TDA8768 Datasheet, PDF (8/20 Pages) NXP Semiconductors – 12-bit high-speed Analog-to-Digital Converter ADC

Philips Semiconductors
12-bit high-speed Analog-to-Digital
Converter (ADC)
Preliminary specification
TDA8768
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP. MAX.
Voltage controlled regulator input V_ref (referenced to AGND); note 2
V_ref(FS)
full-scale fixed voltage
V_CCA = 5 V
−
I_ref
input current
−
V_I(p-p) − V_I(p-p) input voltage amplitude
V_ref = V_CCA − 1.825 V
−
(peak-to-peak value)
3.175 −
0.5 10
2.0 −
Outputs (referenced to OGND)
DIGITAL OUTPUTS D11 TO D0 AND IR (REFERENCED TO OGND)
V_OL
LOW-level output voltage
I_OL = 2 mA
V_OH
HIGH-level output voltage I_OH = −0.4 mA
I_o
output current in 3-state
output level between 0.5 V
and V_CCO
Switching characteristics
0
−
V_CCO − 0.5 −
−20
−
0.5
V_CCO
+20
CLOCK FREQUENCY f_CLK; see Fig.3
f_CLK(min)
f_CLK(max)
minimum clock frequency
maximum clock frequency
TDA8768H/4
TDA8768H/5
t_CLKH
t_CLKL
clock pulse width HIGH
clock pulse width LOW
SH = HIGH
−
−
2
40
−
−
55
−
−
8.5
−
−
8.5
−
−
Analog signal processing; 50% clock duty factor; V_I − V_I = 2.0 V; V_ref = V_CCA − 1.825 V; see Table 1
LINEARITY
INL
DNL
E_offset
integral non-linearity
differential non-linearity
offset error
E_G(FS)
gain error amplitude
(full scale); spread from
device to device
BANDWIDTH (f_CLK = 55 MHz); note 3
B
analog bandwidth
f_CLK = 4 MHz; f_i = 400 kHz −
f_CLK = 4 MHz; f_i = 400 kHz; −
no missing code
V_CCA = V_CCD = V_CCO = 5 V; tbf
T_amb = 25 °C; V_I = V_I;
output code = 2047
V_CCA = V_CCD = V_CCO = 5 V; −5
T_amb = 25 °C;
V_I(p-p) − V_I(p-p) = 2.0 V
−3 dB; full scale input
tbf
±2.0 ±4.5
±0.6 ±1.0
−11 tbf
−
+5
190 −
HARMONICS (f_CLK = 40 MHz)
h_fund(FS)
fundamental harmonics
f_i = 4.43 MHz
−
(full scale)
h_tot(FS)
harmonics (full scale);
all components
f_i = 4.43 MHz
second harmonic
−
third harmonic
−
THD
total harmonic distortion
f_i = 4.43 MHz; note 4
−
−
0
−75 −
−70 −
−66 −
UNIT
V
µA
V
V
V
µA
MHz
MHz
MHz
ns
ns
LSB
LSB
mV
%
MHz
dB
dB
dB
dB
1998 Aug 26
8