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參數資料
| 型號： | THS1230IPWRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | ADC |
| 英文描述： | 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO28 |
| 封裝： | GREEN, PLASTIC, TSSOP-28 |
| 文件頁數： | 7/25頁 |
| 文件大小： | 884K |
| 代理商： | THS1230IPWRG4 |
www.ti.com
VIN+
VIN
R1
R3
THS1230
AIN+
REFT
REFB
AIN
R2
VBIAS
V IN
AVDD
2
THS1230
AIN+
AIN
REFT
REFB
Digital Outputs
THS1230
SLAS291B – OCTOBER 2000 – REVISED MARCH 2004
Figure 18. DC-Coupled Differential Input Circuit
A single-ended source may give better overall system performance when it is converted to a differential signal
before driving the THS1230. The configuration in Figure 19 takes a VIN of 1 V and drives the 1:1 transformer
ratio so that value of AIN+ and AIN– converts to fullscale value at the ADC digital output. With VIN at –1 V the
value at AIN+ and AIN– converts to 0 at the ADC digital outputs.
Figure 19. Transformer Coupled Single-Ended Input
The output of THS1230 is in unsigned binary code. The ADC input over-range indicator is output on pin OVRNG.
Capacitive loading on the output should be kept as low as possible (a maximum loading of 10 pF is
recommended) to ensure best performance. Higher output loading causes higher dynamic output currents and
can therefore increase noise coupling into the part's analog front end. To drive higher loads the use of an output
buffer is recommended.
15
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