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| 型號(hào)： | TPS65920BZCHR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PBGA139 |
| 封裝： | 10 X 10 MM, 0.65 MM PITCH, GREEN, PLASTIC, NFBGA-139 |
| 文件頁(yè)數(shù)： | 93/115頁(yè) |
| 文件大?。?/td> | 1232K |
| 代理商： | TPS65920BZCHR |
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SWCS037G
– MAY 2008 – REVISED APRIL 2011
8.3
Channel Voltage Input Range
Table 8-2 lists the analog input voltage minimum and maximum values.
Table 8-2. Analog Input Voltage Range
Channel
Min
Typ
Max
Unit
Prescaler
No prescaler
ADIN0: General-purpose input
0
1.5
V
DC current source for battery identification through external
resistor (10
μA typical)
ADIN2: General-purpose input(1)
0
2.5
V
Prescaler in the MADC to be in range 0 to
>1.5 V
(1)
General-purpose inputs must be tied to ground when TPS65920/TPS65930 internal power supplies (VINTANA1 and VINTANA2) are off.
8.3.1
Sequence Conversion Time (Real-Time or Nonaborted Asynchronous)
Table 8-3 lists the sequence conversion timing characteristics.
Table 8-3. Sequence Conversion Timing Characteristics
Parameter
Comments
Min
Typ
Max
Unit
F
Running frequency
1
MHz
T = 1/F
Clock period
1
μs
N
Number of analog inputs to convert in a single sequence
0
2
Tstart
SW1, SW2, or USB asynchronous request or real-time STARTADC
3
4
μs
request
Tsettling time
Settling time to wait before sampling a stable analog input (capacitor
5
12
20
μs
bank charge time)
Tsettling is calculated from the max((Rs + Ron)*Cbank) of the two
possible input sources (internal or external). Ron is the resistance of the
selection analog input switches (5 k
). This time is
software-programmable by the open-core protocol (OCP) register.
Tstartsar
The successive approximation registers ADC start time
1
μs
Tadc time
The successive approximation registers ADC conversion time
10
μs
Tcapture time
Tcapture time is the conversion result capture time.
2
μs
Tstop
1
2
μs
Full-conversion
One channel (N = 1)(1)
22
39
μs
sequence time
Both channels(1)
352
624
Without Tstart and Tstop: One channel (N = 1)(1)
18
33
Conversion sequence
μs
time
Without Tstart and Tstop: Both channels(1)
288
528
STARTADC pulse
STARTADC period is T.
0.33
24
μs
duration
(1)
Total sequence conversion time general formula: Tstart+N*(1+Tsettling+Tadc+Tcapture) +Tstop
Copyright
2008–2011, Texas Instruments Incorporated
MADC
79
focus.ti.com: TPS65930/TPS65920
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