参数资料
型号: 5962-9957001QRA
厂商: TEXAS INSTRUMENTS INC
元件分类: ADC
英文描述: 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, CDIP20
封装: CERDIP-20
文件页数: 27/47页
文件大小: 764K
代理商: 5962-9957001QRA
TLV2544, TLV2548
2.7 V TO 5.5 V, 12-BIT, 200 KSPS, 4/8 CHANNEL, LOW POWER,
SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH AUTO POWER DOWN
SLAS198A –FEBRUARY 1999– REVISED AUGUST 1999
33
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
1000000000
0111111111
0000000010
0000000001
0000000000
1111111110
0
0.0024
2.4564
2.4576
2.4588
Digital
Output
Code
1000000001
1111111101
1111111111
4.9056
4.9104
4.9152
2048
2047
2
1
0
4094
Step
2049
4093
4095
0.0006
VI – Analog Input Voltage – V
VZT =VZS + 1/2 LSB
VZS
See Notes A and B
4.9134
0.0012
VFT = VFS – 1/2 LSB
VFS
VFS Nom
NOTES: A. This curve is based on the assumption that Vref+ and Vref– have been adjusted so that the voltage at the transition from digital 0 to
1 (VZT) is 0.0006 V, and the transition to full scale (VFT) is 4.9134 V, 1 LSB = 1.2 mV.
B. The full scale value (VFS) is the step whose nominal midstep value has the highest absolute value. The zero-scale value (VZS) is
the step whose nominal midstep value equals zero.
Figure 37. Ideal 12-Bit ADC Conversion Characteristics
GND
CS
XF
TMS320 DSP
TLV2544/
TLV2548
SDI
SDO
SCLK
INT
TXD
RXD
CLKR
BIO
10 k
vcc
AIN
VDD
FSR
FS
CLKX
FSX
Figure 38. Typical Interface to a TMS320 DSP
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