TDA8798 Datasheet, PDF (10/24 Pages) NXP Semiconductors – Dual 8-bit, 100 Msps A/D converter with DPGA

Philips Semiconductors
Dual 8-bit, 100 Msps A/D converter with
DPGA
Objective specification
TDA8798
HANDLING
Inputs and outputs are protected against electrostatic discharges in normal handling. However, to be totally safe, it is
desirable to take normal precautions appropriate to handling integrated circuits.
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
R_th(j-a)
thermal resistance from junction to ambient in free air
VALUE
68
UNIT
K/W
CHARACTERISTICS
V_DDA = V₅ (or V₁₂ or V₂₀ or V₆₁) to V₈ (or V₉ or V₂₁ or V₆₀) = 3.15 to 3.45 V; V_DDD = V₂₅ (or V₅₆) to V₂₄ (or V₅₇) = 3.0
to 3.6 V; V_DDO = V₃₁ (or V₅₀) to V₃₂ (or V₄₉) = 2.7 to 3.6 V; V_SSA, V_SSD and V_SSO shorted together; V_DDA to
V_DDD = −0.25 to +0.25 V; V_DDD to V_DDO = −0.25 to +0.90 V; V_DDA to V_DDO = −0.25 to +0.75 V; T_amb = 0 to 70 °C; typical
values measured at V_DDA = V_DDD = V_DDO = 3.3 V and T_amb = 25 °C; unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX. UNIT
Supplies
V_DDA
analog supply voltage
3.15
3.3
V_DDD
digital supply voltage
3.0
3.3
V_DDO
output stage supply voltage
2.7
3.3
I_DDA
analog supply current
DPGAEN LOW
−
106
DPGAEN HIGH
−
tbf
I_DDD
digital supply current
−
30
I_DDO
output stage supply current f_CLK = 100 MHz;
−
3
ramp input
3.45 V
3.6 V
3.6 V
−
mA
−
mA
−
mA
−
mA
Digital programmable gain amplifiers
ANALOG INPUTS (VIN1, VIN1N, VIN2 AND VIN2N)
V_{i(dif)(max)(p-p)} maximum differential input
at G_(min)
−
voltage (peak-to-peak value) _{at G(max)}
−
V_i(cm)(DPGA) common mode input voltage
tbf
I_i(DPGA)
input current
at V_i(cm)(DPGA)
−
R_i(DPGA)
input resistance
1
C_i(DPGA)
input capacitance
−
ANALOG OUTPUTS (DPGA1, DPGA1N, DPGA2 AND DPGA2N)
V_{o(dif)(max)(p-p)} maximum differential output at G_(min)
−
voltage (peak-to-peak value) _{at G(max)}
−
V_o(cm)(DPGA) common mode output voltage
−
R_o(DPGA)
output resistance
at V_o(cm)(DPGA)
−
C_o(DPGA)
output capacitance
−
0.5
−
V
10
−
mV
2.8
tbf V
tbf
−
µA
−
−
kΩ
−
5
pF
0.5
−
V
0.5
−
V
3.1
−
V
115
160 Ω
−
5
pF
1999 Sep 16
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