RX634 Datasheet, PDF (91/106 Pages) Renesas Technology Corp – 54 MHz 32-bit RX MCU with FPU, 90 DMIPS, up to 2-Mbyte flash memory

RX634 Group
5. Electrical Characteristics
5.4 A/D Conversion Characteristics
Table 5.30 A/D Conversion Characteristics
Conditions 1: VCC = AVCC0 = VREFH0 = 2.7 to 3.6 V, VREFH = 2.7 V to AVCC0, VSS = AVSS0 = VREFL = VREFL0 = 0 V,
T_a = –40 to +85°C
Conditions 2: VCC = AVCC0 = VREFH0 = 4.0 to 5.5 V, VREFH = 4.0 V to AVCC0, VSS = AVSS0 = VREFL = VREFL0 = 0 V,
T_a = –40 to +85°C
Item
Min.
Typ. Max. Unit
Test Conditions
A/D conversion clock frequency (fPCLKD)
1
—
54
MHz
Resolution
—
—
12
Bit
Conversion time*¹
Permissible signal source 1 (0.4)*²
—
—
μs High-precision channel
(AD clock = 54 MHz) impedance = 1.0 kΩ
Permissible signal source 1.9 (1.3)*² —
—
impedance = 1 kΩ, AVCC ≥
4.0 V
Normal-precision channel
Permissible signal source 2.5 (1.9)*² —
—
impedance = 1 kΩ, AVCC ≥
2.7 V
Analog input capacitance
—
—
30
pF
Offset error
—
±2.0 ±6.0 LSB High-precision channel (SH used)
—
±1.5 ±3.0
High-precision channel (SH not used)
—
±2.0 ±7.5
Normal-precision channel
Full-scale error
—
±2.0 ±6.0 LSB High-precision channel (SH used)
—
±1.5 ±3.0
High-precision channel (SH not used)
—
±2.0 ±7.5
Normal-precision channel
Quantization error
—
±0.5
—
LSB
Absolute accuracy
—
±4.0 ±8.0 LSB High-precision channel (SH used)
—
±2.0 ±6.0
High-precision channel (SH not used)
—
±2.5 ±8.0
Normal-precision channel
DNL differential nonlinearity error
—
±2.0 ±6.0 LSB High-precision channel (SH used)
—
±1.5 ±3.0
High-precision channel (SH not used)
—
±2.0 ±4.0
Normal-precision channel
INL integral nonlinearity error
—
±2.0 ±6.0 LSB High-precision channel (SH used)
—
±1.5 ±3.0
High-precision channel (SH not used)
—
±2.0 ±4.0
Normal-precision channel
Note: The characteristics apply when no pin functions other than A/D converter input are used. Absolute accuracy includes
quantization errors. Offset error, full-scale error, DNL differential nonlinearity error, and INL integral nonlinearity error do not
include quantization errors.
Note: When using the channel-dedicated sample-and-hold circuit, use the AN000 to AN002 analog input voltage (V_AN) that satisfies
all the following conditions: 0.25 V ≤ V_AN ≤ AVCC0 - 0.25 V, V_AN ≤ VREFH0, and AVCC0 ≥ 2.7 V.
Note 1. The conversion time is the sum of the sampling time and the comparison time. As the test conditions, the number of sampling
states is indicated.
Note 2. The value in parentheses indicates the sampling time.
Table 5.31 Sampling Time
Conditions 1: VCC = AVCC0 = VREFH0 = 2.7 to 3.6V, VREFH = 2.7 V to AVCC0, VSS = AVSS0 = VREFL = VREFL0 = 0 V,
T_a = –40 to +85°C
Conditions 2: VCC = AVCC0 = VREFH0 = 4.0 to 5.5V, VREFH = 4.0 V to AVCC0, VSS = AVSS0 = VREFL = VREFL0 = 0 V,
T_a = –40 to +85°C
Item
Symbol
Typ.
Unit
Test Conditions
Sampling time
High-precision channel
Ts
0.2 + 0.16 × R0 (KΩ)
μs Figure 5.36
Normal-precision channel
0.3 + 0.16 × R0 (KΩ)
R01DS0255EJ0100 Rev.1.00
Feb 25, 2015
Page 91 of 106