ADC0808S125_ADC0808S250_4 © IDT 2012. All rights reserved.
Product data sheet Rev. 04 — 2 July 2012 11 of 22
Integrated Device Technology
ADC0808S125/250
Single 8-bit ADC, up to 125 MHz or 250 MHz
[1] Guaranteed by design.
[2] Vgpd is the voltage of ground potential difference across or between boards.
[3] The ADC input range can be adjusted with an external reference voltage applied to pin FSIN. This voltage must be referenced to AGND.
Vidth input differential threshold voltage |Vgpd| < 50 mV [2] 100 -+100 mV
IIinput current 825 mV < VI < 1 575 mV - - 50 A
1.8 V CMOS clock input; see Figure 4
VIL LOW-level input voltage DGND -0.2VCCD V
VIH HIGH-level input voltage 0.8VCCD - VCCD V
IIL LOW-level input current VIL = 0.2VCCD - - 50 A
IIH HIGH-level input current VIH = 0.8VCCD - - 50 A
Analog inputs: pins IN and INN
Riinput resistance [1] -1.0 - M
Ciinput capacitance [1] -1.0 -pF
VI(cm) common-mode input voltage Vi(IN) = Vi(INN);
output code = 127
0.7 0.95 1.0 V
Digital input pins: OTC, CE_N, DEL0, DEL1, CLKSEL and CCSSEL
VIL LOW-level input voltage DGND -0.2VCCD V
VIH HIGH-level input voltage 0.8VCCD - VCCD V
IIL LOW-level input current VIL = 0.3VCCD - - 50 A
IIH HIGH-level input current VIH = 0.7VCCD - - 50 A
Voltage controlled regulator output: pin CMADC
VO(cm) common-mode output voltage 0.85 0.95 1.1 V
Reference voltage input: pin FSIN[3]
VFSIN voltage on pin FSIN internal reference - 0 0.6 V
external reference 1.15 1.25 1.35 V
Ii(FSIN) input current on pin FSIN -12 -A
Vi(p-p)(max) maximum peak-to-peak input
voltage
internal reference 1.92 22.03 V
external reference
VFSIN = 1.15 V 1.80 1.825 1.85 V
VFSIN = 1.25 V 1.98 1.99 2.03 V
VFSIN = 1.35 V 2.11 2.16 2.18 V
Digital outputs: pins D0 to D7, CCS and IR
VOL LOW-level output voltage OGND - 0.2 V
VOH HIGH-level output voltage VCCO 0.2 - VCCO V
Table 12. Static characteristics …continued
VCCA = 3.0 V to 3.6 V; VCCD = 1.65 V to 1.95 V; VCCO = 1.65 V to 1.95 V; pins AGND1, AGND2 and DGND1 shorted together;
Tamb =
40
C to +85
C; Vi(IN)
Vi(INN) = 2.0 V
0.5 dB; VI(cm) = 0.95 V; VFSIN = 0 V; typical values are measured at
VCCA = 3.3 V, VCCD = VCCO = 1.8 V, Tamb = 25
C and CL = 10 pF; unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit