RX21A_15 Datasheet, PDF (103/132 Pages) Renesas Technology Corp – Renesas MCUs

RX21A Group
5.5 ∆Σ A/D Conversion Characteristics
5. Electrical Characteristics
Table 5.36 ∆Σ A/D Conversion Characteristics
Conditions: VCC = AVCC0 = AVCCA = 2.7 to 3.6 V, VSS = AVSS0 = AVSSA = VREFL = VREFL0 = VREFDSL = 0 V,
fPCLKC = 25 MHz, T_a = –40 to +105°C
Item
Min.
Typ.
Max.
Unit
Test Conditions
Resolution
24
24
24
Bit
Reference voltage (VREFDSH)
590
600
610
mV EXREF = 0
BGR_BO pin applied voltage
—
1220
—
mV EXREF = 1
BGR_BO pin voltage to reference voltage
—
0.492
—
conversion coefficient
—
EXREF = 1
BGR_BO pin impedance
135
—
—
kΩ EXREF = 1
Reference voltage temperature coefficient
—
—
30
ppm/°C
Gain (×1)
—
1.00
—
—
Gain (×2)
—
2.00
—
—
Gain (×4)
—
4.00
—
—
Gain (×8)
—
8.00
—
—
Gain (×16)
—
16.00
—
—
Gain (×32)
—
32.00
—
—
Gain (×64)
—
64.00
—
—
Differential input voltage
(ANDSiP - ANDSiN) (i = 0 to 3)
–500.0
—
–250.0
—
500.0
250.0
mV GAIN = 000b, Figure 5.55
mV GAIN = 001b
–125.0
—
125.0
mV GAIN = 010b
–62.5
—
62.5
mV GAIN = 011b
–31.2
—
31.2
mV GAIN = 100b
–14.4
—
14.4
mV GAIN = 101b
–5.0
—
5.0
mV GAIN = 110b
Differential input Common mode voltage
—
700.0
—
mV
Single-ended input voltage
–500.0
—
500.0
mV GAIN = 00b, Figure 5.56
–250.0
—
250.0
mV GAIN = 01b
–125.0
—
125.0
mV GAIN = 10b
Conversion with the ∆Σ modulator only
Differential input voltage
–500.0
—
500.0
mV GAIN = 000b, 001b, 010b, 011b, 100b
(DSADGSR0 to 3)
GAIN = 00b, 01b, 10b
(DSADGSR4 to 6)
–250.0
—
250.0
mV GAIN = 101b (DSADGSR0 to 3)
–125.0
—
125.0
mV GAIN = 110b (DSADGSR0 to 3)
Conversion with the ∆Σ modulator only
Common mode input voltage
—
700.0
—
mV
PGA input pin bias voltage
—
700.0
—
mV
PGA output common mode voltage
—
700.0
—
mV
Reference voltage startup time
—
1
5
ms
PGA and ∆Σ modulator startup time
—
—
0.1
ms
Input pull-up resistor
120
200
—
kΩ
Input impedance for differential input
(×1, ×2, ×4, ×8)
40
66
—
kΩ
Input impedance for differential input
(×16, ×32, ×64)
30
50
—
kΩ
Input impedance for single-ended input (×1) 48
80
—
kΩ
Input impedance for single-ended input (×2) 51
86
—
kΩ
R01DS0129EJ0110 Rev.1.10
Aug 28, 2014
Page 103 of 132