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Differential
Receive noise (see Note 12)
Inputs grounded, gain = 1
TLC32040M
ANALOG INTERFACE CIRCUIT
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
4–16
operating characteristics over recommended operating free-air temperature range, V
CC+
= 5 V,
V
CC–
= –5 V, V
DD
= 5 V
noise (measurement includes low-pass and band-pass switched-capacitor filters)
PARAMETER
Single ended
Transmit noise
TEST CONDITIONS
TYP
200
300
MAX
UNIT
μ
V rms
μ
V rms
dBrnc0
μ
V rms
dBrnc0
DX input = 00000000000000, constant input code
500
20
300
20
475
NOTE 12. This noise is referred to the input with a buffer gain of one. If the buffer gain is two or four, the noise figure will be correspondingly reduced.
The noise is computed by statistically evaluating the digital output of the A/D converter.
timing requirements
serial port recommended input signals
PARAMETER
MIN
100
MAX
192
10
10
58%
UNIT
ns
ns
ns
tc(MCLK) Master clock cycle time
tr(MCLK)
Master clock rise time
tf(MCLK)
Master clock fall time
Master clock duty cycle
RESET pulse duration (see Note 13)
tsu(DX)
DX setup time before SCLK
↓
th(DX)
DX hold time before SCLK
↓
NOTE 13. RESET pulse duration is the amount of time that the reset pin is held below 0.8 V after the power supplies have reached their
recommended values.
42%
800
28
ns
ns
ns
tc(SCLK)/4
serial port – AIC output signals
PARAMETER
MIN
400
TYP
MAX
UNIT
ns
ns
ns
tc(SCLK)
tf(SCLK)
tr(SCLK)
Shift clock (SCLK) cycle time
Shift clock (SCLK) fall time
Shift clock (SCLK) rise time
Shift clock (SCLK) duty cycle
Delay from SCLK
↑
to FSR/FSX
↓
Delay from SCLK
↑
to FSR/FSX
↑
DR valid after SCLK
↑
Delay from SCLK
↑
to EODX/EODR
↓
in WORD mode
Delay from SCLK
↑
to EODX/EODR
↑
in WORD mode
EODX fall time
EODR fall time
Delay from SCLK
↑
to EODX/EODR
↓
in BYTE mode
Delay from SCLK
↑
to EODX/EODR
↑
in BYTE mode
Delay from MSTR CLK
↑
to SCLK
↓
Delay from MSTR CLK
↑
to SCLK
↓
All typical values are at TA = 25
°
C.
50
50
50%
td(CH-FL)
td(CH-FH)
td(CH-DR)
tdw(CH-EL)
tdw(CH-EH)
tf(EODX)
tf(EODR)
tdb(CH-EL)
tdb(CH-EH)
td(MH-SL)
td(MH-SH)
260
260
316
280
280
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
15
15
100
100
65
65
105