TMC2192 datasheet(63/69 Pages) CADEKA

63 / 69 page

PRODUCT SPECIFICATION

TMC2192

REV. 1.0.0 8/13/03

System Performance Characteristics

Notes:

1. TTL input levels are 0.0 and 3.0 Volts, 10%-90% rise and fall times <3 ns.

2. Analog CLOAD <10 pF, D7-0 load <40 pF.

Parameter

Conditions

Min.

Typ.

Max.

Units

RES

D/A Converter Resolution

Bits

ELI

Integral Linearity Error

0.25

ELD

Differential Linearity Error

(monotonic)

0.10

Gain Error

±7.5

%FS

Differential Phase

PXCK = 27.00 MHz,40 IRE Ramp

0.5

degree

Differential Gain

PXCK = 27.00 MHz,40 IRE Ramp

0.9

SKEW

CHROMA to LUMA Output

Skew

PSRR

Power Supply Rejection

Ratio

f=1kHz

0.5

%/%VDD

Applications Discussion

The suggested output reconstruction ﬁlter is shown in Figure

29. The phase and frequency response for the encoder and

the reconstruction ﬁlter is shown in Figure 30.

Figure 28. Typical Analog Reconstruction Filter

Figure 29. Overall Response

The circuit in Figure 31 shows the connection of power sup-

ply voltages, output reconstruction ﬁlters and the external

voltage reference. All VDD pins should be connected to the

same power source.

The full-scale output voltage level for each D/A:

VOUTx = IOUTx x RLx = K x IREFx x RLx

= K x (VREF/RREFx) x RLx

where:

•IOUTx is the full-scale output current sourced by the D/A

converter.

•RLx is the resistive load on the D/A output pin.

• K is a constant for the TMC2192 D/A converters (approx-

imately equal to 34).

•IREFx is the reference current ﬂowing out of the RREFx

pin to ground.

•VREF is the voltage measured on the VREF pin.

•RREFx is the total resistance connected between the

RREFx pin and ground.

The reference voltage in Figure 31 is from an LM185 1.2

Volt band-gap reference. The suggested trim is designed to

give

±10% of trim around 5K Ohms. This RREFx sets the

"gain" for that D/A converter. Varying RREFx

±10% will

cause the full-scale output voltage on the D/A to vary by

±10%.

An alternative output reconstruction ﬁlter is the Microelec-

tronic Modules Corp. ST-163E, which contains 4 indepen-

dent reconstruction ﬁlter. The phase and frequency response

of this ﬁlter is shown in the Output Low-Pass Filters Section

of this data sheet.

A_IN

A_OUT

Ω

330pF

27pF

100pF

Ω

1.0

µH

65-6294-31

DIODE

SCHOTTKY

L5 1.8

µH

DIODE

SCHOTTKY

65-6294-32

Frequency (MHz)

-10

-20

-30

-40

180

270

360

TMC2192 датащи(PDF) 63 Page - Cadeka Microcircuits LLC.

TMC2192 датащи(HTML) 63 Page - Cadeka Microcircuits LLC.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69

датащи скачать

ссылки URL