgap reference

normalizes signal computation to a 0.4 scale factor. Drift over

temperature is under 0.005%/°C. Spot noise voltage of 0.3 µV/√Hz

results in a THD + Noise performance of 0.02% (LPF = 22 kHz)

for the lower distortion Y channel. The four 8 MHz channels

consume a total of 150 mW of quiescent power.

The MLT04 is available in 18-pin plastic DIP, and SOIC-18

surface mount packages. All parts are offered in the extended

industrial temperature range (–40°C to +85°C).

Figure 2. THD + Noise vs. Frequency

Figure 1. Gain & Phase vs. Frequency Response

100

0.01

10 100 1M100k10k1k

0.1

FREQUENCY – Hz

THD + NOISE – %

= +5V

= –5V

= +25°C

THDX: X = 2.5VP, Y = +2.5V DC

THDY: Y = 2.5VP, X = +2.5V DC

LPF = 500kHz

123456789181716151413121110

MLT-04

MLT04

GND4

GND3

GND1

GND2

W = (X • Y)/2.5V

Av GAIN – dB

1k 10k 100M10M1M100k

–40

–20

FREQUENCY – Hz

–90

Ø – Phase Degrees

= +5V

= –5V

= +25°C

X & Y MEASUREMENTS

SUPERIMPOSED:

X = 100mV RMS, Y = 2.5V DC

Y = 100mV RMS, X = 2.5V DC

Av (X OR Y)

Ø (X OR Y)

8.9MHz

–3dB

One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A.

Tel: 617/329-4700 Fax: 617/326-8703

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

Four-Channel, Four-Quadrant

Analog Multiplier

ORDERING INFORMATION*

Temperature Package Package

Model Range Description Option

MLT04GP –40°C to +85°C 18-Pin P-DIP N-18

MLT04GS –40°C to +85°C 18-Lead SOIC SOL-18

MLT04GS-REEL –40°C to +85°C 18-Lead SOIC SOL-18

MLT04GBC +25°C Die

*For die specifications contact your local Analog sales office. The MLT04

contains 211 transistors.

= +5 V, V

= –5 V, V

= ±2.5 V

, R

= 2 kΩ, T

= +25°C unless otherwise noted.)

