TLC32046CFN Datasheet, PDF (36/56 Pages) Texas Instruments – Wide-Band Analog Interface Circuit

3.4 Operating Characteristics Over Recommended Operating Free-Air
Temperature Range, V_CC+ = 5 V, V_CC– = –5 V, V_DD = 5 V
3.4.1 Receive and Transmit Noise (measurement includes low-pass and band-pass
switched-capacitor filters)
PARAMETER
TEST CONDITIONS
MIN TYP^† MAX UNIT
Broadband with (sin x)/x
250 500
Broadband without (sin x)/x
200 450
0 to 30 kHz with (sin x)/x
200 400
0 to 30 kHz without (sin x)/x
200 400
Transmit
noise
0 to 3.4 kHz with (sin x)/x
0 to 3.4 kHz without (sin x)/x
0 to 6.8 kHz with (sin x)/x
(wide-band operation with 7.2 kHz
roll-off)
DX input = 00000000000000,
Constant input code
180 300
160 300 _µVrms
180 350
0 to 6.8 kHz without (sin x)/x
(wide-band operation with 7.2 kHz
roll-off)
160 350
Receive noise (see Note 10)
300
Inputs grounded, Gain = 1
18
† _{All typical values are at TA = 25°C.}
NOTE 10: The noise is computed by statistically evaluating the digital output of the A/D converter.
500 µVrms
dBrnc0
3.5 Timing Requirements
3.5.1 Serial Port Recommended Input Signals, TLC32046C and TLC32046I
PARAMETER
MIN
MAX UNIT
tc(MCLK)
tr(MCLK)
tf(MCLK)
Master clock cycle time
Master clock rise time
Master clock fall time
Master clock duty cycle
95
25%
ns
10 ns
10 ns
75%
RESET pulse duration (see Note 11)
800
ns
tsu(DX)
DX setup time before SCLK↓
20
ns
th(DX)
DX hold time after SCLK↓
tc(SCLK)/4
ns
NOTE 11: RESET pulse duration is the amount of time that the RESET is held below 0.8 V after the power supplies have
reached their recommended values.
3.5.2 Serial Port Recommended Input Signals, TLC32046M
PARAMETER
MIN
TYP^† MAX UNIT
tc(MCLK)
tr(MCLK)
tf(MCLK)
Master clock cycle time
Master clock rise time
Master clock fall time
Master clock duty cycle
95
ns
10
ns
10
ns
50%
RESET pulse duration (see Note 11)
800
ns
tsu(DX)
th(DX)
DX setup time before SCLK↓
DX hold time after SCLK↓
28
ns
tc(SCLK)/4
ns
NOTE 11: RESET pulse duration is the amount of time that the RESET is held below 0.8 V after the power supplies have
reached their recommended values.
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