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參數(shù)資料
型號(hào): TLV1562CPWG4
廠商: TEXAS INSTRUMENTS INC
元件分類(lèi): ADC
英文描述: 4-CH 10-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28
封裝: 0.65 MM PITCH, GREEN, TSSOP-28
文件頁(yè)數(shù): 40/41頁(yè)
文件大小: 600K
代理商: TLV1562CPWG4
TLV1562
2.7 V TO 5.5 V, HIGH-SPEED LOW-POWER RECONFIGURABLE ANALOG-TO-DIGITAL
CONVERTER WITH 4-INPUT, DUAL S/H, PARALLEL INTERFACE, AND POWER DOWN
SLAS162 – SEPTEMBER 1998
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
detailed description (continued)
input signal range
The analog input signal range for a specific supply voltage AVDD ranges from (AVDD – 1.9 V) to 0.8 V.
3 V
0.8 V
2.7
4.9
5.5
AVDD (V)
VSWING
Linearity not Guaranteed
Limited by Noise
Figure 3. Analog Input Range vs AVDD
VREFCM + 0.5
× VSWING ≤ AVDD –1 V
VREFCM – 0.5
× VSWING ≥ 0.8 V
Where:
VREFCM = (VREFP + VREFM)/2 is the common mode reference voltage.
VSWING = dynamic range of the input signal,
VSWING = VINP – VINM,
And the common mode input voltage is:
VINCM = (VINP + VINM)/2,
MAX VSWING = MIN [(AVDD – 1.9 V), 3 V]
For single-ended input, the analog input range is between VREFP and VREFM. So the range of
single-ended VIN is:
3 V
if AVDD = 3 V
1 V
if AVDD = 3 V
0.8 V
if AVDD = 2.7 V
For differential input, the input common mode voltage VINCM can be between AVDD and AGND as long as
3 V
≥ (VINP–VINM) ≥ 0.8 V.
This means VINCM
≥ 0.4 V.
So the range of differential analog input voltage, (VINP–VINM) is:
3 V
if AVDD = 3 V
1 V
if AVDD = 3 V
0.8 V
if AVDD = 2.7 V
相關(guān)PDF資料
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