–2–

MLT04–SPECIFICATIONS

Parameter Symbol Conditions Min Typ Max Units

MULTIPLIER PERFORMANCE

Total Error

–2.5 V < X < +2.5 V, Y = +2.5 V –5 ±2 5 % FS

Total Error

–2.5 V < Y < +2.5 V, X = +2.5 V –5 ±2 5 % FS

Linearity Error

XLE

–2.5 V < X < +2.5 V, Y = +2.5 V –1 ±0.2 +1 % FS

Linearity Error

YLE

–2.5 V < Y < +2.5 V, X = +2.5 V –1 ±0.2 +1 % FS

Total Error Drift TCE

X = –2.5 V, Y = 2.5 V, T

= –40°C to +85°C 0.005 %/°C

Total Error Drift TCE

Y = –2.5 V, X = 2.5 V, T

= –40°C to +85°C 0.005 %/°C

Scale Factor

K X = ±2.5 V, Y = ±2.5 V, T

= –40°C to +85°C 0.38 0.40 0.42 1/V

Output Offset Voltage Z

X = 0 V, Y = 0 V, T

= –40°C to +85°C –50 ±10 50 mV

Output Offset Drift TCZ

X = 0 V, Y = 0 V, T

= –40°C to +85°C50µV/°C

Offset Voltage, X X

X = 0 V, Y = ±2.5 V, T

= –40°C to +85°C –50 ±10.5 50 mV

Offset Voltage, Y Y

Y = 0 V, X = ±2.5 V, T

= –40°C to +85°C –50 ±10.5 50 mV

DYNAMIC PERFORMANCE

Small Signal Bandwidth BW V

OUT

= 0.1 V rms 8 MHz

Slew Rate SR V

OUT

= ±2.5 V 30 53 V/µs

Settling Time t

OUT

= ∆2.5 V to 1% Error Band 1 µs

AC Feedthrough FT

X = 0 V, Y = 1 V rms @ f = 100 kHz –65 dB

Crosstalk @ 100 kHz CT

X = Y = 1 V rms Applied to Adjacent Channel –90 dB

OUTPUTS

Audio Band Noise E

f = 10 Hz to 50 kHz 76 µV rms

Wide Band Noise E

Noise BW = 1.9 MHz 380 µV rms

Spot Noise Voltage e

f = 1 kHz 0.3 µV/√Hz

Total Harmonic Distortion THD

f = 1 kHz, LPF = 22 kHz, Y = 2.5 V 0.1 %

THD

f = 1 kHz, LPF = 22 kHz, X = 2.5 V 0.02 %

Open Loop Output Resistance R

OUT

40 Ω

Voltage Swing V

= +5 V, V

= –5 V ±3.0 ±3.3 V

Short Circuit Current I

30 mA

INPUTS

Analog Input Range IVR GND = 0 V –2.5 +2.5 V

Bias Current I

X = Y = 0 V 2.3 10 µA

Resistance R

1MΩ

Capacitance C

3pF

SQUARE PERFORMANCE

Total Square Error E

X = Y = 1 5 % FS

POWER SUPPLIES

Positive Current I

= 5.25 V, V

= –5.25 V 15 20 mA

Negative Current I

= 5.25 V, V

= –5.25 V 15 20 mA

Power Dissipation P

DISS

Calculated = 5 V × I

+ 5 V × I

150 200 mW

Supply Sensitivity PSSR X = Y = 0 V, V

= ∆5% or V

= ∆5% 10 mV/V

Supply Voltage Range V

RANGE

For V

& V

±4.75 ±5.25 V

REV. B

NOTES

Specifications apply to all four multipliers.

Error is measured as a percent of the ±2.5 V full scale, i.e., 1% FS = 25 mV.

Scale Factor K is an internally set constant in the multiplier transfer equation W = K × X × Y.

Specifications subject to change without notice.

ABSOLUTE MAXIMUM RATINGS*

Supply Voltages V

, V

to GND ±7 V

Inputs X

, Y

, V

Outputs W

, V

Operating Temperature Range –40°C to +85°C

Maximum Junction Temperature (T

max) +150°C

Storage Temperature –65°C to +150°C

Lead Temperature (Soldering, 10 sec) +300°C

Package Power Dissipation (T

max–T

)/θ

Thermal Resistance θ

PDIP-18 (N-18) 74°C/W

SOIC-18 (SOL-18) 89°C/W

*Stresses above those listed under “Absolute Maximum Ratings” may cause perma-

nent damage to the device. This is a stress rating only and functional operation of

the device at these or any other conditions above those indicated in the operational

section of this specification are not implied.

–3–

REV. B

FUNCTIONAL DESCRIPTION

The MLT04 is a low cost quad, 4-quadrant analog multiplier with

single-ended voltage inputs and voltage outputs. The functional

block diagram for each of the multipliers is illustrated in Figure 3.

Due to packaging constraints, access to internal nodes for externally

adjusting scale factor, output offset voltage, or additional summing

signals is not provided.

Figure 3. Functional Block Diagram of Each MLT04

Multiplier

Each of the MLT04’s analog multipliers is based on a Gilbert cell

multiplier configuration, a 1.23 V bandgap reference, and a unity-

connected output amplifier. Multiplier scale factor is determined

through a differential pair/trimmable resistor network external to

the core. An equivalent circuit for each of the multipliers is shown

in Figure 4.

Figure 4. Equivalent Circuit for the MLT04

Details of each multiplier’s output-stage amplifier are shown in

Figure 5. The output stages idles at 200 µA, and the resistors in

series with the emitters of the output stage are 25 Ω. The output

stage can drive load capacitances up to 500 pF without oscillation.

For loads greater than 500 pF, the outputs of the MLT04 should

be isolated from the load capacitance with a 100 Ω resistor.

Figure 5. Equivalent Circuit for MLT04 Output Stages

ANALOG MULTIPLIER ERROR SOURCES

Multiplier errors consist primarily of input and output offsets, scale

factor errors, and nonlinearity in the multiplying core. An expres-

sion for the output of a real analog multiplier is given by:

= (K +∆K){(V

+ X

)(V

+ Y

) + Z

+ f(X , Y )}

where: K = Multiplier Scale Factor

∆K = Scale Factor Error

= X-Input Signal

= X-Input Offset Voltage

= Y-Input Signal

= Y-Input Offset Voltage

= Multiplier Output Offset Voltage

ƒ(X, Y) = Nonlinearity

Executing the algebra to simplify the above expression yields

expressions for all the errors in an analog multiplier:

