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TDA8785H Datasheet(PDF) 8 Page - NXP Semiconductors

Part # TDA8785H
Description  8-bit high-speed analog-to-digital converter with gain and offset controls
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA8785H Datasheet(HTML) 8 Page - NXP Semiconductors

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1997 Dec 18
8
Philips Semiconductors
Product specification
8-bit high-speed analog-to-digital converter
with gain and offset controls
TDA8785
CHARACTERISTICS
VCCA1 =VCCA2 =VCCD =VCCO = 4.75 to 5.25 V; AGND, DGND and OGND short-circuited together;
VCCA to VCCD =VCCD to VCCO =VCCA to VCCO = −0.25 to +0.25 V; Tamb =0to70 °C;
typical values measured at VCCA =VCCD =VCCO = 5 V and Tamb =25 °C; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX. UNIT
Supplies
VCCA1
analog supply voltage 1
4.75
5.0
5.25
V
VCCA2
analog supply voltage 2
4.75
5.0
5.25
V
VCCD
digital supply voltage
4.75
5.0
5.25
V
VCCO
TTL output supply voltage
4.75
5.0
5.25
V
ICCA
analog supply current
80
mA
ICCD
digital supply current
37
mA
ICCO
TTL output supply current
9
mA
Reference voltages (pins Vref and VRB)
Vo(ref)
output reference voltage
2.60
2.75
2.90
V
Vline
line regulation voltage
VCCA = 4.75 to 5.25 V
4
mV
Io(L)
output load current
−0.5
+0.5
mA
VRB
reference voltage output bottom
(decoupling)
VCCA − 2.5
V
Voffset(B)
offset voltage bottom
code 0
− VRB
250
mV
∆V
ADC
ADC reference voltage difference
between
code 0 and 255
1
V
Analog inputs (pins Vi(p) and Vi(n)); see Table 1
Vi(diff)(p-p)
differential input voltage Vi(p) − Vi(n)
(peak-to-peak value)
0 dB gain
1000
mV
20 dB gain
100
mV
VI
DC input voltage
2.5
3.0
3.5
V
Ii
input current
7
−µA
Zi
input impedance
20
k
Ci
input capacitance
1
pF
Fast offset amplifier inputs (pins VFOFF(p) and VFOFF(n)); DC parameters
VFOFF(p)
positive input voltage
0 dB gain
500
mV
20 dB gain
50
mV
VFOFF(n)
negative input voltage
0 dB gain
500
mV
20 dB gain
50
mV
VI
DC input voltage
VCCA − 0.75 VCCA − 0.25 VCCA V
Ii
input current
4
−µA
Zi
input impedance
20
k
Ci
input capacitance
1
pF


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