Term Description Dependence on Input

True Product Goes to Zero As Either or

Both Inputs Go to Zero

∆KV

Scale-Factor Error Goes to Zero at V

, V

= 0

Linear “X” Feedthrough Proportional to V

Due to Y-Input Offset

Linear “Y” Feedthrough Proportional to V

Due to X-Input Offset

Output Offset Due to X-, Independent of V

, V

Y-Input Offsets

Output Offset Independent of V

, V

ƒ(X, Y) Nonlinearity Depends on Both V

, V

Contains Terms Dependent

on V

, V

, Their Powers

and Cross Products

As shown in the table, the primary static errors in an analog

multiplier are input offset voltages, output offset voltage, scale

factor, and nonlinearity. Of the four sources of error, only two are

externally trimmable in the MLT04: the X- and Y-input offset

voltages. Output offset voltage in the MLT04 is factory-trimmed to

±50 mV, and the scale factor is internally adjusted to ±2.5% of full

scale. Input offset voltage errors can be eliminated by using the

optional trim circuit of Figure 6. This scheme then reduces the net

error to output offset, scale-factor (gain) error, and an irreducible

nonlinearity component in the multiplying core.

Figure 6. Optional Offset Voltage Trim Configuration

MLT04

OUT

25Ω

INTERNAL

BIAS

GND

OUT

22k

200µA 200µA

22k

200µA 200µA 200µA 200µA

SCALE

FACTOR

50kΩ

–V

50kΩ

±100mV

FOR X

, Y

TRIM

CONNECT TO SUM

NODE OF AN EXT OP AMP

0.4

–V

X1, X2, X3, X4

G1, G2, G3, G4

Y1, Y2, Y3, Y4

W1, W2, W3, W4

MLT04

Figure 12. Y-Input Nonlinearity @ X = –2.5 V

Feedthrough

In the ideal case, the output of the multiplier should be zero if

either input is zero. In reality, some portion of the nonzero input

will “feedthrough” the multiplier and appear at the output. This is

caused by the product of the nonzero input and the offset voltage of

the “zero” input. Introducing an offset equal to and opposite of the

“zero” input offset voltage will null the linear component of the

feedthrough. Residual feedthrough at the output of the multiplier

is then irreducible core nonlinearity.

Typical X- and Y-input feedthrough curves for the MLT04 are

shown in Figures 7 and 8, respectively. These curves illustrate

MLT04 feedthrough after “zero” input offset voltage trim.

Residual X-input feedthrough measures 0.08% of full scale,

whereas residual Y-input feedthrough is almost immeasurable.

Figure 7. X-Input Feedthrough with Y

Nulled

Figure 8. Y-Input Feedthrough with X

Nulled

Nonlinearity

Multiplier core nonlinearity is the irreducible component of error.

It is the difference between actual performance and “best-straight-

line” theoretical output, for all pairs of input values. It is expressed

as a percentage of full scale with all other dc errors nulled. Typical

X- and Y-input nonlinearities for the MLT04 are shown in Figures

9 through 12. Worst-case X-input nonlinearity measured less than

0.2%, and Y-input nonlinearity measured better than 0.06%. For

modulator/demodulator or mixer applications it is, therefore,

recommended that the carrier be connected to the X-input while

the signal is applied to the Y-input.

REV. B

Figure 10. X-Input Nonlinearity @ Y = –2.5 V

Figure 11. Y-Input Nonlinearity @ X = +2.5 V

MLT04

Figure 9. X-Input Nonlinearity @ Y = +2.5 V

100

VERTICAL – 5mV/DIV

HORIZONTAL – 0.5V/DIV

Y-INPUT: ±2.5V @ 10Hz

NULLED

= +25°C

100

VERTICAL – 5mV/DIV

HORIZONTAL – 0.5V/DIV

X-INPUT: ±2.5V @ 10Hz

Y-INPUT: +2.5V

NULLED

= +25°C

100

VERTICAL – 5mV/DIV

HORIZONTAL – 0.5V/DIV

X-INPUT: ±2.5V @ 10Hz

NULLED

= +25°C

100

VERTICAL – 5mV/DIV

HORIZONTAL – 0.5V/DIV

X-INPUT: ±2.5V @ 10Hz

Y-INPUT: –2.5V

NULLED

= +25°C

100

VERTICAL – 5mV/DIV

HORIZONTAL – 0.5V/DIV

Y-INPUT: ±2.5V @ 10Hz

X-INPUT: +2.5V

NULLED

= +25°C

100

VERTICAL – 5mV/DIV

HORIZONTAL – 0.5V/DIV

Y-INPUT: ±2.5V @ 10Hz

X-INPUT: –2.5V

NULLED

= +25°C

–4–

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